aboutsummaryrefslogtreecommitdiff
path: root/ares/m4/reentrant.m4
blob: 29cc809ea4a7afe071c0650e693023512ed2528e (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


dnl CARES_CHECK_NEED_REENTRANT_GMTIME_R
dnl -------------------------------------------------
dnl Checks if the preprocessor _REENTRANT definition
dnl makes function gmtime_r compiler visible.

AC_DEFUN([CARES_CHECK_NEED_REENTRANT_GMTIME_R], [
  AC_LINK_IFELSE([
    AC_LANG_FUNC_LINK_TRY([gmtime_r])
  ],[
    tmp_gmtime_r="yes"
  ],[
    tmp_gmtime_r="no"
  ])
  if test "$tmp_gmtime_r" = "yes"; then
    AC_EGREP_CPP([gmtime_r],[
#include <sys/types.h>
#include <time.h>
    ],[
      tmp_gmtime_r="proto_declared"
    ],[
      AC_EGREP_CPP([gmtime_r],[
#define _REENTRANT
#include <sys/types.h>
#include <time.h>
      ],[
        tmp_gmtime_r="proto_needs_reentrant"
        tmp_need_reentrant="yes"
      ])
    ])
  fi
])


dnl CARES_CHECK_NEED_REENTRANT_LOCALTIME_R
dnl -------------------------------------------------
dnl Checks if the preprocessor _REENTRANT definition
dnl makes function localtime_r compiler visible.

AC_DEFUN([CARES_CHECK_NEED_REENTRANT_LOCALTIME_R], [
  AC_LINK_IFELSE([
    AC_LANG_FUNC_LINK_TRY([localtime_r])
  ],[
    tmp_localtime_r="yes"
  ],[
    tmp_localtime_r="no"
  ])
  if test "$tmp_localtime_r" = "yes"; then
    AC_EGREP_CPP([localtime_r],[
#include <sys/types.h>
#include <time.h>
    ],[
      tmp_localtime_r="proto_declared"
    ],[
      AC_EGREP_CPP([localtime_r],[
#define _REENTRANT
#include <sys/types.h>
#include <time.h>
      ],[
        tmp_localtime_r="proto_needs_reentrant"
        tmp_need_reentrant="yes"
      ])
    ])
  fi
])


dnl CARES_CHECK_NEED_REENTRANT_STRERROR_R
dnl -------------------------------------------------
dnl Checks if the preprocessor _REENTRANT definition
dnl makes function strerror_r compiler visible.

AC_DEFUN([CARES_CHECK_NEED_REENTRANT_STRERROR_R], [
  AC_LINK_IFELSE([
    AC_LANG_FUNC_LINK_TRY([strerror_r])
  ],[
    tmp_strerror_r="yes"
  ],[
    tmp_strerror_r="no"
  ])
  if test "$tmp_strerror_r" = "yes"; then
    AC_EGREP_CPP([strerror_r],[
#include <sys/types.h>
#include <string.h>
    ],[
      tmp_strerror_r="proto_declared"
    ],[
      AC_EGREP_CPP([strerror_r],[
#define _REENTRANT
#include <sys/types.h>
#include <string.h>
      ],[
        tmp_strerror_r="proto_needs_reentrant"
        tmp_need_reentrant="yes"
      ])
    ])
  fi
])


dnl CARES_CHECK_NEED_REENTRANT_STRTOK_R
dnl -------------------------------------------------
dnl Checks if the preprocessor _REENTRANT definition
dnl makes function strtok_r compiler visible.

AC_DEFUN([CARES_CHECK_NEED_REENTRANT_STRTOK_R], [
  AC_LINK_IFELSE([
    AC_LANG_FUNC_LINK_TRY([strtok_r])
  ],[
    tmp_strtok_r="yes"
  ],[
    tmp_strtok_r="no"
  ])
  if test "$tmp_strtok_r" = "yes"; then
    AC_EGREP_CPP([strtok_r],[
#include <sys/types.h>
#include <string.h>
    ],[
      tmp_strtok_r="proto_declared"
    ],[
      AC_EGREP_CPP([strtok_r],[
#define _REENTRANT
#include <sys/types.h>
#include <string.h>
      ],[
        tmp_strtok_r="proto_needs_reentrant"
        tmp_need_reentrant="yes"
      ])
    ])
  fi
])


dnl CARES_CHECK_NEED_REENTRANT_INET_NTOA_R
dnl -------------------------------------------------
dnl Checks if the preprocessor _REENTRANT definition
dnl makes function inet_ntoa_r compiler visible.

