From d1de3dda8efe501d4192c8a99c34ab4265316c32 Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Mon, 17 Mar 2008 14:22:39 -0700
Subject: [PATCH] Fix clock_gettime presence detect on FreeBSD.

For non-Linux, _POSIX_C_SOURCE and friends restrict symbols defined rather
than enabling defines of symbols.  Additionally, CLOCK_MONOTONIC was
apparently added to the standard around 2000 anyway, not 1993.
---
 configure.ac | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/configure.ac b/configure.ac
index 985c8e227..1431f4b8f 100644
--- a/configure.ac
+++ b/configure.ac
@@ -722,7 +722,9 @@ if ! test "x$have_clock_gettime" = xno; then
     LIBS="$CLOCK_LIBS"
 
     AC_RUN_IFELSE([
+#ifdef __linux__
 #define _POSIX_C_SOURCE 199309L
+#endif
 #include <time.h>
 
 int main(int argc, char *argv[[]]) {