Build failure: llvmPackages.libc

[SFrijters]

Nixpkgs version

• Unstable (26.11)

Steps to reproduce

Attempt to build llvmPackages.libc

Can Hydra reproduce this build failure?

Yes, Hydra can reproduce this build failure.

Link to Hydra build job

https://hydra.nixos.org/job/nixpkgs/unstable/llvmPackages_21.libc.x86_64-linux

Relevant log output

┃        > FAILED: [code=1] compiler-rt/lib/sanitizer_common/CMakeFiles/RTSanitizerCommon.x86_64.dir/sanitizer_platform_limits_posix.cpp.o
┃        > /nix/store/xp4knvpm38spcs9rk4dyg1scrg14i9q0-clang-wrapper-21.1.8/bin/clang++ -DHAVE_RPC_XDR_H=0 -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/build/libc-src-21.1.8/compiler-rt/lib/sanitizer_common/.. …
┃        > /build/libc-src-21.1.8/compiler-rt/lib/sanitizer_common/sanitizer_platform_limits_posix.cpp:160:10: fatal error: 'linux/scc.h' file not found
┃        >   160 | #include <linux/scc.h>
┃        >       |

Additional context

I think this may need the same patch as llvmPackages.compiler-rt: # Linux removed linux/scc.h, which breaks building compiler-rt. Upstream LLVM has fixed it in LLVM 22 and 23.

System metadata

• system: "x86_64-linux"
• host os: Linux 6.18.44, NixOS, 26.11 (Zokor), 26.11.20260813.0e251e2
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 2.34.8
• nixpkgs: /nix/store/31w94yhfpllma9jnlgavjkzsfs548ijx-source

Notify maintainers

@NixOS/llvm

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