Upstream patch `patch-disable-multiarch-13.patch`

[zanieb]

patch-disable-multiarch-13.patch

Clang 13+ prints output with --print-multiarch, confusing CPython's configure script.

This patch disables the multiarch check since we control our build environment. See https://bugs.python.org/issue45405

Related:

• patch-disable-multiarch.patch (for Python ≤3.12)

[jjhelmus]

Reading llvm/llvm-project/issues/51469 it sounds like --print-multiarch was reporting the incorrect triple in the LLVM 13 release, a bug which has since been fixed.

This patch may still be needed because the musl builds use LLVM 14, #829, which may contain the above bug.

[jjhelmus]

Confirming that the LLVM used for the musl builds still reports an a target triple but LLVM 21 does not:

14

$ ./llvm14/llvm/bin/clang --version
clang version 14.0.3
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/jjhelmus/sandbox/./llvm14/llvm/bin

$ ./llvm14/llvm/bin/clang --print-multiarch
x86_64-linux-gnu

21

$ ./llvm21/llvm/bin/clang --version
clang version 21.1.4
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /home/jjhelmus/sandbox/llvm21/llvm/bin

$ ./llvm21/llvm/bin/clang --print-multiarch
clang: error: unsupported option '--print-multiarch'
clang: error: no input files

There is no need to upstream this patch and it can be removed once LLVM is upgraded, e.g. #829 is closed.

[zanieb]

Sweet! Should we make the patch conditional on musl and add a comment to the code?