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CMakeLists.txt: support AVX2 detection #78

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Merged
merged 3 commits into from
Oct 1, 2025
Merged

CMakeLists.txt: support AVX2 detection #78

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9646054
CMakeLists.txt: support AVX2 detection for https://github.com/xmake-i…
luadebug Sep 30, 2025
ac046aa
Update CMakeLists.txt
luadebug Sep 30, 2025
86fea06
CMakeLists.txt: do not use /ARCH:AVX since we have /ARCH:AVX2 already
luadebug Sep 30, 2025
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25 changes: 21 additions & 4 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -3,20 +3,31 @@ cmake_minimum_required(VERSION 3.26)
project(omath VERSION 3.8.1 LANGUAGES CXX)

include(CMakePackageConfigHelpers)
include(CheckCXXCompilerFlag)

if (MSVC)
check_cxx_compiler_flag("/arch:AVX2" COMPILER_SUPPORTS_AVX2)
else ()
check_cxx_compiler_flag("-mavx2" COMPILER_SUPPORTS_AVX2)
endif ()

option(OMATH_BUILD_TESTS "Build unit tests" ${PROJECT_IS_TOP_LEVEL})
option(OMATH_BUILD_BENCHMARK "Build benchmarks" ${PROJECT_IS_TOP_LEVEL})
option(OMATH_THREAT_WARNING_AS_ERROR "Set highest level of warnings and force compiler to treat them as errors" ON)
option(OMATH_BUILD_AS_SHARED_LIBRARY "Build Omath as .so or .dll" OFF)
option(OMATH_USE_AVX2 "Omath will use AVX2 to boost performance" ON)
option(OMATH_USE_AVX2 "Omath will use AVX2 to boost performance" ${COMPILER_SUPPORTS_AVX2})
option(OMATH_IMGUI_INTEGRATION "Omath will define method to convert omath types to imgui types" OFF)
option(OMATH_BUILD_EXAMPLES "Build example projects with you can learn & play" OFF)
option(OMATH_STATIC_MSVC_RUNTIME_LIBRARY "Force Omath to link static runtime" OFF)
option(OMATH_SUPRESS_SAFETY_CHECKS "Supress some safety checks in release build to improve general performance" ON)
option(OMATH_USE_UNITY_BUILD "Will enable unity build to speed up compilation" OFF)
option(OMATH_ENABLE_LEGACY "Will enable legacy classes that MUST be used ONLY for backward compatibility" OFF)

if (OMATH_USE_AVX2 AND NOT COMPILER_SUPPORTS_AVX2)
message(WARNING "OMATH_USE_AVX2 requested, but compiler/target does not support AVX2. Disabling.")
set(OMATH_USE_AVX2 OFF CACHE BOOL "Omath will use AVX2 to boost performance" FORCE)
endif ()

message(STATUS "[${PROJECT_NAME}]: Building on ${CMAKE_HOST_SYSTEM_NAME}, compiler ${CMAKE_CXX_COMPILER_ID}")
message(STATUS "[${PROJECT_NAME}]: Warnings as errors ${OMATH_THREAT_WARNING_AS_ERROR}")
message(STATUS "[${PROJECT_NAME}]: Build unit tests ${OMATH_BUILD_TESTS}")
Expand Down Expand Up @@ -93,9 +104,15 @@ if (OMATH_STATIC_MSVC_RUNTIME_LIBRARY)
)
endif ()

if (OMATH_USE_AVX2 AND CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
target_compile_options(${PROJECT_NAME} PUBLIC -mavx2 -mavx -mfma)
endif ()
if (OMATH_USE_AVX2)
if (MSVC)
target_compile_options(${PROJECT_NAME} PUBLIC /ARCH:AVX2)
elseif (EMSCRIPTEN)
target_compile_options(${PROJECT_NAME} PUBLIC -msimd128 -mavx2)
elseif (CMAKE_CXX_COMPILER_ID MATCHES "GNU|Clang|AppleClang")
target_compile_options(${PROJECT_NAME} PUBLIC -mfma -mavx2)
endif()
endif()

target_compile_features(${PROJECT_NAME} PUBLIC cxx_std_23)

Expand Down