aboutsummaryrefslogtreecommitdiff
path: root/configure.ac
blob: 973394bce3df8ade04125f1aa2693631935d93a3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
4236
4237
4238
4239
4240
4241
4242
4243
4244
4245
4246
4247
4248
4249
4250
4251
4252
4253
4254
4255
4256
4257
4258
4259
4260
4261
4262
4263
4264
4265
4266
4267
4268
4269
4270
4271
4272
4273
4274
4275
4276
4277
4278
4279
4280
4281
4282
4283
4284
4285
4286
4287
4288
4289
4290
4291
4292
4293
4294
4295
4296
4297
4298
4299
4300
4301
4302
4303
4304
4305
4306
4307
4308
4309
4310
4311
4312
4313
4314
4315
4316
4317
4318
4319
4320
4321
4322
4323
4324
4325
4326
4327
4328
4329
4330
4331
4332
4333
4334
4335
4336
4337
4338
4339
4340
4341
4342
4343
4344
4345
4346
4347
4348
4349
4350
4351
4352
4353
4354
4355
4356
4357
4358
4359
4360
4361
4362
4363
4364
4365
4366
4367
4368
4369
4370
4371
4372
4373
4374
4375
4376
4377
4378
4379
4380
4381
4382
4383
4384
4385
4386
4387
4388
4389
4390
4391
4392
4393
4394
4395
4396
4397
4398
4399
4400
4401
4402
4403
4404
4405
4406
4407
4408
4409
4410
4411
4412
4413
4414
4415
4416
4417
4418
4419
4420
4421
4422
4423
4424
4425
4426
4427
4428
4429
4430
4431
4432
4433
4434
4435
4436
4437
4438
4439
4440
4441
4442
4443
4444
4445
4446
4447
4448
4449
4450
4451
4452
4453
4454
4455
4456
4457
4458
4459
4460
4461
4462
4463
4464
4465
4466
4467
4468
4469
4470
4471
4472
4473
4474
4475
4476
4477
4478
4479
4480
4481
4482
4483
4484
4485
4486
4487
4488
4489
4490
4491
4492
4493
4494
4495
4496
4497
4498
4499
4500
4501
4502
4503
4504
4505
4506
4507
4508
4509
4510
4511
4512
4513
4514
4515
4516
4517
4518
4519
4520
4521
4522
4523
4524
4525
4526
4527
4528
4529
4530
4531
4532
4533
4534
4535
4536
4537
4538
4539
4540
4541
4542
4543
4544
4545
4546
4547
4548
4549
4550
4551
4552
4553
4554
4555
4556
4557
4558
4559
4560
4561
4562
4563
4564
4565
4566
4567
4568
4569
4570
4571
4572
4573
4574
4575
4576
4577
4578
4579
4580
4581
4582
4583
4584
4585
4586
4587
4588
4589
4590
4591
4592
4593
4594
4595
4596
4597
4598
4599
4600
4601
4602
4603
4604
4605
4606
4607
4608
4609
4610
4611
4612
4613
4614
4615
4616
4617
4618
4619
4620
4621
4622
4623
4624
4625
4626
4627
4628
4629
4630
4631
4632
4633
4634
4635
4636
4637
4638
4639
4640
4641
4642
4643
4644
4645
4646
4647
4648
4649
4650
4651
4652
4653
4654
4655
4656
4657
4658
4659
4660
4661
4662
4663
4664
4665
4666
4667
4668
4669
4670
4671
4672
4673
4674
4675
4676
4677
4678
4679
4680
4681
4682
4683
4684
4685
4686
4687
4688
4689
4690
4691
4692
4693
4694
4695
4696
4697
4698
4699
4700
4701
4702
4703
4704
4705
4706
4707
4708
4709
4710
4711
4712
4713
4714
4715
4716
4717
4718
4719
4720
4721
4722
4723
4724
4725
4726
4727
4728
4729
4730
4731
4732
4733
4734
4735
4736
4737
4738
4739
4740
4741
4742
4743
4744
4745
4746
4747
4748
4749
4750
4751
4752
4753
4754
4755
4756
4757
4758
4759
4760
4761
4762
4763
4764
4765
4766
4767
4768
4769
4770
4771
4772
4773
4774
4775
4776
4777
4778
4779
4780
4781
4782
4783
4784
4785
4786
4787
4788
4789
4790
4791
4792
4793
4794
4795
4796
4797
4798
4799
4800
4801
4802
4803
4804
4805
4806
4807
4808
4809
4810
4811
4812
4813
4814
4815
4816
4817
4818
4819
4820
4821
4822
4823
4824
4825
4826
4827
4828
4829
4830
4831
4832
4833
4834
4835
4836
4837
4838
4839
4840
4841
4842
4843
4844
4845
4846
4847
4848
4849
4850
4851
4852
4853
4854
4855
4856
4857
4858
4859
4860
4861
4862
4863
4864
4865
4866
4867
4868
4869
4870
4871
4872
4873
4874
4875
4876
4877
4878
4879
4880
4881
4882
4883
4884
4885
4886
4887
4888
4889
4890
4891
4892
4893
4894
4895
4896
4897
4898
4899
4900
4901
4902
4903
4904
4905
4906
4907
4908
4909
4910
4911
4912
4913
4914
4915
4916
4917
4918
4919
4920
#***************************************************************************
#                                  _   _ ____  _
#  Project                     ___| | | |  _ \| |
#                             / __| | | | |_) | |
#                            | (__| |_| |  _ <| |___
#                             \___|\___/|_| \_\_____|
#
# Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at https://curl.haxx.se/docs/copyright.html.
#
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
# copies of the Software, and permit persons to whom the Software is
# furnished to do so, under the terms of the COPYING file.
#
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
# KIND, either express or implied.
#
#***************************************************************************
dnl Process this file with autoconf to produce a configure script.

AC_PREREQ(2.57)

dnl We don't know the version number "statically" so we use a dash here
AC_INIT([curl], [-], [a suitable curl mailing list: https://curl.haxx.se/mail/])

XC_OVR_ZZ50
XC_OVR_ZZ60
CURL_OVERRIDE_AUTOCONF

dnl configure script copyright
AC_COPYRIGHT([Copyright (c) 1998 - 2020 Daniel Stenberg, <daniel@haxx.se>
This configure script may be copied, distributed and modified under the
terms of the curl license; see COPYING for more details])

AC_CONFIG_SRCDIR([lib/urldata.h])
AC_CONFIG_HEADERS(lib/curl_config.h)
AC_CONFIG_MACRO_DIR([m4])
AM_MAINTAINER_MODE
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

CURL_CHECK_OPTION_DEBUG
CURL_CHECK_OPTION_OPTIMIZE
CURL_CHECK_OPTION_WARNINGS
CURL_CHECK_OPTION_WERROR
CURL_CHECK_OPTION_CURLDEBUG
CURL_CHECK_OPTION_SYMBOL_HIDING
CURL_CHECK_OPTION_ARES
CURL_CHECK_OPTION_RT
CURL_CHECK_OPTION_ESNI

XC_CHECK_PATH_SEPARATOR

#
# save the configure arguments
#
CONFIGURE_OPTIONS="\"$ac_configure_args\""
AC_SUBST(CONFIGURE_OPTIONS)

dnl SED is mandatory for configure process and libtool.
dnl Set it now, allowing it to be changed later.
if test -z "$SED"; then
  dnl allow it to be overridden
  AC_PATH_PROG([SED], [sed], [not_found],
    [$PATH:/usr/bin:/usr/local/bin])
  if test -z "$SED" || test "$SED" = "not_found"; then
    AC_MSG_ERROR([sed not found in PATH. Cannot continue without sed.])
  fi
fi
AC_SUBST([SED])

dnl GREP is mandatory for configure process and libtool.
dnl Set it now, allowing it to be changed later.
if test -z "$GREP"; then
  dnl allow it to be overridden
  AC_PATH_PROG([GREP], [grep], [not_found],
    [$PATH:/usr/bin:/usr/local/bin])
  if test -z "$GREP" || test "$GREP" = "not_found"; then
    AC_MSG_ERROR([grep not found in PATH. Cannot continue without grep.])
  fi
fi
AC_SUBST([GREP])

dnl EGREP is mandatory for configure process and libtool.
dnl Set it now, allowing it to be changed later.
if test -z "$EGREP"; then
  dnl allow it to be overridden
  if echo a | ($GREP -E '(a|b)') >/dev/null 2>&1; then
    AC_MSG_CHECKING([for egrep])
    EGREP="$GREP -E"
    AC_MSG_RESULT([$EGREP])
  else
    AC_PATH_PROG([EGREP], [egrep], [not_found],
      [$PATH:/usr/bin:/usr/local/bin])
  fi
fi
if test -z "$EGREP" || test "$EGREP" = "not_found"; then
  AC_MSG_ERROR([egrep not found in PATH. Cannot continue without egrep.])
fi
AC_SUBST([EGREP])

dnl AR is mandatory for configure process and libtool.
dnl This is target dependent, so check it as a tool.
if test -z "$AR"; then
  dnl allow it to be overridden
  AC_PATH_TOOL([AR], [ar], [not_found],
    [$PATH:/usr/bin:/usr/local/bin])
  if test -z "$AR" || test "$AR" = "not_found"; then
    AC_MSG_ERROR([ar not found in PATH. Cannot continue without ar.])
  fi
fi
AC_SUBST([AR])

AC_SUBST(libext)

dnl figure out the libcurl version
CURLVERSION=`$SED -ne 's/^#define LIBCURL_VERSION "\(.*\)".*/\1/p' ${srcdir}/include/curl/curlver.h`
XC_CHECK_PROG_CC

dnl for --enable-code-coverage
CURL_COVERAGE

XC_AUTOMAKE
AC_MSG_CHECKING([curl version])
AC_MSG_RESULT($CURLVERSION)

AC_SUBST(CURLVERSION)

dnl
dnl we extract the numerical version for curl-config only
VERSIONNUM=`$SED -ne 's/^#define LIBCURL_VERSION_NUM 0x\([0-9A-Fa-f]*\).*/\1/p' ${srcdir}/include/curl/curlver.h`
AC_SUBST(VERSIONNUM)

dnl Solaris pkgadd support definitions
PKGADD_PKG="HAXXcurl"
PKGADD_NAME="curl - a client that groks URLs"
PKGADD_VENDOR="curl.haxx.se"
AC_SUBST(PKGADD_PKG)
AC_SUBST(PKGADD_NAME)
AC_SUBST(PKGADD_VENDOR)

dnl
dnl initialize all the info variables
    curl_ssl_msg="no      (--with-{ssl,gnutls,nss,mbedtls,wolfssl,schannel,secure-transport,mesalink,amissl,bearssl} )"
    curl_ssh_msg="no      (--with-{libssh,libssh2})"
   curl_zlib_msg="no      (--with-zlib)"
 curl_brotli_msg="no      (--with-brotli)"
    curl_gss_msg="no      (--with-gssapi)"
curl_tls_srp_msg="no      (--enable-tls-srp)"
    curl_res_msg="default (--enable-ares / --enable-threaded-resolver)"
   curl_ipv6_msg="no      (--enable-ipv6)"
curl_unix_sockets_msg="no      (--enable-unix-sockets)"
    curl_idn_msg="no      (--with-{libidn2,winidn})"
 curl_manual_msg="no      (--enable-manual)"
curl_libcurl_msg="enabled (--disable-libcurl-option)"
curl_verbose_msg="enabled (--disable-verbose)"
   curl_sspi_msg="no      (--enable-sspi)"
   curl_ldap_msg="no      (--enable-ldap / --with-ldap-lib / --with-lber-lib)"
  curl_ldaps_msg="no      (--enable-ldaps)"
   curl_rtsp_msg="no      (--enable-rtsp)"
   curl_rtmp_msg="no      (--with-librtmp)"
  curl_mtlnk_msg="no      (--with-libmetalink)"
    curl_psl_msg="no      (--with-libpsl)"

    ssl_backends=

dnl
dnl Save some initial values the user might have provided
dnl
INITIAL_LDFLAGS=$LDFLAGS
INITIAL_LIBS=$LIBS

dnl
dnl Detect the canonical host and target build environment
dnl

AC_CANONICAL_HOST
dnl Get system canonical name
AC_DEFINE_UNQUOTED(OS, "${host}", [cpu-machine-OS])

# Silence warning: ar: 'u' modifier ignored since 'D' is the default
AC_SUBST(AR_FLAGS, [cr])

dnl This defines _ALL_SOURCE for AIX
CURL_CHECK_AIX_ALL_SOURCE

dnl Our configure and build reentrant settings
CURL_CONFIGURE_THREAD_SAFE
CURL_CONFIGURE_REENTRANT

dnl check for how to do large files
AC_SYS_LARGEFILE

XC_LIBTOOL

#
# Automake conditionals based on libtool related checks
#

AM_CONDITIONAL([CURL_LT_SHLIB_USE_VERSION_INFO],
  [test "x$xc_lt_shlib_use_version_info" = 'xyes'])
AM_CONDITIONAL([CURL_LT_SHLIB_USE_NO_UNDEFINED],
  [test "x$xc_lt_shlib_use_no_undefined" = 'xyes'])
AM_CONDITIONAL([CURL_LT_SHLIB_USE_MIMPURE_TEXT],
  [test "x$xc_lt_shlib_use_mimpure_text" = 'xyes'])

#
# Due to libtool and automake machinery limitations of not allowing
# specifying separate CPPFLAGS or CFLAGS when compiling objects for
# inclusion of these in shared or static libraries, we are forced to
# build using separate configure runs for shared and static libraries
# on systems where different CPPFLAGS or CFLAGS are mandatory in order
# to compile objects for each kind of library. Notice that relying on
# the '-DPIC' CFLAG that libtool provides is not valid given that the
# user might for example choose to build static libraries with PIC.
#

#
# Make our Makefile.am files use the staticlib CPPFLAG only when strictly
# targeting a static library and not building its shared counterpart.
#

AM_CONDITIONAL([USE_CPPFLAG_CURL_STATICLIB],
  [test "x$xc_lt_build_static_only" = 'xyes'])

#
# Make staticlib CPPFLAG variable and its definition visible in output
# files unconditionally, providing an empty definition unless strictly
# targeting a static library and not building its shared counterpart.
#

CPPFLAG_CURL_STATICLIB=
if test "x$xc_lt_build_static_only" = 'xyes'; then
  CPPFLAG_CURL_STATICLIB='-DCURL_STATICLIB'
fi
AC_SUBST([CPPFLAG_CURL_STATICLIB])


# Determine whether all dependent libraries must be specified when linking
if test "X$enable_shared" = "Xyes" -a "X$link_all_deplibs" = "Xno"
then
    REQUIRE_LIB_DEPS=no
else
    REQUIRE_LIB_DEPS=yes
fi
AC_SUBST(REQUIRE_LIB_DEPS)
AM_CONDITIONAL(USE_EXPLICIT_LIB_DEPS, test x$REQUIRE_LIB_DEPS = xyes)

dnl check if there's a way to force code inline
AC_C_INLINE

dnl **********************************************************************
dnl platform/compiler/architecture specific checks/flags
dnl **********************************************************************

CURL_CHECK_COMPILER
CURL_SET_COMPILER_BASIC_OPTS
CURL_SET_COMPILER_DEBUG_OPTS
CURL_SET_COMPILER_OPTIMIZE_OPTS
CURL_SET_COMPILER_WARNING_OPTS

if test "$compiler_id" = "INTEL_UNIX_C"; then
  #
  if test "$compiler_num" -ge "1000"; then
    dnl icc 10.X or later
    CFLAGS="$CFLAGS -shared-intel"
  elif test "$compiler_num" -ge "900"; then
    dnl icc 9.X specific
    CFLAGS="$CFLAGS -i-dynamic"
  fi
  #
fi

CURL_CFLAG_EXTRAS=""
if test X"$want_werror" = Xyes; then
  CURL_CFLAG_EXTRAS="-Werror"
  if test "$compiler_id" = "GNU_C"; then
    dnl enable -pedantic-errors for GCC 5 and later,
    dnl as before that it was the same as -Werror=pedantic
    if test "$compiler_num" -ge "500"; then
      CURL_CFLAG_EXTRAS="$CURL_CFLAG_EXTRAS -pedantic-errors"
    fi
  fi
fi
AC_SUBST(CURL_CFLAG_EXTRAS)

CURL_CHECK_COMPILER_HALT_ON_ERROR
CURL_CHECK_COMPILER_ARRAY_SIZE_NEGATIVE
CURL_CHECK_COMPILER_PROTOTYPE_MISMATCH
CURL_CHECK_COMPILER_SYMBOL_HIDING

CURL_CHECK_CURLDEBUG
AM_CONDITIONAL(CURLDEBUG, test x$want_curldebug = xyes)

supports_unittests=yes
# cross-compilation of unit tests static library/programs fails when
# libcurl shared library is built. This might be due to a libtool or
# automake issue. In this case we disable unit tests.
if test "x$cross_compiling" != "xno" &&
   test "x$enable_shared" != "xno"; then
  supports_unittests=no
fi

# IRIX 6.5.24 gcc 3.3 autobuilds fail unittests library compilation due to
# a problem related with OpenSSL headers and library versions not matching.
# Disable unit tests while time to further investigate this is found.
case $host in
  mips-sgi-irix6.5)
    if test "$compiler_id" = "GNU_C"; then
      supports_unittests=no
    fi
    ;;
esac

# All AIX autobuilds fails unit tests linking against unittests library
# due to unittests library being built with no symbols or members. Libtool ?
# Disable unit tests while time to further investigate this is found.
case $host_os in
  aix*)
    supports_unittests=no
    ;;
esac

dnl Build unit tests when option --enable-debug is given.
if test "x$want_debug" = "xyes" &&
   test "x$supports_unittests" = "xyes"; then
  want_unittests=yes
else
  want_unittests=no
fi
AM_CONDITIONAL(BUILD_UNITTESTS, test x$want_unittests = xyes)

dnl **********************************************************************
dnl Compilation based checks should not be done before this point.
dnl **********************************************************************

dnl **********************************************************************
dnl Make sure that our checks for headers windows.h winsock.h winsock2.h
dnl and ws2tcpip.h take precedence over any other further checks which
dnl could be done later using AC_CHECK_HEADER or AC_CHECK_HEADERS for
dnl this specific header files. And do them before its results are used.
dnl **********************************************************************

CURL_CHECK_HEADER_WINDOWS
CURL_CHECK_NATIVE_WINDOWS
case X-"$curl_cv_native_windows" in
  X-yes)
    CURL_CHECK_HEADER_WINSOCK
    CURL_CHECK_HEADER_WINSOCK2
    CURL_CHECK_HEADER_WS2TCPIP
    CURL_CHECK_HEADER_WINLDAP
    CURL_CHECK_HEADER_WINBER
    ;;
  *)
    curl_cv_header_winsock_h="no"
    curl_cv_header_winsock2_h="no"
    curl_cv_header_ws2tcpip_h="no"
    curl_cv_header_winldap_h="no"
    curl_cv_header_winber_h="no"
    ;;
esac
CURL_CHECK_WIN32_LARGEFILE

CURL_MAC_CFLAGS
CURL_SUPPORTS_BUILTIN_AVAILABLE


dnl ************************************************************
dnl switch off particular protocols
dnl
AC_MSG_CHECKING([whether to support http])
AC_ARG_ENABLE(http,
AC_HELP_STRING([--enable-http],[Enable HTTP support])
AC_HELP_STRING([--disable-http],[Disable HTTP support]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_HTTP, 1, [to disable HTTP])
       disable_http="yes"
       AC_MSG_WARN([disable HTTP disables FTP over proxy and RTSP])
       AC_SUBST(CURL_DISABLE_HTTP, [1])
       AC_DEFINE(CURL_DISABLE_RTSP, 1, [to disable RTSP])
       AC_SUBST(CURL_DISABLE_RTSP, [1])
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)
AC_MSG_CHECKING([whether to support ftp])
AC_ARG_ENABLE(ftp,
AC_HELP_STRING([--enable-ftp],[Enable FTP support])
AC_HELP_STRING([--disable-ftp],[Disable FTP support]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_FTP, 1, [to disable FTP])
       AC_SUBST(CURL_DISABLE_FTP, [1])
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)
AC_MSG_CHECKING([whether to support file])
AC_ARG_ENABLE(file,
AC_HELP_STRING([--enable-file],[Enable FILE support])
AC_HELP_STRING([--disable-file],[Disable FILE support]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_FILE, 1, [to disable FILE])
       AC_SUBST(CURL_DISABLE_FILE, [1])
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)
AC_MSG_CHECKING([whether to support ldap])
AC_ARG_ENABLE(ldap,
AC_HELP_STRING([--enable-ldap],[Enable LDAP support])
AC_HELP_STRING([--disable-ldap],[Disable LDAP support]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_LDAP, 1, [to disable LDAP])
       AC_SUBST(CURL_DISABLE_LDAP, [1])
       ;;
  *)
       AC_MSG_RESULT(yes)
       ;;
  esac ],[
       AC_MSG_RESULT(yes) ]
)
AC_MSG_CHECKING([whether to support ldaps])
AC_ARG_ENABLE(ldaps,
AC_HELP_STRING([--enable-ldaps],[Enable LDAPS support])
AC_HELP_STRING([--disable-ldaps],[Disable LDAPS support]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_LDAPS, 1, [to disable LDAPS])
       AC_SUBST(CURL_DISABLE_LDAPS, [1])
       ;;
  *)   if test "x$CURL_DISABLE_LDAP" = "x1" ; then
         AC_MSG_RESULT(LDAP needs to be enabled to support LDAPS)
         AC_DEFINE(CURL_DISABLE_LDAPS, 1, [to disable LDAPS])
         AC_SUBST(CURL_DISABLE_LDAPS, [1])
       else
         AC_MSG_RESULT(yes)
         AC_DEFINE(HAVE_LDAP_SSL, 1, [Use LDAPS implementation])
         AC_SUBST(HAVE_LDAP_SSL, [1])
       fi
       ;;
  esac ],[
       if test "x$CURL_DISABLE_LDAP" = "x1" ; then
         AC_MSG_RESULT(no)
         AC_DEFINE(CURL_DISABLE_LDAPS, 1, [to disable LDAPS])
         AC_SUBST(CURL_DISABLE_LDAPS, [1])
       else
         AC_MSG_RESULT(yes)
         AC_DEFINE(HAVE_LDAP_SSL, 1, [Use LDAPS implementation])
         AC_SUBST(HAVE_LDAP_SSL, [1])
       fi ]
)

AC_MSG_CHECKING([whether to support rtsp])
AC_ARG_ENABLE(rtsp,
AC_HELP_STRING([--enable-rtsp],[Enable RTSP support])
AC_HELP_STRING([--disable-rtsp],[Disable RTSP support]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_RTSP, 1, [to disable RTSP])
       AC_SUBST(CURL_DISABLE_RTSP, [1])
       ;;
  *)   if test x$CURL_DISABLE_HTTP = x1 ; then
          AC_MSG_ERROR(HTTP support needs to be enabled in order to enable RTSP support!)
       else
          AC_MSG_RESULT(yes)
          curl_rtsp_msg="enabled"
       fi
       ;;
  esac ],
       if test "x$CURL_DISABLE_HTTP" != "x1"; then
          AC_MSG_RESULT(yes)
          curl_rtsp_msg="enabled"
       else
          AC_MSG_RESULT(no)
       fi
)

AC_MSG_CHECKING([whether to support proxies])
AC_ARG_ENABLE(proxy,
AC_HELP_STRING([--enable-proxy],[Enable proxy support])
AC_HELP_STRING([--disable-proxy],[Disable proxy support]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_PROXY, 1, [to disable proxies])
       AC_SUBST(CURL_DISABLE_PROXY, [1])
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)

