From d11b39ea274edea1fe4aab87791101da0783be3c Mon Sep 17 00:00:00 2001
From: Benjamin Otte <otte@redhat.com>
Date: Fri, 20 May 2011 20:57:33 +0200
Subject: [PATCH] build: Use $GREP -e instead of plain grep -e

https://bugs.freedesktop.org/show_bug.cgi?id=37388
---
 build/configure.ac.warnings | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/build/configure.ac.warnings b/build/configure.ac.warnings
index a43ae8940..3eb0104be 100644
--- a/build/configure.ac.warnings
+++ b/build/configure.ac.warnings
@@ -69,8 +69,9 @@ CAIRO_CFLAGS="$CAIRO_CFLAGS $WARN_CFLAGS"
 # gcc from generating thousands of warnings about the misapplication of the
 # attribute to void functions and variables.
 AC_CACHE_CHECK([how to enable unused result warnings], cairo_cv_warn_unused_result, [
+        AC_REQUIRE([AC_PROG_GREP])
 	cairo_cv_warn_unused_result=""
-	if echo $WARN_CFLAGS | grep -e '-Wno-attributes' >/dev/null; then
+	if echo $WARN_CFLAGS | $GREP -e '-Wno-attributes' >/dev/null; then
 	    CAIRO_CC_TRY_FLAG_SILENT(
 			[-Wno-attributes],
 			[__attribute__((__warn_unused_result__)) void f (void) {}