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Codechange: [OSX] Prevent the compiler from using SSE4 instructions unless we want to. #8476

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merged 1 commit into from Jan 2, 2021
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Codechange: [OSX] Prevent the compiler from using SSE4 instructions unless we want to. #8476

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12 changes: 12 additions & 0 deletions cmake/CompileFlags.cmake
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Expand Up @@ -127,6 +127,18 @@ macro(compile_flags)
"$<$<BOOL:${LIFETIME_DSE_FOUND}>:-flifetime-dse=1>"
)
endif()

if(CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang")
include(CheckCXXCompilerFlag)
check_cxx_compiler_flag("-mno-sse4" NO_SSE4_FOUND)

if(NO_SSE4_FOUND)
add_compile_options(
# Don't use SSE4 for general sources to increase compatibility.
-mno-sse4
)
endif()
endif()
elseif(CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
add_compile_options(
-Wall
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