Make use of RUNTIMES_USE_LIBC to build libcxx#623
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voltur01 merged 1 commit intoarm:arm-softwarefrom Dec 2, 2025
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Make use of RUNTIMES_USE_LIBC CMake option to indicate which C library is used to build libcxx. This option was enabled in llvm/llvm-project#147956 instead of hardcoded check for corresponding C library header files.
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Fix up for arm#623: RUNTIMES_USE_LIBC=llvm-libc has special handling in https://github.com/llvm/llvm-project/blob/8feb6762ba9fb83f8e13ef9486c3b743e1b5cfa7/runtimes/cmake/Modules/HandleLibC.cmake#L26 that breaks ATfE build by adding -nostdlibc option. Keep using the default system option for now, llvm-libc handling needs further investigation.
voltur01
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Fix up for #623: RUNTIMES_USE_LIBC=llvm-libc has special handling in https://github.com/llvm/llvm-project/blob/8feb6762ba9fb83f8e13ef9486c3b743e1b5cfa7/runtimes/cmake/Modules/HandleLibC.cmake#L26 that breaks ATfE build by adding -nostdlibc option. Keep using the default system option for now, llvm-libc handling needs further investigation.
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Make use of RUNTIMES_USE_LIBC CMake option to indicate which C library is used to build libcxx.
This option was enabled in llvm/llvm-project#147956 instead of hardcoded check for corresponding C library header files.