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Add -msse2 to compile flags on x86 only if necessary

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heinrich5991 2019-02-10 19:14:04 +01:00
parent e6170cd1f0
commit 732b003b8d
1 changed files with 8 additions and 1 deletions
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9
CMakeLists.txt
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@ -145,11 +145,18 @@ if(NOT MSVC)
# Inaccurate floating point numbers cause problems on mingw-w64-gcc when
# compiling for x86, might cause problems elsewhere. So don't store floats
# in registers but keep them at higher accuracy.
if(TARGET_ARCH STREQUAL "x86")
add_c_compiler_flag_if_supported(OUR_FLAGS -ffloat-store)
endif()
# gcc < 4.10 chokes on _mm_pause on x86 without SSE support.
if(TARGET_ARCH STREQUAL "x86")
check_c_source_compiles("#include <immintrin.h>\nint main() { _mm_pause(); return 0; }" MM_PAUSE_WORKS_WITHOUT_MSSE2)
if(NOT MM_PAUSE_WORKS_WITHOUT_MSSE2)
add_c_compiler_flag_if_supported(OUR_FLAGS -msse2)
endif()
endif()
if(TARGET_OS STREQUAL "mac")
add_c_compiler_flag_if_supported(OUR_FLAGS -stdlib=libc++)
add_c_compiler_flag_if_supported(OUR_FLAGS -mmacosx-version-min=10.7)