From 7b257524a40be3c77fcd4f1f7b1f7691c4344b38 Mon Sep 17 00:00:00 2001
From: Steven Noonan <steven@valvesoftware.com>
Date: Wed, 17 Oct 2018 14:27:24 -0700
Subject: [PATCH] makefile_base: use -march=nocona instead of individual -m$isa
 flags

Also use instruction scheduling model for Haswell if available.

Signed-off-by: Steven Noonan <steven@valvesoftware.com>
---
 build/makefile_base.mak | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/build/makefile_base.mak b/build/makefile_base.mak
index 611f8a16..ad2bf38f 100644
--- a/build/makefile_base.mak
+++ b/build/makefile_base.mak
@@ -47,6 +47,10 @@ endif
 export CC
 export CXX
 
+cc-option = $(shell if test -z "`echo 'void*p=1;' | \
+              $(1) $(2) -S -o /dev/null -xc - 2>&1 | grep -- $(2) -`"; \
+              then echo "$(2)"; else echo "$(3)"; fi ;)
+
 # Selected container mode shell
 DOCKER_SHELL_BASE = docker run --rm --init -v $(HOME):$(HOME) -w $(CURDIR) -e HOME=$(HOME) \
                                     -v /etc/passwd:/etc/passwd:ro -u $(shell id -u):$(shell id -g) -h $(shell hostname) \
@@ -132,7 +136,7 @@ STRIP := strip
 WINE32_AUTOCONF :=
 WINE64_AUTOCONF :=
 
-OPTIMIZE_FLAGS := -O2 -mmmx -msse -msse2 -mfpmath=sse
+OPTIMIZE_FLAGS := -O2 -march=nocona $(call cc-option,$(CC),-mtune=core-avx2,) -mfpmath=sse
 
 # Use $(call QUOTE,$(VAR)) to flatten a list to a single element (for feeding to a shell)