From 9f251e8e612ca766644cff91f15c83c6b3fcce6e Mon Sep 17 00:00:00 2001
From: Mooneer Salem <mooneer@gmail.com>
Date: Sat, 19 Aug 2023 11:29:24 -0700
Subject: [PATCH] Suppress compiler warnings for ARM Macs.

---
 CMakeLists.txt | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 92cfd88..bae81ba 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -128,7 +128,8 @@ if(NOT DISABLE_CPU_OPTIMIZATION)
                 
             # Unlike with the above, NEON *is* guaranteed if on ARM as there were never any ARM32 Macs 
             # available. We don't need any specific compiler flags for this, though.
-            set(NEON_PRESENT TRUE)
+            execute_process(COMMAND sysctl -a COMMAND grep -c hw.optional.neon
+                OUTPUT_VARIABLE NEON_PRESENT)
         endif(BUILD_OSX_UNIVERSAL)
     elseif(WIN32)
         message(STATUS "No detection capability on Windows, assuming AVX is available.")
@@ -165,7 +166,7 @@ elseif(${SSE} AND (${SSE_PRESENT} OR ${SSE_PRESENT} GREATER 0))
 # AVX and AVX2 machines will also match on SSE
     message(STATUS "sse processor flags found or enabled.")
     set(LPCNET_C_PROC_FLAGS -msse4.1)
-elseif(${NEON} AND (${NEON_PRESENT} OR ${NEON_PRESENT} GREATER 0))
+elseif(${NEON} AND (${NEON_PRESENT} OR ${NEON_PRESENT} GREATER 0) AND NOT APPLE)
     # RPi / ARM 32bit
     message(STATUS "neon processor flags found or enabled.")
     set(LPCNET_C_PROC_FLAGS -mfpu=neon -march=armv8-a -mtune=cortex-a53)