From 1d0e6cf47b5c888fea1d3014c01a12e487dfcf8d Mon Sep 17 00:00:00 2001
From: Jan Beich <jbeich@FreeBSD.org>
Date: Mon, 28 May 2018 21:19:52 +0000
Subject: [PATCH] Enable MMX/SSE in files using intrinsics

In file included from src/mmx_optimized.cpp:65:
/usr/include/clang/3.4.1/mmintrin.h:28:2: error: "MMX instruction set not enabled"
 #error "MMX instruction set not enabled"
  ^
src/mmx_optimized.cpp:73:11: error: unknown type name '__m64'
    const __m64 *pVec1, *pVec2;
          ^
src/mmx_optimized.cpp:82:15: error: always_inline function '_mm_cvtsi32_si64' requires target feature 'mmx', but would be inlined into function 'calcCrossCorr' that is compiled without support for 'mmx'
    shifter = _m_from_int(overlapDividerBitsNorm);
              ^
/usr/lib/clang/6.0.0/include/mmintrin.h:1512:21: note: expanded from macro '_m_from_int'
 #define _m_from_int _mm_cvtsi32_si64
                     ^
---
 CMakeLists.txt | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 17379f3..e00acd4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,3 +1,5 @@
+include(CheckCXXCompilerFlag)
+
 set(SRCS
 	src/AAFilter.cpp
 	src/BPMDetect.cpp
@@ -14,5 +16,18 @@ set(SRCS
 	src/sse_optimized.cpp
 	src/TDStretch.cpp)
 
+if(NOT MSVC)
+	check_cxx_compiler_flag(-mmmx SOUNDTOUCH_HAS_MMMX)
+	check_cxx_compiler_flag(-msse SOUNDTOUCH_HAS_MSSE)
+	if(SOUNDTOUCH_HAS_MMMX)
+		set_source_files_properties(src/mmx_optimized.cpp
+					    PROPERTIES COMPILE_FLAGS "-mmmx")
+	endif()
+	if(SOUNDTOUCH_HAS_MSSE)
+		set_source_files_properties(src/sse_optimized.cpp
+					    PROPERTIES COMPILE_FLAGS "-msse")
+	endif()
+endif()
+
 add_library(SoundTouch STATIC ${SRCS})
 target_include_directories(SoundTouch PUBLIC include PRIVATE src)