From 12c439860d5957d8bd963ffeca108698e960f2ea Mon Sep 17 00:00:00 2001
From: Skyler Saleh <skylersaleh@gmail.com>
Date: Sat, 17 Apr 2021 15:40:35 -0700
Subject: [PATCH] Apple M1: Only add x86 compile flags to x86 builds

- Removed -mssse3 flag from arm64 builds
- Removed -march=core2 from arm64 builds
---
 CMakeLists.txt | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5aed1f4fa2..a480467b3e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -314,9 +314,10 @@ if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
   set(CMAKE_XCODE_ATTRIBUTE_GCC_STRICT_ALIASING NO)
 
   # Specify target CPUs.
-  check_and_add_flag(HAVE_MSSSE3 -mssse3)
-  check_and_add_flag(HAVE_ARCH_CORE2 -march=core2)
-
+  if(_ARCH_64 AND CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64|amd64|AMD64")
+    check_and_add_flag(HAVE_MSSSE3 -mssse3)
+    check_and_add_flag(HAVE_ARCH_CORE2 -march=core2)
+  endif()
   # Linker flags.
   # Drop unreachable code and data.
   set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-dead_strip,-dead_strip_dylibs")