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f4daa9f527
1. Correctly detect ON state so that host is not built as -march=native by default. 2. Merge OFF and GENERIC options as we need at least -march=nehalem to build properly.
30 lines
1.2 KiB
CMake
30 lines
1.2 KiB
CMake
set(OPTIMIZE_FOR_NATIVE AUTO CACHE STRING "Build with -march=native")
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set_property(CACHE OPTIMIZE_FOR_NATIVE PROPERTY STRINGS AUTO ON OFF)
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set(OPTIMIZE_FOR_NATIVE_ARCH "none")
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if(OPTIMIZE_FOR_NATIVE STREQUAL "ON" OR (OPTIMIZE_FOR_NATIVE STREQUAL "AUTO" AND OPTIMIZE_FOR_NATIVE_DEFAULT))
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CHECK_C_COMPILER_FLAG("-march=native" COMPILER_SUPPORTS_MARCH_NATIVE)
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if(COMPILER_SUPPORTS_MARCH_NATIVE)
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set(OPTIMIZE_FOR_NATIVE_ARCH "native")
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set(OPTIMIZE_FOR_NATIVE_ON ON)
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endif()
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elseif(OPTIMIZE_FOR_NATIVE STREQUAL "AUTO" OR OPTIMIZE_FOR_NATIVE STREQUAL "OFF")
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CHECK_C_COMPILER_FLAG("-march=x86-64-v2" COMPILER_SUPPORTS_MARCH_X86_64_V2)
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if(COMPILER_SUPPORTS_MARCH_X86_64_V2)
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set(OPTIMIZE_FOR_NATIVE_ARCH "x86-64-v2")
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else()
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CHECK_C_COMPILER_FLAG("-march=nehalem" COMPILER_SUPPORTS_MARCH_NEHALEM)
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if(COMPILER_SUPPORTS_MARCH_NEHALEM)
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set(OPTIMIZE_FOR_NATIVE_ARCH "nehalem")
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endif()
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endif()
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else()
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set(OPTIMIZE_FOR_NATIVE_ARCH "${OPTIMIZE_FOR_NATIVE}")
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set(OPTIMIZE_FOR_NATIVE_ON ON)
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endif()
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if(NOT OPTIMIZE_FOR_NATIVE_ARCH STREQUAL "none")
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add_compile_options("-march=${OPTIMIZE_FOR_NATIVE_ARCH}")
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endif()
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add_feature_info(OPTIMIZE_FOR_NATIVE OPTIMIZE_FOR_NATIVE_ON "Optimized for ${OPTIMIZE_FOR_NATIVE_ARCH}")
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