From b64c0510b32bb6a03c1b43d8a4718067f08e70aa Mon Sep 17 00:00:00 2001
From: Maryam Tahhan <maryam.tahhan@intel.com>
Date: Tue, 7 Jun 2016 12:31:44 +0100
Subject: [PATCH] configure: check AVX support

Check AVX support before adding -mavx flag.

Change-Id: I2de2a12704126590ef991de89880ad5bd5c3805e
Signed-off-by: Maryam Tahhan <maryam.tahhan@intel.com>
---
 configure.ac | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 09882996..5b7a9505 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2457,7 +2457,25 @@ then
         then
 	    AC_MSG_ERROR([cannot link with dpdk in $DPDK_LIB_DIR])
 	fi
-	BUILD_WITH_DPDK_CFLAGS="-mavx -fPIC -I$DPDK_INCLUDE"
+	BUILD_WITH_DPDK_CFLAGS=""
+	AC_MSG_NOTICE([Checking for avx instructions])
+	AC_RUN_IFELSE(
+		[AC_LANG_PROGRAM(
+[[
+#include <immintrin.h>
+]],
+[[
+__m128i zero = _mm_setzero_si128();
+]]
+	)],
+		[HAVE_AVX=true], [HAVE_AVX=false])
+	if test "x$HAVE_AVX" = "xtrue"
+	then
+		BUILD_WITH_DPDK_CFLAGS="-mavx "
+		AC_MSG_NOTICE([avx instructions supported])
+	fi
+
+	BUILD_WITH_DPDK_CFLAGS+="-fPIC -I$DPDK_INCLUDE"
 	if test "x$LOCAL_DPDK_INSTALL" != "xtrue"
         then
 		BUILD_WITH_DPDK_LDFLAGS="-Wl,--no-as-needed"
-- 
2.11.0