7c38e6bb52
Add a variable to indicate the latest standard known to be supported for
each language:
* `CMAKE_C_STANDARD_LATEST`
* `CMAKE_CXX_STANDARD_LATEST`
* `CMAKE_CUDA_STANDARD_LATEST`
* `CMAKE_HIP_STANDARD_LATEST`
* `CMAKE_OBJC_STANDARD_LATEST`
* `CMAKE_OBJCXX_STANDARD_LATEST`
These variables, more generally referred to as
`CMAKE_<LANG>_STANDARD_LATEST`, are assigned an integer value which
represents the minimum between the latest version of the associated
language standard supported by the current compiler and the latest
version supported by CMake.
Add documentation for these variables in a new page called
`CMAKE_<LANG>_STANDARD_LATEST` was added under the "Variables for
Languages" section of the `cmake-variables(7)` page.
Update each compiler-specific CMake script under
`${CMAKE_ROOT}\Modules\Compiler` to manually define the relevant
`CMAKE_<LANG>_STANDARD_LATEST` variable as necessary. This will
require updating and maintaining as newer compiler versions become
recognized by CMake.
Closes: #25717
47 lines
1.6 KiB
CMake
47 lines
1.6 KiB
CMake
include(Compiler/Clang-OBJC)
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if((NOT DEFINED CMAKE_DEPENDS_USE_COMPILER OR CMAKE_DEPENDS_USE_COMPILER)
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AND CMAKE_GENERATOR MATCHES "Makefiles"
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AND CMAKE_DEPFILE_FLAGS_OBJC)
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# dependencies are computed by the compiler itself
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set(CMAKE_OBJC_DEPFILE_FORMAT gcc)
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set(CMAKE_OBJC_DEPENDS_USE_COMPILER TRUE)
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endif()
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if(NOT CMAKE_OBJC_COMPILER_VERSION VERSION_LESS 4.0)
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set(CMAKE_OBJC90_STANDARD_COMPILE_OPTION "-std=c90")
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set(CMAKE_OBJC90_EXTENSION_COMPILE_OPTION "-std=gnu90")
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set(CMAKE_OBJC90_STANDARD__HAS_FULL_SUPPORT ON)
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set(CMAKE_OBJC99_STANDARD_COMPILE_OPTION "-std=c99")
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set(CMAKE_OBJC99_EXTENSION_COMPILE_OPTION "-std=gnu99")
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set(CMAKE_OBJC99_STANDARD__HAS_FULL_SUPPORT ON)
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set(CMAKE_OBJC11_STANDARD_COMPILE_OPTION "-std=c11")
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set(CMAKE_OBJC11_EXTENSION_COMPILE_OPTION "-std=gnu11")
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set(CMAKE_OBJC11_STANDARD__HAS_FULL_SUPPORT ON)
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set(CMAKE_OBJC_STANDARD_LATEST 11)
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endif()
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# AppleClang 10.0 was the oldest compiler available to test C17 support
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if(NOT CMAKE_OBJC_COMPILER_VERSION VERSION_LESS 10.0)
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set(CMAKE_OBJC17_STANDARD_COMPILE_OPTION "-std=c17")
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set(CMAKE_OBJC17_EXTENSION_COMPILE_OPTION "-std=gnu17")
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set(CMAKE_OBJC17_STANDARD__HAS_FULL_SUPPORT ON)
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set(CMAKE_OBJC_STANDARD_LATEST 17)
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endif()
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if(NOT CMAKE_OBJC_COMPILER_VERSION VERSION_LESS 11.0.3)
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set(CMAKE_OBJC23_STANDARD_COMPILE_OPTION "-std=c2x")
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set(CMAKE_OBJC23_EXTENSION_COMPILE_OPTION "-std=gnu2x")
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set(CMAKE_OBJC23_STANDARD__HAS_FULL_SUPPORT ON)
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set(CMAKE_OBJC_STANDARD_LATEST 23)
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endif()
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# AppleClang 10.0 was the oldest compiler available to test default C11 support
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__compiler_check_default_language_standard(OBJC 4.0 99 10.0 11)
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