From 465db6c4fec5c1e491e83db3050aa1cb03c03c11 Mon Sep 17 00:00:00 2001
From: "Ben \"root\" Anderson" <roothorick@gmail.com>
Date: Tue, 27 Jan 2015 17:04:33 -0600
Subject: [PATCH] Check whether a real librt is present and use it if necessary

---
 configure.ac | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/configure.ac b/configure.ac
index 230986785f..e3d9f78c06 100644
--- a/configure.ac
+++ b/configure.ac
@@ -202,6 +202,11 @@ if test "$with_prof" = "yes"; then
 	test "$DEFAULT_LDFLAGS" = "yes" && LDFLAGS="$LDFLAGS -pg"
 fi
 
+dnl Usually in libc, but not always(?)
+if test "$unix" = "yes"; then
+	AC_SEARCH_LIBS(clock_gettime, rt,, AC_ERROR([clock_gettime() not available?]))
+fi
+
 SM_OPENGL
 SM_X11
 GL_CFLAGS="$GL_CFLAGS $XCFLAGS"