AC_MSG_CHECKING([whether to support dict])
AC_ARG_ENABLE(dict,
AC_HELP_STRING([--enable-dict],[Enable DICT support])
AC_HELP_STRING([--disable-dict],[Disable DICT support]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_DICT, 1, [to disable DICT])
       AC_SUBST(CURL_DISABLE_DICT, [1])
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)
AC_MSG_CHECKING([whether to support telnet])
AC_ARG_ENABLE(telnet,
AC_HELP_STRING([--enable-telnet],[Enable TELNET support])
AC_HELP_STRING([--disable-telnet],[Disable TELNET support]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_TELNET, 1, [to disable TELNET])
       AC_SUBST(CURL_DISABLE_TELNET, [1])
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)
AC_MSG_CHECKING([whether to support tftp])
AC_ARG_ENABLE(tftp,
AC_HELP_STRING([--enable-tftp],[Enable TFTP support])
AC_HELP_STRING([--disable-tftp],[Disable TFTP support]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_TFTP, 1, [to disable TFTP])
       AC_SUBST(CURL_DISABLE_TFTP, [1])
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)

AC_MSG_CHECKING([whether to support pop3])
AC_ARG_ENABLE(pop3,
AC_HELP_STRING([--enable-pop3],[Enable POP3 support])
AC_HELP_STRING([--disable-pop3],[Disable POP3 support]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_POP3, 1, [to disable POP3])
       AC_SUBST(CURL_DISABLE_POP3, [1])
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)


AC_MSG_CHECKING([whether to support imap])
AC_ARG_ENABLE(imap,
AC_HELP_STRING([--enable-imap],[Enable IMAP support])
AC_HELP_STRING([--disable-imap],[Disable IMAP support]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_IMAP, 1, [to disable IMAP])
       AC_SUBST(CURL_DISABLE_IMAP, [1])
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)


AC_MSG_CHECKING([whether to support smb])
AC_ARG_ENABLE(smb,
AC_HELP_STRING([--enable-smb],[Enable SMB/CIFS support])
AC_HELP_STRING([--disable-smb],[Disable SMB/CIFS support]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_SMB, 1, [to disable SMB/CIFS])
       AC_SUBST(CURL_DISABLE_SMB, [1])
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)

AC_MSG_CHECKING([whether to support smtp])
AC_ARG_ENABLE(smtp,
AC_HELP_STRING([--enable-smtp],[Enable SMTP support])
AC_HELP_STRING([--disable-smtp],[Disable SMTP support]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_SMTP, 1, [to disable SMTP])
       AC_SUBST(CURL_DISABLE_SMTP, [1])
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)

AC_MSG_CHECKING([whether to support gopher])
AC_ARG_ENABLE(gopher,
AC_HELP_STRING([--enable-gopher],[Enable Gopher support])
AC_HELP_STRING([--disable-gopher],[Disable Gopher support]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_GOPHER, 1, [to disable Gopher])
       AC_SUBST(CURL_DISABLE_GOPHER, [1])
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)


dnl **********************************************************************
dnl Check for built-in manual
dnl **********************************************************************

AC_MSG_CHECKING([whether to provide built-in manual])
AC_ARG_ENABLE(manual,
AC_HELP_STRING([--enable-manual],[Enable built-in manual])
AC_HELP_STRING([--disable-manual],[Disable built-in manual]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       ;;
  *)   AC_MSG_RESULT(yes)
       USE_MANUAL="1"
       ;;
  esac ],
       AC_MSG_RESULT(yes)
       USE_MANUAL="1"
)
dnl The actual use of the USE_MANUAL variable is done much later in this
dnl script to allow other actions to disable it as well.

dnl ************************************************************
dnl disable C code generation support
dnl
AC_MSG_CHECKING([whether to enable generation of C code])
AC_ARG_ENABLE(libcurl_option,
AC_HELP_STRING([--enable-libcurl-option],[Enable --libcurl C code generation support])
AC_HELP_STRING([--disable-libcurl-option],[Disable --libcurl C code generation support]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_LIBCURL_OPTION, 1, [to disable --libcurl C code generation option])
       curl_libcurl_msg="no"
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)

dnl **********************************************************************
dnl Checks for libraries.
dnl **********************************************************************

AC_MSG_CHECKING([whether to use libgcc])
AC_ARG_ENABLE(libgcc,
AC_HELP_STRING([--enable-libgcc],[use libgcc when linking]),
[ case "$enableval" in
  yes)
       LIBS="-lgcc $LIBS"
       AC_MSG_RESULT(yes)
       ;;
  *)   AC_MSG_RESULT(no)
       ;;
  esac ],
       AC_MSG_RESULT(no)
)

CURL_CHECK_LIB_XNET

dnl gethostbyname without lib or in the nsl lib?
AC_CHECK_FUNC(gethostbyname,
              [HAVE_GETHOSTBYNAME="1"
              ],
              [ AC_CHECK_LIB(nsl, gethostbyname,
                             [HAVE_GETHOSTBYNAME="1"
                             LIBS="-lnsl $LIBS"
                             ])
              ])

if test "$HAVE_GETHOSTBYNAME" != "1"
then
  dnl gethostbyname in the socket lib?
  AC_CHECK_LIB(socket, gethostbyname,
               [HAVE_GETHOSTBYNAME="1"
               LIBS="-lsocket $LIBS"
               ])
fi

if test "$HAVE_GETHOSTBYNAME" != "1"
then
  dnl gethostbyname in the watt lib?
  AC_CHECK_LIB(watt, gethostbyname,
               [HAVE_GETHOSTBYNAME="1"
               CPPFLAGS="-I/dev/env/WATT_ROOT/inc"
               LDFLAGS="-L/dev/env/WATT_ROOT/lib"
               LIBS="-lwatt $LIBS"
               ])
fi

dnl At least one system has been identified to require BOTH nsl and socket
dnl libs at the same time to link properly.
if test "$HAVE_GETHOSTBYNAME" != "1"
then
  AC_MSG_CHECKING([for gethostbyname with both nsl and socket libs])
  my_ac_save_LIBS=$LIBS
  LIBS="-lnsl -lsocket $LIBS"
  AC_LINK_IFELSE([
    AC_LANG_PROGRAM([[
    ]],[[
      gethostbyname();
    ]])
  ],[
    AC_MSG_RESULT([yes])
    HAVE_GETHOSTBYNAME="1"
  ],[
    AC_MSG_RESULT([no])
    LIBS=$my_ac_save_LIBS
  ])
fi

if test "$HAVE_GETHOSTBYNAME" != "1"
then
  dnl This is for winsock systems
  if test "$curl_cv_header_windows_h" = "yes"; then
    if test "$curl_cv_header_winsock_h" = "yes"; then
      case $host in
        *-*-mingw32ce*)
          winsock_LIB="-lwinsock"
          ;;
        *)
          winsock_LIB="-lwsock32"
          ;;
      esac
    fi
    if test "$curl_cv_header_winsock2_h" = "yes"; then
      winsock_LIB="-lws2_32"
    fi
    if test ! -z "$winsock_LIB"; then
      my_ac_save_LIBS=$LIBS
      LIBS="$winsock_LIB $LIBS"
      AC_MSG_CHECKING([for gethostbyname in $winsock_LIB])
      AC_LINK_IFELSE([
        AC_LANG_PROGRAM([[
#ifdef HAVE_WINDOWS_H
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif
#include <windows.h>
#ifdef HAVE_WINSOCK2_H
#include <winsock2.h>
#else
#ifdef HAVE_WINSOCK_H
#include <winsock.h>
#endif
#endif
#endif
        ]],[[
          gethostbyname("www.dummysite.com");
        ]])
      ],[
        AC_MSG_RESULT([yes])
        HAVE_GETHOSTBYNAME="1"
      ],[
        AC_MSG_RESULT([no])
        winsock_LIB=""
        LIBS=$my_ac_save_LIBS
      ])
    fi
  fi
fi

if test "$HAVE_GETHOSTBYNAME" != "1"
then
  dnl This is for Minix 3.1
  AC_MSG_CHECKING([for gethostbyname for Minix 3])
  AC_LINK_IFELSE([
    AC_LANG_PROGRAM([[
/* Older Minix versions may need <net/gen/netdb.h> here instead */
#include <netdb.h>
    ]],[[
      gethostbyname("www.dummysite.com");
    ]])
  ],[
    AC_MSG_RESULT([yes])
    HAVE_GETHOSTBYNAME="1"
  ],[
    AC_MSG_RESULT([no])
  ])
fi

if test "$HAVE_GETHOSTBYNAME" != "1"
then
  dnl This is for eCos with a stubbed DNS implementation
  AC_MSG_CHECKING([for gethostbyname for eCos])
  AC_LINK_IFELSE([
    AC_LANG_PROGRAM([[
#include <stdio.h>
#include <netdb.h>
    ]],[[
      gethostbyname("www.dummysite.com");
    ]])
  ],[
    AC_MSG_RESULT([yes])
    HAVE_GETHOSTBYNAME="1"
  ],[
    AC_MSG_RESULT([no])
  ])
fi

if test "$HAVE_GETHOSTBYNAME" != "1"
then
  dnl This is for AmigaOS with bsdsocket.library - needs testing before -lnet
  AC_MSG_CHECKING([for gethostbyname for AmigaOS bsdsocket.library])
  AC_LINK_IFELSE([
    AC_LANG_PROGRAM([[
#include <proto/bsdsocket.h>
struct Library *SocketBase = NULL;
    ]],[[
      gethostbyname("www.dummysite.com");
    ]])
  ],[
    AC_MSG_RESULT([yes])
    HAVE_GETHOSTBYNAME="1"
    HAVE_PROTO_BSDSOCKET_H="1"
    AC_DEFINE(HAVE_PROTO_BSDSOCKET_H, 1, [if Amiga bsdsocket.library is in use])
    AC_SUBST(HAVE_PROTO_BSDSOCKET_H, [1])
  ],[
    AC_MSG_RESULT([no])
  ])
fi

if test "$HAVE_GETHOSTBYNAME" != "1"
then
  dnl gethostbyname in the network lib - for Haiku OS
  AC_CHECK_LIB(network, gethostbyname,
               [HAVE_GETHOSTBYNAME="1"
               LIBS="-lnetwork $LIBS"
               ])
fi

if test "$HAVE_GETHOSTBYNAME" != "1"
then
  dnl gethostbyname in the net lib - for BeOS
  AC_CHECK_LIB(net, gethostbyname,
               [HAVE_GETHOSTBYNAME="1"
               LIBS="-lnet $LIBS"
               ])
fi


if test "$HAVE_GETHOSTBYNAME" != "1"; then
  AC_MSG_ERROR([couldn't find libraries for gethostbyname()])
fi

CURL_CHECK_LIBS_CONNECT

CURL_NETWORK_LIBS=$LIBS

dnl **********************************************************************
dnl In case that function clock_gettime with monotonic timer is available,
dnl check for additional required libraries.
dnl **********************************************************************
CURL_CHECK_LIBS_CLOCK_GETTIME_MONOTONIC

dnl **********************************************************************
dnl The preceding library checks are all potentially useful for test
dnl servers and libtest cases which require networking and clock_gettime
dnl support.  Save the list of required libraries at this point for use
dnl while linking those test servers and programs.
dnl **********************************************************************
CURL_NETWORK_AND_TIME_LIBS=$LIBS

dnl **********************************************************************
dnl Check for the presence of ZLIB libraries and headers
dnl **********************************************************************

dnl Check for & handle argument to --with-zlib.

clean_CPPFLAGS=$CPPFLAGS
clean_LDFLAGS=$LDFLAGS
clean_LIBS=$LIBS
ZLIB_LIBS=""
AC_ARG_WITH(zlib,
AC_HELP_STRING([--with-zlib=PATH],[search for zlib in PATH])
AC_HELP_STRING([--without-zlib],[disable use of zlib]),
               [OPT_ZLIB="$withval"])

if test "$OPT_ZLIB" = "no" ; then
    AC_MSG_WARN([zlib disabled])
else
  if test "$OPT_ZLIB" = "yes" ; then
    OPT_ZLIB=""
  fi

  if test -z "$OPT_ZLIB" ; then
    CURL_CHECK_PKGCONFIG(zlib)

    if test "$PKGCONFIG" != "no" ; then
      LIBS="`$PKGCONFIG --libs-only-l zlib` $LIBS"
      LDFLAGS="$LDFLAGS `$PKGCONFIG --libs-only-L zlib`"
      CPPFLAGS="$CPPFLAGS `$PKGCONFIG --cflags-only-I zlib`"
      OPT_ZLIB=""
      HAVE_LIBZ="1"
    fi

    if test -z "$HAVE_LIBZ"; then

      dnl Check for the lib without setting any new path, since many
      dnl people have it in the default path

      AC_CHECK_LIB(z, inflateEnd,
                   dnl libz found, set the variable
                   [HAVE_LIBZ="1"
                    LIBS="-lz $LIBS"],
                   dnl if no lib found, try /usr/local
                   [OPT_ZLIB="/usr/local"])
    fi
  fi

  dnl Add a nonempty path to the compiler flags
  if test -n "$OPT_ZLIB"; then
     CPPFLAGS="$CPPFLAGS -I$OPT_ZLIB/include"
     LDFLAGS="$LDFLAGS -L$OPT_ZLIB/lib$libsuff"
  fi

  AC_CHECK_HEADER(zlib.h,
    [
    dnl zlib.h was found
    HAVE_ZLIB_H="1"
    dnl if the lib wasn't found already, try again with the new paths
    if test "$HAVE_LIBZ" != "1"; then
      AC_CHECK_LIB(z, gzread,
                   [
                   dnl the lib was found!
                   HAVE_LIBZ="1"
                   LIBS="-lz $LIBS"
                   ],
                   [ CPPFLAGS=$clean_CPPFLAGS
                   LDFLAGS=$clean_LDFLAGS])
    fi
    ],
    [
      dnl zlib.h was not found, restore the flags
      CPPFLAGS=$clean_CPPFLAGS
      LDFLAGS=$clean_LDFLAGS]
    )

  if test "$HAVE_LIBZ" = "1" && test "$HAVE_ZLIB_H" != "1"
  then
    AC_MSG_WARN([configure found only the libz lib, not the header file!])
    HAVE_LIBZ=""
    CPPFLAGS=$clean_CPPFLAGS
    LDFLAGS=$clean_LDFLAGS
    LIBS=$clean_LIBS
  elif test "$HAVE_LIBZ" != "1" && test "$HAVE_ZLIB_H" = "1"
  then
    AC_MSG_WARN([configure found only the libz header file, not the lib!])
    CPPFLAGS=$clean_CPPFLAGS
    LDFLAGS=$clean_LDFLAGS
    LIBS=$clean_LIBS
  elif test "$HAVE_LIBZ" = "1" && test "$HAVE_ZLIB_H" = "1"
  then
    dnl both header and lib were found!
    AC_SUBST(HAVE_LIBZ)
    AC_DEFINE(HAVE_ZLIB_H, 1, [if you have the zlib.h header file])
    AC_DEFINE(HAVE_LIBZ, 1, [if zlib is available])

    ZLIB_LIBS="-lz"
    LIBS="-lz $clean_LIBS"

    dnl replace 'HAVE_LIBZ' in the automake makefile.ams
    AMFIXLIB="1"
    AC_MSG_NOTICE([found both libz and libz.h header])
    curl_zlib_msg="enabled"
  fi
fi

dnl set variable for use in automakefile(s)
AM_CONDITIONAL(HAVE_LIBZ, test x"$AMFIXLIB" = x1)
AC_SUBST(ZLIB_LIBS)

dnl **********************************************************************
dnl Check for the presence of BROTLI decoder libraries and headers
dnl **********************************************************************

dnl Brotli project home page: https://github.com/google/brotli

dnl Default to compiler & linker defaults for BROTLI files & libraries.
OPT_BROTLI=off
AC_ARG_WITH(brotli,dnl
AC_HELP_STRING([--with-brotli=PATH],[Where to look for brotli, PATH points to the BROTLI installation; when possible, set the PKG_CONFIG_PATH environment variable instead of using this option])
AC_HELP_STRING([--without-brotli], [disable BROTLI]),
  OPT_BROTLI=$withval)

if test X"$OPT_BROTLI" != Xno; then
  dnl backup the pre-brotli variables
  CLEANLDFLAGS="$LDFLAGS"
  CLEANCPPFLAGS="$CPPFLAGS"
  CLEANLIBS="$LIBS"

  case "$OPT_BROTLI" in
  yes)
    dnl --with-brotli (without path) used
    CURL_CHECK_PKGCONFIG(libbrotlidec)

    if test "$PKGCONFIG" != "no" ; then
      LIB_BROTLI=`$PKGCONFIG --libs-only-l libbrotlidec`
      LD_BROTLI=`$PKGCONFIG --libs-only-L libbrotlidec`
      CPP_BROTLI=`$PKGCONFIG --cflags-only-I libbrotlidec`
      version=`$PKGCONFIG --modversion libbrotlidec`
      DIR_BROTLI=`echo $LD_BROTLI | $SED -e 's/-L//'`
    fi

    ;;
  off)
    dnl no --with-brotli option given, just check default places
    ;;
  *)
    dnl use the given --with-brotli spot
    PREFIX_BROTLI=$OPT_BROTLI
    ;;
  esac

  dnl if given with a prefix, we set -L and -I based on that
  if test -n "$PREFIX_BROTLI"; then
    LIB_BROTLI="-lbrotlidec"
    LD_BROTLI=-L${PREFIX_BROTLI}/lib$libsuff
    CPP_BROTLI=-I${PREFIX_BROTLI}/include
    DIR_BROTLI=${PREFIX_BROTLI}/lib$libsuff
  fi

  LDFLAGS="$LDFLAGS $LD_BROTLI"
  CPPFLAGS="$CPPFLAGS $CPP_BROTLI"
  LIBS="$LIB_BROTLI $LIBS"

  AC_CHECK_LIB(brotlidec, BrotliDecoderDecompress)

  AC_CHECK_HEADERS(brotli/decode.h,
    curl_brotli_msg="enabled (libbrotlidec)"
    HAVE_BROTLI=1
    AC_DEFINE(HAVE_BROTLI, 1, [if BROTLI is in use])
    AC_SUBST(HAVE_BROTLI, [1])
  )

  if test X"$OPT_BROTLI" != Xoff &&
     test "$HAVE_BROTLI" != "1"; then
    AC_MSG_ERROR([BROTLI libs and/or directories were not found where specified!])
  fi

  if test "$HAVE_BROTLI" = "1"; then
    if test -n "$DIR_BROTLI"; then
       dnl when the brotli shared libs were found in a path that the run-time
       dnl linker doesn't search through, we need to add it to CURL_LIBRARY_PATH
       dnl to prevent further configure tests to fail due to this

       if test "x$cross_compiling" != "xyes"; then
         CURL_LIBRARY_PATH="$CURL_LIBRARY_PATH:$DIR_BROTLI"
         export CURL_LIBRARY_PATH
         AC_MSG_NOTICE([Added $DIR_BROTLI to CURL_LIBRARY_PATH])
       fi
    fi
  else
    dnl no brotli, revert back to clean variables
    LDFLAGS=$CLEANLDFLAGS
    CPPFLAGS=$CLEANCPPFLAGS
    LIBS=$CLEANLIBS
  fi
fi

dnl **********************************************************************
dnl Check for LDAP
dnl **********************************************************************

LDAPLIBNAME=""
AC_ARG_WITH(ldap-lib,
AC_HELP_STRING([--with-ldap-lib=libname],[Specify name of ldap lib file]),
 [LDAPLIBNAME="$withval"])

LBERLIBNAME=""
AC_ARG_WITH(lber-lib,
AC_HELP_STRING([--with-lber-lib=libname],[Specify name of lber lib file]),
 [LBERLIBNAME="$withval"])

if test x$CURL_DISABLE_LDAP != x1 ; then

  CURL_CHECK_HEADER_LBER
  CURL_CHECK_HEADER_LDAP
  CURL_CHECK_HEADER_LDAPSSL
  CURL_CHECK_HEADER_LDAP_SSL

  if test -z "$LDAPLIBNAME" ; then
    if test "$curl_cv_native_windows" = "yes"; then
      dnl Windows uses a single and unique LDAP library name
      LDAPLIBNAME="wldap32"
      LBERLIBNAME="no"
    fi
  fi

  if test "$LDAPLIBNAME" ; then
    AC_CHECK_LIB("$LDAPLIBNAME", ldap_init,, [
      AC_MSG_WARN(["$LDAPLIBNAME" is not an LDAP library: LDAP disabled])
      AC_DEFINE(CURL_DISABLE_LDAP, 1, [to disable LDAP])
      AC_SUBST(CURL_DISABLE_LDAP, [1])
      AC_DEFINE(CURL_DISABLE_LDAPS, 1, [to disable LDAPS])
      AC_SUBST(CURL_DISABLE_LDAPS, [1])])
  else
    dnl Try to find the right ldap libraries for this system
    CURL_CHECK_LIBS_LDAP
    case X-"$curl_cv_ldap_LIBS" in
      X-unknown)
        AC_MSG_WARN([Cannot find libraries for LDAP support: LDAP disabled])
        AC_DEFINE(CURL_DISABLE_LDAP, 1, [to disable LDAP])
        AC_SUBST(CURL_DISABLE_LDAP, [1])
        AC_DEFINE(CURL_DISABLE_LDAPS, 1, [to disable LDAPS])
        AC_SUBST(CURL_DISABLE_LDAPS, [1])
        ;;
    esac
  fi
fi

if test x$CURL_DISABLE_LDAP != x1 ; then

  if test "$LBERLIBNAME" ; then
    dnl If name is "no" then don't define this library at all
    dnl (it's only needed if libldap.so's dependencies are broken).
    if test "$LBERLIBNAME" != "no" ; then
      AC_CHECK_LIB("$LBERLIBNAME", ber_free,, [
        AC_MSG_WARN(["$LBERLIBNAME" is not an LBER library: LDAP disabled])
        AC_DEFINE(CURL_DISABLE_LDAP, 1, [to disable LDAP])
        AC_SUBST(CURL_DISABLE_LDAP, [1])
        AC_DEFINE(CURL_DISABLE_LDAPS, 1, [to disable LDAPS])
        AC_SUBST(CURL_DISABLE_LDAPS, [1])])
    fi
  fi
fi

if test x$CURL_DISABLE_LDAP != x1 ; then
  AC_CHECK_FUNCS([ldap_url_parse ldap_init_fd])

  if test "$LDAPLIBNAME" = "wldap32"; then
    curl_ldap_msg="enabled (winldap)"
    AC_DEFINE(USE_WIN32_LDAP, 1, [Use Windows LDAP implementation])
  else
    curl_ldap_msg="enabled (OpenLDAP)"
    if test "x$ac_cv_func_ldap_init_fd" = "xyes"; then
      AC_DEFINE(USE_OPENLDAP, 1, [Use OpenLDAP-specific code])
      AC_SUBST(USE_OPENLDAP, [1])
    fi
  fi
fi

if test x$CURL_DISABLE_LDAPS != x1 ; then
    curl_ldaps_msg="enabled"
fi

dnl **********************************************************************
dnl Checks for IPv6
dnl **********************************************************************

AC_MSG_CHECKING([whether to enable IPv6])
AC_ARG_ENABLE(ipv6,
AC_HELP_STRING([--enable-ipv6],[Enable IPv6 (with IPv4) support])
AC_HELP_STRING([--disable-ipv6],[Disable IPv6 support]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       ipv6=no
       ;;
  *)   AC_MSG_RESULT(yes)
       ipv6=yes
       ;;
  esac ],

