From f5243e8e1fc585147e8b6e1553232f5f868eff1d Mon Sep 17 00:00:00 2001
From: Martin Kroeker <martin@ruby.chemie.uni-freiburg.de>
Date: Sat, 30 Jun 2018 23:47:44 +0200
Subject: [PATCH] Add compiler option to avx512 test and hide test output

---
 c_check | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/c_check b/c_check
index cc64c16c6..3831d7aa3 100644
--- a/c_check
+++ b/c_check
@@ -205,8 +205,8 @@ $no_avx512= 0;
 if (($architecture eq "x86") || ($architecture eq "x86_64")) {
     $code = '"vbroadcastss -4 * 4(%rsi), %zmm2"';
     print $tmpf "int main(void){ __asm__ volatile($code); }\n";
-    $args = " -o $tmpf.o -x c $tmpf";
-    my @cmd = ("$compiler_name $args");
+    $args = " -march=skylake-avx512 -o $tmpf.o -x c $tmpf";
+    my @cmd = ("$compiler_name $args >/dev/null 2>/dev/null");
     system(@cmd) == 0;
     if ($? != 0) {
 	$no_avx512 = 1;