Rollup merge of #150468 - Gelbpunkt:rustc-target-callconv-spec-elf-abi, r=RalfJung

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rustc_target: callconv: powerpc64: Use the ABI set in target options instead of guessing

All PowerPC64 targets except AIX explicitly set the ABI in the target options. We can therefore stop hardcoding the ABI to be used based on the target environment or OS, except for the AIX special case.

The fallback based on endianness is kept for the sake of compatibility with custom targets.

This makes it so that big endian targets not explicitly accounted for before (powerpc64-unknown-openbsd) and targets that don't use the expected default ABI (big-endian ELFv2 Glibc targets) use the correct ABI in the calling convention code.

The second commit is a tiny change to validate the `llvm_abiname` set on PowerPC64(LE) targets. See the commit messages for details.

CC @RalfJung who pointed out the missing `llvm_abiname` validation

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Jonathan Brouwer 2026-02-22 11:31:11 +01:00 committed by GitHub

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