include: curl/system.h is a run-time version of curlbuild.h

system.h is aimed to replace curlbuild.h at a later point in time when
we feel confident system.h works sufficiently well.

curl/system.h is currently used in parallel with curl/curlbuild.h

curl/system.h determines a data sizes, data types and include file
status based on available preprocessor defines instead of getting
generated at build-time. This, in order to avoid relying on a build-time
generated file that makes it complicated to do 32 and 64 bit bields from
the same installed set of headers.

Test 1541 verifies that system.h comes to the same conclusion that
curlbuild.h offers.

Closes #1373

4 files changed, 137 insertions, 2 deletions

diff --git a/tests/data/Makefile.inc b/tests/data/Makefile.inc
index e908c12b9..d89d53249 100644
--- a/tests/data/Makefile.inc
+++ b/tests/data/Makefile.inc
@@ -163,7 +163,7 @@ test1520 \
 \
 test1525 test1526 test1527 test1528 test1529 test1530 test1531 test1532 \
 test1533 test1534 test1535 test1536 \
-test1540 \
+test1540 test1541 \
 \
 test1600 test1601 test1602 test1603 test1604 test1605 \
 \
diff --git a/tests/data/test1541 b/tests/data/test1541
new file mode 100644
index 000000000..3d04cb4f9
--- /dev/null
+++ b/tests/data/test1541
@@ -0,0 +1,22 @@
+<testcase>
+<info>
+<keywords>
+typecheck
+</keywords>
+</info>
+
+#
+# Client-side
+<client>
+<server>
+none
+</server>
+ <name>
+verify curl/system.h detection
+ </name>
+<tool>
+lib1541
+</tool>
+</client>
+
+</testcase>
diff --git a/tests/libtest/Makefile.inc b/tests/libtest/Makefile.inc
index d85956d8b..66e2f1c6b 100644
--- a/tests/libtest/Makefile.inc
+++ b/tests/libtest/Makefile.inc
@@ -25,7 +25,7 @@ noinst_PROGRAMS = chkhostname libauthretry libntlmconnect                \
  lib1520 \
  lib1525 lib1526 lib1527 lib1528 lib1529 lib1530 lib1531 lib1532 lib1533 \
  lib1534 lib1535 lib1536 \
- lib1540 \
+ lib1540 lib1541 \
  lib1900 \
  lib2033
 
@@ -417,6 +417,10 @@ lib1540_SOURCES = lib1540.c $(SUPPORTFILES) $(TESTUTIL) $(WARNLESS)
 lib1540_LDADD = $(TESTUTIL_LIBS)
 lib1540_CPPFLAGS = $(AM_CPPFLAGS)
 
+lib1541_SOURCES = lib1541.c $(SUPPORTFILES) $(TESTUTIL) $(WARNLESS)
+lib1541_LDADD = $(TESTUTIL_LIBS)
+lib1541_CPPFLAGS = $(AM_CPPFLAGS)
+
 lib1900_SOURCES = lib1900.c $(SUPPORTFILES) $(TESTUTIL) $(WARNLESS)
 lib1900_LDADD = $(TESTUTIL_LIBS)
 lib1900_CPPFLAGS = $(AM_CPPFLAGS)
diff --git a/tests/libtest/lib1541.c b/tests/libtest/lib1541.c
new file mode 100644
index 000000000..ef993dd66
--- /dev/null
+++ b/tests/libtest/lib1541.c
@@ -0,0 +1,109 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2017, 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.
+ *
+ ***************************************************************************/
+#include "test.h"
+
+#include "testutil.h"
+#include "warnless.h"
+#include "memdebug.h"
+
+#define XSTR(x) #x
+#define STRING(y) XSTR(y)
+
+int test(char *URL)
+{
+  char detect[512];
+  char syst[512];
+
+  const char *types_h = "No";
+  const char *socket_h = "No";
+  const char *stypes_h = "No";
+  const char *ssocket_h = "No";
+
+  (void)(URL);
+
+#ifdef CURL_PULL_SYS_TYPES_H
+  types_h = "Yes";
+#endif
+#ifdef CURL_PULL_SYS_SOCKET_H
+  socket_h = "Yes";
+#endif
+  snprintf(detect, sizeof(detect),
+           "CURL_TYPEOF_CURL_OFF_T:     %s\n"
+           "CURL_FORMAT_CURL_OFF_T:     %s\n"
+           "CURL_FORMAT_CURL_OFF_TU:    %s\n"
+           "CURL_SUFFIX_CURL_OFF_T:     %s\n"
+           "CURL_SUFFIX_CURL_OFF_TU:    %s\n"
+           "CURL_SIZEOF_CURL_OFF_T:     %d\n"
+           "CURL_SIZEOF_LONG:           %d\n"
+           "CURL_TYPEOF_CURL_SOCKLEN_T: %s\n"
+           "CURL_PULL_SYS_TYPES_H:      %s\n"
+           "CURL_PULL_SYS_SOCKET_H:     %s\n"
+
+           , STRING(CURL_TYPEOF_CURL_OFF_T)
+           , CURL_FORMAT_CURL_OFF_T
+           , CURL_FORMAT_CURL_OFF_TU
+           , STRING(CURL_SUFFIX_CURL_OFF_T)
+           , STRING(CURL_SUFFIX_CURL_OFF_TU)
+           , CURL_SIZEOF_CURL_OFF_T
+           , CURL_SIZEOF_LONG
+           , STRING(CURL_TYPEOF_CURL_SOCKLEN_T)
+           , types_h
+           , socket_h);
+
+#ifdef CURLSYS_PULL_SYS_TYPES_H
+  stypes_h = "Yes";
+#endif
+#ifdef CURLSYS_PULL_SYS_SOCKET_H
+  ssocket_h = "Yes";
+#endif
+  snprintf(syst, sizeof(syst),
+           "CURL_TYPEOF_CURL_OFF_T:     %s\n"
+           "CURL_FORMAT_CURL_OFF_T:     %s\n"
+           "CURL_FORMAT_CURL_OFF_TU:    %s\n"
+           "CURL_SUFFIX_CURL_OFF_T:     %s\n"
+           "CURL_SUFFIX_CURL_OFF_TU:    %s\n"
+           "CURL_SIZEOF_CURL_OFF_T:     %d\n"
+           "CURL_SIZEOF_LONG:           %d\n"
+           "CURL_TYPEOF_CURL_SOCKLEN_T: %s\n"
+           "CURL_PULL_SYS_TYPES_H:      %s\n"
+           "CURL_PULL_SYS_SOCKET_H:     %s\n"
+
+           , STRING(CURLSYS_TYPEOF_CURL_OFF_T)
+           , CURLSYS_FORMAT_CURL_OFF_T
+           , CURLSYS_FORMAT_CURL_OFF_TU
+           , STRING(CURLSYS_SUFFIX_CURL_OFF_T)
+           , STRING(CURLSYS_SUFFIX_CURL_OFF_TU)
+           , CURLSYS_SIZEOF_CURL_OFF_T
+           , CURLSYS_SIZEOF_LONG
+           , STRING(CURLSYS_TYPEOF_CURL_SOCKLEN_T)
+           , stypes_h
+           , ssocket_h);
+
+  if(strcmp(detect, syst)) {
+    printf("===> Type detection failed <====\n");
+    printf("[Detected]\n%s", detect);
+    printf("[System]\n%s", syst);
+    return 1; /* FAIL! */
+  }
+
+  return 0;
+}