  AC_TRY_RUN([ /* are AF_INET6 and sockaddr_in6 available? */
#include <sys/types.h>
#ifdef HAVE_WINSOCK2_H
#include <winsock2.h>
#include <ws2tcpip.h>
#else
#include <sys/socket.h>
#include <netinet/in.h>
#if defined (__TANDEM)
# include <netinet/in6.h>
#endif
#endif
#include <stdlib.h> /* for exit() */
main()
{
 struct sockaddr_in6 s;
 (void)s;
 if (socket(AF_INET6, SOCK_STREAM, 0) < 0)
   exit(1);
 else
   exit(0);
}
],
  AC_MSG_RESULT(yes)
  ipv6=yes,
  AC_MSG_RESULT(no)
  ipv6=no,
  AC_MSG_RESULT(yes)
  ipv6=yes
))

if test "$ipv6" = yes; then
  curl_ipv6_msg="enabled"
  AC_DEFINE(ENABLE_IPV6, 1, [Define if you want to enable IPv6 support])
  IPV6_ENABLED=1
  AC_SUBST(IPV6_ENABLED)

  AC_MSG_CHECKING([if struct sockaddr_in6 has sin6_scope_id member])
  AC_TRY_COMPILE([
#include <sys/types.h>
#ifdef HAVE_WINSOCK2_H
#include <winsock2.h>
#include <ws2tcpip.h>
#else
#include <netinet/in.h>
#if defined (__TANDEM)
# include <netinet/in6.h>
#endif
#endif] ,
  struct sockaddr_in6 s; s.sin6_scope_id = 0; , have_sin6_scope_id=yes)
  if test "$have_sin6_scope_id" = yes; then
    AC_MSG_RESULT([yes])
    AC_DEFINE(HAVE_SOCKADDR_IN6_SIN6_SCOPE_ID, 1, [Define to 1 if struct sockaddr_in6 has the sin6_scope_id member])
  else
    AC_MSG_RESULT([no])
  fi
fi

dnl **********************************************************************
dnl Check if the operating system allows programs to write to their own argv[]
dnl **********************************************************************

AC_MSG_CHECKING([if argv can be written to])
CURL_RUN_IFELSE([
int main(int argc, char ** argv) {
    argv[0][0] = ' ';
    return (argv[0][0] == ' ')?0:1;
}
],[
  curl_cv_writable_argv=yes
],[
  curl_cv_writable_argv=no
],[
  curl_cv_writable_argv=cross
])
case $curl_cv_writable_argv in
yes)
        AC_DEFINE(HAVE_WRITABLE_ARGV, 1, [Define this symbol if your OS supports changing the contents of argv])
        AC_MSG_RESULT(yes)
        ;;
no)
        AC_MSG_RESULT(no)
        ;;
*)
        AC_MSG_RESULT(no)
        AC_MSG_WARN([the previous check could not be made default was used])
        ;;
esac

dnl **********************************************************************
dnl Check for GSS-API libraries
dnl **********************************************************************

dnl check for GSS-API stuff in the /usr as default

GSSAPI_ROOT="/usr"
AC_ARG_WITH(gssapi-includes,
  AC_HELP_STRING([--with-gssapi-includes=DIR],
                 [Specify location of GSS-API headers]),
  [ GSSAPI_INCS="-I$withval"
    want_gss="yes" ]
)

AC_ARG_WITH(gssapi-libs,
  AC_HELP_STRING([--with-gssapi-libs=DIR],
                 [Specify location of GSS-API libs]),
  [ GSSAPI_LIB_DIR="-L$withval"
    want_gss="yes" ]
)

AC_ARG_WITH(gssapi,
  AC_HELP_STRING([--with-gssapi=DIR],
                 [Where to look for GSS-API]), [
  GSSAPI_ROOT="$withval"
  if test x"$GSSAPI_ROOT" != xno; then
    want_gss="yes"
    if test x"$GSSAPI_ROOT" = xyes; then
      dnl if yes, then use default root
      GSSAPI_ROOT="/usr"
    fi
  fi
])

: ${KRB5CONFIG:="$GSSAPI_ROOT/bin/krb5-config"}

save_CPPFLAGS="$CPPFLAGS"
AC_MSG_CHECKING([if GSS-API support is requested])
if test x"$want_gss" = xyes; then
  AC_MSG_RESULT(yes)

  if test -z "$GSSAPI_INCS"; then
     if test -n "$host_alias" -a -f "$GSSAPI_ROOT/bin/$host_alias-krb5-config"; then
        GSSAPI_INCS=`$GSSAPI_ROOT/bin/$host_alias-krb5-config --cflags gssapi`
     elif test -f "$KRB5CONFIG"; then
        GSSAPI_INCS=`$KRB5CONFIG --cflags gssapi`
     elif test "$GSSAPI_ROOT" != "yes"; then
        GSSAPI_INCS="-I$GSSAPI_ROOT/include"
     fi
  fi

  CPPFLAGS="$CPPFLAGS $GSSAPI_INCS"

  AC_CHECK_HEADER(gss.h,
    [
      dnl found in the given dirs
      AC_DEFINE(HAVE_GSSGNU, 1, [if you have GNU GSS])
      gnu_gss=yes
    ],
    [
      dnl not found, check Heimdal or MIT
      AC_CHECK_HEADERS([gssapi/gssapi.h], [], [not_mit=1])
      AC_CHECK_HEADERS(
        [gssapi/gssapi_generic.h gssapi/gssapi_krb5.h],
        [],
        [not_mit=1],
        [
AC_INCLUDES_DEFAULT
#ifdef HAVE_GSSAPI_GSSAPI_H
#include <gssapi/gssapi.h>
#endif
        ])
      if test "x$not_mit" = "x1"; then
        dnl MIT not found, check for Heimdal
        AC_CHECK_HEADER(gssapi.h,
            [
              dnl found
              AC_DEFINE(HAVE_GSSHEIMDAL, 1, [if you have Heimdal])
            ],
            [
              dnl no header found, disabling GSS
              want_gss=no
              AC_MSG_WARN(disabling GSS-API support since no header files were found)
            ]
          )
      else
        dnl MIT found
        AC_DEFINE(HAVE_GSSMIT, 1, [if you have MIT Kerberos])
        dnl check if we have a really old MIT Kerberos version (<= 1.2)
        AC_MSG_CHECKING([if GSS-API headers declare GSS_C_NT_HOSTBASED_SERVICE])
        AC_COMPILE_IFELSE([
          AC_LANG_PROGRAM([[
#include <gssapi/gssapi.h>
#include <gssapi/gssapi_generic.h>
#include <gssapi/gssapi_krb5.h>
          ]],[[
            gss_import_name(
                            (OM_uint32 *)0,
                            (gss_buffer_t)0,
                            GSS_C_NT_HOSTBASED_SERVICE,
                            (gss_name_t *)0);
          ]])
        ],[
          AC_MSG_RESULT([yes])
        ],[
          AC_MSG_RESULT([no])
          AC_DEFINE(HAVE_OLD_GSSMIT, 1,
            [if you have an old MIT Kerberos version, lacking GSS_C_NT_HOSTBASED_SERVICE])
        ])
      fi
    ]
  )
else
  AC_MSG_RESULT(no)
fi
if test x"$want_gss" = xyes; then
  AC_DEFINE(HAVE_GSSAPI, 1, [if you have GSS-API libraries])
  HAVE_GSSAPI=1
  curl_gss_msg="enabled (MIT Kerberos/Heimdal)"

  if test -n "$gnu_gss"; then
    curl_gss_msg="enabled (GNU GSS)"
    LDFLAGS="$LDFLAGS $GSSAPI_LIB_DIR"
    LIBS="-lgss $LIBS"
  elif test -z "$GSSAPI_LIB_DIR"; then
     case $host in
     *-*-darwin*)
        LIBS="-lgssapi_krb5 -lresolv $LIBS"
        ;;
     *)
        if test -n "$host_alias" -a -f "$GSSAPI_ROOT/bin/$host_alias-krb5-config"; then
           dnl krb5-config doesn't have --libs-only-L or similar, put everything
           dnl into LIBS
           gss_libs=`$GSSAPI_ROOT/bin/$host_alias-krb5-config --libs gssapi`
           LIBS="$gss_libs $LIBS"
        elif test -f "$KRB5CONFIG"; then
           dnl krb5-config doesn't have --libs-only-L or similar, put everything
           dnl into LIBS
           gss_libs=`$KRB5CONFIG --libs gssapi`
           LIBS="$gss_libs $LIBS"
        else
           case $host in
           *-hp-hpux*)
              gss_libname="gss"
              ;;
           *)
              gss_libname="gssapi"
              ;;
           esac

           if test "$GSSAPI_ROOT" != "yes"; then
              LDFLAGS="$LDFLAGS -L$GSSAPI_ROOT/lib$libsuff"
              LIBS="-l$gss_libname $LIBS"
           else
              LIBS="-l$gss_libname $LIBS"
           fi
        fi
        ;;
     esac
  else
     LDFLAGS="$LDFLAGS $GSSAPI_LIB_DIR"
     case $host in
     *-hp-hpux*)
        LIBS="-lgss $LIBS"
        ;;
     *)
        LIBS="-lgssapi $LIBS"
        ;;
     esac
  fi
else
  CPPFLAGS="$save_CPPFLAGS"
fi

build_libstubgss=no
if test x"$want_gss" = "xyes"; then
  build_libstubgss=yes
fi

AM_CONDITIONAL(BUILD_STUB_GSS, test "x$build_libstubgss" = "xyes")

dnl -------------------------------------------------------------
dnl parse --with-default-ssl-backend so it can be validated below
dnl -------------------------------------------------------------

DEFAULT_SSL_BACKEND=no
VALID_DEFAULT_SSL_BACKEND=
AC_ARG_WITH(default-ssl-backend,
AC_HELP_STRING([--with-default-ssl-backend=NAME],[Use NAME as default SSL backend])
AC_HELP_STRING([--without-default-ssl-backend],[Use implicit default SSL backend]),
  [DEFAULT_SSL_BACKEND=$withval])
case "$DEFAULT_SSL_BACKEND" in
  no)
    dnl --without-default-ssl-backend option used
    ;;
  default|yes)
    dnl --with-default-ssl-backend option used without name
    AC_MSG_ERROR([The name of the default SSL backend is required.])
    ;;
  *)
    dnl --with-default-ssl-backend option used with name
    AC_SUBST(DEFAULT_SSL_BACKEND)
    dnl needs to be validated below
    VALID_DEFAULT_SSL_BACKEND=no
    ;;
esac

dnl **********************************************************************

dnl -------------------------------------------------
dnl check winssl option before other SSL libraries
dnl -------------------------------------------------

OPT_WINSSL=no
AC_ARG_WITH(winssl,dnl
AC_HELP_STRING([--with-winssl],[enable Windows native SSL/TLS])
AC_HELP_STRING([--without-winssl], [disable Windows native SSL/TLS]),
  OPT_WINSSL=$withval)

AC_ARG_WITH(schannel,dnl
AC_HELP_STRING([--with-schannel],[enable Windows native SSL/TLS])
AC_HELP_STRING([--without-schannel], [disable Windows native SSL/TLS]),
  OPT_WINSSL=$withval)

AC_MSG_CHECKING([whether to enable Windows native SSL/TLS (Windows native builds only)])
if test -z "$ssl_backends" -o "x$OPT_WINSSL" != xno; then
  ssl_msg=
  if test "x$OPT_WINSSL" != "xno"  &&
     test "x$curl_cv_native_windows" = "xyes"; then
    AC_MSG_RESULT(yes)
    AC_DEFINE(USE_SCHANNEL, 1, [to enable Windows native SSL/TLS support])
    AC_SUBST(USE_SCHANNEL, [1])
    ssl_msg="Windows-native"
    test schannel != "$DEFAULT_SSL_BACKEND" || VALID_DEFAULT_SSL_BACKEND=yes
    WINSSL_ENABLED=1
    # --with-winssl implies --enable-sspi
    AC_DEFINE(USE_WINDOWS_SSPI, 1, [to enable SSPI support])
    AC_SUBST(USE_WINDOWS_SSPI, [1])
    curl_sspi_msg="enabled"
    LIBS="-lcrypt32 $LIBS"
  else
    AC_MSG_RESULT(no)
  fi
  test -z "$ssl_msg" || ssl_backends="${ssl_backends:+$ssl_backends, }$ssl_msg"
else
  AC_MSG_RESULT(no)
fi

OPT_SECURETRANSPORT=no
AC_ARG_WITH(darwinssl,dnl
AC_HELP_STRING([--with-darwinssl],[enable Apple OS native SSL/TLS])
AC_HELP_STRING([--without-darwinssl], [disable Apple OS native SSL/TLS]),
  OPT_SECURETRANSPORT=$withval)

AC_ARG_WITH(secure-transport,dnl
AC_HELP_STRING([--with-secure-transport],[enable Apple OS native SSL/TLS])
AC_HELP_STRING([--without-secure-transport], [disable Apple OS native SSL/TLS]),
  OPT_SECURETRANSPORT=$withval)

AC_MSG_CHECKING([whether to enable Secure Transport])
if test -z "$ssl_backends" -o "x$OPT_SECURETRANSPORT" != xno; then
  if test "x$OPT_SECURETRANSPORT" != "xno" &&
     test -d "/System/Library/Frameworks/Security.framework"; then
    AC_MSG_RESULT(yes)
    AC_DEFINE(USE_SECTRANSP, 1, [enable Secure Transport])
    AC_SUBST(USE_SECTRANSP, [1])
    ssl_msg="Secure Transport"
    test secure-transport != "$DEFAULT_SSL_BACKEND" || VALID_DEFAULT_SSL_BACKEND=yes
    SECURETRANSPORT_ENABLED=1
    LDFLAGS="$LDFLAGS -framework CoreFoundation -framework Security"
  else
    AC_MSG_RESULT(no)
  fi
  test -z "$ssl_msg" || ssl_backends="${ssl_backends:+$ssl_backends, }$ssl_msg"
else
  AC_MSG_RESULT(no)
fi

OPT_AMISSL=no
AC_ARG_WITH(amissl,dnl
AC_HELP_STRING([--with-amissl],[enable Amiga native SSL/TLS (AmiSSL)])
AC_HELP_STRING([--without-amissl], [disable Amiga native SSL/TLS (AmiSSL)]),
  OPT_AMISSL=$withval)

AC_MSG_CHECKING([whether to enable Amiga native SSL/TLS (AmiSSL)])
if test "$HAVE_PROTO_BSDSOCKET_H" = "1"; then
  if test -z "$ssl_backends" -o "x$OPT_AMISSL" != xno; then
    ssl_msg=
    if test "x$OPT_AMISSL" != "xno"; then
      AC_MSG_RESULT(yes)
      ssl_msg="AmiSSL"
      test amissl != "$DEFAULT_SSL_BACKEND" || VALID_DEFAULT_SSL_BACKEND=yes
      AMISSL_ENABLED=1
      LIBS="-lamisslauto $LIBS"
      AC_DEFINE(USE_AMISSL, 1, [if AmiSSL is in use])
      AC_DEFINE(USE_OPENSSL, 1, [if OpenSSL is in use])
    else
      AC_MSG_RESULT(no)
    fi
    test -z "$ssl_msg" || ssl_backends="${ssl_backends:+$ssl_backends, }$ssl_msg"
  else
    AC_MSG_RESULT(no)
  fi
else
  AC_MSG_RESULT(no)
fi

dnl **********************************************************************
dnl Check for the presence of SSL libraries and headers
dnl **********************************************************************

dnl Default to compiler & linker defaults for SSL files & libraries.
OPT_SSL=off
dnl Default to no CA bundle
ca="no"
AC_ARG_WITH(ssl,dnl
AC_HELP_STRING([--with-ssl=PATH],[Where to look for OpenSSL, PATH points to the SSL installation (default: /usr/local/ssl); when possible, set the PKG_CONFIG_PATH environment variable instead of using this option])
AC_HELP_STRING([--without-ssl], [disable OpenSSL]),
  OPT_SSL=$withval)

if test -z "$ssl_backends" -o "x$OPT_SSL" != xno &&
   test X"$OPT_SSL" != Xno; then
  ssl_msg=

  dnl backup the pre-ssl variables
  CLEANLDFLAGS="$LDFLAGS"
  CLEANCPPFLAGS="$CPPFLAGS"
  CLEANLIBS="$LIBS"

  dnl This is for Msys/Mingw
  case $host in
    *-*-msys* | *-*-mingw*)
      AC_MSG_CHECKING([for gdi32])
      my_ac_save_LIBS=$LIBS
      LIBS="-lgdi32 $LIBS"
      AC_TRY_LINK([#include <windef.h>
                   #include <wingdi.h>],
                   [GdiFlush();],
                   [ dnl worked!
                   AC_MSG_RESULT([yes])],
                   [ dnl failed, restore LIBS
                   LIBS=$my_ac_save_LIBS
                   AC_MSG_RESULT(no)]
                  )
      ;;
  esac

  case "$OPT_SSL" in
  yes)
    dnl --with-ssl (without path) used
    if test x$cross_compiling != xyes; then
      dnl only do pkg-config magic when not cross-compiling
      PKGTEST="yes"
    fi
    PREFIX_OPENSSL=/usr/local/ssl
    LIB_OPENSSL="$PREFIX_OPENSSL/lib$libsuff"
    ;;
  off)
    dnl no --with-ssl option given, just check default places
    if test x$cross_compiling != xyes; then
      dnl only do pkg-config magic when not cross-compiling
      PKGTEST="yes"
    fi
    PREFIX_OPENSSL=
    ;;
  *)
    dnl check the given --with-ssl spot
    PKGTEST="no"
    PREFIX_OPENSSL=$OPT_SSL

    dnl Try pkg-config even when cross-compiling.  Since we
    dnl specify PKG_CONFIG_LIBDIR we're only looking where
    dnl the user told us to look
    OPENSSL_PCDIR="$OPT_SSL/lib/pkgconfig"
    if test -f "$OPENSSL_PCDIR/openssl.pc"; then
      AC_MSG_NOTICE([PKG_CONFIG_LIBDIR will be set to "$OPENSSL_PCDIR"])
      PKGTEST="yes"
    elif test ! -f "$PREFIX_OPENSSL/include/openssl/ssl.h"; then
      AC_MSG_ERROR([$PREFIX_OPENSSL is a bad --with-ssl prefix!])
    fi

    dnl in case pkg-config comes up empty, use what we got
    dnl via --with-ssl
    LIB_OPENSSL="$PREFIX_OPENSSL/lib$libsuff"
    if test "$PREFIX_OPENSSL" != "/usr" ; then
      SSL_LDFLAGS="-L$LIB_OPENSSL"
      SSL_CPPFLAGS="-I$PREFIX_OPENSSL/include"
    fi
    SSL_CPPFLAGS="$SSL_CPPFLAGS -I$PREFIX_OPENSSL/include/openssl"
    ;;
  esac

  if test "$PKGTEST" = "yes"; then

    CURL_CHECK_PKGCONFIG(openssl, [$OPENSSL_PCDIR])

    if test "$PKGCONFIG" != "no" ; then
      SSL_LIBS=`CURL_EXPORT_PCDIR([$OPENSSL_PCDIR]) dnl
        $PKGCONFIG --libs-only-l --libs-only-other openssl 2>/dev/null`

      SSL_LDFLAGS=`CURL_EXPORT_PCDIR([$OPENSSL_PCDIR]) dnl
        $PKGCONFIG --libs-only-L openssl 2>/dev/null`

      SSL_CPPFLAGS=`CURL_EXPORT_PCDIR([$OPENSSL_PCDIR]) dnl
        $PKGCONFIG --cflags-only-I openssl 2>/dev/null`

      AC_SUBST(SSL_LIBS)
      AC_MSG_NOTICE([pkg-config: SSL_LIBS: "$SSL_LIBS"])
      AC_MSG_NOTICE([pkg-config: SSL_LDFLAGS: "$SSL_LDFLAGS"])
      AC_MSG_NOTICE([pkg-config: SSL_CPPFLAGS: "$SSL_CPPFLAGS"])

      LIB_OPENSSL=`echo $SSL_LDFLAGS | sed -e 's/-L//g'`

      dnl use the values pkg-config reported.  This is here
      dnl instead of below with CPPFLAGS and LDFLAGS because we only
      dnl learn about this via pkg-config.  If we only have
      dnl the argument to --with-ssl we don't know what
      dnl additional libs may be necessary.  Hope that we
      dnl don't need any.
      LIBS="$SSL_LIBS $LIBS"
    fi
  fi

  dnl finally, set flags to use SSL
  CPPFLAGS="$CPPFLAGS $SSL_CPPFLAGS"
  LDFLAGS="$LDFLAGS $SSL_LDFLAGS"

  AC_CHECK_LIB(crypto, HMAC_Update,[
     HAVECRYPTO="yes"
     LIBS="-lcrypto $LIBS"
     ],[
     LDFLAGS="$CLEANLDFLAGS -L$LIB_OPENSSL"
     if test "$PKGCONFIG" = "no" ; then
       # only set this if pkg-config wasn't used
       CPPFLAGS="$CLEANCPPFLAGS -I$PREFIX_OPENSSL/include/openssl -I$PREFIX_OPENSSL/include"
     fi
     AC_CHECK_LIB(crypto, HMAC_Init_ex,[
       HAVECRYPTO="yes"
       LIBS="-lcrypto $LIBS"], [

       dnl still no, but what about with -ldl?
       AC_MSG_CHECKING([OpenSSL linking with -ldl])
       LIBS="$CLEANLIBS -lcrypto -ldl"
       AC_TRY_LINK(
       [
         #include <openssl/err.h>
       ],
       [
         ERR_clear_error();
       ],
       [
         AC_MSG_RESULT(yes)
         HAVECRYPTO="yes"
       ],
       [
         AC_MSG_RESULT(no)
         dnl ok, so what about both -ldl and -lpthread?

