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mdbx-cmake: sync cmake-compiler module with erthink upstream.
Change-Id: I4eeeb2bc2800bfb44c915533843c59438733ff4b
This commit is contained in:
Leonid Yuriev
parent
ed6863851e
commit
d752de0ee0
@ -17,9 +17,9 @@ cmake_minimum_required(VERSION 3.8.2)
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cmake_policy(PUSH)
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cmake_policy(VERSION 3.8.2)
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if (CMAKE_VERSION MATCHES ".*MSVC.*")
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if(CMAKE_VERSION MATCHES ".*MSVC.*" AND CMAKE_VERSION VERSION_LESS 3.16)
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message(FATAL_ERROR "CMake from MSVC kit is unfit! "
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"Please use the original CMake from https://cmake.org/download/")
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"Please use MSVC2019 with modern CMake the original CMake from https://cmake.org/download/")
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endif()
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if(NOT (CMAKE_C_COMPILER_LOADED OR CMAKE_CXX_COMPILER_LOADED))
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@ -214,6 +214,15 @@ else()
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check_compiler_flag("-Ominimal" CC_HAS_OMINIMAL)
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check_compiler_flag("-ffunction-sections -fdata-sections" CC_HAS_SECTIONS)
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check_compiler_flag("-ffast-math" CC_HAS_FASTMATH)
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check_compiler_flag("-Wno-attributes" CC_HAS_WNO_ATTRIBUTES)
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# Check for an omp support
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set(CMAKE_REQUIRED_FLAGS "-fopenmp -Werror")
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check_cxx_source_compiles("int main(void) {
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#pragma omp parallel
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return 0;
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}" HAVE_OPENMP)
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set(CMAKE_REQUIRED_FLAGS "")
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endif()
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# Check for LTO support by GCC
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@ -276,7 +285,7 @@ if(CMAKE_COMPILER_IS_GNU${CMAKE_PRIMARY_LANG})
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endif()
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# check for LTO by MSVC
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if(MSVC)
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if(MSVC AND NOT CMAKE_COMPILER_IS_CLANG)
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if(NOT MSVC_VERSION LESS 1600)
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set(MSVC_LTO_AVAILABLE TRUE)
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message(STATUS "Link-Time Optimization by MSVC is available")
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@ -290,25 +299,37 @@ endif()
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if(CMAKE_COMPILER_IS_CLANG)
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if(NOT CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER_VERSION VERSION_LESS 3.5)
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execute_process(COMMAND ${CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER} -print-search-dirs
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OUTPUT_VARIABLE clang_search_dirs)
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OUTPUT_VARIABLE clang_search_dirs RESULT_VARIABLE clang_probe_result ERROR_QUIET)
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unset(clang_bindir)
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unset(clang_libdir)
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if(clang_probe_result EQUAL 0)
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string(REGEX MATCH "^(.*programs: =)([^:]*:)*([^:]+/llvm[-.0-9]+/bin[^:]*)(:[^:]*)*(\n.+)$" clang_bindir_valid ${clang_search_dirs})
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if(clang_bindir_valid)
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string(REGEX REPLACE "^(.*programs: =)([^:]*:)*([^:]+/llvm[-.0-9]+/bin[^:]*)(:[^:]*)*(\n.+)$" "\\3" clang_bindir ${clang_search_dirs})
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if(CMAKE_SYSTEM_NAME STREQUAL "WINDOWS")
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set(clang_libdir ${clang_bindir})
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else()
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get_filename_component(clang_libdir "${clang_bindir}/../lib" REALPATH)
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endif()
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endif()
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else()
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get_filename_component(clang_bindir ${CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER} DIRECTORY)
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if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
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set(clang_libdir ${clang_bindir})
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else()
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get_filename_component(clang_libdir "${clang_bindir}/../lib" REALPATH)
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if(clang_libdir)
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message(STATUS "Found CLANG/LLVM directories: ${clang_bindir}, ${clang_libdir}")
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endif()
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endif()
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if(NOT (clang_bindir AND clang_libdir))
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if(clang_bindir AND clang_libdir)
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message(STATUS "Found CLANG/LLVM directories: ${clang_bindir}, ${clang_libdir}")
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else()
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message(STATUS "Could NOT find CLANG/LLVM directories (bin and/or lib).")
