a3d0ae1758
Clang 3.4 uses C99 by default, and Clang 3.6 uses C11 by default: http://thread.gmane.org/gmane.comp.compilers.clang.devel/39379 GNU 4.9 uses C90 by default, and GNU 5.0 uses C11 by default: https://gcc.gnu.org/gcc-5/changes.html Test that the default compiler settings result in the expected dialect macros being defined for both C and CXX. Remove the unused main.c file from the CompileFeatures unit test.
38 lines
1.1 KiB
CMake
38 lines
1.1 KiB
CMake
include(Compiler/GNU)
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__compiler_gnu(C)
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if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.7)
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set(CMAKE_C90_STANDARD_COMPILE_OPTION "-std=c90")
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set(CMAKE_C90_EXTENSION_COMPILE_OPTION "-std=gnu90")
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set(CMAKE_C99_STANDARD_COMPILE_OPTION "-std=c99")
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set(CMAKE_C99_EXTENSION_COMPILE_OPTION "-std=gnu99")
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set(CMAKE_C11_STANDARD_COMPILE_OPTION "-std=c11")
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set(CMAKE_C11_EXTENSION_COMPILE_OPTION "-std=gnu11")
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endif()
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if (NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 5.0)
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set(CMAKE_C_STANDARD_DEFAULT 11)
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else(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.7)
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set(CMAKE_C_STANDARD_DEFAULT 90)
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endif()
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macro(cmake_record_c_compile_features)
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macro(_get_gcc_features std_version list)
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record_compiler_features(C "-std=${std_version}" ${list})
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endmacro()
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if (UNIX AND NOT APPLE AND NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 4.7)
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_get_gcc_features(c90 CMAKE_C90_COMPILE_FEATURES)
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if (_result EQUAL 0)
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_get_gcc_features(c99 CMAKE_C99_COMPILE_FEATURES)
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endif()
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if (_result EQUAL 0)
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_get_gcc_features(c11 CMAKE_C11_COMPILE_FEATURES)
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endif()
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else()
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set(_result 0)
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endif()
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endmacro()
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