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include(Compiler/GNU)
__compiler_gnu(CXX)
if((NOT DEFINED CMAKE_DEPENDS_USE_COMPILER OR CMAKE_DEPENDS_USE_COMPILER)
AND CMAKE_GENERATOR MATCHES "Makefiles|WMake"
AND CMAKE_DEPFILE_FLAGS_CXX)
# dependencies are computed by the compiler itself
set(CMAKE_CXX_DEPFILE_FORMAT gcc)
set(CMAKE_CXX_DEPENDS_USE_COMPILER TRUE)
endif()
set(CMAKE_CXX_COMPILE_OPTIONS_EXPLICIT_LANGUAGE -x c++)
if (WIN32)
if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.6)
set(CMAKE_CXX_COMPILE_OPTIONS_VISIBILITY_INLINES_HIDDEN "-fno-keep-inline-dllexport")
endif()
else()
if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.0)
set(CMAKE_CXX_COMPILE_OPTIONS_VISIBILITY_INLINES_HIDDEN "-fvisibility-inlines-hidden")
endif()
endif()
if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 3.4)
set(CMAKE_CXX98_STANDARD_COMPILE_OPTION "-std=c++98")
set(CMAKE_CXX98_EXTENSION_COMPILE_OPTION "-std=gnu++98")
endif()
if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.7)
set(CMAKE_CXX98_STANDARD__HAS_FULL_SUPPORT ON)
set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "-std=c++11")
set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "-std=gnu++11")
elseif (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.4)
# 4.3 supports 0x variants
set(CMAKE_CXX11_STANDARD_COMPILE_OPTION "-std=c++0x")
set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "-std=gnu++0x")
endif()
if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.8.1)
set(CMAKE_CXX11_STANDARD__HAS_FULL_SUPPORT ON)
endif()
if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.9)
set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "-std=c++14")
set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "-std=gnu++14")
elseif (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.8)
set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "-std=c++1y")
set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "-std=gnu++1y")
endif()
if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0)
set(CMAKE_CXX14_STANDARD__HAS_FULL_SUPPORT ON)
endif()
if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 8.0)
set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "-std=c++17")
set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "-std=gnu++17")
elseif (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.1)
set(CMAKE_CXX17_STANDARD_COMPILE_OPTION "-std=c++1z")
set(CMAKE_CXX17_EXTENSION_COMPILE_OPTION "-std=gnu++1z")
endif()
if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 11.1)
set(CMAKE_CXX20_STANDARD_COMPILE_OPTION "-std=c++20")
set(CMAKE_CXX20_EXTENSION_COMPILE_OPTION "-std=gnu++20")
set(CMAKE_CXX23_STANDARD_COMPILE_OPTION "-std=c++23")
set(CMAKE_CXX23_EXTENSION_COMPILE_OPTION "-std=gnu++23")
elseif(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 8.0)
set(CMAKE_CXX20_STANDARD_COMPILE_OPTION "-std=c++2a")
set(CMAKE_CXX20_EXTENSION_COMPILE_OPTION "-std=gnu++2a")
endif()
__compiler_check_default_language_standard(CXX 3.4 98 6.0 14 11.1 17)
if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 14.0)
string(CONCAT CMAKE_EXPERIMENTAL_CXX_SCANDEP_SOURCE
"<CMAKE_CXX_COMPILER> <DEFINES> <INCLUDES> <FLAGS> -E -x c++ <SOURCE>"
" -MT <DYNDEP_FILE> -MD -MF <DEP_FILE>"
" -fmodules-ts -fdeps-file=<DYNDEP_FILE> -fdeps-target=<OBJECT> -fdeps-format=p1689r5"
" -o <PREPROCESSED_SOURCE>")
set(CMAKE_EXPERIMENTAL_CXX_MODULE_MAP_FORMAT "gcc")
string(CONCAT CMAKE_EXPERIMENTAL_CXX_MODULE_MAP_FLAG
# Turn on modules.
"-fmodules-ts"
# Read the module mapper file.
" -fmodule-mapper=<MODULE_MAP_FILE>"
# Make sure dependency tracking is enabled (missing from `try_*`).
" -MD"
# Suppress `CXX_MODULES +=` from generated depfile snippets.
" -fdeps-format=p1689r5"
# Force C++ as a language.
" -x c++")
set(CMAKE_EXPERIMENTAL_CXX_MODULE_BMI_ONLY_FLAG "-fmodule-only")
endif()
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