AC_DEFUN([CARES_CHECK_NEED_REENTRANT_INET_NTOA_R], [
  AC_LINK_IFELSE([
    AC_LANG_FUNC_LINK_TRY([inet_ntoa_r])
  ],[
    tmp_inet_ntoa_r="yes"
  ],[
    tmp_inet_ntoa_r="no"
  ])
  if test "$tmp_inet_ntoa_r" = "yes"; then
    AC_EGREP_CPP([inet_ntoa_r],[
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
    ],[
      tmp_inet_ntoa_r="proto_declared"
    ],[
      AC_EGREP_CPP([inet_ntoa_r],[
#define _REENTRANT
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
      ],[
        tmp_inet_ntoa_r="proto_needs_reentrant"
        tmp_need_reentrant="yes"
      ])
    ])
  fi
])


dnl CARES_CHECK_NEED_REENTRANT_GETHOSTBYADDR_R
dnl -------------------------------------------------
dnl Checks if the preprocessor _REENTRANT definition
dnl makes function gethostbyaddr_r compiler visible.

AC_DEFUN([CARES_CHECK_NEED_REENTRANT_GETHOSTBYADDR_R], [
  AC_LINK_IFELSE([
    AC_LANG_FUNC_LINK_TRY([gethostbyaddr_r])
  ],[
    tmp_gethostbyaddr_r="yes"
  ],[
    tmp_gethostbyaddr_r="no"
  ])
  if test "$tmp_gethostbyaddr_r" = "yes"; then
    AC_EGREP_CPP([gethostbyaddr_r],[
#include <sys/types.h>
#include <netdb.h>
    ],[
      tmp_gethostbyaddr_r="proto_declared"
    ],[
      AC_EGREP_CPP([gethostbyaddr_r],[
#define _REENTRANT
#include <sys/types.h>
#include <netdb.h>
      ],[
        tmp_gethostbyaddr_r="proto_needs_reentrant"
        tmp_need_reentrant="yes"
      ])
    ])
  fi
])


dnl CARES_CHECK_NEED_REENTRANT_GETHOSTBYNAME_R
dnl -------------------------------------------------
dnl Checks if the preprocessor _REENTRANT definition
dnl makes function gethostbyname_r compiler visible.

AC_DEFUN([CARES_CHECK_NEED_REENTRANT_GETHOSTBYNAME_R], [
  AC_LINK_IFELSE([
    AC_LANG_FUNC_LINK_TRY([gethostbyname_r])
  ],[
    tmp_gethostbyname_r="yes"
  ],[
    tmp_gethostbyname_r="no"
  ])
  if test "$tmp_gethostbyname_r" = "yes"; then
    AC_EGREP_CPP([gethostbyname_r],[
#include <sys/types.h>
#include <netdb.h>
    ],[
      tmp_gethostbyname_r="proto_declared"
    ],[
      AC_EGREP_CPP([gethostbyname_r],[
#define _REENTRANT
#include <sys/types.h>
#include <netdb.h>
      ],[
        tmp_gethostbyname_r="proto_needs_reentrant"
        tmp_need_reentrant="yes"
      ])
    ])
  fi
])


dnl CARES_CHECK_NEED_REENTRANT_GETPROTOBYNAME_R
dnl -------------------------------------------------
dnl Checks if the preprocessor _REENTRANT definition
dnl makes function getprotobyname_r compiler visible.

AC_DEFUN([CARES_CHECK_NEED_REENTRANT_GETPROTOBYNAME_R], [
  AC_LINK_IFELSE([
    AC_LANG_FUNC_LINK_TRY([getprotobyname_r])
  ],[
    tmp_getprotobyname_r="yes"
  ],[
    tmp_getprotobyname_r="no"
  ])
  if test "$tmp_getprotobyname_r" = "yes"; then
    AC_EGREP_CPP([getprotobyname_r],[
#include <sys/types.h>
#include <netdb.h>
    ],[
      tmp_getprotobyname_r="proto_declared"
    ],[
      AC_EGREP_CPP([getprotobyname_r],[
#define _REENTRANT
#include <sys/types.h>
#include <netdb.h>
      ],[
        tmp_getprotobyname_r="proto_needs_reentrant"
        tmp_need_reentrant="yes"
      ])
    ])
  fi
])


dnl CARES_CHECK_NEED_REENTRANT_GETSERVBYPORT_R
dnl -------------------------------------------------
dnl Checks if the preprocessor _REENTRANT definition
dnl makes function getservbyport_r compiler visible.

AC_DEFUN([CARES_CHECK_NEED_REENTRANT_GETSERVBYPORT_R], [
  AC_LINK_IFELSE([
    AC_LANG_FUNC_LINK_TRY([getservbyport_r])
  ],[
    tmp_getservbyport_r="yes"
  ],[
    tmp_getservbyport_r="no"
  ])
  if test "$tmp_getservbyport_r" = "yes"; then
    AC_EGREP_CPP([getservbyport_r],[
#include <sys/types.h>
#include <netdb.h>
    ],[
      tmp_getservbyport_r="proto_declared"
    ],[
      AC_EGREP_CPP([getservbyport_r],[
#define _REENTRANT
#include <sys/types.h>
#include <netdb.h>
      ],[
        tmp_getservbyport_r="proto_needs_reentrant"
        tmp_need_reentrant="yes"
      ])
    ])
  fi
])


dnl CARES_CHECK_NEED_REENTRANT_FUNCTIONS_R
dnl -------------------------------------------------
dnl Checks if the preprocessor _REENTRANT definition
dnl makes several _r functions compiler visible.
dnl Internal macro for CARES_CONFIGURE_REENTRANT.

