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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
`${CMAKE_ROOT}\Modules\Compiler` to manually define the relevant
`CMAKE_<LANG>_STANDARD_LATEST` variable as necessary. This will
require updating and maintaining as newer compiler versions become
recognized by CMake.
Closes: #25717
33 lines
870 B
CMake
33 lines
870 B
CMake
include(RunCMake)
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# Detect information from the toolchain:
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# - CMAKE_C_STANDARD_DEFAULT
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# - CMAKE_CXX_STANDARD_DEFAULT
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run_cmake(Inspect)
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include("${RunCMake_BINARY_DIR}/Inspect-build/info.cmake")
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function(run_StdLatest lang)
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set(RunCMake_TEST_BINARY_DIR ${RunCMake_BINARY_DIR}/StdLatest-${lang}-build)
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run_cmake(StdLatest-${lang})
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set(RunCMake_TEST_NO_CLEAN 1)
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set(RunCMake_TEST_OUTPUT_MERGE 1)
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run_cmake_command(StdLatest-${lang}-build ${CMAKE_COMMAND} --build . --config Debug)
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endfunction()
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if(NOT CMake_NO_C_STANDARD AND DEFINED CMAKE_C_STANDARD_DEFAULT)
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run_StdLatest(C)
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endif()
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if(NOT CMake_NO_CXX_STANDARD AND DEFINED CMAKE_CXX_STANDARD_DEFAULT)
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run_StdLatest(CXX)
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endif()
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if(CMake_TEST_CUDA)
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run_StdLatest(CUDA)
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endif()
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if(CMake_TEST_HIP)
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run_StdLatest(HIP)
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endif()
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if(CMake_TEST_OBJC)
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run_StdLatest(OBJC)
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run_StdLatest(OBJCXX)
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endif()
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