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include(Compiler/GNU)
__compiler_gnu(C)
if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.7)
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()
# This may change in a future GNU version.
set(CMAKE_C_STANDARD_DEFAULT 90)
macro(cmake_record_c_compile_features)
macro(_get_gcc_features std_version list)
record_compiler_features(C "${std_version}" ${list})
endmacro()
if (UNIX AND NOT APPLE AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.7)
_get_gcc_features(${CMAKE_C11_STANDARD_COMPILE_OPTION} CMAKE_C11_COMPILE_FEATURES)
if (_result EQUAL 0)
_get_gcc_features(${CMAKE_C99_STANDARD_COMPILE_OPTION} CMAKE_C99_COMPILE_FEATURES)
endif()
if (_result EQUAL 0)
_get_gcc_features(${CMAKE_C90_STANDARD_COMPILE_OPTION} CMAKE_C90_COMPILE_FEATURES)
endif()
else()
set(_result 0)
endif()
endmacro()
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