diff options
| -rw-r--r-- | configure.ac | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac index 53adee922a..8acce4d167 100644 --- a/configure.ac +++ b/configure.ac @@ -293,7 +293,24 @@ AC_C_BIGENDIAN dnl No fork on MinGW, disable some self-tests until we fix them. dnl Check clock_gettime and pthread_mutex_lock in libc (avoid linking to other libs) -AC_CHECK_FUNCS([fork setitimer inet_ntop inet_pton getrusage getpwuid_r nanosleep daemon getpid clock_gettime localtime fmemopen vasprintf mmap],,) +AC_CHECK_FUNCS([fork setitimer inet_ntop inet_pton getrusage getpwuid_r nanosleep daemon getpid localtime vasprintf mmap],,) +dnl Manually check some functions by including headers first. On macOS, you +dnl normally only have the latest SDK available, containing all existing +dnl functions, but having them restricted according to target version in +dnl headers. If we bypass the headers and just try linking (as AC_CHECK_FUNCS +dnl does), we will accidentally detect functions which we shouldn't use. Set +dnl ac_cv_func_* as well, to avoid later AC_CHECK_FUNCS from other included +dnl scripts from overriding it. +AC_MSG_CHECKING([for clock_gettime]) +AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <time.h>], [clock_gettime(0, 0);])], + [AC_MSG_RESULT(yes); ac_cv_func_clock_gettime=yes + AC_DEFINE([HAVE_CLOCK_GETTIME], 1, [Define to 1 if you have the `clock_gettime' function.])], + [AC_MSG_RESULT(no); ac_cv_func_clock_gettime=no]) +AC_MSG_CHECKING([for fmemopen]) +AC_LINK_IFELSE([AC_LANG_PROGRAM([#include <stdio.h>], [fmemopen(0, 0, 0);])], + [AC_MSG_RESULT(yes); ac_cv_func_fmemopen=yes + AC_DEFINE([HAVE_FMEMOPEN], 1, [Define to 1 if you have the `fmemopen' function.])], + [AC_MSG_RESULT(no); ac_cv_func_fmemopen=no]) if test "$ac_cv_func_vasprintf" != "yes";then AC_MSG_CHECKING([for va_copy]) AC_LINK_IFELSE([AC_LANG_PROGRAM([ |