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- include(Compiler/Clang)
- __compiler_clang(C)
- cmake_policy(GET CMP0025 appleClangPolicy)
- if(APPLE AND NOT appleClangPolicy STREQUAL NEW)
- return()
- endif()
- if(NOT CMAKE_C_COMPILER_VERSION VERSION_LESS 3.4)
- if(NOT "x${CMAKE_C_SIMULATE_ID}" STREQUAL "xMSVC")
- set(CMAKE_C90_STANDARD_COMPILE_OPTION "-std=c90")
- set(CMAKE_C90_EXTENSION_COMPILE_OPTION "-std=gnu90")
- set(CMAKE_C90_STANDARD__HAS_FULL_SUPPORT ON)
- set(CMAKE_C99_STANDARD_COMPILE_OPTION "-std=c99")
- set(CMAKE_C99_EXTENSION_COMPILE_OPTION "-std=gnu99")
- set(CMAKE_C99_STANDARD__HAS_FULL_SUPPORT ON)
- set(CMAKE_C11_STANDARD_COMPILE_OPTION "-std=c11")
- set(CMAKE_C11_EXTENSION_COMPILE_OPTION "-std=gnu11")
- set(CMAKE_C11_STANDARD__HAS_FULL_SUPPORT ON)
- else()
- # clang-cl doesn't have any of these
- set(CMAKE_C90_STANDARD_COMPILE_OPTION "")
- set(CMAKE_C90_EXTENSION_COMPILE_OPTION "")
- set(CMAKE_C90_STANDARD__HAS_FULL_SUPPORT ON)
- set(CMAKE_C99_STANDARD_COMPILE_OPTION "")
- set(CMAKE_C99_EXTENSION_COMPILE_OPTION "")
- set(CMAKE_C99_STANDARD__HAS_FULL_SUPPORT ON)
- set(CMAKE_C11_STANDARD_COMPILE_OPTION "")
- set(CMAKE_C11_EXTENSION_COMPILE_OPTION "")
- set(CMAKE_C11_STANDARD__HAS_FULL_SUPPORT ON)
- endif()
- endif()
- if(NOT "x${CMAKE_C_SIMULATE_ID}" STREQUAL "xMSVC")
- __compiler_check_default_language_standard(C 3.4 99 3.6 11)
- else()
- set(CMAKE_C_STANDARD_DEFAULT "")
- endif()
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