         AC_MSG_CHECKING([OpenSSL linking with -ldl and -lpthread])
         LIBS="$CLEANLIBS -lcrypto -ldl -lpthread"
         AC_TRY_LINK(
         [
           #include <openssl/err.h>
         ],
         [
           ERR_clear_error();
         ],
         [
           AC_MSG_RESULT(yes)
           HAVECRYPTO="yes"
         ],
         [
           AC_MSG_RESULT(no)
           LDFLAGS="$CLEANLDFLAGS"
           CPPFLAGS="$CLEANCPPFLAGS"
           LIBS="$CLEANLIBS"

         ])

       ])

     ])
  ])

  if test X"$HAVECRYPTO" = X"yes"; then
    dnl This is only reasonable to do if crypto actually is there: check for
    dnl SSL libs NOTE: it is important to do this AFTER the crypto lib

    AC_CHECK_LIB(ssl, SSL_connect)

    if test "$ac_cv_lib_ssl_SSL_connect" != yes; then
        dnl we didn't find the SSL lib, try the RSAglue/rsaref stuff
        AC_MSG_CHECKING(for ssl with RSAglue/rsaref libs in use);
        OLIBS=$LIBS
        LIBS="-lRSAglue -lrsaref $LIBS"
        AC_CHECK_LIB(ssl, SSL_connect)
        if test "$ac_cv_lib_ssl_SSL_connect" != yes; then
            dnl still no SSL_connect
            AC_MSG_RESULT(no)
            LIBS=$OLIBS
        else
            AC_MSG_RESULT(yes)
        fi

    else

      dnl Have the libraries--check for OpenSSL headers
      AC_CHECK_HEADERS(openssl/x509.h openssl/rsa.h openssl/crypto.h \
                       openssl/pem.h openssl/ssl.h openssl/err.h,
        ssl_msg="OpenSSL"
	test openssl != "$DEFAULT_SSL_BACKEND" || VALID_DEFAULT_SSL_BACKEND=yes
        OPENSSL_ENABLED=1
        AC_DEFINE(USE_OPENSSL, 1, [if OpenSSL is in use]))

      if test $ac_cv_header_openssl_x509_h = no; then
        dnl we don't use the "action" part of the AC_CHECK_HEADERS macro
        dnl since 'err.h' might in fact find a krb4 header with the same
        dnl name
        AC_CHECK_HEADERS(x509.h rsa.h crypto.h pem.h ssl.h err.h)

        if test $ac_cv_header_x509_h = yes &&
           test $ac_cv_header_crypto_h = yes &&
           test $ac_cv_header_ssl_h = yes; then
          dnl three matches
          ssl_msg="OpenSSL"
          OPENSSL_ENABLED=1
        fi
      fi
    fi

    if test X"$OPENSSL_ENABLED" != X"1"; then
       LIBS="$CLEANLIBS"
    fi

    if test X"$OPT_SSL" != Xoff &&
       test "$OPENSSL_ENABLED" != "1"; then
      AC_MSG_ERROR([OpenSSL libs and/or directories were not found where specified!])
    fi
  fi

  if test X"$OPENSSL_ENABLED" = X"1"; then
    dnl These can only exist if OpenSSL exists
    dnl OpenSSL_version is introduced in 3.0.0

    AC_CHECK_FUNCS( RAND_egd \
                    SSLv2_client_method \
                    OpenSSL_version )

    AC_MSG_CHECKING([for BoringSSL])
    AC_COMPILE_IFELSE([
        AC_LANG_PROGRAM([[
                #include <openssl/base.h>
                ]],[[
                #ifndef OPENSSL_IS_BORINGSSL
                #error not boringssl
                #endif
       ]])
    ],[
        AC_MSG_RESULT([yes])
        AC_DEFINE_UNQUOTED(HAVE_BORINGSSL, 1,
                           [Define to 1 if using BoringSSL.])
        ssl_msg="BoringSSL"
    ],[
        AC_MSG_RESULT([no])
    ])

    AC_MSG_CHECKING([for libressl])
    AC_COMPILE_IFELSE([
      AC_LANG_PROGRAM([[
#include <openssl/opensslv.h>
      ]],[[
        int dummy = LIBRESSL_VERSION_NUMBER;
      ]])
    ],[
      AC_MSG_RESULT([yes])
      AC_DEFINE_UNQUOTED(HAVE_LIBRESSL, 1,
        [Define to 1 if using libressl.])
      ssl_msg="libressl"
    ],[
      AC_MSG_RESULT([no])
    ])
  fi

  if test "$OPENSSL_ENABLED" = "1"; then
    if test -n "$LIB_OPENSSL"; then
       dnl when the ssl shared libs were found in a path that the run-time
       dnl linker doesn't search through, we need to add it to CURL_LIBRARY_PATH
       dnl to prevent further configure tests to fail due to this
       if test "x$cross_compiling" != "xyes"; then
         CURL_LIBRARY_PATH="$CURL_LIBRARY_PATH:$LIB_OPENSSL"
         export CURL_LIBRARY_PATH
         AC_MSG_NOTICE([Added $LIB_OPENSSL to CURL_LIBRARY_PATH])
       fi
    fi
    CURL_CHECK_OPENSSL_API
    check_for_ca_bundle=1
  fi

  test -z "$ssl_msg" || ssl_backends="${ssl_backends:+$ssl_backends, }$ssl_msg"
fi

if test X"$OPT_SSL" != Xoff &&
  test X"$OPT_SSL" != Xno &&
  test "$OPENSSL_ENABLED" != "1"; then
  AC_MSG_NOTICE([OPT_SSL: $OPT_SSL])
  AC_MSG_NOTICE([OPENSSL_ENABLED: $OPENSSL_ENABLED])
  AC_MSG_ERROR([--with-ssl was given but OpenSSL could not be detected])
fi

dnl **********************************************************************
dnl Check for the random seed preferences
dnl **********************************************************************

if test X"$OPENSSL_ENABLED" = X"1"; then
  AC_ARG_WITH(egd-socket,
  AC_HELP_STRING([--with-egd-socket=FILE],
                 [Entropy Gathering Daemon socket pathname]),
      [ EGD_SOCKET="$withval" ]
  )
  if test -n "$EGD_SOCKET" ; then
          AC_DEFINE_UNQUOTED(EGD_SOCKET, "$EGD_SOCKET",
          [your Entropy Gathering Daemon socket pathname] )
  fi

  dnl Check for user-specified random device
  AC_ARG_WITH(random,
  AC_HELP_STRING([--with-random=FILE],
                 [read randomness from FILE (default=/dev/urandom)]),
      [ RANDOM_FILE="$withval" ],
      [
          if test x$cross_compiling != xyes; then
            dnl Check for random device
            AC_CHECK_FILE("/dev/urandom", [ RANDOM_FILE="/dev/urandom"] )
          else
            AC_MSG_WARN([skipped the /dev/urandom detection when cross-compiling])
          fi
      ]
  )
  if test -n "$RANDOM_FILE" && test X"$RANDOM_FILE" != Xno ; then
          AC_SUBST(RANDOM_FILE)
          AC_DEFINE_UNQUOTED(RANDOM_FILE, "$RANDOM_FILE",
          [a suitable file to read random data from])
  fi
fi

dnl ---
dnl We require OpenSSL with SRP support.
dnl ---
if test "$OPENSSL_ENABLED" = "1"; then
  AC_CHECK_LIB(crypto, SRP_Calc_client_key,
   [
     AC_DEFINE(HAVE_OPENSSL_SRP, 1, [if you have the function SRP_Calc_client_key])
     AC_SUBST(HAVE_OPENSSL_SRP, [1])
   ])
fi

dnl ---
dnl Whether the OpenSSL configuration will be loaded automatically
dnl ---
if test X"$OPENSSL_ENABLED" = X"1"; then
AC_ARG_ENABLE(openssl-auto-load-config,
AC_HELP_STRING([--enable-openssl-auto-load-config],[Enable automatic loading of OpenSSL configuration])
AC_HELP_STRING([--disable-openssl-auto-load-config],[Disable automatic loading of OpenSSL configuration]),
[ if test X"$enableval" = X"no"; then
    AC_MSG_NOTICE([automatic loading of OpenSSL configuration disabled])
    AC_DEFINE(CURL_DISABLE_OPENSSL_AUTO_LOAD_CONFIG, 1, [if the OpenSSL configuration won't be loaded automatically])
  fi
])
fi

dnl ----------------------------------------------------
dnl check for GnuTLS
dnl ----------------------------------------------------

dnl Default to compiler & linker defaults for GnuTLS files & libraries.
OPT_GNUTLS=no

AC_ARG_WITH(gnutls,dnl
AC_HELP_STRING([--with-gnutls=PATH],[where to look for GnuTLS, PATH points to the installation root])
AC_HELP_STRING([--without-gnutls], [disable GnuTLS detection]),
  OPT_GNUTLS=$withval)

if test -z "$ssl_backends" -o "x$OPT_GNUTLS" != xno; then
  ssl_msg=

  if test X"$OPT_GNUTLS" != Xno; then

    addld=""
    addlib=""
    gtlslib=""
    version=""
    addcflags=""

    if test "x$OPT_GNUTLS" = "xyes"; then
      dnl this is with no partiular path given
      CURL_CHECK_PKGCONFIG(gnutls)

      if test "$PKGCONFIG" != "no" ; then
        addlib=`$PKGCONFIG --libs-only-l gnutls`
        addld=`$PKGCONFIG --libs-only-L gnutls`
        addcflags=`$PKGCONFIG --cflags-only-I gnutls`
        version=`$PKGCONFIG --modversion gnutls`
        gtlslib=`echo $addld | $SED -e 's/-L//'`
      else
        dnl without pkg-config, we try libgnutls-config as that was how it
        dnl used to be done
        check=`libgnutls-config --version 2>/dev/null`
        if test -n "$check"; then
          addlib=`libgnutls-config --libs`
          addcflags=`libgnutls-config --cflags`
          version=`libgnutls-config --version`
          gtlslib=`libgnutls-config --prefix`/lib$libsuff
        fi
      fi
    else
      dnl this is with a given path, first check if there's a libgnutls-config
      dnl there and if not, make an educated guess
      cfg=$OPT_GNUTLS/bin/libgnutls-config
      check=`$cfg --version 2>/dev/null`
      if test -n "$check"; then
        addlib=`$cfg --libs`
        addcflags=`$cfg --cflags`
        version=`$cfg --version`
        gtlslib=`$cfg --prefix`/lib$libsuff
      else
        dnl without pkg-config and libgnutls-config, we guess a lot!
        addlib=-lgnutls
        addld=-L$OPT_GNUTLS/lib$libsuff
        addcflags=-I$OPT_GNUTLS/include
        version="" # we just don't know
        gtlslib=$OPT_GNUTLS/lib$libsuff
      fi
    fi

    if test -z "$version"; then
      dnl lots of efforts, still no go
      version="unknown"
    fi

    if test -n "$addlib"; then

      CLEANLIBS="$LIBS"
      CLEANCPPFLAGS="$CPPFLAGS"
      CLEANLDFLAGS="$LDFLAGS"

      LIBS="$addlib $LIBS"
      LDFLAGS="$LDFLAGS $addld"
      if test "$addcflags" != "-I/usr/include"; then
         CPPFLAGS="$CPPFLAGS $addcflags"
      fi

      AC_CHECK_LIB(gnutls, gnutls_check_version,
       [
       AC_DEFINE(USE_GNUTLS, 1, [if GnuTLS is enabled])
       AC_SUBST(USE_GNUTLS, [1])
       GNUTLS_ENABLED=1
       USE_GNUTLS="yes"
       ssl_msg="GnuTLS"
       test gnutls != "$DEFAULT_SSL_BACKEND" || VALID_DEFAULT_SSL_BACKEND=yes
       ],
       [
         LIBS="$CLEANLIBS"
         CPPFLAGS="$CLEANCPPFLAGS"
       ])

      if test "x$USE_GNUTLS" = "xyes"; then
        AC_MSG_NOTICE([detected GnuTLS version $version])
        check_for_ca_bundle=1
        if test -n "$gtlslib"; then
          dnl when shared libs were found in a path that the run-time
          dnl linker doesn't search through, we need to add it to
          dnl CURL_LIBRARY_PATH to prevent further configure tests to fail
          dnl due to this
          if test "x$cross_compiling" != "xyes"; then
            CURL_LIBRARY_PATH="$CURL_LIBRARY_PATH:$gtlslib"
            export CURL_LIBRARY_PATH
            AC_MSG_NOTICE([Added $gtlslib to CURL_LIBRARY_PATH])
          fi
        fi
        AC_CHECK_FUNCS([gnutls_certificate_set_x509_key_file2 gnutls_alpn_set_protocols gnutls_ocsp_req_init])
      fi

    fi

  fi dnl GNUTLS not disabled

  test -z "$ssl_msg" || ssl_backends="${ssl_backends:+$ssl_backends, }$ssl_msg"
fi

dnl ---
dnl Check which crypto backend GnuTLS uses
dnl ---

if test "$GNUTLS_ENABLED" = "1"; then
  USE_GNUTLS_NETTLE=
  # First check if we can detect either crypto library via transitive linking
  AC_CHECK_LIB(gnutls, nettle_MD5Init, [ USE_GNUTLS_NETTLE=1 ])
  if test "$USE_GNUTLS_NETTLE" = ""; then
    AC_CHECK_LIB(gnutls, gcry_control, [ USE_GNUTLS_NETTLE=0 ])
  fi
  # If not, try linking directly to both of them to see if they are available
  if test "$USE_GNUTLS_NETTLE" = ""; then
    AC_CHECK_LIB(nettle, nettle_MD5Init, [ USE_GNUTLS_NETTLE=1 ])
  fi
  if test "$USE_GNUTLS_NETTLE" = ""; then
    AC_CHECK_LIB(gcrypt, gcry_control, [ USE_GNUTLS_NETTLE=0 ])
  fi
  if test "$USE_GNUTLS_NETTLE" = ""; then
    AC_MSG_ERROR([GnuTLS found, but neither gcrypt nor nettle found])
  fi
  if test "$USE_GNUTLS_NETTLE" = "1"; then
    AC_DEFINE(USE_GNUTLS_NETTLE, 1, [if GnuTLS uses nettle as crypto backend])
    AC_SUBST(USE_GNUTLS_NETTLE, [1])
    LIBS="-lnettle $LIBS"
  else
    LIBS="-lgcrypt $LIBS"
  fi
fi

dnl ---
dnl We require GnuTLS with SRP support.
dnl ---
if test "$GNUTLS_ENABLED" = "1"; then
  AC_CHECK_LIB(gnutls, gnutls_srp_verifier,
   [
     AC_DEFINE(HAVE_GNUTLS_SRP, 1, [if you have the function gnutls_srp_verifier])
     AC_SUBST(HAVE_GNUTLS_SRP, [1])
   ])
fi

dnl ----------------------------------------------------
dnl check for mbedTLS
dnl ----------------------------------------------------

OPT_MBEDTLS=no

_cppflags=$CPPFLAGS
_ldflags=$LDFLAGS
AC_ARG_WITH(mbedtls,dnl
AC_HELP_STRING([--with-mbedtls=PATH],[where to look for mbedTLS, PATH points to the installation root])
AC_HELP_STRING([--without-mbedtls], [disable mbedTLS detection]),
  OPT_MBEDTLS=$withval)

if test -z "$ssl_backends" -o "x$OPT_MBEDTLS" != xno; then
  ssl_msg=

  if test X"$OPT_MBEDTLS" != Xno; then

    if test "$OPT_MBEDTLS" = "yes"; then
      OPT_MBEDTLS=""
    fi

    if test -z "$OPT_MBEDTLS" ; then
      dnl check for lib first without setting any new path

      AC_CHECK_LIB(mbedtls, mbedtls_havege_init,
      dnl libmbedtls found, set the variable
       [
         AC_DEFINE(USE_MBEDTLS, 1, [if mbedTLS is enabled])
         AC_SUBST(USE_MBEDTLS, [1])
         MBEDTLS_ENABLED=1
         USE_MBEDTLS="yes"
         ssl_msg="mbedTLS"
	 test mbedtls != "$DEFAULT_SSL_BACKEND" || VALID_DEFAULT_SSL_BACKEND=yes
        ], [], -lmbedx509 -lmbedcrypto)
    fi

    addld=""
    addlib=""
    addcflags=""
    mbedtlslib=""

    if test "x$USE_MBEDTLS" != "xyes"; then
      dnl add the path and test again
      addld=-L$OPT_MBEDTLS/lib$libsuff
      addcflags=-I$OPT_MBEDTLS/include
      mbedtlslib=$OPT_MBEDTLS/lib$libsuff

      LDFLAGS="$LDFLAGS $addld"
      if test "$addcflags" != "-I/usr/include"; then
         CPPFLAGS="$CPPFLAGS $addcflags"
      fi

      AC_CHECK_LIB(mbedtls, mbedtls_ssl_init,
       [
       AC_DEFINE(USE_MBEDTLS, 1, [if mbedTLS is enabled])
       AC_SUBST(USE_MBEDTLS, [1])
       MBEDTLS_ENABLED=1
       USE_MBEDTLS="yes"
       ssl_msg="mbedTLS"
       test mbedtls != "$DEFAULT_SSL_BACKEND" || VALID_DEFAULT_SSL_BACKEND=yes
       ],
       [
         CPPFLAGS=$_cppflags
         LDFLAGS=$_ldflags
       ], -lmbedx509 -lmbedcrypto)
    fi

    if test "x$USE_MBEDTLS" = "xyes"; then
      AC_MSG_NOTICE([detected mbedTLS])
      check_for_ca_bundle=1

      LIBS="-lmbedtls -lmbedx509 -lmbedcrypto $LIBS"

      if test -n "$mbedtlslib"; then
        dnl when shared libs were found in a path that the run-time
        dnl linker doesn't search through, we need to add it to
        dnl CURL_LIBRARY_PATH to prevent further configure tests to fail
        dnl due to this
        if test "x$cross_compiling" != "xyes"; then
          CURL_LIBRARY_PATH="$CURL_LIBRARY_PATH:$mbedtlslib"
          export CURL_LIBRARY_PATH
          AC_MSG_NOTICE([Added $mbedtlslib to CURL_LIBRARY_PATH])
        fi
      fi
    fi

  fi dnl mbedTLS not disabled

  test -z "$ssl_msg" || ssl_backends="${ssl_backends:+$ssl_backends, }$ssl_msg"
fi

dnl ----------------------------------------------------
dnl check for wolfSSL
dnl ----------------------------------------------------

dnl Default to compiler & linker defaults for wolfSSL files & libraries.
OPT_WOLFSSL=no

_cppflags=$CPPFLAGS
_ldflags=$LDFLAGS

AC_ARG_WITH(wolfssl,dnl
AC_HELP_STRING([--with-wolfssl=PATH],[where to look for WolfSSL, PATH points to the installation root (default: system lib default)])
AC_HELP_STRING([--without-wolfssl], [disable WolfSSL detection]),
  OPT_WOLFSSL=$withval)

if test -z "$ssl_backends" -o "x$OPT_WOLFSSL" != xno; then
  ssl_msg=

  if test X"$OPT_WOLFSSL" != Xno; then

    if test "$OPT_WOLFSSL" = "yes"; then
      OPT_WOLFSSL=""
    fi

    addld=""
    addlib=""
    addcflags=""

    if test "x$USE_WOLFSSL" != "xyes"; then
      addld=-L$OPT_WOLFSSL/lib$libsuff
      addcflags=-I$OPT_WOLFSSL/include
      wolfssllibpath=$OPT_WOLFSSL/lib$libsuff

      LDFLAGS="$LDFLAGS $addld"
      if test "$addcflags" != "-I/usr/include"; then
         CPPFLAGS="$CPPFLAGS $addcflags"
      fi

      my_ac_save_LIBS="$LIBS"
      LIBS="-lwolfssl -lm $LIBS"

      AC_MSG_CHECKING([for wolfSSL_Init in -lwolfssl])
      AC_LINK_IFELSE([
	AC_LANG_PROGRAM([[
/* These aren't needed for detection and confuse WolfSSL.
   They are set up properly later if it is detected.  */
#undef SIZEOF_LONG
#undef SIZEOF_LONG_LONG
#include <wolfssl/ssl.h>
	]],[[
	  return wolfSSL_Init();
	]])
      ],[
         AC_MSG_RESULT(yes)
         AC_DEFINE(USE_WOLFSSL, 1, [if wolfSSL is enabled])
         AC_SUBST(USE_WOLFSSL, [1])
         WOLFSSL_ENABLED=1
         USE_WOLFSSL="yes"
         ssl_msg="WolfSSL"
	 test wolfssl != "$DEFAULT_SSL_BACKEND" || VALID_DEFAULT_SSL_BACKEND=yes
       ],
       [
         AC_MSG_RESULT(no)
         CPPFLAGS=$_cppflags
         LDFLAGS=$_ldflags
         wolfssllibpath=""
       ])
      LIBS="$my_ac_save_LIBS"
    fi

    if test "x$USE_WOLFSSL" = "xyes"; then
      AC_MSG_NOTICE([detected wolfSSL])
      check_for_ca_bundle=1

      dnl wolfssl/ctaocrypt/types.h needs SIZEOF_LONG_LONG defined!
      AX_COMPILE_CHECK_SIZEOF(long long)

      LIBS="-lwolfssl -lm $LIBS"

      dnl Recent WolfSSL versions build without SSLv3 by default
      dnl WolfSSL needs configure --enable-opensslextra to have *get_peer*
      AC_CHECK_FUNCS(wolfSSLv3_client_method \
                     wolfSSL_get_peer_certificate \
                     wolfSSL_UseALPN)

      if test -n "$wolfssllibpath"; then
        dnl when shared libs were found in a path that the run-time
        dnl linker doesn't search through, we need to add it to
        dnl CURL_LIBRARY_PATH to prevent further configure tests to fail
        dnl due to this
        if test "x$cross_compiling" != "xyes"; then
          CURL_LIBRARY_PATH="$CURL_LIBRARY_PATH:$wolfssllibpath"
          export CURL_LIBRARY_PATH
          AC_MSG_NOTICE([Added $wolfssllibpath to CURL_LIBRARY_PATH])
        fi
      fi

    fi

  fi dnl wolfSSL not disabled

  test -z "$ssl_msg" || ssl_backends="${ssl_backends:+$ssl_backends, }$ssl_msg"
fi

dnl ----------------------------------------------------
dnl check for MesaLink
dnl ----------------------------------------------------

dnl Default to compiler & linker defaults for MesaLink files & libraries.
OPT_MESALINK=no

_cppflags=$CPPFLAGS
_ldflags=$LDFLAGS
AC_ARG_WITH(mesalink,dnl
AC_HELP_STRING([--with-mesalink=PATH],[where to look for MesaLink, PATH points to the installation root])
AC_HELP_STRING([--without-mesalink], [disable MesaLink detection]),
  OPT_MESALINK=$withval)

if test -z "$ssl_backends" -o "x$OPT_MESALINK" != xno; then
  ssl_msg=

  if test X"$OPT_MESALINK" != Xno; then

    if test "$OPT_MESALINK" = "yes"; then
      OPT_MESALINK=""
    fi

    if test -z "$OPT_MESALINK" ; then
      dnl check for lib first without setting any new path

      AC_CHECK_LIB(mesalink, mesalink_library_init,
      dnl libmesalink found, set the variable
       [
         AC_DEFINE(USE_MESALINK, 1, [if MesaLink is enabled])
         AC_SUBST(USE_MESALINK, [1])
         MESALINK_ENABLED=1
         USE_MESALINK="yes"
         ssl_msg="MesaLink"
	 test mesalink != "$DEFAULT_SSL_BACKEND" || VALID_DEFAULT_SSL_BACKEND=yes
        ])
    fi

    addld=""
    addlib=""
    addcflags=""
    mesalinklib=""

    if test "x$USE_MESALINK" != "xyes"; then
      dnl add the path and test again
      addld=-L$OPT_MESALINK/lib$libsuff
      addcflags=-I$OPT_MESALINK/include
      mesalinklib=$OPT_MESALINK/lib$libsuff

      LDFLAGS="$LDFLAGS $addld"
      if test "$addcflags" != "-I/usr/include"; then
         CPPFLAGS="$CPPFLAGS $addcflags"
      fi

      AC_CHECK_LIB(mesalink, mesalink_library_init,
       [
       AC_DEFINE(USE_MESALINK, 1, [if MesaLink is enabled])
       AC_SUBST(USE_MESALINK, [1])
       MESALINK_ENABLED=1
       USE_MESALINK="yes"
       ssl_msg="MesaLink"
       test mesalink != "$DEFAULT_SSL_BACKEND" || VALID_DEFAULT_SSL_BACKEND=yes
       ],
       [
         CPPFLAGS=$_cppflags
         LDFLAGS=$_ldflags
       ])
    fi

    if test "x$USE_MESALINK" = "xyes"; then
      AC_MSG_NOTICE([detected MesaLink])

      LIBS="-lmesalink $LIBS"

      if test -n "$mesalinklib"; then
        dnl when shared libs were found in a path that the run-time
        dnl linker doesn't search through, we need to add it to
        dnl LD_LIBRARY_PATH to prevent further configure tests to fail
        dnl due to this
        if test "x$cross_compiling" != "xyes"; then
          LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$mesalinklib"
          export LD_LIBRARY_PATH
          AC_MSG_NOTICE([Added $mesalinklib to LD_LIBRARY_PATH])
        fi
      fi
    fi

  fi dnl MesaLink not disabled

  test -z "$ssl_msg" || ssl_backends="${ssl_backends:+$ssl_backends, }$ssl_msg"
fi

dnl ----------------------------------------------------
dnl check for BearSSL
dnl ----------------------------------------------------

OPT_BEARSSL=no

_cppflags=$CPPFLAGS
_ldflags=$LDFLAGS
AC_ARG_WITH(bearssl,dnl
AC_HELP_STRING([--with-bearssl=PATH],[where to look for BearSSL, PATH points to the installation root])
AC_HELP_STRING([--without-bearssl], [disable BearSSL detection]),
  OPT_BEARSSL=$withval)

if test -z "$ssl_backends" -o "x$OPT_BEARSSL" != xno; then
  ssl_msg=

  if test X"$OPT_BEARSSL" != Xno; then

    if test "$OPT_BEARSSL" = "yes"; then
      OPT_BEARSSL=""
    fi

    if test -z "$OPT_BEARSSL" ; then
      dnl check for lib first without setting any new path

