[PATCH] D100944: [MC][ELF] Emit separate unique sections for different flags

[ben via Phabricator via llvm-commits]

bd1976llvm added a comment.

In D100944#2870297 <https://reviews.llvm.org/D100944#2870297>, @MaskRay wrote:

>> Augment compiler section attribute to allow specifying the section flags as well as the section name.
>
> Recent GNU as reports errors for changed section attributes, so gcc with such a GNU as will report an error
>
>   % cat a.c
>   asm(".section debug_special,\"\", at progbits");
>   __attribute__((used, section("debug_special"))) int var;
>   
>   % gcc -c a.c
>   /tmp/ccrwXjUO.s: Assembler messages:
>   /tmp/ccrwXjUO.s:7: Error: changed section attributes for debug_special
>
> So I think a compiler oriented solution is more appropriate than a linker oriented one.
> A GNU attribute beside `section` looks good to me. Such a request needed to be raised on the GCC Bugzilla.

Thanks for the feedback, very much appreciated. I agree that a compiler based solution is more appropriate.

We appear to have the only codebase with this issue. Therefore, we are currently looking hard to see if there is any way to  rewrite or remove the feature.

If this is not possible we will persue a new toolchain feature to support our use case.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D100944/new/

https://reviews.llvm.org/D100944