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Ran 10 Sep 2026 09:50PM UTC

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Build # 524

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push

buildkite

Committed by

web-flow

Commit Message

build: don't install glibc-only libc_nonshared.a on musl targets (#63084)

`install-csl` in deps/csl.mk and the `install` target in the top-level
Makefile both copy `libc_nonshared.a` for every Linux target, but that
library is a glibc implementation detail: musl has none, and CSL
correspondingly ships none for `*-linux-musl*` triplets. Both copies
therefore abort the build on musl targets, in `make julia-deps` and in
`make install` respectively.

Introduce `LIBC` in Make.inc, derived from the libc recorded in the
normalized triplet (glibc or musl on Linux, empty elsewhere), and gate the
copies on it instead of on `OS`. `Base.Linking` already treats the file
as optional, so nothing downstream needs to change.

Upstream CI does not currently build musl, so this was only caught by the
musl cross builds of the libjulia recipe in JuliaPackaging/Yggdrasil#14705,
e.g. https://buildkite.com/julialang/yggdrasil/builds/32579#01a07c3a-2e1b-4ae0-859b-c07f1e9f64c1

Fixes #63053

Assisted-by: Claude Code (Opus 5)
Assisted-by: Claude Code (Fable 5.1)

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