      AC_CHECK_LIB(bearssl, br_ssl_client_init_full,
      dnl libbearssl found, set the variable
       [
         AC_DEFINE(USE_BEARSSL, 1, [if BearSSL is enabled])
         AC_SUBST(USE_BEARSSL, [1])
         BEARSSL_ENABLED=1
         USE_BEARSSL="yes"
         ssl_msg="BearSSL"
	 test bearssl != "$DEFAULT_SSL_BACKEND" || VALID_DEFAULT_SSL_BACKEND=yes
        ], [], -lbearssl)
    fi

    addld=""
    addlib=""
    addcflags=""
    bearssllib=""

    if test "x$USE_BEARSSL" != "xyes"; then
      dnl add the path and test again
      addld=-L$OPT_BEARSSL/lib$libsuff
      addcflags=-I$OPT_BEARSSL/include
      bearssllib=$OPT_BEARSSL/lib$libsuff

      LDFLAGS="$LDFLAGS $addld"
      if test "$addcflags" != "-I/usr/include"; then
         CPPFLAGS="$CPPFLAGS $addcflags"
      fi

      AC_CHECK_LIB(bearssl, br_ssl_client_init_full,
       [
       AC_DEFINE(USE_BEARSSL, 1, [if BearSSL is enabled])
       AC_SUBST(USE_BEARSSL, [1])
       BEARSSL_ENABLED=1
       USE_BEARSSL="yes"
       ssl_msg="BearSSL"
       test bearssl != "$DEFAULT_SSL_BACKEND" || VALID_DEFAULT_SSL_BACKEND=yes
       ],
       [
         CPPFLAGS=$_cppflags
         LDFLAGS=$_ldflags
       ], -lbearssl)
    fi

    if test "x$USE_BEARSSL" = "xyes"; then
      AC_MSG_NOTICE([detected BearSSL])
      check_for_ca_bundle=1

      LIBS="-lbearssl $LIBS"

      if test -n "$bearssllib"; then
        dnl when shared libs were found in a path that the run-time
        dnl linker doesn't search through, we need to add it to
        dnl CURL_LIBRARY_PATH to prevent further configure tests to fail
        dnl due to this
        if test "x$cross_compiling" != "xyes"; then
          CURL_LIBRARY_PATH="$CURL_LIBRARY_PATH:$bearssllib"
          export CURL_LIBRARY_PATH
          AC_MSG_NOTICE([Added $bearssllib to CURL_LIBRARY_PATH])
        fi
      fi
    fi

  fi dnl BearSSL not disabled

  test -z "$ssl_msg" || ssl_backends="${ssl_backends:+$ssl_backends, }$ssl_msg"
fi

dnl ----------------------------------------------------
dnl NSS. Only check if GnuTLS and OpenSSL are not enabled
dnl ----------------------------------------------------

dnl Default to compiler & linker defaults for NSS files & libraries.
OPT_NSS=no

AC_ARG_WITH(nss,dnl
AC_HELP_STRING([--with-nss=PATH],[where to look for NSS, PATH points to the installation root])
AC_HELP_STRING([--without-nss], [disable NSS detection]),
  OPT_NSS=$withval)

if test -z "$ssl_backends" -o "x$OPT_NSS" != xno; then
  ssl_msg=

  if test X"$OPT_NSS" != Xno; then

    addld=""
    addlib=""
    addcflags=""
    nssprefix=""
    version=""

    if test "x$OPT_NSS" = "xyes"; then

      CURL_CHECK_PKGCONFIG(nss)

      if test "$PKGCONFIG" != "no" ; then
        addlib=`$PKGCONFIG --libs nss`
        addcflags=`$PKGCONFIG --cflags nss`
        version=`$PKGCONFIG --modversion nss`
        nssprefix=`$PKGCONFIG --variable=prefix nss`
      else
        dnl Without pkg-config, we check for nss-config

        check=`nss-config --version 2>/dev/null`
        if test -n "$check"; then
          addlib=`nss-config --libs`
          addcflags=`nss-config --cflags`
          version=`nss-config --version`
          nssprefix=`nss-config --prefix`
        else
          addlib="-lnss3"
          addcflags=""
          version="unknown"
        fi
      fi
    else
      NSS_PCDIR="$OPT_NSS/lib/pkgconfig"
      if test -f "$NSS_PCDIR/nss.pc"; then
        CURL_CHECK_PKGCONFIG(nss, [$NSS_PCDIR])
        if test "$PKGCONFIG" != "no" ; then
          addld=`CURL_EXPORT_PCDIR([$NSS_PCDIR]) $PKGCONFIG --libs-only-L nss`
          addlib=`CURL_EXPORT_PCDIR([$NSS_PCDIR]) $PKGCONFIG --libs-only-l nss`
          addcflags=`CURL_EXPORT_PCDIR([$NSS_PCDIR]) $PKGCONFIG --cflags nss`
          version=`CURL_EXPORT_PCDIR([$NSS_PCDIR]) $PKGCONFIG --modversion nss`
          nssprefix=`CURL_EXPORT_PCDIR([$NSS_PCDIR]) $PKGCONFIG --variable=prefix nss`
        fi
      fi
    fi

    if test -z "$addlib"; then
      # Without pkg-config, we'll kludge in some defaults
      AC_MSG_WARN([Using hard-wired libraries and compilation flags for NSS.])
      addld="-L$OPT_NSS/lib"
      addlib="-lssl3 -lsmime3 -lnss3 -lplds4 -lplc4 -lnspr4"
      addcflags="-I$OPT_NSS/include"
      version="unknown"
      nssprefix=$OPT_NSS
    fi

    CLEANLDFLAGS="$LDFLAGS"
    CLEANLIBS="$LIBS"
    CLEANCPPFLAGS="$CPPFLAGS"

    LDFLAGS="$addld $LDFLAGS"
    LIBS="$addlib $LIBS"
    if test "$addcflags" != "-I/usr/include"; then
       CPPFLAGS="$CPPFLAGS $addcflags"
    fi

    dnl The function SSL_VersionRangeSet() is needed to enable TLS > 1.0
    AC_CHECK_LIB(nss3, SSL_VersionRangeSet,
     [
     AC_DEFINE(USE_NSS, 1, [if NSS is enabled])
     AC_SUBST(USE_NSS, [1])
     USE_NSS="yes"
     NSS_ENABLED=1
     ssl_msg="NSS"
     test nss != "$DEFAULT_SSL_BACKEND" || VALID_DEFAULT_SSL_BACKEND=yes
     ],
     [
       LDFLAGS="$CLEANLDFLAGS"
       LIBS="$CLEANLIBS"
       CPPFLAGS="$CLEANCPPFLAGS"
     ])

    if test "x$USE_NSS" = "xyes"; then
      AC_MSG_NOTICE([detected NSS version $version])

      dnl PK11_CreateManagedGenericObject() was introduced in NSS 3.34 because
      dnl PK11_DestroyGenericObject() does not release resources allocated by
      dnl PK11_CreateGenericObject() early enough.
      AC_CHECK_FUNC(PK11_CreateManagedGenericObject,
        [
          AC_DEFINE(HAVE_PK11_CREATEMANAGEDGENERICOBJECT, 1,
                    [if you have the PK11_CreateManagedGenericObject function])
        ])

      dnl needed when linking the curl tool without USE_EXPLICIT_LIB_DEPS
      NSS_LIBS=$addlib
      AC_SUBST([NSS_LIBS])

      dnl when shared libs were found in a path that the run-time
      dnl linker doesn't search through, we need to add it to
      dnl CURL_LIBRARY_PATH to prevent further configure tests to fail
      dnl due to this
      if test "x$cross_compiling" != "xyes"; then
        CURL_LIBRARY_PATH="$CURL_LIBRARY_PATH:$nssprefix/lib$libsuff"
        export CURL_LIBRARY_PATH
        AC_MSG_NOTICE([Added $nssprefix/lib$libsuff to CURL_LIBRARY_PATH])
      fi

    fi dnl NSS found

  fi dnl NSS not disabled

  test -z "$ssl_msg" || ssl_backends="${ssl_backends:+$ssl_backends, }$ssl_msg"
fi

case "x$OPENSSL_ENABLED$GNUTLS_ENABLED$NSS_ENABLED$MBEDTLS_ENABLED$WOLFSSL_ENABLED$WINSSL_ENABLED$SECURETRANSPORT_ENABLED$MESALINK_ENABLED$BEARSSL_ENABLED$AMISSL_ENABLED" in
x)
  AC_MSG_WARN([SSL disabled, you will not be able to use HTTPS, FTPS, NTLM and more.])
  AC_MSG_WARN([Use --with-ssl, --with-gnutls, --with-wolfssl, --with-mbedtls, --with-nss, --with-schannel, --with-secure-transport, --with-mesalink, --with-amissl or --with-bearssl to address this.])
  ;;
x1)
  # one SSL backend is enabled
  AC_SUBST(SSL_ENABLED)
  SSL_ENABLED="1"
  AC_MSG_NOTICE([built with one SSL backend])
  ;;
*)
  # more than one SSL backend is enabled
  AC_SUBST(SSL_ENABLED)
  SSL_ENABLED="1"
  AC_SUBST(CURL_WITH_MULTI_SSL)
  CURL_WITH_MULTI_SSL="1"
  AC_DEFINE(CURL_WITH_MULTI_SSL, 1, [built with multiple SSL backends])
  AC_MSG_NOTICE([built with multiple SSL backends])
  ;;
esac

if test -n "$ssl_backends"; then
  curl_ssl_msg="enabled ($ssl_backends)"
fi

if test no = "$VALID_DEFAULT_SSL_BACKEND"
then
  if test -n "$SSL_ENABLED"
  then
    AC_MSG_ERROR([Default SSL backend $DEFAULT_SSL_BACKEND not enabled!])
  else
    AC_MSG_ERROR([Default SSL backend requires SSL!])
  fi
elif test yes = "$VALID_DEFAULT_SSL_BACKEND"
then
  AC_DEFINE_UNQUOTED([CURL_DEFAULT_SSL_BACKEND], ["$DEFAULT_SSL_BACKEND"], [Default SSL backend])
fi

dnl **********************************************************************
dnl Check for the CA bundle
dnl **********************************************************************

if test -n "$check_for_ca_bundle"; then
  CURL_CHECK_CA_BUNDLE
fi

dnl **********************************************************************
dnl Check for libpsl
dnl **********************************************************************

AC_ARG_WITH(libpsl,
           AS_HELP_STRING([--without-libpsl],
           [disable support for libpsl cookie checking]),
           with_libpsl=$withval,
           with_libpsl=yes)
if test $with_libpsl != "no"; then
  AC_SEARCH_LIBS(psl_builtin, psl,
    [curl_psl_msg="enabled";
     AC_DEFINE([USE_LIBPSL], [1], [PSL support enabled])
     ],
    [curl_psl_msg="no      (libpsl not found)";
     AC_MSG_WARN([libpsl was not found])
     ]
  )
fi
AM_CONDITIONAL([USE_LIBPSL], [test "$curl_psl_msg" = "enabled"])

dnl **********************************************************************
dnl Check for libmetalink
dnl **********************************************************************

OPT_LIBMETALINK=no

AC_ARG_WITH(libmetalink,dnl
AC_HELP_STRING([--with-libmetalink=PATH],[where to look for libmetalink, PATH points to the installation root])
AC_HELP_STRING([--without-libmetalink], [disable libmetalink detection]),
  OPT_LIBMETALINK=$withval)

if test X"$OPT_LIBMETALINK" != Xno; then

  addld=""
  addlib=""
  addcflags=""
  version=""
  libmetalinklib=""

  PKGTEST="no"
  if test "x$OPT_LIBMETALINK" = "xyes"; then
    dnl this is with no partiular path given
    PKGTEST="yes"
    CURL_CHECK_PKGCONFIG(libmetalink)
  else
    dnl When particular path is given, set PKG_CONFIG_LIBDIR using the path.
    LIBMETALINK_PCDIR="$OPT_LIBMETALINK/lib/pkgconfig"
    AC_MSG_NOTICE([PKG_CONFIG_LIBDIR will be set to "$LIBMETALINK_PCDIR"])
    if test -f "$LIBMETALINK_PCDIR/libmetalink.pc"; then
      PKGTEST="yes"
    fi
    if test "$PKGTEST" = "yes"; then
      CURL_CHECK_PKGCONFIG(libmetalink, [$LIBMETALINK_PCDIR])
    fi
  fi
  if test "$PKGTEST" = "yes" && test "$PKGCONFIG" != "no"; then
    addlib=`CURL_EXPORT_PCDIR([$LIBMETALINK_PCDIR]) dnl
      $PKGCONFIG --libs-only-l libmetalink`
    addld=`CURL_EXPORT_PCDIR([$LIBMETALINK_PCDIR]) dnl
      $PKGCONFIG --libs-only-L libmetalink`
    addcflags=`CURL_EXPORT_PCDIR([$LIBMETALINK_PCDIR]) dnl
      $PKGCONFIG --cflags-only-I libmetalink`
    version=`CURL_EXPORT_PCDIR([$LIBMETALINK_PCDIR]) dnl
      $PKGCONFIG --modversion libmetalink`
    libmetalinklib=`echo $addld | $SED -e 's/-L//'`
  fi
  if test -n "$addlib"; then

    clean_CPPFLAGS="$CPPFLAGS"
    clean_LDFLAGS="$LDFLAGS"
    clean_LIBS="$LIBS"
    CPPFLAGS="$clean_CPPFLAGS $addcflags"
    LDFLAGS="$clean_LDFLAGS $addld"
    LIBS="$addlib $clean_LIBS"
    AC_MSG_CHECKING([if libmetalink is recent enough])
    AC_LINK_IFELSE([
      AC_LANG_PROGRAM([[
#       include <metalink/metalink.h>
      ]],[[
        if(0 != metalink_strerror(0)) /* added in 0.1.0 */
          return 1;
      ]])
    ],[
      AC_MSG_RESULT([yes ($version)])
      want_metalink="yes"
    ],[
      AC_MSG_RESULT([no ($version)])
      AC_MSG_NOTICE([libmetalink library defective or too old])
      want_metalink="no"
    ])
    if test "x$OPENSSL_ENABLED" != "x1" -a "x$USE_WINDOWS_SSPI" != "x1" \
        -a "x$GNUTLS_ENABLED" != "x1" -a "x$NSS_ENABLED" != "x1" \
        -a "x$SECURETRANSPORT_ENABLED" != "x1"; then
      AC_MSG_WARN([metalink support requires a compatible SSL/TLS backend])
      want_metalink="no"
    fi
    CPPFLAGS="$clean_CPPFLAGS"
    LDFLAGS="$clean_LDFLAGS"
    LIBS="$clean_LIBS"
    if test "$want_metalink" = "yes"; then
      dnl finally libmetalink will be used
      AC_DEFINE(USE_METALINK, 1, [Define to enable metalink support])
      LIBMETALINK_LIBS=$addlib
      LIBMETALINK_LDFLAGS=$addld
      LIBMETALINK_CPPFLAGS=$addcflags
      AC_SUBST([LIBMETALINK_LIBS])
      AC_SUBST([LIBMETALINK_LDFLAGS])
      AC_SUBST([LIBMETALINK_CPPFLAGS])
      curl_mtlnk_msg="enabled"
    fi

  fi
fi

dnl **********************************************************************
dnl Check for the presence of LIBSSH2 libraries and headers
dnl **********************************************************************

dnl Default to compiler & linker defaults for LIBSSH2 files & libraries.
OPT_LIBSSH2=off
AC_ARG_WITH(libssh2,dnl
AC_HELP_STRING([--with-libssh2=PATH],[Where to look for libssh2, PATH points to the libssh2 installation; when possible, set the PKG_CONFIG_PATH environment variable instead of using this option])
AC_HELP_STRING([--with-libssh2], [enable libssh2]),
  OPT_LIBSSH2=$withval, OPT_LIBSSH2=no)


OPT_LIBSSH=off
AC_ARG_WITH(libssh,dnl
AC_HELP_STRING([--with-libssh=PATH],[Where to look for libssh, PATH points to the libssh installation; when possible, set the PKG_CONFIG_PATH environment variable instead of using this option])
AC_HELP_STRING([--with-libssh], [enable libssh]),
  OPT_LIBSSH=$withval, OPT_LIBSSH=no)

OPT_WOLFSSH=off
AC_ARG_WITH(wolfssh,dnl
AC_HELP_STRING([--with-wolfssh=PATH],[Where to look for wolfssh, PATH points to the wolfSSH installation; when possible, set the PKG_CONFIG_PATH environment variable instead of using this option])
AC_HELP_STRING([--with-wolfssh], [enable wolfssh]),
  OPT_WOLFSSH=$withval, OPT_WOLFSSH=no)

if test X"$OPT_LIBSSH2" != Xno; then
  dnl backup the pre-libssh2 variables
  CLEANLDFLAGS="$LDFLAGS"
  CLEANCPPFLAGS="$CPPFLAGS"
  CLEANLIBS="$LIBS"

  case "$OPT_LIBSSH2" in
  yes)
    dnl --with-libssh2 (without path) used
    CURL_CHECK_PKGCONFIG(libssh2)

    if test "$PKGCONFIG" != "no" ; then
      LIB_SSH2=`$PKGCONFIG --libs libssh2`
      LD_SSH2=`$PKGCONFIG --libs-only-L libssh2`
      CPP_SSH2=`$PKGCONFIG --cflags-only-I libssh2`
      version=`$PKGCONFIG --modversion libssh2`
      DIR_SSH2=`echo $LD_SSH2 | $SED -e 's/-L//'`
    fi

    ;;
  off)
    dnl no --with-libssh2 option given, just check default places
    ;;
  *)
    dnl use the given --with-libssh2 spot
    PREFIX_SSH2=$OPT_LIBSSH2
    ;;
  esac

  dnl if given with a prefix, we set -L and -I based on that
  if test -n "$PREFIX_SSH2"; then
    LIB_SSH2="-lssh2"
    LD_SSH2=-L${PREFIX_SSH2}/lib$libsuff
    CPP_SSH2=-I${PREFIX_SSH2}/include
    DIR_SSH2=${PREFIX_SSH2}/lib$libsuff
  fi

  LDFLAGS="$LDFLAGS $LD_SSH2"
  CPPFLAGS="$CPPFLAGS $CPP_SSH2"
  LIBS="$LIB_SSH2 $LIBS"

  AC_CHECK_LIB(ssh2, libssh2_channel_open_ex)

  AC_CHECK_HEADERS(libssh2.h,
    curl_ssh_msg="enabled (libSSH2)"
    LIBSSH2_ENABLED=1
    AC_DEFINE(USE_LIBSSH2, 1, [if libSSH2 is in use])
    AC_SUBST(USE_LIBSSH2, [1])
  )

  if test X"$OPT_LIBSSH2" != Xoff &&
     test "$LIBSSH2_ENABLED" != "1"; then
    AC_MSG_ERROR([libSSH2 libs and/or directories were not found where specified!])
  fi

  if test "$LIBSSH2_ENABLED" = "1"; then
    if test -n "$DIR_SSH2"; then
       dnl when the libssh2 shared libs were found in a path that the run-time
       dnl linker doesn't search through, we need to add it to CURL_LIBRARY_PATH
       dnl to prevent further configure tests to fail due to this

       if test "x$cross_compiling" != "xyes"; then
         CURL_LIBRARY_PATH="$CURL_LIBRARY_PATH:$DIR_SSH2"
         export CURL_LIBRARY_PATH
         AC_MSG_NOTICE([Added $DIR_SSH2 to CURL_LIBRARY_PATH])
       fi
    fi
  else
    dnl no libssh2, revert back to clean variables
    LDFLAGS=$CLEANLDFLAGS
    CPPFLAGS=$CLEANCPPFLAGS
    LIBS=$CLEANLIBS
  fi
elif test X"$OPT_LIBSSH" != Xno; then
  dnl backup the pre-libssh variables
  CLEANLDFLAGS="$LDFLAGS"
  CLEANCPPFLAGS="$CPPFLAGS"
  CLEANLIBS="$LIBS"

  case "$OPT_LIBSSH" in
  yes)
    dnl --with-libssh (without path) used
    CURL_CHECK_PKGCONFIG(libssh)

    if test "$PKGCONFIG" != "no" ; then
      LIB_SSH=`$PKGCONFIG --libs-only-l libssh`
      LD_SSH=`$PKGCONFIG --libs-only-L libssh`
      CPP_SSH=`$PKGCONFIG --cflags-only-I libssh`
      version=`$PKGCONFIG --modversion libssh`
      DIR_SSH=`echo $LD_SSH | $SED -e 's/-L//'`
    fi

    ;;
  off)
    dnl no --with-libssh option given, just check default places
    ;;
  *)
    dnl use the given --with-libssh spot
    PREFIX_SSH=$OPT_LIBSSH
    ;;
  esac

  dnl if given with a prefix, we set -L and -I based on that
  if test -n "$PREFIX_SSH"; then
    LIB_SSH="-lssh"
    LD_SSH=-L${PREFIX_SSH}/lib$libsuff
    CPP_SSH=-I${PREFIX_SSH}/include
    DIR_SSH=${PREFIX_SSH}/lib$libsuff
  fi

  LDFLAGS="$LDFLAGS $LD_SSH"
  CPPFLAGS="$CPPFLAGS $CPP_SSH"
  LIBS="$LIB_SSH $LIBS"

  AC_CHECK_LIB(ssh, ssh_new)

  AC_CHECK_HEADERS(libssh/libssh.h,
    curl_ssh_msg="enabled (libSSH)"
    LIBSSH_ENABLED=1
    AC_DEFINE(USE_LIBSSH, 1, [if libSSH is in use])
    AC_SUBST(USE_LIBSSH, [1])
  )

  if test X"$OPT_LIBSSH" != Xoff &&
     test "$LIBSSH_ENABLED" != "1"; then
    AC_MSG_ERROR([libSSH libs and/or directories were not found where specified!])
  fi

  if test "$LIBSSH_ENABLED" = "1"; then
    if test -n "$DIR_SSH"; then
       dnl when the libssh shared libs were found in a path that the run-time
       dnl linker doesn't search through, we need to add it to CURL_LIBRARY_PATH
       dnl to prevent further configure tests to fail due to this

       if test "x$cross_compiling" != "xyes"; then
         CURL_LIBRARY_PATH="$CURL_LIBRARY_PATH:$DIR_SSH"
         export CURL_LIBRARY_PATH
         AC_MSG_NOTICE([Added $DIR_SSH to CURL_LIBRARY_PATH])
       fi
    fi
  else
    dnl no libssh, revert back to clean variables
    LDFLAGS=$CLEANLDFLAGS
    CPPFLAGS=$CLEANCPPFLAGS
    LIBS=$CLEANLIBS
  fi
elif test X"$OPT_WOLFSSH" != Xno; then
  dnl backup the pre-wolfssh variables
  CLEANLDFLAGS="$LDFLAGS"
  CLEANCPPFLAGS="$CPPFLAGS"
  CLEANLIBS="$LIBS"


  if test "$OPT_WOLFSSH" != yes; then
     WOLFCONFIG="$OPT_WOLFSSH/bin/wolfssh-config"
     LDFLAGS="$LDFLAGS `$WOLFCONFIG --libs`"
     CPPFLAGS="$CPPFLAGS `$WOLFCONFIG --cflags`"
  fi

  AC_CHECK_LIB(wolfssh, wolfSSH_Init)

