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https://github.com/reactos/CMake.git
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8e4899fd6c
Use the infrastructure added by commit f92ccbc306c20554af (CompileFeatures: memoize C compilers with full language level support) to avoid using a `try_compile` to check for C 90/99/11 feature support when the running compiler is known to have a fixed set of feature support.
43 lines
1.4 KiB
CMake
43 lines
1.4 KiB
CMake
include(Compiler/Clang)
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__compiler_clang(C)
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cmake_policy(GET CMP0025 appleClangPolicy)
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if(APPLE AND NOT appleClangPolicy STREQUAL NEW)
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return()
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endif()
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if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 3.4)
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if(NOT "x${CMAKE_C_SIMULATE_ID}" STREQUAL "xMSVC")
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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_C90_STANDARD__HAS_FULL_SUPPORT ON)
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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_C99_STANDARD__HAS_FULL_SUPPORT ON)
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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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set(CMAKE_C11_STANDARD__HAS_FULL_SUPPORT ON)
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else()
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# clang-cl doesn't have any of these
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set(CMAKE_C90_STANDARD_COMPILE_OPTION "")
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set(CMAKE_C90_EXTENSION_COMPILE_OPTION "")
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set(CMAKE_C90_STANDARD__HAS_FULL_SUPPORT ON)
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set(CMAKE_C99_STANDARD_COMPILE_OPTION "")
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set(CMAKE_C99_EXTENSION_COMPILE_OPTION "")
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set(CMAKE_C99_STANDARD__HAS_FULL_SUPPORT ON)
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set(CMAKE_C11_STANDARD_COMPILE_OPTION "")
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set(CMAKE_C11_EXTENSION_COMPILE_OPTION "")
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set(CMAKE_C11_STANDARD__HAS_FULL_SUPPORT ON)
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endif()
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endif()
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if(NOT "x${CMAKE_C_SIMULATE_ID}" STREQUAL "xMSVC")
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__compiler_check_default_language_standard(C 3.4 99 3.6 11)
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else()
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set(CMAKE_C_STANDARD_DEFAULT "")
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endif()
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