On Sun, Apr 27, 2025 at 03:46:56PM +0000, Yao Zi wrote: > On Sun, Apr 27, 2025 at 05:19:04PM +0200, Heinrich Schuchardt wrote: > > Am 27. April 2025 16:50:10 MESZ schrieb Yao Zi <zi...@disroot.org>: > > >Clang's preprocessor may emit extra spaces for lines starting with '#'. > > >Lines with these extra characters cannot be handled by Kconfig and will > > >be ignored with warnings like, > > > > > > > > > Do you have an example for reprocing the issue? > > Sure, > > clang-19 -E -nostdinc -P -I . -undef -x assembler-with-cpp \ > configs/starfive_visionfive2_defconfig > > or a smaller example for demonstrating the behaviour, > > cat << EOF | clang -E -P -x assembler-with-cpp - > # comment line > normal line > EOF > > and you could see the strange indentation. For reproducing the exact > Kconfig warnings, > > make ARCH=riscv \ > CC='clang-19 --target=riscv64-unknown-linux-musl' \ > starfive_visionfive2_defconfig > > (Clang is called clang-19 on my machine) > > > Is there an understanding why Clang behaves in this way? > > Sadly I have no idea. I guess it may serve for improving > human-readability of the preprocessed output.
This is https://github.com/llvm/llvm-project/issues/78778 -- Tom
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