[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 | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/configure.ac b/configure.ac
index 6af9647..3cfdd51 100644
--- a/configure.ac
+++ b/configure.ac
@@ -754,6 +754,25 @@ AC_CHECK_TYPES([struct itimerval],
 [#include <sys/time.h>])
 GIT_CONF_SUBST([NO_STRUCT_ITIMERVAL])
 #
+# Define HAVE_ST_MTIM=No if you don't have struct stat.st_mtim.tv_nsec.
+AC_CHECK_MEMBER([struct stat.st_mtim.tv_nsec],
+[HAVE_ST_MTIM=Yes],
+[HAVE_ST_MTIM=No],
+[#include <sys/stat.h>])
+#
+# Define HAVE_ST_MTIMESPEC=No if you don't have struct stat.st_mtimespec.tv_nsec.
+AC_CHECK_MEMBER([struct stat.st_mtimespec.tv_nsec],
+[HAVE_ST_MTIMESPEC=Yes],
+[HAVE_ST_MTIMESPEC=No],
+[#include <sys/stat.h>])
+#
+# Define NO_NSEC if both HAVE_ST_MTIMESPEC and HAVE_ST_MTIM are set to No.
+if test '(' "$HAVE_ST_MTIM" = "No" ')' -a '(' "$HAVE_ST_MTIMESPEC" = "No" ')' ; 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.GIT