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include(Compiler/Clang)
__compiler_clang(C)
cmake_policy(GET CMP0025 appleClangPolicy)
if(WIN32 OR (APPLE AND NOT appleClangPolicy STREQUAL NEW))
return()
endif()
if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 3.4)
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_C11_STANDARD_COMPILE_OPTION "-std=c11")
set(CMAKE_C11_EXTENSION_COMPILE_OPTION "-std=gnu11")
endif()
if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 3.4)
if (NOT CMAKE_C_COMPILER_FORCED)
if (NOT CMAKE_C_STANDARD_COMPUTED_DEFAULT)
message(FATAL_ERROR "CMAKE_C_STANDARD_COMPUTED_DEFAULT should be set for ${CMAKE_C_COMPILER_ID} (${CMAKE_C_COMPILER}) version ${CMAKE_C_COMPILER_VERSION}")
endif()
set(CMAKE_C_STANDARD_DEFAULT ${CMAKE_C_STANDARD_COMPUTED_DEFAULT})
elseif(NOT DEFINED CMAKE_C_STANDARD_DEFAULT)
# Compiler id was forced so just guess the default standard level.
if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 3.6)
set(CMAKE_C_STANDARD_DEFAULT 11)
else()
set(CMAKE_C_STANDARD_DEFAULT 99)
endif()
endif()
endif()
macro(cmake_record_c_compile_features)
macro(_get_clang_features std_version list)
record_compiler_features(C "${std_version}" ${list})
endmacro()
set(_result 0)
if (UNIX AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 3.4)
_get_clang_features(${CMAKE_C11_STANDARD_COMPILE_OPTION} CMAKE_C11_COMPILE_FEATURES)
if (_result EQUAL 0)
_get_clang_features(${CMAKE_C99_STANDARD_COMPILE_OPTION} CMAKE_C99_COMPILE_FEATURES)
endif()
if (_result EQUAL 0)
_get_clang_features(${CMAKE_C90_STANDARD_COMPILE_OPTION} CMAKE_C90_COMPILE_FEATURES)
endif()
endif()
endmacro()
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