From 1d93541617d150b05ec89dc428c130c8efdf5db8 Mon Sep 17 00:00:00 2001
From: DRC <information@libjpeg-turbo.org>
Date: Fri, 1 Sep 2017 13:52:21 +0000
Subject: [PATCH] Build: Use -maltivec when testing AltiVec support

Doesn't seem to be necessary with recent Linux/GCC configurations, but
it is definitely necessary with OS X.
---
 simd/CMakeLists.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/simd/CMakeLists.txt b/simd/CMakeLists.txt
index 252d238..3976a58 100755
--- a/simd/CMakeLists.txt
+++ b/simd/CMakeLists.txt
@@ -284,6 +284,8 @@ endif()
 
 elseif(CPU_TYPE STREQUAL "powerpc")
 
+set(CMAKE_REQUIRED_FLAGS -maltivec)
+
 check_c_source_compiles("
   #include <altivec.h>
   int main(void) {
@@ -291,6 +293,8 @@ check_c_source_compiles("
     return vi[0];
   }" HAVE_ALTIVEC)
 
+unset(CMAKE_REQUIRED_FLAGS)
+
 if(NOT HAVE_ALTIVEC)
   simd_fail("SIMD extensions not available for this CPU (PowerPC SPE)")
   return()
-- 
2.50.1