917d5021d7
Fixes: #36558 #32577 This commit introduces CMAKE_C_COMPILE_FEATURES and CMAKE_CXX_COMPILE_FEATURES. This allows users to use the `target_compile_features()` in their own code. In Zephyr, the CMAKE_C/CXX_COMPILE_FEATURES are defined based on the compiler and the Kconfig / CSTD setting. Doing so ensures that a user compiling Zephyr with c99 and specifies `target_compile_features(<target> ... c_std_11)` will get an error. And similar if building Zephyr with C++ support and c++11, but testing for `target_compile_features(<target> ... cxx_std_17)`. For example in the C++ case, the user must ensure that Zephyr is compiled with C++17, that is: CPLUSPLUS=y and STD_CPP17=y, in which case the CMAKE_CXX_COMPILE_FEATURES will contain support for C++17 and thus the `target_compile_features(<target> ... cxx_std_17)` will succeed. Signed-off-by: Torsten Rasmussen <Torsten.Rasmussen@nordicsemi.no>
27 lines
1.1 KiB
CMake
27 lines
1.1 KiB
CMake
set(c23id c2x gnu2x)
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set(c17id c17 c18 gnu17 gnu18 "iso9899:2017" "iso9899:2018")
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set(c11id c11 gnu11 "iso9899:2011")
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set(c99id c99 gnu99 "iso9899:1999")
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set(c90id c89 c90 gnu89 gnu90 "iso9899:1990" "iso9899:199409")
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set(compile_features_list)
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# For each id value above a compile_features_${idval} with a list of supported
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# `c_std_XX` values are created for easy lookup.
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# For example, the settings
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# - `compile_feature_c99` will contain `c_std_90;c_std_99`
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# - `compile_feature_iso9899:2011` will contain `c_std_90;c_std_99;c_std_11`
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# that can then be used to set CMAKE_C_COMPILE_FEATURES accordingly.
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foreach(standard 90 99 11 17 23)
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list(APPEND compile_features_list c_std_${standard})
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foreach(id ${c${standard}id})
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set(compile_features_${id} ${compile_features_list})
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endforeach()
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endforeach()
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set(compile_features_cpp98 cxx_std_98)
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set(compile_features_cpp11 cxx_std_11 ${compile_features_cpp98})
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set(compile_features_cpp14 cxx_std_14 ${compile_features_cpp11})
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set(compile_features_cpp17 cxx_std_17 ${compile_features_cpp14})
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set(compile_features_cpp20 cxx_std_20 ${compile_features_cpp17})
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