  AC_CHECK_HEADERS(wolfssh/ssh.h,
    curl_ssh_msg="enabled (wolfSSH)"
    WOLFSSH_ENABLED=1
    AC_DEFINE(USE_WOLFSSH, 1, [if wolfSSH is in use])
    AC_SUBST(USE_WOLFSSH, [1])
  )

fi

dnl **********************************************************************
dnl Check for the presence of LIBRTMP libraries and headers
dnl **********************************************************************

dnl Default to compiler & linker defaults for LIBRTMP files & libraries.
OPT_LIBRTMP=off
AC_ARG_WITH(librtmp,dnl
AC_HELP_STRING([--with-librtmp=PATH],[Where to look for librtmp, PATH points to the LIBRTMP installation; when possible, set the PKG_CONFIG_PATH environment variable instead of using this option])
AC_HELP_STRING([--without-librtmp], [disable LIBRTMP]),
  OPT_LIBRTMP=$withval)

if test X"$OPT_LIBRTMP" != Xno; then
  dnl backup the pre-librtmp variables
  CLEANLDFLAGS="$LDFLAGS"
  CLEANCPPFLAGS="$CPPFLAGS"
  CLEANLIBS="$LIBS"

  case "$OPT_LIBRTMP" in
  yes)
    dnl --with-librtmp (without path) used
    CURL_CHECK_PKGCONFIG(librtmp)

    if test "$PKGCONFIG" != "no" ; then
      LIB_RTMP=`$PKGCONFIG --libs-only-l librtmp`
      LD_RTMP=`$PKGCONFIG --libs-only-L librtmp`
      CPP_RTMP=`$PKGCONFIG --cflags-only-I librtmp`
      version=`$PKGCONFIG --modversion librtmp`
      DIR_RTMP=`echo $LD_RTMP | $SED -e 's/-L//'`
    else
      dnl To avoid link errors, we do not allow --librtmp without
      dnl a pkgconfig file
      AC_MSG_ERROR([--librtmp was specified but could not find librtmp pkgconfig file.])
    fi

    ;;
  off)
    dnl no --with-librtmp option given, just check default places
    LIB_RTMP="-lrtmp"
    ;;
  *)
    dnl use the given --with-librtmp spot
    LIB_RTMP="-lrtmp"
    PREFIX_RTMP=$OPT_LIBRTMP
    ;;
  esac

  dnl if given with a prefix, we set -L and -I based on that
  if test -n "$PREFIX_RTMP"; then
    LD_RTMP=-L${PREFIX_RTMP}/lib$libsuff
    CPP_RTMP=-I${PREFIX_RTMP}/include
    DIR_RTMP=${PREFIX_RTMP}/lib$libsuff
  fi

  LDFLAGS="$LDFLAGS $LD_RTMP"
  CPPFLAGS="$CPPFLAGS $CPP_RTMP"
  LIBS="$LIB_RTMP $LIBS"

  AC_CHECK_LIB(rtmp, RTMP_Init,
    [
     AC_CHECK_HEADERS(librtmp/rtmp.h,
        curl_rtmp_msg="enabled (librtmp)"
        LIBRTMP_ENABLED=1
        AC_DEFINE(USE_LIBRTMP, 1, [if librtmp is in use])
        AC_SUBST(USE_LIBRTMP, [1])
     )
    ],
      dnl not found, revert back to clean variables
      LDFLAGS=$CLEANLDFLAGS
      CPPFLAGS=$CLEANCPPFLAGS
      LIBS=$CLEANLIBS
  )

  if test X"$OPT_LIBRTMP" != Xoff &&
     test "$LIBRTMP_ENABLED" != "1"; then
    AC_MSG_ERROR([librtmp libs and/or directories were not found where specified!])
  fi

fi

dnl **********************************************************************
dnl Check for linker switch for versioned symbols
dnl **********************************************************************

versioned_symbols_flavour=
AC_MSG_CHECKING([whether versioned symbols are wanted])
AC_ARG_ENABLE(versioned-symbols,
AC_HELP_STRING([--enable-versioned-symbols], [Enable versioned symbols in shared library])
AC_HELP_STRING([--disable-versioned-symbols], [Disable versioned symbols in shared library]),
[ case "$enableval" in
  yes) AC_MSG_RESULT(yes)
    AC_MSG_CHECKING([if libraries can be versioned])
    GLD=`$LD --help < /dev/null 2>/dev/null | grep version-script`
    if test -z "$GLD"; then
        AC_MSG_RESULT(no)
        AC_MSG_WARN([You need an ld version supporting the --version-script option])
    else
        AC_MSG_RESULT(yes)
        if test "x$CURL_WITH_MULTI_SSL" = "x1"; then
          versioned_symbols_flavour="MULTISSL_"
        elif test "x$OPENSSL_ENABLED" = "x1"; then
          versioned_symbols_flavour="OPENSSL_"
        elif test "x$GNUTLS_ENABLED" = "x1"; then
          versioned_symbols_flavour="GNUTLS_"
        elif test "x$NSS_ENABLED" = "x1"; then
          versioned_symbols_flavour="NSS_"
        elif test "x$WOLFSSL_ENABLED" = "x1"; then
          versioned_symbols_flavour="WOLFSSL_"
        elif test "x$WINSSL_ENABLED" = "x1"; then
          versioned_symbols_flavour="SCHANNEL_"
        elif test "x$SECURETRANSPORT_ENABLED" = "x1"; then
          versioned_symbols_flavour="SECURE_TRANSPORT_"
        else
          versioned_symbols_flavour=""
        fi
        versioned_symbols="yes"
    fi
    ;;

  *)   AC_MSG_RESULT(no)
    ;;
  esac
], [
AC_MSG_RESULT(no)
]
)

AC_SUBST([CURL_LT_SHLIB_VERSIONED_FLAVOUR],
  ["$versioned_symbols_flavour"])
AM_CONDITIONAL([CURL_LT_SHLIB_USE_VERSIONED_SYMBOLS],
  [test "x$versioned_symbols" = 'xyes'])

dnl -------------------------------------------------
dnl check winidn option before other IDN libraries
dnl -------------------------------------------------

AC_MSG_CHECKING([whether to enable Windows native IDN (Windows native builds only)])
OPT_WINIDN="default"
AC_ARG_WITH(winidn,
AC_HELP_STRING([--with-winidn=PATH],[enable Windows native IDN])
AC_HELP_STRING([--without-winidn], [disable Windows native IDN]),
  OPT_WINIDN=$withval)
case "$OPT_WINIDN" in
  no|default)
    dnl --without-winidn option used or configure option not specified
    want_winidn="no"
    AC_MSG_RESULT([no])
    ;;
  yes)
    dnl --with-winidn option used without path
    want_winidn="yes"
    want_winidn_path="default"
    AC_MSG_RESULT([yes])
    ;;
  *)
    dnl --with-winidn option used with path
    want_winidn="yes"
    want_winidn_path="$withval"
    AC_MSG_RESULT([yes ($withval)])
    ;;
esac

if test "$want_winidn" = "yes"; then
  dnl winidn library support has been requested
  clean_CPPFLAGS="$CPPFLAGS"
  clean_LDFLAGS="$LDFLAGS"
  clean_LIBS="$LIBS"
  WINIDN_LIBS="-lnormaliz"
  WINIDN_CPPFLAGS="-DWINVER=0x0600"
  #
  if test "$want_winidn_path" != "default"; then
    dnl path has been specified
    dnl pkg-config not available or provides no info
    WINIDN_LDFLAGS="-L$want_winidn_path/lib$libsuff"
    WINIDN_CPPFLAGS="-I$want_winidn_path/include"
    WINIDN_DIR="$want_winidn_path/lib$libsuff"
  fi
  #
  CPPFLAGS="$CPPFLAGS $WINIDN_CPPFLAGS"
  LDFLAGS="$LDFLAGS $WINIDN_LDFLAGS"
  LIBS="$WINIDN_LIBS $LIBS"
  #
  AC_MSG_CHECKING([if IdnToUnicode can be linked])
  AC_LINK_IFELSE([
    AC_LANG_PROGRAM([[
      #include <windows.h>
    ]],[[
      IdnToUnicode(0, NULL, 0, NULL, 0);
    ]])
  ],[
    AC_MSG_RESULT([yes])
    tst_links_winidn="yes"
  ],[
    AC_MSG_RESULT([no])
    tst_links_winidn="no"
  ])
  #
  if test "$tst_links_winidn" = "yes"; then
    AC_DEFINE(USE_WIN32_IDN, 1, [Define to 1 if you have the `normaliz' (WinIDN) library (-lnormaliz).])
    AC_DEFINE(WANT_IDN_PROTOTYPES, 1, [Define to 1 to provide own prototypes.])
    AC_SUBST([IDN_ENABLED], [1])
    curl_idn_msg="enabled (Windows-native)"
  else
    AC_MSG_WARN([Cannot find libraries for IDN support: IDN disabled])
    CPPFLAGS="$clean_CPPFLAGS"
    LDFLAGS="$clean_LDFLAGS"
    LIBS="$clean_LIBS"
  fi
fi

dnl **********************************************************************
dnl Check for the presence of IDN libraries and headers
dnl **********************************************************************

AC_MSG_CHECKING([whether to build with libidn2])
OPT_IDN="default"
AC_ARG_WITH(libidn2,
AC_HELP_STRING([--with-libidn2=PATH],[Enable libidn2 usage])
AC_HELP_STRING([--without-libidn2],[Disable libidn2 usage]),
  [OPT_IDN=$withval])
case "$OPT_IDN" in
  no)
    dnl --without-libidn2 option used
    want_idn="no"
    AC_MSG_RESULT([no])
    ;;
  default)
    dnl configure option not specified
    want_idn="yes"
    want_idn_path="default"
    AC_MSG_RESULT([(assumed) yes])
    ;;
  yes)
    dnl --with-libidn2 option used without path
    want_idn="yes"
    want_idn_path="default"
    AC_MSG_RESULT([yes])
    ;;
  *)
    dnl --with-libidn2 option used with path
    want_idn="yes"
    want_idn_path="$withval"
    AC_MSG_RESULT([yes ($withval)])
    ;;
esac

if test "$want_idn" = "yes"; then
  dnl idn library support has been requested
  clean_CPPFLAGS="$CPPFLAGS"
  clean_LDFLAGS="$LDFLAGS"
  clean_LIBS="$LIBS"
  PKGCONFIG="no"
  #
  if test "$want_idn_path" != "default"; then
    dnl path has been specified
    IDN_PCDIR="$want_idn_path/lib$libsuff/pkgconfig"
    CURL_CHECK_PKGCONFIG(libidn2, [$IDN_PCDIR])
    if test "$PKGCONFIG" != "no"; then
      IDN_LIBS=`CURL_EXPORT_PCDIR([$IDN_PCDIR]) dnl
        $PKGCONFIG --libs-only-l libidn2 2>/dev/null`
      IDN_LDFLAGS=`CURL_EXPORT_PCDIR([$IDN_PCDIR]) dnl
        $PKGCONFIG --libs-only-L libidn2 2>/dev/null`
      IDN_CPPFLAGS=`CURL_EXPORT_PCDIR([$IDN_PCDIR]) dnl
        $PKGCONFIG --cflags-only-I libidn2 2>/dev/null`
      IDN_DIR=`echo $IDN_LDFLAGS | $SED -e 's/-L//'`
    else
      dnl pkg-config not available or provides no info
      IDN_LIBS="-lidn2"
      IDN_LDFLAGS="-L$want_idn_path/lib$libsuff"
      IDN_CPPFLAGS="-I$want_idn_path/include"
      IDN_DIR="$want_idn_path/lib$libsuff"
    fi
  else
    dnl path not specified
    CURL_CHECK_PKGCONFIG(libidn2)
    if test "$PKGCONFIG" != "no"; then
      IDN_LIBS=`$PKGCONFIG --libs-only-l libidn2 2>/dev/null`
      IDN_LDFLAGS=`$PKGCONFIG --libs-only-L libidn2 2>/dev/null`
      IDN_CPPFLAGS=`$PKGCONFIG --cflags-only-I libidn2 2>/dev/null`
      IDN_DIR=`echo $IDN_LDFLAGS | $SED -e 's/-L//'`
    else
      dnl pkg-config not available or provides no info
      IDN_LIBS="-lidn2"
    fi
  fi
  #
  if test "$PKGCONFIG" != "no"; then
    AC_MSG_NOTICE([pkg-config: IDN_LIBS: "$IDN_LIBS"])
    AC_MSG_NOTICE([pkg-config: IDN_LDFLAGS: "$IDN_LDFLAGS"])
    AC_MSG_NOTICE([pkg-config: IDN_CPPFLAGS: "$IDN_CPPFLAGS"])
    AC_MSG_NOTICE([pkg-config: IDN_DIR: "$IDN_DIR"])
  else
    AC_MSG_NOTICE([IDN_LIBS: "$IDN_LIBS"])
    AC_MSG_NOTICE([IDN_LDFLAGS: "$IDN_LDFLAGS"])
    AC_MSG_NOTICE([IDN_CPPFLAGS: "$IDN_CPPFLAGS"])
    AC_MSG_NOTICE([IDN_DIR: "$IDN_DIR"])
  fi
  #
  CPPFLAGS="$CPPFLAGS $IDN_CPPFLAGS"
  LDFLAGS="$LDFLAGS $IDN_LDFLAGS"
  LIBS="$IDN_LIBS $LIBS"
  #
  AC_MSG_CHECKING([if idn2_lookup_ul can be linked])
  AC_LINK_IFELSE([
    AC_LANG_FUNC_LINK_TRY([idn2_lookup_ul])
  ],[
    AC_MSG_RESULT([yes])
    tst_links_libidn="yes"
  ],[
    AC_MSG_RESULT([no])
    tst_links_libidn="no"
  ])
  #
  AC_CHECK_HEADERS( idn2.h )

  if test "$tst_links_libidn" = "yes"; then
    AC_DEFINE(HAVE_LIBIDN2, 1, [Define to 1 if you have the `idn2' library (-lidn2).])
    dnl different versions of libidn have different setups of these:

    AC_SUBST([IDN_ENABLED], [1])
    curl_idn_msg="enabled (libidn2)"
    if test -n "$IDN_DIR" -a "x$cross_compiling" != "xyes"; then
      CURL_LIBRARY_PATH="$CURL_LIBRARY_PATH:$IDN_DIR"
      export CURL_LIBRARY_PATH
      AC_MSG_NOTICE([Added $IDN_DIR to CURL_LIBRARY_PATH])
    fi
  else
    AC_MSG_WARN([Cannot find libraries for IDN support: IDN disabled])
    CPPFLAGS="$clean_CPPFLAGS"
    LDFLAGS="$clean_LDFLAGS"
    LIBS="$clean_LIBS"
  fi
fi


dnl Let's hope this split URL remains working:
dnl https://www15.software.ibm.com/doc_link/en_US/a_doc_lib/aixprggd/ \
dnl genprogc/thread_quick_ref.htm


dnl **********************************************************************
dnl Check for nghttp2
dnl **********************************************************************

OPT_H2="yes"

if test "x$disable_http" = "xyes"; then
  # without HTTP, nghttp2 is no use
  OPT_H2="no"
fi

AC_ARG_WITH(nghttp2,
AC_HELP_STRING([--with-nghttp2=PATH],[Enable nghttp2 usage])
AC_HELP_STRING([--without-nghttp2],[Disable nghttp2 usage]),
  [OPT_H2=$withval])
case "$OPT_H2" in
  no)
    dnl --without-nghttp2 option used
    want_h2="no"
    ;;
  yes)
    dnl --with-nghttp2 option used without path
    want_h2="default"
    want_h2_path=""
    ;;
  *)
    dnl --with-nghttp2 option used with path
    want_h2="yes"
    want_h2_path="$withval/lib/pkgconfig"
    ;;
esac

curl_h2_msg="disabled (--with-nghttp2)"
if test X"$want_h2" != Xno; then
  dnl backup the pre-nghttp2 variables
  CLEANLDFLAGS="$LDFLAGS"
  CLEANCPPFLAGS="$CPPFLAGS"
  CLEANLIBS="$LIBS"

  CURL_CHECK_PKGCONFIG(libnghttp2, $want_h2_path)

  if test "$PKGCONFIG" != "no" ; then
    LIB_H2=`CURL_EXPORT_PCDIR([$want_h2_path])
      $PKGCONFIG --libs-only-l libnghttp2`
    AC_MSG_NOTICE([-l is $LIB_H2])

    CPP_H2=`CURL_EXPORT_PCDIR([$want_h2_path]) dnl
      $PKGCONFIG --cflags-only-I libnghttp2`
    AC_MSG_NOTICE([-I is $CPP_H2])

    LD_H2=`CURL_EXPORT_PCDIR([$want_h2_path])
      $PKGCONFIG --libs-only-L libnghttp2`
    AC_MSG_NOTICE([-L is $LD_H2])

    LDFLAGS="$LDFLAGS $LD_H2"
    CPPFLAGS="$CPPFLAGS $CPP_H2"
    LIBS="$LIB_H2 $LIBS"

    # use nghttp2_session_set_local_window_size to require nghttp2
    # >= 1.12.0
    AC_CHECK_LIB(nghttp2, nghttp2_session_set_local_window_size,
      [
       AC_CHECK_HEADERS(nghttp2/nghttp2.h,
          curl_h2_msg="enabled (nghttp2)"
          NGHTTP2_ENABLED=1
          AC_DEFINE(USE_NGHTTP2, 1, [if nghttp2 is in use])
          AC_SUBST(USE_NGHTTP2, [1])
       )
      ],
        dnl not found, revert back to clean variables
        LDFLAGS=$CLEANLDFLAGS
        CPPFLAGS=$CLEANCPPFLAGS
        LIBS=$CLEANLIBS
    )

  else
    dnl no nghttp2 pkg-config found, deal with it
    if test X"$want_h2" != Xdefault; then
      dnl To avoid link errors, we do not allow --with-nghttp2 without
      dnl a pkgconfig file
      AC_MSG_ERROR([--with-nghttp2 was specified but could not find libnghttp2 pkg-config file.])
    fi
  fi

fi

dnl **********************************************************************
dnl Check for ngtcp2 (QUIC)
dnl **********************************************************************

OPT_TCP2="yes"
curl_h3_msg="disabled (--with-ngtcp2, --with-quiche)"

if test "x$disable_http" = "xyes"; then
  # without HTTP, ngtcp2 is no use
  OPT_TCP2="no"
fi

AC_ARG_WITH(ngtcp2,
AC_HELP_STRING([--with-ngtcp2=PATH],[Enable ngtcp2 usage])
AC_HELP_STRING([--without-ngtcp2],[Disable ngtcp2 usage]),
  [OPT_TCP2=$withval])
case "$OPT_TCP2" in
  no)
    dnl --without-ngtcp2 option used
    want_tcp2="no"
    ;;
  yes)
    dnl --with-ngtcp2 option used without path
    want_tcp2="default"
    want_tcp2_path=""
    ;;
  *)
    dnl --with-ngtcp2 option used with path
    want_tcp2="yes"
    want_tcp2_path="$withval/lib/pkgconfig"
    ;;
esac

curl_tcp2_msg="disabled (--with-ngtcp2)"
if test X"$want_tcp2" != Xno; then
  dnl backup the pre-ngtcp2 variables
  CLEANLDFLAGS="$LDFLAGS"
  CLEANCPPFLAGS="$CPPFLAGS"
  CLEANLIBS="$LIBS"

  CURL_CHECK_PKGCONFIG(libngtcp2, $want_tcp2_path)

  if test "$PKGCONFIG" != "no" ; then
    LIB_TCP2=`CURL_EXPORT_PCDIR([$want_tcp2_path])
      $PKGCONFIG --libs-only-l libngtcp2`
    AC_MSG_NOTICE([-l is $LIB_TCP2])

    CPP_TCP2=`CURL_EXPORT_PCDIR([$want_tcp2_path]) dnl
      $PKGCONFIG --cflags-only-I libngtcp2`
    AC_MSG_NOTICE([-I is $CPP_TCP2])

    LD_TCP2=`CURL_EXPORT_PCDIR([$want_tcp2_path])
      $PKGCONFIG --libs-only-L libngtcp2`
    AC_MSG_NOTICE([-L is $LD_TCP2])

    LDFLAGS="$LDFLAGS $LD_TCP2"
    CPPFLAGS="$CPPFLAGS $CPP_TCP2"
    LIBS="$LIB_TCP2 $LIBS"

    if test "x$cross_compiling" != "xyes"; then
      DIR_TCP2=`echo $LD_TCP2 | $SED -e 's/-L//'`
    fi
    AC_CHECK_LIB(ngtcp2, ngtcp2_conn_client_new,
      [
       AC_CHECK_HEADERS(ngtcp2/ngtcp2.h,
          NGTCP2_ENABLED=1
          AC_DEFINE(USE_NGTCP2, 1, [if ngtcp2 is in use])
          AC_SUBST(USE_NGTCP2, [1])
          CURL_LIBRARY_PATH="$CURL_LIBRARY_PATH:$DIR_TCP2"
          export CURL_LIBRARY_PATH
          AC_MSG_NOTICE([Added $DIR_TCP2 to CURL_LIBRARY_PATH])
       )
      ],
        dnl not found, revert back to clean variables
        LDFLAGS=$CLEANLDFLAGS
        CPPFLAGS=$CLEANCPPFLAGS
        LIBS=$CLEANLIBS
    )

  else
    dnl no ngtcp2 pkg-config found, deal with it
    if test X"$want_tcp2" != Xdefault; then
      dnl To avoid link errors, we do not allow --with-ngtcp2 without
      dnl a pkgconfig file
      AC_MSG_ERROR([--with-ngtcp2 was specified but could not find ngtcp2 pkg-config file.])
    fi
  fi

fi

if test "x$NGTCP2_ENABLED" = "x1"; then
  dnl backup the pre-ngtcp2_crypto_openssl variables
  CLEANLDFLAGS="$LDFLAGS"
  CLEANCPPFLAGS="$CPPFLAGS"
  CLEANLIBS="$LIBS"

  CURL_CHECK_PKGCONFIG(libngtcp2_crypto_openssl, $want_tcp2_path)

  if test "$PKGCONFIG" != "no" ; then
    LIB_NGTCP2_CRYPTO_OPENSSL=`CURL_EXPORT_PCDIR([$want_tcp2_path])
      $PKGCONFIG --libs-only-l libngtcp2_crypto_openssl`
    AC_MSG_NOTICE([-l is $LIB_NGTCP2_CRYPTO_OPENSSL])

    CPP_NGTCP2_CRYPTO_OPENSSL=`CURL_EXPORT_PCDIR([$want_tcp2_path]) dnl
      $PKGCONFIG --cflags-only-I libngtcp2_crypto_openssl`
    AC_MSG_NOTICE([-I is $CPP_NGTCP2_CRYPTO_OPENSSL])

    LD_NGTCP2_CRYPTO_OPENSSL=`CURL_EXPORT_PCDIR([$want_tcp2_path])
      $PKGCONFIG --libs-only-L libngtcp2_crypto_openssl`
    AC_MSG_NOTICE([-L is $LD_NGTCP2_CRYPTO_OPENSSL])

    LDFLAGS="$LDFLAGS $LD_NGTCP2_CRYPTO_OPENSSL"
    CPPFLAGS="$CPPFLAGS $CPP_NGTCP2_CRYPTO_OPENSSL"
    LIBS="$LIB_NGTCP2_CRYPTO_OPENSSL $LIBS"

    if test "x$cross_compiling" != "xyes"; then
      DIR_NGTCP2_CRYPTO_OPENSSL=`echo $LD_NGTCP2_CRYPTO_OPENSSL | $SED -e 's/-L//'`
    fi
    AC_CHECK_LIB(ngtcp2_crypto_openssl, ngtcp2_crypto_ctx_initial,
      [
       AC_CHECK_HEADERS(ngtcp2/ngtcp2_crypto.h,
          NGTCP2_ENABLED=1
          AC_DEFINE(USE_NGTCP2_CRYPTO_OPENSSL, 1, [if ngtcp2_crypto_openssl is in use])
          AC_SUBST(USE_NGTCP2_CRYPTO_OPENSSL, [1])
          CURL_LIBRARY_PATH="$CURL_LIBRARY_PATH:$DIR_NGTCP2_CRYPTO_OPENSSL"
          export CURL_LIBRARY_PATH
          AC_MSG_NOTICE([Added $DIR_NGTCP2_CRYPTO_OPENSSL to CURL_LIBRARY_PATH])
       )
      ],
        dnl not found, revert back to clean variables
        LDFLAGS=$CLEANLDFLAGS
        CPPFLAGS=$CLEANCPPFLAGS
        LIBS=$CLEANLIBS
    )

  else
    dnl no ngtcp2_crypto_openssl pkg-config found, deal with it
    if test X"$want_tcp2" != Xdefault; then
      dnl To avoid link errors, we do not allow --with-ngtcp2 without
      dnl a pkgconfig file
      AC_MSG_ERROR([--with-ngtcp2 was specified but could not find ngtcp2_crypto_openssl pkg-config file.])
    fi
  fi
fi

dnl **********************************************************************
dnl Check for nghttp3 (HTTP/3 with ngtcp2)
dnl **********************************************************************

