From 8b8f1eb94d4f4cb36654e8b634bad4fdc60ac567 Mon Sep 17 00:00:00 2001
From: Sebastian Ramacher <sebastian+dev@ramacher.at>
Date: Sat, 27 Apr 2013 22:03:15 +0200
Subject: Use AX_CHECK_COMPILE_FLAG to detect -maes

Signed-off-by: Sebastian Ramacher <sebastian+dev@ramacher.at>
---
 configure.ac | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/configure.ac b/configure.ac
index 16078ac..b62db5e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -48,18 +48,10 @@ AX_CHECK_COMPILE_FLAG([-Wall], [AX_APPEND_FLAG([-Wall])])
 AX_CHECK_COMPILE_FLAG([-Wextra], [AX_APPEND_FLAG([-Wextra])])
 AX_CHECK_COMPILE_FLAG([-Wno-missing-field-initializers], [AX_APPEND_FLAG([-Wno-missing-field-initializers])])
 AX_CHECK_COMPILE_FLAG([-Wno-unused-parameter], [AX_APPEND_FLAG([-Wno-unused-parameter])])
-
-# Checks for compiler flags.
-old_CFLAGS="$CFLAGS"
-CFLAGS=-maes
-AC_MSG_CHECKING([whether CC supports -maes])
-AC_COMPILE_IFELSE([AC_LANG_PROGRAM([])], [
-  AC_MSG_RESULT([yes])
-  AC_DEFINE(HAVE_MAES, [1], [Define if CC supports -maes])
-  have_maes=yes
-  ], [AC_MSG_RESULT([no])]
-)
-CFLAGS="$old_cflags"
+AX_CHECK_COMPILE_FLAG([-maes], [
+    have_maes=yes
+    AC_DEFINE(HAVE_MAES, [1], [Define if CC supports -maes])
+])
 
 # Checks for libraries.
 AC_ARG_WITH([gmp], AS_HELP_STRING([--without-gmp], [Build without gmp library (default: test)]))
-- 
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