AC_DEFUN([CARES_CHECK_NEED_REENTRANT_FUNCTIONS_R], [
  #
  tmp_need_reentrant="no"
  #
  if test "$tmp_need_reentrant" = "no"; then
    CARES_CHECK_NEED_REENTRANT_GMTIME_R
  fi
  if test "$tmp_need_reentrant" = "no"; then
    CARES_CHECK_NEED_REENTRANT_LOCALTIME_R
  fi
  if test "$tmp_need_reentrant" = "no"; then
    CARES_CHECK_NEED_REENTRANT_STRERROR_R
  fi
  if test "$tmp_need_reentrant" = "no"; then
    CARES_CHECK_NEED_REENTRANT_STRTOK_R
  fi
  if test "$tmp_need_reentrant" = "no"; then
    CARES_CHECK_NEED_REENTRANT_INET_NTOA_R
  fi
  if test "$tmp_need_reentrant" = "no"; then
    CARES_CHECK_NEED_REENTRANT_GETHOSTBYADDR_R
  fi
  if test "$tmp_need_reentrant" = "no"; then
    CARES_CHECK_NEED_REENTRANT_GETHOSTBYNAME_R
  fi
  if test "$tmp_need_reentrant" = "no"; then
    CARES_CHECK_NEED_REENTRANT_GETPROTOBYNAME_R
  fi
  if test "$tmp_need_reentrant" = "no"; then
    CARES_CHECK_NEED_REENTRANT_GETSERVBYPORT_R
  fi
])


dnl CARES_CONFIGURE_FROM_NOW_ON_WITH_REENTRANT
dnl -------------------------------------------------
dnl This macro ensures that configuration tests done
dnl after this will execute with preprocessor symbol
dnl _REENTRANT defined. This macro also ensures that
dnl the generated config file defines NEED_REENTRANT
dnl and that in turn setup.h will define _REENTRANT.
dnl Internal macro for CARES_CONFIGURE_REENTRANT.

AC_DEFUN([CARES_CONFIGURE_FROM_NOW_ON_WITH_REENTRANT], [
AC_DEFINE([NEED_REENTRANT], [1],
  [Define to 1 if _REENTRANT preprocessor symbol must be defined.])
cat >>confdefs.h <<_ACEOF
#ifndef _REENTRANT
#define _REENTRANT
#endif
_ACEOF
])


dnl CARES_CONFIGURE_REENTRANT
dnl -------------------------------------------------
dnl This first checks if the preprocessor _REENTRANT
dnl symbol is already defined. If it isn't currently
dnl defined a set of checks are performed to verify
dnl if its definition is required to make visible to
dnl the compiler a set of *_r functions. Finally, if
dnl _REENTRANT is already defined or needed it takes
dnl care of making adjustments necessary to ensure
dnl that it is defined equally for further configure
dnl tests and generated config file.

AC_DEFUN([CARES_CONFIGURE_REENTRANT], [
  AC_PREREQ([2.57])dnl
  #
  AC_MSG_CHECKING([if _REENTRANT is already defined])
  AC_COMPILE_IFELSE([
    AC_LANG_PROGRAM([[
    ]],[[
#ifdef _REENTRANT
      int dummy=1;
#else
      force compilation error
#endif
    ]])
  ],[
    AC_MSG_RESULT([yes])
    tmp_reentrant_initially_defined="yes"
  ],[
    AC_MSG_RESULT([no])
    tmp_reentrant_initially_defined="no"
  ])
  #
  if test "$tmp_reentrant_initially_defined" = "no"; then
    AC_MSG_CHECKING([if _REENTRANT is actually needed])
    CARES_CHECK_NEED_REENTRANT_FUNCTIONS_R
    if test "$tmp_need_reentrant" = "yes"; then
      AC_MSG_RESULT([yes])
    else
      AC_MSG_RESULT([no])
    fi
  fi
  #
  AC_MSG_CHECKING([if _REENTRANT is onwards defined])
  if test "$tmp_reentrant_initially_defined" = "yes" ||
    test "$tmp_need_reentrant" = "yes"; then
    CARES_CONFIGURE_FROM_NOW_ON_WITH_REENTRANT
    AC_MSG_RESULT([yes])
  else
    AC_MSG_RESULT([no])
  fi
  #
])