OPT_NGHTTP3="yes"

if test "x$NGTCP2_ENABLED" = "x"; then
  # without ngtcp2, nghttp3 is of no use for us
  OPT_NGHTTP3="no"
fi

AC_ARG_WITH(nghttp3,
AC_HELP_STRING([--with-nghttp3=PATH],[Enable nghttp3 usage])
AC_HELP_STRING([--without-nghttp3],[Disable nghttp3 usage]),
  [OPT_NGHTTP3=$withval])
case "$OPT_NGHTTP3" in
  no)
    dnl --without-nghttp3 option used
    want_nghttp3="no"
    ;;
  yes)
    dnl --with-nghttp3 option used without path
    want_nghttp3="default"
    want_nghttp3_path=""
    ;;
  *)
    dnl --with-nghttp3 option used with path
    want_nghttp3="yes"
    want_nghttp3_path="$withval/lib/pkgconfig"
    ;;
esac

curl_http3_msg="disabled (--with-nghttp3)"
if test X"$want_nghttp3" != Xno; then
  dnl backup the pre-nghttp3 variables
  CLEANLDFLAGS="$LDFLAGS"
  CLEANCPPFLAGS="$CPPFLAGS"
  CLEANLIBS="$LIBS"

  CURL_CHECK_PKGCONFIG(libnghttp3, $want_nghttp3_path)

  if test "$PKGCONFIG" != "no" ; then
    LIB_NGHTTP3=`CURL_EXPORT_PCDIR([$want_nghttp3_path])
      $PKGCONFIG --libs-only-l libnghttp3`
    AC_MSG_NOTICE([-l is $LIB_NGHTTP3])

    CPP_NGHTTP3=`CURL_EXPORT_PCDIR([$want_nghttp3_path]) dnl
      $PKGCONFIG --cflags-only-I libnghttp3`
    AC_MSG_NOTICE([-I is $CPP_NGHTTP3])

    LD_NGHTTP3=`CURL_EXPORT_PCDIR([$want_nghttp3_path])
      $PKGCONFIG --libs-only-L libnghttp3`
    AC_MSG_NOTICE([-L is $LD_NGHTTP3])

    LDFLAGS="$LDFLAGS $LD_NGHTTP3"
    CPPFLAGS="$CPPFLAGS $CPP_NGHTTP3"
    LIBS="$LIB_NGHTTP3 $LIBS"

    if test "x$cross_compiling" != "xyes"; then
      DIR_NGHTTP3=`echo $LD_NGHTTP3 | $SED -e 's/-L//'`
    fi
    AC_CHECK_LIB(nghttp3, nghttp3_conn_client_new,
      [
       AC_CHECK_HEADERS(nghttp3/nghttp3.h,
          curl_h3_msg="enabled (ngtcp2 + nghttp3)"
          NGHTTP3_ENABLED=1
          AC_DEFINE(USE_NGHTTP3, 1, [if nghttp3 is in use])
          AC_SUBST(USE_NGHTTP3, [1])
          CURL_LIBRARY_PATH="$CURL_LIBRARY_PATH:$DIR_NGHTTP3"
          export CURL_LIBRARY_PATH
          AC_MSG_NOTICE([Added $DIR_NGHTTP3 to CURL_LIBRARY_PATH])
          experimental="$experimental HTTP3"
       )
      ],
        dnl not found, revert back to clean variables
        LDFLAGS=$CLEANLDFLAGS
        CPPFLAGS=$CLEANCPPFLAGS
        LIBS=$CLEANLIBS
    )

  else
    dnl no nghttp3 pkg-config found, deal with it
    if test X"$want_nghttp3" != Xdefault; then
      dnl To avoid link errors, we do not allow --with-nghttp3 without
      dnl a pkgconfig file
      AC_MSG_ERROR([--with-nghttp3 was specified but could not find nghttp3 pkg-config file.])
    fi
  fi

fi

dnl **********************************************************************
dnl Check for quiche (QUIC)
dnl **********************************************************************

OPT_QUICHE="yes"

if test "x$disable_http" = "xyes" -o "x$USE_NGTCP" = "x1"; then
  # without HTTP or with ngtcp2, quiche is no use
  OPT_QUICHE="no"
fi

AC_ARG_WITH(quiche,
AC_HELP_STRING([--with-quiche=PATH],[Enable quiche usage])
AC_HELP_STRING([--without-quiche],[Disable quiche usage]),
  [OPT_QUICHE=$withval])
case "$OPT_QUICHE" in
  no)
    dnl --without-quiche option used
    want_quiche="no"
    ;;
  yes)
    dnl --with-quiche option used without path
    want_quiche="default"
    want_quiche_path=""
    ;;
  *)
    dnl --with-quiche option used with path
    want_quiche="yes"
    want_quiche_path="$withval"
    ;;
esac

if test X"$want_quiche" != Xno; then
  dnl backup the pre-quiche variables
  CLEANLDFLAGS="$LDFLAGS"
  CLEANCPPFLAGS="$CPPFLAGS"
  CLEANLIBS="$LIBS"

  CURL_CHECK_PKGCONFIG(quiche, $want_quiche_path)

  if test "$PKGCONFIG" != "no" ; then
    LIB_QUICHE=`CURL_EXPORT_PCDIR([$want_quiche_path])
      $PKGCONFIG --libs-only-l quiche`
    AC_MSG_NOTICE([-l is $LIB_QUICHE])

    CPP_QUICHE=`CURL_EXPORT_PCDIR([$want_quiche_path]) dnl
      $PKGCONFIG --cflags-only-I quiche`
    AC_MSG_NOTICE([-I is $CPP_QUICHE])

    LD_QUICHE=`CURL_EXPORT_PCDIR([$want_quiche_path])
      $PKGCONFIG --libs-only-L quiche`
    AC_MSG_NOTICE([-L is $LD_QUICHE])

    LDFLAGS="$LDFLAGS $LD_QUICHE"
    CPPFLAGS="$CPPFLAGS $CPP_QUICHE"
    LIBS="$LIB_QUICHE $LIBS"

    if test "x$cross_compiling" != "xyes"; then
      DIR_QUICHE=`echo $LD_QUICHE | $SED -e 's/-L//'`
    fi
    AC_CHECK_LIB(quiche, quiche_connect,
      [
       AC_CHECK_HEADERS(quiche.h,
          experimental="$experimental HTTP3"
          AC_MSG_NOTICE([HTTP3 support is experimental])
          curl_h3_msg="enabled (quiche)"
          QUICHE_ENABLED=1
          AC_DEFINE(USE_QUICHE, 1, [if quiche is in use])
          AC_SUBST(USE_QUICHE, [1])
          CURL_LIBRARY_PATH="$CURL_LIBRARY_PATH:$DIR_QUICHE"
          export CURL_LIBRARY_PATH
          AC_MSG_NOTICE([Added $DIR_QUICHE to CURL_LIBRARY_PATH]),
       )
      ],
        dnl not found, revert back to clean variables
        LDFLAGS=$CLEANLDFLAGS
        CPPFLAGS=$CLEANCPPFLAGS
        LIBS=$CLEANLIBS
    )
  else
    dnl no quiche pkg-config found, deal with it
    if test X"$want_quiche" != Xdefault; then
      dnl To avoid link errors, we do not allow --with-quiche without
      dnl a pkgconfig file
      AC_MSG_ERROR([--with-quiche was specified but could not find quiche pkg-config file.])
    fi
  fi
fi

dnl **********************************************************************
dnl Check for zsh completion path
dnl **********************************************************************

OPT_ZSH_FPATH=default
AC_ARG_WITH(zsh-functions-dir,
AC_HELP_STRING([--with-zsh-functions-dir=PATH],[Install zsh completions to PATH])
AC_HELP_STRING([--without-zsh-functions-dir],[Do not install zsh completions]),
  [OPT_ZSH_FPATH=$withval])
case "$OPT_ZSH_FPATH" in
  no)
    dnl --without-zsh-functions-dir option used
    ;;
  default|yes)
    dnl --with-zsh-functions-dir option used without path
    ZSH_FUNCTIONS_DIR="$datarootdir/zsh/site-functions"
    AC_SUBST(ZSH_FUNCTIONS_DIR)
    ;;
  *)
    dnl --with-zsh-functions-dir option used with path
    ZSH_FUNCTIONS_DIR="$withval"
    AC_SUBST(ZSH_FUNCTIONS_DIR)
    ;;
esac

dnl **********************************************************************
dnl Check for fish completion path
dnl **********************************************************************

OPT_FISH_FPATH=default
AC_ARG_WITH(fish-functions-dir,
AC_HELP_STRING([--with-fish-functions-dir=PATH],[Install fish completions to PATH])
AC_HELP_STRING([--without-fish-functions-dir],[Do not install fish completions]),
  [OPT_FISH_FPATH=$withval])
case "$OPT_FISH_FPATH" in
  no)
    dnl --without-fish-functions-dir option used
    ;;
  default|yes)
    dnl --with-fish-functions-dir option used without path
    CURL_CHECK_PKGCONFIG(fish)
    if test "$PKGCONFIG" != "no" ; then
      FISH_FUNCTIONS_DIR="$($PKGCONFIG --variable completionsdir fish)"
    else
      FISH_FUNCTIONS_DIR="$datarootdir/fish/vendor_completions.d"
    fi
    AC_SUBST(FISH_FUNCTIONS_DIR)
    ;;
  *)
    dnl --with-fish-functions-dir option used with path
    FISH_FUNCTIONS_DIR="$withval"
    AC_SUBST(FISH_FUNCTIONS_DIR)
    ;;
esac

dnl **********************************************************************
dnl Back to "normal" configuring
dnl **********************************************************************

dnl Checks for header files.
AC_HEADER_STDC

CURL_CHECK_HEADER_MALLOC
CURL_CHECK_HEADER_MEMORY

dnl Now check for the very most basic headers. Then we can use these
dnl ones as default-headers when checking for the rest!
AC_CHECK_HEADERS(
        sys/types.h \
        sys/time.h \
        sys/select.h \
        sys/socket.h \
        sys/ioctl.h \
        sys/uio.h \
        assert.h \
        unistd.h \
        stdlib.h \
        arpa/inet.h \
        net/if.h \
        netinet/in.h \
	netinet/in6.h \
        sys/un.h \
        linux/tcp.h \
        netinet/tcp.h \
        netdb.h \
        sys/sockio.h \
        sys/stat.h \
        sys/param.h \
        termios.h \
        termio.h \
        sgtty.h \
        fcntl.h \
        alloca.h \
        time.h \
        io.h \
        pwd.h \
        utime.h \
        sys/utime.h \
        sys/poll.h \
        poll.h \
        socket.h \
        sys/resource.h \
        libgen.h \
        locale.h \
        errno.h \
        stdbool.h \
        arpa/tftp.h \
        sys/filio.h \
        sys/wait.h \
        setjmp.h,
dnl to do if not found
[],
dnl to do if found
[],
dnl default includes
[
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#ifdef HAVE_NETINET_IN6_H
#include <netinet/in6.h>
#endif
#ifdef HAVE_SYS_UN_H
#include <sys/un.h>
#endif
]
)


dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
CURL_CHECK_VARIADIC_MACROS
AC_TYPE_SIZE_T
AC_HEADER_TIME
CURL_CHECK_STRUCT_TIMEVAL
CURL_VERIFY_RUNTIMELIBS

AX_COMPILE_CHECK_SIZEOF(size_t)
AX_COMPILE_CHECK_SIZEOF(long)
AX_COMPILE_CHECK_SIZEOF(int)
AX_COMPILE_CHECK_SIZEOF(short)
AX_COMPILE_CHECK_SIZEOF(time_t)
AX_COMPILE_CHECK_SIZEOF(off_t)

o=$CPPFLAGS
CPPFLAGS="-I$srcdir/include $CPPFLAGS"
AX_COMPILE_CHECK_SIZEOF(curl_off_t, [
#include <curl/system.h>
])
CPPFLAGS=$o

AC_CHECK_TYPE(long long,
   [AC_DEFINE(HAVE_LONGLONG, 1,
      [Define to 1 if the compiler supports the 'long long' data type.])]
   longlong="yes"
)

if test "xyes" = "x$longlong"; then
  AC_MSG_CHECKING([if numberLL works])
  AC_COMPILE_IFELSE([
    AC_LANG_PROGRAM([[
    ]],[[
      long long val = 1000LL;
    ]])
  ],[
    AC_MSG_RESULT([yes])
    AC_DEFINE(HAVE_LL, 1, [if your compiler supports LL])
  ],[
    AC_MSG_RESULT([no])
  ])
fi


# check for ssize_t
AC_CHECK_TYPE(ssize_t, ,
   AC_DEFINE(ssize_t, int, [the signed version of size_t]))

# check for bool type
AC_CHECK_TYPE([bool],[
  AC_DEFINE(HAVE_BOOL_T, 1,
    [Define to 1 if bool is an available type.])
], ,[
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_STDBOOL_H
#include <stdbool.h>
#endif
])

# check for sa_family_t
AC_CHECK_TYPE(sa_family_t,
   AC_DEFINE(CURL_SA_FAMILY_T, sa_family_t, [IP address type in sockaddr]),
   [
   # The windows name?
   AC_CHECK_TYPE(ADDRESS_FAMILY,
     AC_DEFINE(CURL_SA_FAMILY_T, ADDRESS_FAMILY, [IP address type in sockaddr]),
     AC_DEFINE(CURL_SA_FAMILY_T, unsigned short, [IP address type in sockaddr]),
    [
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
    ])
   ],
[
#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
])

AC_MSG_CHECKING([if time_t is unsigned])
CURL_RUN_IFELSE(
  [
  #include <time.h>
  #include <limits.h>
  time_t t = -1;
  return (t > 0);
  ],[
  AC_MSG_RESULT([yes])
  AC_DEFINE(HAVE_TIME_T_UNSIGNED, 1, [Define this if time_t is unsigned])
],[
  AC_MSG_RESULT([no])
],[
  dnl cross-compiling, most systems are unsigned
  AC_MSG_RESULT([no])
])

CURL_CONFIGURE_PULL_SYS_POLL

TYPE_IN_ADDR_T

TYPE_SOCKADDR_STORAGE

TYPE_SIG_ATOMIC_T

AC_TYPE_SIGNAL

CURL_CHECK_FUNC_SELECT

CURL_CHECK_FUNC_RECV
CURL_CHECK_FUNC_SEND
CURL_CHECK_MSG_NOSIGNAL

CURL_CHECK_FUNC_ALARM
CURL_CHECK_FUNC_BASENAME
CURL_CHECK_FUNC_CLOSESOCKET
CURL_CHECK_FUNC_CLOSESOCKET_CAMEL
CURL_CHECK_FUNC_CONNECT
CURL_CHECK_FUNC_FCNTL
CURL_CHECK_FUNC_FREEADDRINFO
CURL_CHECK_FUNC_FREEIFADDRS
CURL_CHECK_FUNC_FSETXATTR
CURL_CHECK_FUNC_FTRUNCATE
CURL_CHECK_FUNC_GETADDRINFO
CURL_CHECK_FUNC_GAI_STRERROR
CURL_CHECK_FUNC_GETHOSTBYADDR
CURL_CHECK_FUNC_GETHOSTBYADDR_R
CURL_CHECK_FUNC_GETHOSTBYNAME
CURL_CHECK_FUNC_GETHOSTBYNAME_R
CURL_CHECK_FUNC_GETHOSTNAME
CURL_CHECK_FUNC_GETPEERNAME
CURL_CHECK_FUNC_GETSOCKNAME
CURL_CHECK_FUNC_IF_NAMETOINDEX
CURL_CHECK_FUNC_GETIFADDRS
CURL_CHECK_FUNC_GETSERVBYPORT_R
CURL_CHECK_FUNC_GMTIME_R
CURL_CHECK_FUNC_INET_NTOA_R
CURL_CHECK_FUNC_INET_NTOP
CURL_CHECK_FUNC_INET_PTON
CURL_CHECK_FUNC_IOCTL
CURL_CHECK_FUNC_IOCTLSOCKET
CURL_CHECK_FUNC_IOCTLSOCKET_CAMEL
CURL_CHECK_FUNC_LOCALTIME_R
CURL_CHECK_FUNC_MEMRCHR
CURL_CHECK_FUNC_POLL
CURL_CHECK_FUNC_SETSOCKOPT
CURL_CHECK_FUNC_SIGACTION
CURL_CHECK_FUNC_SIGINTERRUPT
CURL_CHECK_FUNC_SIGNAL
CURL_CHECK_FUNC_SIGSETJMP
CURL_CHECK_FUNC_SOCKET
CURL_CHECK_FUNC_SOCKETPAIR
CURL_CHECK_FUNC_STRCASECMP
CURL_CHECK_FUNC_STRCMPI
CURL_CHECK_FUNC_STRDUP
CURL_CHECK_FUNC_STRERROR_R
CURL_CHECK_FUNC_STRICMP
CURL_CHECK_FUNC_STRNCASECMP
CURL_CHECK_FUNC_STRNCMPI
CURL_CHECK_FUNC_STRNICMP
CURL_CHECK_FUNC_STRSTR
CURL_CHECK_FUNC_STRTOK_R
CURL_CHECK_FUNC_STRTOLL
CURL_CHECK_FUNC_WRITEV

case $host in
  *msdosdjgpp)
     ac_cv_func_pipe=no
     skipcheck_pipe=yes
     AC_MSG_NOTICE([skip check for pipe on msdosdjgpp])
    ;;
esac

AC_CHECK_DECLS([getpwuid_r], [], [AC_DEFINE(HAVE_DECL_GETPWUID_R_MISSING, 1, "Set if getpwuid_r() declaration is missing")],
        [[#include <pwd.h>
          #include <sys/types.h>]])


AC_CHECK_FUNCS([fnmatch \
  geteuid \
  getpass_r \
  getppid \
  getpwuid \
  getpwuid_r \
  getrlimit \
  gettimeofday \
  if_nametoindex \
  mach_absolute_time \
  pipe \
  setlocale \
  setmode \
  setrlimit \
  usleep \
  utime \
  utimes
],[
],[
  func="$ac_func"
  eval skipcheck=\$skipcheck_$func
  if test "x$skipcheck" != "xyes"; then
    AC_MSG_CHECKING([deeper for $func])
    AC_LINK_IFELSE([
      AC_LANG_PROGRAM([[
      ]],[[
        $func ();
      ]])
    ],[
      AC_MSG_RESULT([yes])
      eval "ac_cv_func_$func=yes"
      AC_DEFINE_UNQUOTED(XC_SH_TR_CPP([HAVE_$func]), [1],
        [Define to 1 if you have the $func function.])
    ],[
      AC_MSG_RESULT([but still no])
    ])
  fi
])

CURL_CHECK_NONBLOCKING_SOCKET

dnl ************************************************************
dnl nroff tool stuff
dnl

AC_PATH_PROG( PERL, perl, ,
  $PATH:/usr/local/bin/perl:/usr/bin/:/usr/local/bin )
AC_SUBST(PERL)

AC_PATH_PROGS( NROFF, gnroff nroff, ,
  $PATH:/usr/bin/:/usr/local/bin )
AC_SUBST(NROFF)

if test -n "$NROFF"; then
  dnl only check for nroff options if an nroff command was found

  AC_MSG_CHECKING([how to use *nroff to get plain text from man pages])
  MANOPT="-man"
  mancheck=`echo foo | $NROFF $MANOPT 2>/dev/null`
  if test -z "$mancheck"; then
    MANOPT="-mandoc"
   mancheck=`echo foo | $NROFF $MANOPT 2>/dev/null`
    if test -z "$mancheck"; then
      MANOPT=""
      AC_MSG_RESULT([failed])
      AC_MSG_WARN([found no *nroff option to get plaintext from man pages])
    else
      AC_MSG_RESULT([$MANOPT])
    fi
  else
    AC_MSG_RESULT([$MANOPT])
  fi
  AC_SUBST(MANOPT)
fi

if test -z "$MANOPT"
then
  dnl if no nroff tool was found, or no option that could convert man pages
  dnl was found, then disable the built-in manual stuff
  AC_MSG_WARN([disabling built-in manual])
  USE_MANUAL="no";
fi

dnl *************************************************************************
dnl If the manual variable still is set, then we go with providing a built-in
dnl manual

if test "$USE_MANUAL" = "1"; then
  AC_DEFINE(USE_MANUAL, 1, [If you want to build curl with the built-in manual])
  curl_manual_msg="enabled"
fi

dnl set variable for use in automakefile(s)
AM_CONDITIONAL(USE_MANUAL, test x"$USE_MANUAL" = x1)

CURL_CHECK_LIB_ARES
AM_CONDITIONAL(USE_EMBEDDED_ARES, test x$embedded_ares = xyes)

if test "x$curl_cv_native_windows" != "xyes" &&
   test "x$enable_shared" = "xyes"; then
  build_libhostname=yes
else
  build_libhostname=no
fi
AM_CONDITIONAL(BUILD_LIBHOSTNAME, test x$build_libhostname = xyes)

if test "x$want_ares" != xyes; then
  CURL_CHECK_OPTION_THREADED_RESOLVER
fi

dnl ************************************************************
dnl disable POSIX threads
dnl
AC_MSG_CHECKING([whether to use POSIX threads for threaded resolver])
AC_ARG_ENABLE(pthreads,
AC_HELP_STRING([--enable-pthreads],
               [Enable POSIX threads (default for threaded resolver)])
AC_HELP_STRING([--disable-pthreads],[Disable POSIX threads]),
[ case "$enableval" in
  no)  AC_MSG_RESULT(no)
       want_pthreads=no
       ;;
  *)   AC_MSG_RESULT(yes)
       want_pthreads=yes
       ;;
  esac ], [
       AC_MSG_RESULT(auto)
       want_pthreads=auto
       ]
)

dnl turn off pthreads if rt is disabled
if test "$want_pthreads" != "no"; then
  if test "$want_pthreads" = "yes" && test "$dontwant_rt" = "yes"; then
    AC_MSG_ERROR([options --enable-pthreads and --disable-rt are mutually exclusive])
  fi
  if test "$dontwant_rt" != "no"; then
    dnl if --enable-pthreads was explicit then warn it's being ignored
    if test "$want_pthreads" = "yes"; then
      AC_MSG_WARN([--enable-pthreads Ignored since librt is disabled.])
    fi
    want_pthreads=no
  fi
fi

dnl turn off pthreads if no threaded resolver
if test "$want_pthreads" != "no" && test "$want_thres" != "yes"; then
  want_pthreads=no
fi

dnl detect pthreads
if test "$want_pthreads" != "no"; then
  AC_CHECK_HEADER(pthread.h,
    [ AC_DEFINE(HAVE_PTHREAD_H, 1, [if you have <pthread.h>])
      save_CFLAGS="$CFLAGS"

      dnl first check for function without lib
      AC_CHECK_FUNC(pthread_create, [USE_THREADS_POSIX=1] )

      dnl on HPUX, life is more complicated...
      case $host in
      *-hp-hpux*)
         dnl it doesn't actually work without -lpthread
         USE_THREADS_POSIX=""
         ;;
      *)
         ;;
      esac

      dnl if it wasn't found without lib, search for it in pthread lib
      if test "$USE_THREADS_POSIX" != "1"
      then
        CFLAGS="$CFLAGS -pthread"
        AC_CHECK_LIB(pthread, pthread_create,
                     [USE_THREADS_POSIX=1],
                     [ CFLAGS="$save_CFLAGS"])
      fi

      if test "x$USE_THREADS_POSIX" = "x1"
      then
        AC_DEFINE(USE_THREADS_POSIX, 1, [if you want POSIX threaded DNS lookup])
        curl_res_msg="POSIX threaded"
      fi
  ])
fi

dnl threaded resolver check
if test "$want_thres" = "yes" && test "x$USE_THREADS_POSIX" != "x1"; then
  if test "$want_pthreads" = "yes"; then
    AC_MSG_ERROR([--enable-pthreads but pthreads was not found])
  fi
  dnl If native Windows fallback on Win32 threads since no POSIX threads
  if test "$curl_cv_native_windows" = "yes"; then
    USE_THREADS_WIN32=1
    AC_DEFINE(USE_THREADS_WIN32, 1, [if you want Win32 threaded DNS lookup])
    curl_res_msg="Win32 threaded"
  else
    AC_MSG_ERROR([Threaded resolver enabled but no thread library found])
  fi
fi

