[PATCH 1/3] configure.ac: check tv_nsec field in struct stat

[Reuben Hawkins <reubenhwk@gmail.com>]

This check will automatically set the correct NO_NSEC setting.
---
 configure.ac | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/configure.ac b/configure.ac
index 6af9647..dcc4bf0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -754,6 +754,18 @@ AC_CHECK_TYPES([struct itimerval],
 [#include <sys/time.h>])
 GIT_CONF_SUBST([NO_STRUCT_ITIMERVAL])
 #
+# Define USE_ST_TIMESPEC=YesPlease when stat.st_mtimespec.tv_nsec exist
+# Define NO_NSEC=YesPlease when neither stat.st_mtim.tv_nsec nor stat.st_mtimespec.tv_nsec exist
+AC_CHECK_MEMBER([struct stat.st_mtimespec.tv_nsec])
+AC_CHECK_MEMBER([struct stat.st_mtim.tv_nsec])
+if test x$ac_cv_member_struct_stat_st_mtimespec_tv_nsec = xyes ; then
+	USE_ST_TIMESPEC=YesPlease
+	GIT_CONF_SUBST([USE_ST_TIMESPEC])
+elif test x$ac_cv_member_struct_stat_st_mtim_tv_nsec != xyes ; then
+	NO_NSEC=YesPlease
+	GIT_CONF_SUBST([NO_NSEC])
+fi
+#
 # Define NO_D_INO_IN_DIRENT if you don't have d_ino in your struct dirent.
 AC_CHECK_MEMBER(struct dirent.d_ino,
 [NO_D_INO_IN_DIRENT=],
-- 
2.2.0.68.g8f72f0c.dirty