[all-commits] [llvm/llvm-project] 934f79: [clang] Add support for SerenityOS (#187941)

[Lucas Chollet via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 934f795064ab201553945c59b13ce2ae543d4fcd
      https://github.com/llvm/llvm-project/commit/934f795064ab201553945c59b13ce2ae543d4fcd
  Author: Lucas Chollet <lucas.chollet at serenityos.org>
  Date:   2026-04-14 (Tue, 14 Apr 2026)

  Changed paths:
    M clang/lib/Basic/Targets.cpp
    M clang/lib/Basic/Targets/OSTargets.h
    M clang/lib/Driver/CMakeLists.txt
    M clang/lib/Driver/Driver.cpp
    M clang/lib/Driver/ToolChain.cpp
    A clang/lib/Driver/ToolChains/Serenity.cpp
    A clang/lib/Driver/ToolChains/Serenity.h
    M clang/lib/Lex/InitHeaderSearch.cpp
    A clang/test/Driver/Inputs/resource_dir_with_per_target_subdir/lib/aarch64-unknown-serenity/clang_rt.crtbegin.o
    A clang/test/Driver/Inputs/resource_dir_with_per_target_subdir/lib/aarch64-unknown-serenity/clang_rt.crtend.o
    A clang/test/Driver/Inputs/resource_dir_with_per_target_subdir/lib/riscv64-unknown-serenity/clang_rt.crtbegin.o
    A clang/test/Driver/Inputs/resource_dir_with_per_target_subdir/lib/riscv64-unknown-serenity/clang_rt.crtend.o
    A clang/test/Driver/Inputs/resource_dir_with_per_target_subdir/lib/x86_64-unknown-serenity/clang_rt.crtbegin.o
    A clang/test/Driver/Inputs/resource_dir_with_per_target_subdir/lib/x86_64-unknown-serenity/clang_rt.crtend.o
    A clang/test/Driver/Inputs/serenity_tree/usr/include/c++/v1/.keep
    A clang/test/Driver/Inputs/serenity_tree/usr/lib/crt0.o
    A clang/test/Driver/serenity.cpp
    A clang/test/Preprocessor/init-serenityos.c

  Log Message:
  -----------
  [clang] Add support for SerenityOS (#187941)

Adds support for the $arch-unknown-serenity target to the Clang front
end. This makes the compiler look for libraries and headers in the right
places, and enables some security mitigations like stack-smashing
protection and position-independent code by default.

----

A first attempt at upstreaming this patch was made
[here](https://reviews.llvm.org/D154396). I hope I fixed everything
mentioned there.

I intentionally kept `/usr/local/` in the default lookup path. I
consider it the more practical option, and I’d prefer to have the patch
merged as is and revisit the FIXME later. If this is absolutely
unacceptable to the maintainers, I will happily drop it and keep it as a
local patch until we address the underlying issue.

@MaskRay, @brad0 as you already reviewed the original patch.

---------

Co-authored-by: Daniel Bertalan <dani at danielbertalan.dev>
Co-authored-by: kleines Filmröllchen <filmroellchen at serenityos.org>
Co-authored-by: Andrew Kaster <akaster at serenityos.org>
Co-authored-by: Dan Klishch <danilklishch at gmail.com>



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