CURL_CONVERT_INCLUDE_TO_ISYSTEM

dnl ************************************************************
dnl disable verbose text strings
dnl
AC_MSG_CHECKING([whether to enable verbose strings])
AC_ARG_ENABLE(verbose,
AC_HELP_STRING([--enable-verbose],[Enable verbose strings])
AC_HELP_STRING([--disable-verbose],[Disable verbose strings]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_VERBOSE_STRINGS, 1, [to disable verbose strings])
       curl_verbose_msg="no"
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)

dnl ************************************************************
dnl enable SSPI support
dnl
AC_MSG_CHECKING([whether to enable SSPI support (Windows native builds only)])
AC_ARG_ENABLE(sspi,
AC_HELP_STRING([--enable-sspi],[Enable SSPI])
AC_HELP_STRING([--disable-sspi],[Disable SSPI]),
[ case "$enableval" in
  yes)
       if test "$curl_cv_native_windows" = "yes"; then
         AC_MSG_RESULT(yes)
         AC_DEFINE(USE_WINDOWS_SSPI, 1, [to enable SSPI support])
         AC_SUBST(USE_WINDOWS_SSPI, [1])
         curl_sspi_msg="enabled"
       else
         AC_MSG_RESULT(no)
         AC_MSG_WARN([--enable-sspi Ignored. Only supported on native Windows builds.])
       fi
       ;;
  *)
       if test "x$WINSSL_ENABLED" = "x1"; then
         # --with-winssl implies --enable-sspi
         AC_MSG_RESULT(yes)
       else
         AC_MSG_RESULT(no)
       fi
       ;;
  esac ],
       if test "x$WINSSL_ENABLED" = "x1"; then
         # --with-winssl implies --enable-sspi
         AC_MSG_RESULT(yes)
       else
         AC_MSG_RESULT(no)
       fi
)

dnl ************************************************************
dnl disable cryptographic authentication
dnl
AC_MSG_CHECKING([whether to enable cryptographic authentication methods])
AC_ARG_ENABLE(crypto-auth,
AC_HELP_STRING([--enable-crypto-auth],[Enable cryptographic authentication])
AC_HELP_STRING([--disable-crypto-auth],[Disable cryptographic authentication]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_CRYPTO_AUTH, 1, [to disable cryptographic authentication])
       CURL_DISABLE_CRYPTO_AUTH=1
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)

CURL_CHECK_OPTION_NTLM_WB

CURL_CHECK_NTLM_WB

dnl ************************************************************
dnl disable TLS-SRP authentication
dnl
AC_MSG_CHECKING([whether to enable TLS-SRP authentication])
AC_ARG_ENABLE(tls-srp,
AC_HELP_STRING([--enable-tls-srp],[Enable TLS-SRP authentication])
AC_HELP_STRING([--disable-tls-srp],[Disable TLS-SRP authentication]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       want_tls_srp=no
       ;;
  *)   AC_MSG_RESULT(yes)
       want_tls_srp=yes
       ;;
  esac ],
       AC_MSG_RESULT(yes)
       want_tls_srp=yes
)

if test "$want_tls_srp" = "yes" && ( test "x$HAVE_GNUTLS_SRP" = "x1" || test "x$HAVE_OPENSSL_SRP" = "x1") ; then
   AC_DEFINE(USE_TLS_SRP, 1, [Use TLS-SRP authentication])
   USE_TLS_SRP=1
   curl_tls_srp_msg="enabled"
fi

dnl ************************************************************
dnl disable Unix domain sockets support
dnl
AC_MSG_CHECKING([whether to enable Unix domain sockets])
AC_ARG_ENABLE(unix-sockets,
AC_HELP_STRING([--enable-unix-sockets],[Enable Unix domain sockets])
AC_HELP_STRING([--disable-unix-sockets],[Disable Unix domain sockets]),
[ case "$enableval" in
  no)  AC_MSG_RESULT(no)
       want_unix_sockets=no
       ;;
  *)   AC_MSG_RESULT(yes)
       want_unix_sockets=yes
       ;;
  esac ], [
       AC_MSG_RESULT(auto)
       want_unix_sockets=auto
       ]
)
if test "x$want_unix_sockets" != "xno"; then
  AC_CHECK_MEMBER([struct sockaddr_un.sun_path], [
    AC_DEFINE(USE_UNIX_SOCKETS, 1, [Use Unix domain sockets])
    AC_SUBST(USE_UNIX_SOCKETS, [1])
    curl_unix_sockets_msg="enabled"
  ], [
    if test "x$want_unix_sockets" = "xyes"; then
      AC_MSG_ERROR([--enable-unix-sockets is not available on this platform!])
    fi
  ], [
    #include <sys/un.h>
  ])
fi

dnl ************************************************************
dnl disable cookies support
dnl
AC_MSG_CHECKING([whether to support cookies])
AC_ARG_ENABLE(cookies,
AC_HELP_STRING([--enable-cookies],[Enable cookies support])
AC_HELP_STRING([--disable-cookies],[Disable cookies support]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_COOKIES, 1, [to disable cookies support])
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)

dnl ************************************************************
dnl disable HTTP authentication support
dnl
AC_MSG_CHECKING([whether to support HTTP authentication])
AC_ARG_ENABLE(http-auth,
AC_HELP_STRING([--enable-http-auth],[Enable HTTP authentication support])
AC_HELP_STRING([--disable-http-auth],[Disable HTTP authentication support]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_HTTP_AUTH, 1, [disable HTTP authentication])
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)

dnl ************************************************************
dnl disable DoH support
dnl
AC_MSG_CHECKING([whether to support DoH])
AC_ARG_ENABLE(doh,
AC_HELP_STRING([--enable-doh],[Enable DoH support])
AC_HELP_STRING([--disable-doh],[Disable DoH support]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_DOH, 1, [disable DoH])
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)

dnl ************************************************************
dnl disable mime API support
dnl
AC_MSG_CHECKING([whether to support the MIME API])
AC_ARG_ENABLE(mime,
AC_HELP_STRING([--enable-mime],[Enable mime API support])
AC_HELP_STRING([--disable-mime],[Disable mime API support]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_MIME, 1, [disable mime API])
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)

dnl ************************************************************
dnl disable date parsing
dnl
AC_MSG_CHECKING([whether to support date parsing])
AC_ARG_ENABLE(dateparse,
AC_HELP_STRING([--enable-dateparse],[Enable date parsing])
AC_HELP_STRING([--disable-dateparse],[Disable date parsing]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_PARSEDATE, 1, [disable date parsing])
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)

dnl ************************************************************
dnl disable netrc
dnl
AC_MSG_CHECKING([whether to support netrc parsing])
AC_ARG_ENABLE(netrc,
AC_HELP_STRING([--enable-netrc],[Enable netrc parsing])
AC_HELP_STRING([--disable-netrc],[Disable netrc parsing]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_NETRC, 1, [disable netrc parsing])
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)

dnl ************************************************************
dnl disable progress-meter
dnl
AC_MSG_CHECKING([whether to support progress-meter])
AC_ARG_ENABLE(progress-meter,
AC_HELP_STRING([--enable-progress-meter],[Enable progress-meter])
AC_HELP_STRING([--disable-progress-meter],[Disable progress-meter]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_PROGRESS_METER, 1, [disable progress-meter])
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)

dnl ************************************************************
dnl disable shuffle DNS support
dnl
AC_MSG_CHECKING([whether to support DNS shuffling])
AC_ARG_ENABLE(dnsshuffle,
AC_HELP_STRING([--enable-dnsshuffle],[Enable DNS shuffling])
AC_HELP_STRING([--disable-dnsshuffle],[Disable DNS shuffling]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       AC_DEFINE(CURL_DISABLE_SHUFFLE_DNS, 1, [disable DNS shuffling])
       ;;
  *)   AC_MSG_RESULT(yes)
       ;;
  esac ],
       AC_MSG_RESULT(yes)
)

dnl ************************************************************
dnl switch on/off alt-svc
dnl
curl_altsvc_msg="no      (--enable-alt-svc)";
AC_MSG_CHECKING([whether to support alt-svc])
AC_ARG_ENABLE(alt-svc,
AC_HELP_STRING([--enable-alt-svc],[Enable alt-svc support])
AC_HELP_STRING([--disable-alt-svc],[Disable alt-svc support]),
[ case "$enableval" in
  no)
       AC_MSG_RESULT(no)
       ;;
  *) AC_MSG_RESULT(yes)
       curl_altsvc_msg="enabled";
       enable_altsvc="yes"
       ;;
  esac ],
       AC_MSG_RESULT(no)
)

if test "$enable_altsvc" = "yes"; then
  AC_DEFINE(USE_ALTSVC, 1, [to enable alt-svc])
  experimental="$experimental alt-svc"
fi

dnl *************************************************************
dnl check whether ESNI support, if desired, is actually available
dnl
if test "x$want_esni" != "xno"; then
  AC_MSG_CHECKING([whether ESNI support is available])

  dnl assume NOT and look for sufficient condition
  ESNI_ENABLED=0
  ESNI_SUPPORT=''

  dnl OpenSSL with a chosen ESNI function should be enough
  dnl so more exhaustive checking seems unnecessary for now
  if test "x$OPENSSL_ENABLED" = "x1"; then
    AC_CHECK_FUNCS(SSL_get_esni_status,
      ESNI_SUPPORT="ESNI support available (OpenSSL with SSL_get_esni_status)"
      ESNI_ENABLED=1)

  dnl add 'elif' chain here for additional implementations
  fi

  dnl now deal with whatever we found
  if test "x$ESNI_ENABLED" = "x1"; then
    AC_DEFINE(USE_ESNI, 1, [if ESNI support is available])
    AC_MSG_RESULT($ESNI_SUPPORT)
    experimental="$experimental ESNI"
  else
    AC_MSG_ERROR([--enable-esni ignored: No ESNI support found])
  fi
fi

dnl ************************************************************
dnl hiding of library internal symbols
dnl
CURL_CONFIGURE_SYMBOL_HIDING

dnl
dnl All the library dependencies put into $LIB apply to libcurl only.
dnl
LIBCURL_LIBS=$LIBS

AC_SUBST(LIBCURL_LIBS)
AC_SUBST(CURL_NETWORK_LIBS)
AC_SUBST(CURL_NETWORK_AND_TIME_LIBS)

dnl BLANK_AT_MAKETIME may be used in our Makefile.am files to blank
dnl LIBS variable used in generated makefile at makefile processing
dnl time. Doing this functionally prevents LIBS from being used for
dnl all link targets in given makefile.
BLANK_AT_MAKETIME=
AC_SUBST(BLANK_AT_MAKETIME)

AM_CONDITIONAL(CROSSCOMPILING, test x$cross_compiling = xyes)

dnl yes or no
ENABLE_SHARED="$enable_shared"
AC_SUBST(ENABLE_SHARED)

dnl to let curl-config output the static libraries correctly
ENABLE_STATIC="$enable_static"
AC_SUBST(ENABLE_STATIC)


dnl
dnl For keeping supported features and protocols also in pkg-config file
dnl since it is more cross-compile friendly than curl-config
dnl

if test "x$OPENSSL_ENABLED" = "x1"; then
  SUPPORT_FEATURES="$SUPPORT_FEATURES SSL"
elif test -n "$SSL_ENABLED"; then
  SUPPORT_FEATURES="$SUPPORT_FEATURES SSL"
fi
if test "x$IPV6_ENABLED" = "x1"; then
  SUPPORT_FEATURES="$SUPPORT_FEATURES IPv6"
fi
if test "x$USE_UNIX_SOCKETS" = "x1"; then
  SUPPORT_FEATURES="$SUPPORT_FEATURES UnixSockets"
fi
if test "x$HAVE_LIBZ" = "x1"; then
  SUPPORT_FEATURES="$SUPPORT_FEATURES libz"
fi
if test "x$HAVE_BROTLI" = "x1"; then
  SUPPORT_FEATURES="$SUPPORT_FEATURES brotli"
fi
if test "x$USE_ARES" = "x1" -o "x$USE_THREADS_POSIX" = "x1" \
                            -o "x$USE_THREADS_WIN32" = "x1"; then
  SUPPORT_FEATURES="$SUPPORT_FEATURES AsynchDNS"
fi
if test "x$IDN_ENABLED" = "x1"; then
  SUPPORT_FEATURES="$SUPPORT_FEATURES IDN"
fi
if test "x$USE_WINDOWS_SSPI" = "x1"; then
  SUPPORT_FEATURES="$SUPPORT_FEATURES SSPI"
fi

if test "x$HAVE_GSSAPI" = "x1"; then
  SUPPORT_FEATURES="$SUPPORT_FEATURES GSS-API"
fi

if test "x$curl_psl_msg" = "xenabled"; then
  SUPPORT_FEATURES="$SUPPORT_FEATURES PSL"
fi

if test "x$enable_altsvc" = "xyes"; then
  SUPPORT_FEATURES="$SUPPORT_FEATURES alt-svc"
fi

if test "x$CURL_DISABLE_CRYPTO_AUTH" != "x1" -a \
    \( "x$HAVE_GSSAPI" = "x1" -o "x$USE_WINDOWS_SSPI" = "x1" \); then
  SUPPORT_FEATURES="$SUPPORT_FEATURES SPNEGO"
fi

if test "x$CURL_DISABLE_CRYPTO_AUTH" != "x1" -a \
    \( "x$HAVE_GSSAPI" = "x1" -o "x$USE_WINDOWS_SSPI" = "x1" \); then
  SUPPORT_FEATURES="$SUPPORT_FEATURES Kerberos"
fi

if test "x$CURL_DISABLE_CRYPTO_AUTH" != "x1"; then
  if test "x$OPENSSL_ENABLED" = "x1" -o "x$USE_WINDOWS_SSPI" = "x1" \
      -o "x$GNUTLS_ENABLED" = "x1" -o "x$MBEDTLS_ENABLED" = "x1" \
      -o "x$NSS_ENABLED" = "x1" -o "x$SECURETRANSPORT_ENABLED" = "x1"; then
    SUPPORT_FEATURES="$SUPPORT_FEATURES NTLM"

    if test "x$CURL_DISABLE_HTTP" != "x1" -a \
        "x$NTLM_WB_ENABLED" = "x1"; then
      SUPPORT_FEATURES="$SUPPORT_FEATURES NTLM_WB"
    fi
  fi
fi

if test "x$USE_TLS_SRP" = "x1"; then
  SUPPORT_FEATURES="$SUPPORT_FEATURES TLS-SRP"
fi

if test "x$USE_NGHTTP2" = "x1"; then
  SUPPORT_FEATURES="$SUPPORT_FEATURES HTTP2"
fi

if test "x$USE_NGTCP2" = "x1" -o "x$USE_QUICHE" = "x1"; then
  SUPPORT_FEATURES="$SUPPORT_FEATURES HTTP3"
fi

if test "x$CURL_WITH_MULTI_SSL" = "x1"; then
  SUPPORT_FEATURES="$SUPPORT_FEATURES MultiSSL"
fi

if test "x$OPENSSL_ENABLED" = "x1" -o "x$GNUTLS_ENABLED" = "x1" \
    -o "x$NSS_ENABLED" = "x1"; then
  SUPPORT_FEATURES="$SUPPORT_FEATURES HTTPS-proxy"
fi

if test "x$ESNI_ENABLED" = "x1"; then
  SUPPORT_FEATURES="$SUPPORT_FEATURES ESNI"
fi

AC_SUBST(SUPPORT_FEATURES)

dnl For supported protocols in pkg-config file
if test "x$CURL_DISABLE_HTTP" != "x1"; then
  SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS HTTP"
  if test "x$SSL_ENABLED" = "x1"; then
    SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS HTTPS"
  fi
fi
if test "x$CURL_DISABLE_FTP" != "x1"; then
  SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS FTP"
  if test "x$SSL_ENABLED" = "x1"; then
    SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS FTPS"
  fi
fi
if test "x$CURL_DISABLE_FILE" != "x1"; then
  SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS FILE"
fi
if test "x$CURL_DISABLE_TELNET" != "x1"; then
  SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS TELNET"
fi
if test "x$CURL_DISABLE_LDAP" != "x1"; then
  SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS LDAP"
  if test "x$CURL_DISABLE_LDAPS" != "x1"; then
    if (test "x$USE_OPENLDAP" = "x1" && test "x$SSL_ENABLED" = "x1") ||
      (test "x$USE_OPENLDAP" != "x1"  && test "x$HAVE_LDAP_SSL" = "x1"); then
      SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS LDAPS"
    fi
  fi
fi
if test "x$CURL_DISABLE_DICT" != "x1"; then
  SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS DICT"
fi
if test "x$CURL_DISABLE_TFTP" != "x1"; then
  SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS TFTP"
fi
if test "x$CURL_DISABLE_GOPHER" != "x1"; then
  SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS GOPHER"
fi
if test "x$CURL_DISABLE_POP3" != "x1"; then
  SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS POP3"
  if test "x$SSL_ENABLED" = "x1"; then
    SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS POP3S"
  fi
fi
if test "x$CURL_DISABLE_IMAP" != "x1"; then
  SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS IMAP"
  if test "x$SSL_ENABLED" = "x1"; then
    SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS IMAPS"
  fi
fi
if test "x$CURL_DISABLE_SMB" != "x1" \
    -a "x$CURL_DISABLE_CRYPTO_AUTH" != "x1" \
    -a \( "x$OPENSSL_ENABLED" = "x1" -o "x$USE_WINDOWS_SSPI" = "x1" \
      -o "x$GNUTLS_ENABLED" = "x1" -o "x$MBEDTLS_ENABLED" = "x1" \
      -o "x$NSS_ENABLED" = "x1" -o "x$SECURETRANSPORT_ENABLED" = "x1" \); then
  SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS SMB"
  if test "x$SSL_ENABLED" = "x1"; then
    SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS SMBS"
  fi
fi
if test "x$CURL_DISABLE_SMTP" != "x1"; then
  SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS SMTP"
  if test "x$SSL_ENABLED" = "x1"; then
    SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS SMTPS"
  fi
fi
if test "x$USE_LIBSSH2" = "x1"; then
  SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS SCP"
  SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS SFTP"
fi
if test "x$USE_LIBSSH" = "x1"; then
  SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS SCP"
  SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS SFTP"
fi
if test "x$USE_WOLFSSH" = "x1"; then
  SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS SCP"
  SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS SFTP"
fi
if test "x$CURL_DISABLE_RTSP" != "x1"; then
  SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS RTSP"
fi
if test "x$USE_LIBRTMP" = "x1"; then
  SUPPORT_PROTOCOLS="$SUPPORT_PROTOCOLS RTMP"
fi

dnl replace spaces with newlines
dnl sort the lines
dnl replace the newlines back to spaces
SUPPORT_PROTOCOLS=`echo $SUPPORT_PROTOCOLS | tr ' ' '\012' | sort | tr '\012' ' '`

AC_SUBST(SUPPORT_PROTOCOLS)

dnl squeeze whitespace out of some variables

squeeze CFLAGS
squeeze CPPFLAGS
squeeze DEFS
squeeze LDFLAGS
squeeze LIBS

squeeze LIBCURL_LIBS
squeeze CURL_NETWORK_LIBS
squeeze CURL_NETWORK_AND_TIME_LIBS

squeeze SUPPORT_FEATURES
squeeze SUPPORT_PROTOCOLS

XC_CHECK_BUILD_FLAGS

SSL_BACKENDS=${ssl_backends}
AC_SUBST(SSL_BACKENDS)

if test "x$want_curldebug_assumed" = "xyes" &&
  test "x$want_curldebug" = "xyes" && test "x$USE_ARES" = "x1"; then
  ac_configure_args="$ac_configure_args --enable-curldebug"
fi

AC_CONFIG_FILES([Makefile \
           docs/Makefile \
           docs/examples/Makefile \
           docs/libcurl/Makefile \
           docs/libcurl/opts/Makefile \
           docs/cmdline-opts/Makefile \
           include/Makefile \
           include/curl/Makefile \
           src/Makefile \
           lib/Makefile \
           scripts/Makefile \
           lib/libcurl.vers \
           tests/Makefile \
           tests/certs/Makefile \
           tests/certs/scripts/Makefile \
           tests/data/Makefile \
           tests/server/Makefile \
           tests/libtest/Makefile \
           tests/unit/Makefile \
           packages/Makefile \
           packages/vms/Makefile \
           curl-config \
           libcurl.pc
])
AC_OUTPUT

CURL_GENERATE_CONFIGUREHELP_PM

XC_AMEND_DISTCLEAN([lib src tests/unit tests/server tests/libtest docs/examples])

AC_MSG_NOTICE([Configured to build curl/libcurl:

  Host setup:       ${host}
  Install prefix:   ${prefix}
  Compiler:         ${CC}
   CFLAGS:          ${CFLAGS}
   CPPFLAGS:        ${CPPFLAGS}
   LDFLAGS:         ${LDFLAGS}
   LIBS:            ${LIBS}

  curl version:     ${CURLVERSION}
  SSL:              ${curl_ssl_msg}
  SSH:              ${curl_ssh_msg}
  zlib:             ${curl_zlib_msg}
  brotli:           ${curl_brotli_msg}
  GSS-API:          ${curl_gss_msg}
  TLS-SRP:          ${curl_tls_srp_msg}
  resolver:         ${curl_res_msg}
  IPv6:             ${curl_ipv6_msg}
  Unix sockets:     ${curl_unix_sockets_msg}
  IDN:              ${curl_idn_msg}
  Build libcurl:    Shared=${enable_shared}, Static=${enable_static}
  Built-in manual:  ${curl_manual_msg}
  --libcurl option: ${curl_libcurl_msg}
  Verbose errors:   ${curl_verbose_msg}
  Code coverage:    ${curl_coverage_msg}
  SSPI:             ${curl_sspi_msg}
  ca cert bundle:   ${ca}${ca_warning}
  ca cert path:     ${capath}${capath_warning}
  ca fallback:      ${with_ca_fallback}
  LDAP:             ${curl_ldap_msg}
  LDAPS:            ${curl_ldaps_msg}
  RTSP:             ${curl_rtsp_msg}
  RTMP:             ${curl_rtmp_msg}
  Metalink:         ${curl_mtlnk_msg}
  PSL:              ${curl_psl_msg}
  Alt-svc:          ${curl_altsvc_msg}
  HTTP2:            ${curl_h2_msg}
  HTTP3:            ${curl_h3_msg}
  ESNI:             ${curl_esni_msg}
  Protocols:        ${SUPPORT_PROTOCOLS}
  Features:         ${SUPPORT_FEATURES}
])
if test -n "$experimental"; then
 cat >&2 << _EOF
  WARNING: $experimental enabled but marked EXPERIMENTAL. Use with caution!
_EOF
fi