From bfc3e1ca7c0c1504c9873ee1baacce73330b037e Mon Sep 17 00:00:00 2001
From: Paul Smith <psmith@gnu.org>
Date: Sun, 13 Nov 2011 23:39:54 +0000
Subject: Enable high-resolution timestamps for Darwin (Mac OSX) Patch provided
 by Troy Runkel <Troy.Runkel@mathworks.com>

---
 acinclude.m4 | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

(limited to 'acinclude.m4')

diff --git a/acinclude.m4 b/acinclude.m4
index 0e56441..6d273e5 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -100,22 +100,24 @@ changequote([,])dnl
 
 dnl ---------------------------------------------------------------------------
 dnl From Paul Eggert <eggert@twinsun.com>
+dnl Update for Darwin by Troy Runkel <Troy.Runkel@mathworks.com>
 
 AC_DEFUN([AC_STRUCT_ST_MTIM_NSEC],
- [AC_CACHE_CHECK([for nanoseconds field of struct stat.st_mtim],
+ [AC_CACHE_CHECK([for nanoseconds field of struct stat],
    ac_cv_struct_st_mtim_nsec,
    [ac_save_CPPFLAGS="$CPPFLAGS"
     ac_cv_struct_st_mtim_nsec=no
-    # tv_nsec -- the usual case
-    # _tv_nsec -- Solaris 2.6, if
+    # st_mtim.tv_nsec -- the usual case
+    # st_mtim._tv_nsec -- Solaris 2.6, if
     #	(defined _XOPEN_SOURCE && _XOPEN_SOURCE_EXTENDED == 1
     #	 && !defined __EXTENSIONS__)
-    # st__tim.tv_nsec -- UnixWare 2.1.2
-    for ac_val in tv_nsec _tv_nsec st__tim.tv_nsec; do
+    # st_mtim.st__tim.tv_nsec -- UnixWare 2.1.2
+    # st_mtimespec.tv_nsec -- Darwin (Mac OSX)
+    for ac_val in st_mtim.tv_nsec st_mtim._tv_nsec st_mtim.st__tim.tv_nsec st_mtimespec.tv_nsec; do
       CPPFLAGS="$ac_save_CPPFLAGS -DST_MTIM_NSEC=$ac_val"
       AC_TRY_COMPILE([#include <sys/types.h>
 #include <sys/stat.h>
-	], [struct stat s; s.st_mtim.ST_MTIM_NSEC;],
+	], [struct stat s; s.ST_MTIM_NSEC;],
         [ac_cv_struct_st_mtim_nsec=$ac_val; break])
     done
     CPPFLAGS="$ac_save_CPPFLAGS"
-- 
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