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include(Compiler/Clang)
__compiler_clang(C)
if("x${CMAKE_C_COMPILER_FRONTEND_VARIANT}" STREQUAL "xMSVC")
set(CMAKE_C_COMPILE_OPTIONS_EXPLICIT_LANGUAGE -TC)
set(CMAKE_C_CLANG_TIDY_DRIVER_MODE "cl")
set(CMAKE_C_INCLUDE_WHAT_YOU_USE_DRIVER_MODE "cl")
if((NOT DEFINED CMAKE_DEPENDS_USE_COMPILER OR CMAKE_DEPENDS_USE_COMPILER)
AND CMAKE_GENERATOR MATCHES "Makefiles|WMake"
AND CMAKE_DEPFILE_FLAGS_C)
set(CMAKE_C_DEPENDS_USE_COMPILER TRUE)
endif()
elseif("x${CMAKE_C_COMPILER_FRONTEND_VARIANT}" STREQUAL "xGNU")
set(CMAKE_C_COMPILE_OPTIONS_EXPLICIT_LANGUAGE -x c)
if((NOT DEFINED CMAKE_DEPENDS_USE_COMPILER OR CMAKE_DEPENDS_USE_COMPILER)
AND CMAKE_GENERATOR MATCHES "Makefiles|WMake"
AND CMAKE_DEPFILE_FLAGS_C)
# dependencies are computed by the compiler itself
set(CMAKE_C_DEPFILE_FORMAT gcc)
set(CMAKE_C_DEPENDS_USE_COMPILER TRUE)
endif()
endif()
if("x${CMAKE_C_COMPILER_FRONTEND_VARIANT}" STREQUAL "xGNU")
if(CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 2.1)
set(CMAKE_C90_STANDARD_COMPILE_OPTION "-std=c90")
set(CMAKE_C90_EXTENSION_COMPILE_OPTION "-std=gnu90")
set(CMAKE_C99_STANDARD_COMPILE_OPTION "-std=c99")
set(CMAKE_C99_EXTENSION_COMPILE_OPTION "-std=gnu99")
set(CMAKE_C_STANDARD_LATEST 99)
endif()
if(CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 3.1)
set(CMAKE_C11_STANDARD_COMPILE_OPTION "-std=c11")
set(CMAKE_C11_EXTENSION_COMPILE_OPTION "-std=gnu11")
set(CMAKE_C_STANDARD_LATEST 11)
elseif(CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 3.0)
set(CMAKE_C11_STANDARD_COMPILE_OPTION "-std=c1x")
set(CMAKE_C11_EXTENSION_COMPILE_OPTION "-std=gnu1x")
set(CMAKE_C_STANDARD_LATEST 11)
endif()
if(CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 6.0)
set(CMAKE_C17_STANDARD_COMPILE_OPTION "-std=c17")
set(CMAKE_C17_EXTENSION_COMPILE_OPTION "-std=gnu17")
set(CMAKE_C_STANDARD_LATEST 17)
endif()
if(CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 18.0)
set(CMAKE_C23_STANDARD_COMPILE_OPTION "-std=c23")
set(CMAKE_C23_EXTENSION_COMPILE_OPTION "-std=gnu23")
set(CMAKE_C_STANDARD_LATEST 23)
elseif(CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 9.0)
set(CMAKE_C23_STANDARD_COMPILE_OPTION "-std=c2x")
set(CMAKE_C23_EXTENSION_COMPILE_OPTION "-std=gnu2x")
set(CMAKE_C_STANDARD_LATEST 23)
endif()
else()
set(CMAKE_C90_STANDARD_COMPILE_OPTION "")
set(CMAKE_C90_EXTENSION_COMPILE_OPTION "")
set(CMAKE_C99_STANDARD_COMPILE_OPTION "")
set(CMAKE_C99_EXTENSION_COMPILE_OPTION "")
if(CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 13.0)
set(CMAKE_C11_STANDARD_COMPILE_OPTION "/std:c11")
set(CMAKE_C11_EXTENSION_COMPILE_OPTION "/std:c11")
set(CMAKE_C17_STANDARD_COMPILE_OPTION "/std:c17")
set(CMAKE_C17_EXTENSION_COMPILE_OPTION "/std:c17")
else()
set(CMAKE_C11_STANDARD_COMPILE_OPTION "")
set(CMAKE_C11_EXTENSION_COMPILE_OPTION "")
set(CMAKE_C17_STANDARD_COMPILE_OPTION "")
set(CMAKE_C17_EXTENSION_COMPILE_OPTION "")
endif()
set(CMAKE_C_STANDARD_LATEST 17)
if(CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 18.0)
# This version of clang-cl does not have a -std:c23 flag.
# Pass the standard through to the underlying clang directly.
# Note that cmVisualStudio10TargetGenerator::ComputeClOptions
# has a special case to map this back to -std:clatest in .vcxproj
# files that also have CXX sources.
set(CMAKE_C23_STANDARD_COMPILE_OPTION "-clang:-std=c23")
set(CMAKE_C23_EXTENSION_COMPILE_OPTION "-clang:-std=c23")
set(CMAKE_C_STANDARD_LATEST 23)
endif()
endif()
if(CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 2.1)
set(CMAKE_C90_STANDARD__HAS_FULL_SUPPORT ON)
set(CMAKE_C99_STANDARD__HAS_FULL_SUPPORT ON)
endif()
if(CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 3.0)
set(CMAKE_C11_STANDARD__HAS_FULL_SUPPORT ON)
endif()
__compiler_check_default_language_standard(C 2.1 99 3.5.2 11 11.0 17)
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