Mesa (10.2): configure.ac: strip _GNU_SOURCE from llvm-config output

[Emil Velikov]

Module: Mesa
Branch: 10.2
Commit: e4752221679c4fd67d8b5688b5735d2a4d45275a
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=e4752221679c4fd67d8b5688b5735d2a4d45275a

Author: Jonathan Gray <jsg at jsg.id.au>
Date:   Sat Sep  6 01:44:41 2014 +1000

configure.ac: strip _GNU_SOURCE from llvm-config output

Mesa already defines _GNU_SOURCE for glibc based systems and defining
_GNU_SOURCE will break the Mesa build on other systems such as OpenBSD.

_GNU_SOURCE only seems to be included in llvm-config output when
LLVM is built via autoconf and not when it is built by cmake.

Cc: "10.2 10.3" <mesa-stable at lists.freedesktop.org>
Signed-off-by: Jonathan Gray <jsg at jsg.id.au>
(cherry picked from commit c68073e65f15b0df43bec2df1d7470ed4cddd761)

---

 configure.ac |    1 +
 1 file changed, 1 insertion(+)

diff --git a/configure.ac b/configure.ac
index 812cf65..c7212b7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1583,6 +1583,7 @@ strip_unwanted_llvm_flags() {
     # Use \> (marks the end of the word)
     echo `$1` | sed \
 	-e 's/-DNDEBUG\>//g' \
+	-e 's/-D_GNU_SOURCE\>//g' \
 	-e 's/-pedantic\>//g' \
 	-e 's/-Wcovered-switch-default\>//g' \
 	-e 's/-O.\>//g' \