From 5e1b777ab504b5ab4428e5850bc03039f0e680ff Mon Sep 17 00:00:00 2001
From: Simon Ruderich <simon@ruderich.org>
Date: Wed, 1 Aug 2012 00:12:05 +0200
Subject: [PATCH] configure.ac: Use $CPPFLAGS for preprocessor flags.

---
 configure.ac | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index c71222a..db5285c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -26,7 +26,8 @@ AC_PROG_CC
 
 if test "x$GCC" = xyes; then
     CFLAGS="-std=c89 -pedantic -Wall -Wextra -Werror $CFLAGS"
-    CFLAGS="-D_XOPEN_SOURCE=500 -Wno-error=int-to-pointer-cast $CFLAGS"
+    CFLAGS="-Wno-error=int-to-pointer-cast $CFLAGS"
+    CPPFLAGS="-D_XOPEN_SOURCE=500 $CPPFLAGS"
     # Additional security flags.
     CFLAGS="$CFLAGS -Wformat -Wformat-security -Werror=format-security"
     CFLAGS="$CFLAGS -fstack-protector-all -Wstack-protector"
-- 
2.45.2