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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.
include(Compiler/MSVC)
__compiler_msvc(C)
include(Compiler/CMakeCommonCompilerMacros)
if(CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 19.27)
set(CMAKE_C90_STANDARD_COMPILE_OPTION "")
set(CMAKE_C90_EXTENSION_COMPILE_OPTION "")
set(CMAKE_C99_STANDARD_COMPILE_OPTION "")
set(CMAKE_C99_EXTENSION_COMPILE_OPTION "")
set(CMAKE_C11_STANDARD_COMPILE_OPTION "-std:c11")
set(CMAKE_C11_EXTENSION_COMPILE_OPTION "-std:c11")
if(CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 19.28)
set(CMAKE_C90_STANDARD__HAS_FULL_SUPPORT ON)
set(CMAKE_C99_STANDARD__HAS_FULL_SUPPORT ON)
set(CMAKE_C11_STANDARD__HAS_FULL_SUPPORT ON)
set(CMAKE_C17_STANDARD_COMPILE_OPTION "-std:c17")
set(CMAKE_C17_EXTENSION_COMPILE_OPTION "-std:c17")
else()
# Special case for 19.27 (VS 16.7): C11 has partial support.
macro(cmake_record_c_compile_features)
_has_compiler_features_c(90)
_has_compiler_features_c(99)
list(APPEND CMAKE_C11_COMPILE_FEATURES c_std_11)
set(_result 0) # expected by cmake_determine_compile_features
endmacro()
endif()
__compiler_check_default_language_standard(C 19.27 99)
else()
# MSVC has no specific options to set C language standards, but set them as
# empty strings anyways so the feature test infrastructure can at least check
# to see if they are defined.
set(CMAKE_C90_STANDARD_COMPILE_OPTION "")
set(CMAKE_C90_EXTENSION_COMPILE_OPTION "")
set(CMAKE_C99_STANDARD_COMPILE_OPTION "")
set(CMAKE_C99_EXTENSION_COMPILE_OPTION "")
set(CMAKE_C11_STANDARD_COMPILE_OPTION "")
set(CMAKE_C11_EXTENSION_COMPILE_OPTION "")
# There is no meaningful default for this
set(CMAKE_C_STANDARD_DEFAULT "")
# There are no C compiler modes so we hard-code the known compiler supported
# features. Override the default macro for this special case. Pretend that
# all language standards are available so that at least compilation
# can be attempted.
macro(cmake_record_c_compile_features)
list(APPEND CMAKE_C_COMPILE_FEATURES
c_std_90
c_std_99
c_std_11
c_std_17
c_std_23
c_function_prototypes
)
list(APPEND CMAKE_C90_COMPILE_FEATURES c_std_90 c_function_prototypes)
list(APPEND CMAKE_C99_COMPILE_FEATURES c_std_99)
list(APPEND CMAKE_C11_COMPILE_FEATURES c_std_11)
if (CMAKE_C_COMPILER_VERSION VERSION_GREATER_EQUAL 14.0)
list(APPEND CMAKE_C_COMPILE_FEATURES c_variadic_macros)
list(APPEND CMAKE_C99_COMPILE_FEATURES c_variadic_macros)
endif()
set(_result 0) # expected by cmake_determine_compile_features
endmacro()
endif()
set(CMAKE_C_COMPILE_OPTIONS_EXPLICIT_LANGUAGE -TC)
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