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| author | Florian Weimer <fweimer@redhat.com> | 2023-06-14 14:41:04 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2023-06-14 21:41:04 +0900 |
| commit | 52d5988afb5999c71fd24484a93efefa2a9e9a8f (patch) | |
| tree | b1ff98bafdac8cfc45fea6ea7655d1d3b4da24ed | |
| parent | 9cb69ad5a57f95bf714752d2e3061d4829d51f8a (diff) | |
C99 compatibility enhancements for the configure script (#2519)
* configure.ac: Enable system extensions
Use AC_USE_SYSTEM_EXTENSIONS to build with _GNU_SOURCE (and similar
macros on non-GNU systems), to avoid an implicit declaration of the
strptime function. This improves compatibility with future compilers
which do not support implicit function declarations.
* configure.ac: gettimeofday lives in <sys/time.h>
The gettimeofday function is declared in <sys/time.h>, not <time.h>,
according to POSIX and actual systems. This avoids a configure
probe failure with compilers which do not support implicit function
declarations.
| -rw-r--r-- | configure.ac | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac index 78383a6d..6c08626e 100644 --- a/configure.ac +++ b/configure.ac @@ -16,6 +16,7 @@ AC_PROG_CPP_WERROR AC_PROG_YACC AC_OBJEXT AC_EXEEXT +AC_USE_SYSTEM_EXTENSIONS LT_INIT([shared static win32-dll]) AM_PROG_CC_C_O @@ -144,7 +145,7 @@ AC_FIND_FUNC([gmtime_r], [c], [#include <time.h>], [0, 0]) AC_FIND_FUNC([gmtime], [c], [#include <time.h>], [0]) AC_FIND_FUNC([localtime_r], [c], [#include <time.h>], [0, 0]) AC_FIND_FUNC([localtime], [c], [#include <time.h>], [0]) -AC_FIND_FUNC([gettimeofday], [c], [#include <time.h>], [0, 0]) +AC_FIND_FUNC([gettimeofday], [c], [#include <sys/time.h>], [0, 0]) AC_CHECK_MEMBER([struct tm.tm_gmtoff], [AC_DEFINE([HAVE_TM_TM_GMT_OFF],1,[Define to 1 if the system has the tm_gmt_off field in struct tm])], [], [[#include <time.h>]]) AC_CHECK_MEMBER([struct tm.__tm_gmtoff], [AC_DEFINE([HAVE_TM___TM_GMT_OFF],1,[Define to 1 if the system has the __tm_gmt_off field in struct tm])], |