From 0d778ef1bac0719b8aa554722f0372b4008f4f9a Mon Sep 17 00:00:00 2001
From: Ben Fuhrmannek
Date: Mon, 11 Apr 2016 13:33:34 +0200
Subject: /bin/sh compatibility (fixes #10)

---
 config.m4 | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/config.m4 b/config.m4
index a6dade9..dddea2a 100644
--- a/config.m4
+++ b/config.m4
@@ -29,7 +29,7 @@ fi
 
 AC_MSG_CHECKING([for C11 support with -std=c11])
 old_CFLAGS="$CFLAGS"
-CFLAGS+=" -std=c11"
+CFLAGS="${CFLAGS} -std=c11"
 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],[AC_MSG_RESULT([yes])],[
 	AC_MSG_RESULT([no])
 	CFLAGS="$old_CFLAGS"
@@ -38,7 +38,7 @@ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],[AC_MSG_RESULT([yes])],[
 	echo "  support. Trying C99 instead, but compiling may fail."
 	echo "=========================================================="
 	AC_MSG_CHECKING([for C99 support with -std=c99])
-	CFLAGS+=" -std=c99"
+	CFLAGS="${CFLAGS} -std=c99"
 	AC_COMPILE_IFELSE([AC_LANG_PROGRAM([],[])],[AC_MSG_RESULT([yes])],[
 		AC_MSG_RESULT([no])
 		CFLAGS="$old_CFLAGS"
-- 
cgit v1.3