From 6b71fea1f4173993d72af291210c2dead796f942 Mon Sep 17 00:00:00 2001
From: Dipal M Zambare <DipalMadhukar.Zambare@amd.com>
Date: Mon, 5 Sep 2022 11:41:36 +0530
Subject: [PATCH] GCC 8 support for zen4 (and amdzen) configuration

- Added check for GCC version 8,
- Added AVX512 compiler flags needed for zen4 build using GCC 8.

AMD-Internal: [CPUPL-2494]
Change-Id: I7fd72e4b197fdd754633f674a8b87f01da8dd320
---
 config/zen4/make_defs.mk | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/config/zen4/make_defs.mk b/config/zen4/make_defs.mk
index d5d13167a..501ace287 100644
--- a/config/zen4/make_defs.mk
+++ b/config/zen4/make_defs.mk
@@ -86,10 +86,15 @@ ifeq ($(shell test $(GCC_VERSION) -ge 9; echo $$?),0)
 CKVECFLAGS     +=  -march=znver2 -mavx512f -mavx512dq -mavx512bw -mavx512vl -mavx512vnni -mfpmath=sse
 CRVECFLAGS     +=  -march=znver2
 else
-# If gcc is older than 9.1.0 but at least 6.1.0, then we can use -march=znver1
+ifeq ($(shell test $(GCC_VERSION) -ge 8; echo $$?),0)
+CKVECFLAGS     +=  -march=znver1 -mavx512f -mavx512dq -mavx512bw -mavx512vl -mavx512vnni -mfpmath=sse
+CRVECFLAGS     +=  -march=znver1
+else
+# If gcc is older than 8.0.0 but at least 6.1.0, then we can use -march=znver1
 # as the fallback option.
 CKVECFLAGS += -march=znver1 -mno-avx256-split-unaligned-store
 CRVECFLAGS += -march=znver1 -mno-avx256-split-unaligned-store
+endif # GCC 8
 endif # GCC 9
 endif # GCC 11
 endif # GCC 12