* m4/stat-time.m4 (STATE_TIMESPEC, STAT_TIMESPEC_NS): Add check for

[gnulib.git] / m4 / stat-time.m4

diff --git a/m4/stat-time.m4 b/m4/stat-time.m4
index 0f42f67..89a7aa4 100644 (file)
--- a/m4/stat-time.m4
+++ b/m4/stat-time.m4
@@ -20,7 +20,36 @@ AC_DEFUN([gl_STAT_TIME],
   AC_REQUIRE([AC_C_INLINE])
   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
 
-  AC_CHECK_MEMBERS([struct stat.st_atim.tv_nsec], [],
+  AC_CHECK_MEMBERS([struct stat.st_atim.tv_nsec],
+    [AC_CACHE_CHECK([whether struct stat.st_atim is of type struct timespec],
+       [ac_cv_typeof_struct_stat_st_atim_is_struct_timespec],
+       [AC_TRY_COMPILE(
+         [
+           #include <sys/types.h>
+           #if TIME_WITH_SYS_TIME
+           # include <sys/time.h>
+           # include <time.h>
+           #else
+           # if HAVE_SYS_TIME_H
+           #  include <sys/time.h>
+           # else
+           #  include <time.h>
+           # endif
+           #endif
+           #include <sys/stat.h>
+           struct timespec ts;
+           struct stat st;
+         ],
+         [
+           st.st_atim = ts;
+         ],
+         [ac_cv_typeof_struct_stat_st_atim_is_struct_timespec=yes],
+         [ac_cv_typeof_struct_stat_st_atim_is_struct_timespec=no])])
+     if test $ac_cv_typeof_struct_stat_st_atim_is_struct_timespec = yes; then
+       AC_DEFINE([TYPEOF_STRUCT_STAT_ST_ATIM_IS_STRUCT_TIMESPEC], 1,
+         [Define to 1 if the type of the st_atim member of a struct stat is
+         struct timespec.])
+     fi],
     [AC_CHECK_MEMBERS([struct stat.st_atimespec.tv_nsec], [],
        [AC_CHECK_MEMBERS([struct stat.st_atimensec], [],
          [AC_CHECK_MEMBERS([struct stat.st_atim.st__tim.tv_nsec], [],