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endif()
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if(NOT CMAKE_CLANG_LD AND clang_bindir)
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find_program(CMAKE_CLANG_LD NAMES llvm-link link llvm-ld ld PATHS ${clang_bindir} NO_DEFAULT_PATH)
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find_program(CMAKE_CLANG_LD NAMES lld-link ld.lld ld64.lld lld-link llvm-link link llvm-ld ld PATHS ${clang_bindir} NO_DEFAULT_PATH)
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endif()
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if(NOT CMAKE_CLANG_AR AND clang_bindir)
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find_program(CMAKE_CLANG_AR NAMES llvm-ar ar PATHS ${clang_bindir} NO_DEFAULT_PATH)
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@ -346,7 +367,7 @@ if(CMAKE_COMPILER_IS_CLANG)
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unset(clang_search_dirs)
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endif()
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if((CLANG_LTO_PLUGIN AND CMAKE_LD_GOLD) AND
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if((CLANG_LTO_PLUGIN AND CMAKE_LD_GOLD) OR
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(CMAKE_CLANG_LD AND CMAKE_CLANG_AR AND CMAKE_CLANG_NM AND CMAKE_CLANG_RANLIB))
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set(CLANG_LTO_AVAILABLE TRUE)
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message(STATUS "Link-Time Optimization by CLANG/LLVM is available")
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@ -437,6 +458,12 @@ macro(setup_compile_flags)
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add_compile_flags("CXX" "-fcxx-exceptions -frtti")
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endif()
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if(CC_HAS_WNO_ATTRIBUTES AND CMAKE_COMPILER_IS_GNU${CMAKE_PRIMARY_LANG}
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AND CMAKE_${CMAKE_PRIMARY_LANG}_COMPILER_VERSION VERSION_LESS 9)
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# GCC < 9.x generates false-positive warnings for optimization attributes
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add_compile_flags("C;CXX" "-Wno-attributes")
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endif()
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# In C a global variable without a storage specifier (static/extern) and
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# without an initialiser is called a ’tentative definition’. The
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# language permits multiple tentative definitions in the single
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@ -564,7 +591,7 @@ macro(setup_compile_flags)
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endif()
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endif()
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if(MSVC AND LTO_ENABLED)
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if(MSVC AND NOT CMAKE_COMPILER_IS_CLANG AND LTO_ENABLED)
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add_compile_flags("C;CXX" "/GL")
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foreach(linkmode IN ITEMS EXE SHARED STATIC MODULE)
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set(${linkmode}_LINKER_FLAGS "${${linkmode}_LINKER_FLAGS} /LTCG")
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@ -617,10 +644,12 @@ macro(setup_compile_flags)
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set(CLANG_LTO_FLAG "-flto=thin")
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endif()
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add_compile_flags("C;CXX" ${CLANG_LTO_FLAG})
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if(NOT MSVC)
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set(EXE_LINKER_FLAGS "${EXE_LINKER_FLAGS} ${CLANG_LTO_FLAG} -fverbose-asm -fwhole-program")
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set(SHARED_LINKER_FLAGS "${SHARED_LINKER_FLAGS} ${CLANG_LTO_FLAG} -fverbose-asm")
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set(MODULE_LINKER_FLAGS "${MODULE_LINKER_FLAGS} ${CLANG_LTO_FLAG} -fverbose-asm")
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endif()
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endif()
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# LY: push C/CXX flags into the cache
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set(CMAKE_CXX_FLAGS ${CXX_FLAGS} CACHE STRING "Flags used by the C++ compiler during all build types" FORCE)
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