From 69cfe28f315b559cb1a07c0806266aa2850b5d4b Mon Sep 17 00:00:00 2001
From: Joost VandeVondele <Joost.VandeVondele@gmail.com>
Date: Wed, 12 Aug 2020 17:21:12 +0200
Subject: [PATCH 1/1] Output the SSE2 flag in compiler_info

was missing in the list of outputs, slightly reorder flags.
explicitly add -msse2 if USE_SSE2 (is implicit already, -msse -m64).

closes https://github.com/official-stockfish/Stockfish/pull/2990

No functional change.
---
 src/Makefile | 2 +-
 src/misc.cpp | 8 ++++++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/Makefile b/src/Makefile
index 0804cdd5..027cc3e3 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -468,7 +468,7 @@ ifeq ($(neon),yes)
 endif
 
 ifeq ($(arch),x86_64)
-	CXXFLAGS += -DUSE_SSE2
+	CXXFLAGS += -msse2 -DUSE_SSE2
 endif
 
 ### 3.7 pext
diff --git a/src/misc.cpp b/src/misc.cpp
index ab52d30b..1cee4726 100644
--- a/src/misc.cpp
+++ b/src/misc.cpp
@@ -225,6 +225,7 @@ const std::string compiler_info() {
   #if defined(USE_AVX512)
     compiler += " AVX512";
   #endif
+  compiler += (HasPext ? " BMI2" : "");
   #if defined(USE_AVX2)
     compiler += " AVX2";
   #endif
@@ -234,11 +235,14 @@ const std::string compiler_info() {
   #if defined(USE_SSSE3)
     compiler += " SSSE3";
   #endif
-    compiler += (HasPext ? " BMI2" : "");
-    compiler += (HasPopCnt ? " POPCNT" : "");
+  #if defined(USE_SSE2)
+    compiler += " SSE2";
+  #endif
+  compiler += (HasPopCnt ? " POPCNT" : "");
   #if defined(USE_MMX)
     compiler += " MMX";
   #endif
+
   #if !defined(NDEBUG)
     compiler += " DEBUG";
   #endif
-- 
2.39.2