From 6733af8d6f77959c2daff77db70c14129cb9419d Mon Sep 17 00:00:00 2001
From: Alexey Marchuk <alexeymar@nvidia.com>
Date: Tue, 29 Nov 2022 16:37:44 +0100
Subject: [PATCH] mk: Check if compiler supports -mno-avx512f

Some old compilers like gcc 4.8.5 don't support
this flag, that leads to compilation failure.
Add a check that the compiler supports the flag,
it will allow to compile SPDK with old versions
of gcc

Signed-off-by: Alexey Marchuk <alexeymar@nvidia.com>
Change-Id: I80fd6e4f1f792be107ecac593318e1da877219c4
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/15688
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Mellanox Build Bot
Reviewed-by: Shuhei Matsumoto <smatsumoto@nvidia.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Konrad Sztyber <konrad.sztyber@intel.com>
---
 mk/spdk.common.mk | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mk/spdk.common.mk b/mk/spdk.common.mk
index 1a5608658..59a6c41f4 100644
--- a/mk/spdk.common.mk
+++ b/mk/spdk.common.mk
@@ -71,11 +71,13 @@ COMMON_CFLAGS += -march=$(TARGET_ARCHITECTURE)
 endif
 
 ifeq ($(TARGET_MACHINE),x86_64)
+ifneq (,$(shell $(CC) --target-help | grep -qe -mavx512f && echo 1))
 # Don't use AVX-512 instructions in SPDK code - it breaks Valgrind for
 # some cases where compiler decides to hyper-optimize a relatively
 # simple operation (like int-to-float converstion) using AVX-512
 COMMON_CFLAGS += -mno-avx512f
 endif
+endif
 
 ifeq ($(CONFIG_WERROR), y)
 COMMON_CFLAGS += -Werror