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Enable OpenMP when it is found in CMakeLists.txt and add two variables called IS_GNU and IS_CLANG

This commit is contained in:
Username404 2021-09-12 12:31:02 +02:00
parent 2b84262ea0
commit e6e12a26ec
Signed by: Username404-59
GPG Key ID: 7AB361FBB257A5D1
1 changed files with 12 additions and 4 deletions
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16
CMakeLists.txt
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@ -31,6 +31,8 @@ endif()
set(CMAKE_CXX_FLAGS "-Wall")
set(MINIMAL_GNU "11.0")
set(MINIMAL_CLANG "13.0")
set(IS_GNU (${CMAKE_CXX_COMPILER_ID} STREQUAL GNU))
set(IS_CLANG (${CMAKE_CXX_COMPILER_ID} STREQUAL Clang))
if (NOT MSVC)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread")
@ -45,8 +47,14 @@ if(CCACHE_PRESENT)
set_property(GLOBAL PROPERTY RULE_LAUNCH_LINK ccache)
endif(CCACHE_PRESENT)
if ((${CMAKE_CXX_COMPILER_ID} STREQUAL GNU) OR (${CMAKE_CXX_COMPILER_ID} STREQUAL Clang))
set(CMAKE_CXX_FLAGS "-flto ${CMAKE_CXX_FLAGS} -pipe -fstack-protector-strong -fstack-clash-protection -funwind-tables -fasynchronous-unwind-tables -fexceptions")
if (${IS_GNU} OR ${IS_CLANG})
if (NOT (MINGW AND ${IS_CLANG})) # llvm-mingw linux packages don't bundle openmp
include(FindOpenMP)
if (OpenMP_CXX_FOUND)
add_definitions(-D_GLIBCXX_PARALLEL)
endif()
endif()
set(CMAKE_CXX_FLAGS "-flto ${OpenMP_CXX_FLAGS} ${CMAKE_CXX_FLAGS} -pipe -fstack-protector-strong -fstack-clash-protection -funwind-tables -fasynchronous-unwind-tables -fexceptions")
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -ffunction-sections -fdata-sections -fmerge-all-constants -ftree-vectorize")
include(CheckCXXCompilerFlag)
set(CF_PROTECTION "-fcf-protection")
@ -56,13 +64,13 @@ if ((${CMAKE_CXX_COMPILER_ID} STREQUAL GNU) OR (${CMAKE_CXX_COMPILER_ID} STREQUA
endif()
endif()
if (${CMAKE_CXX_COMPILER_ID} STREQUAL GNU)
if (${IS_GNU})
if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS ${MINIMAL_GNU})
message(FATAL_ERROR "G++ ${MINIMAL_GNU} or higher is required.")
endif()
set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -foptimize-strlen -fsched-pressure -flive-range-shrinkage -fpredictive-commoning -ftree-partial-pre -fira-loop-pressure -ftree-loop-distribution -floop-interchange -fsplit-paths -fgcse-las -fgcse-sm -fipa-pta -fstdarg-opt -fivopts -s")
set(CMAKE_CXX_FLAGS "-fno-use-linker-plugin -fwhole-program ${CMAKE_CXX_FLAGS}")
elseif(${CMAKE_CXX_COMPILER_ID} STREQUAL Clang)
elseif(${IS_CLANG})
if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS ${MINIMAL_CLANG})
message(FATAL_ERROR "Clang ${MINIMAL_CLANG} or higher is required.")
endif()