From 2e151f21b18968d393b1cff3de02e1abf208d092 Mon Sep 17 00:00:00 2001
From: Serge Aleynikov <saleyn@gmail.com>
Date: Thu, 28 Mar 2024 22:46:50 -0400
Subject: [PATCH] Fix issue #175

---
 c_src/Makefile | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/c_src/Makefile b/c_src/Makefile
index 345c9bd..76121c4 100644
--- a/c_src/Makefile
+++ b/c_src/Makefile
@@ -70,8 +70,14 @@ HAVE_FORMAT ?= $(C20_FEATURES)
 HAVE_SRCLOC ?= $(C20_FEATURES)
 
 ifeq ($(UNAME_SYS),linux)
+  ifeq ($(shell gcc -march=native -dM -E - </dev/null | awk '/__AVX2__/ { print $$3 }'),1)
+    CXXFLAGS += -mavx2
+  else ifeq ($(shell gcc -march=native -dM -E - </dev/null | awk '/__AVX__/ { print $$3 }'),1)
+    CXXFLAGS += -mavx
+  endif
+
   SYSROOT  := $(shell $(CXX) -print-sysroot)
-  CXXFLAGS += -mavx2 -DHAVE_SETRESUID -DHAVE_PIPE2 $(X64)
+  CXXFLAGS += -DHAVE_SETRESUID -DHAVE_PIPE2 $(X64)
   # Check for Linux capability API (Install package: libcap-devel)
   ifneq ($(wildcard $(SYSROOT)/usr/include/sys/capability.h),)
     CXXFLAGS += -DHAVE_CAP