Bug#1101291: coinstallation failure of various llvm-toolchain-snapshot packages

[Helmut Grohne]

Package: libc++-21-dev,libc++1-21,libc++abi-21-dev,libc++abi1-21,libclang-rt-21-dev,libmlir-21,libmlir-21-dev,libpolly-21-dev,libunwind-21,libunwind-21-dev
Version: 1:21~++20250322080030+20b5728b7b1c-1~exp1
Severity: serious
User: debian-qa at lists.debian.org
Usertags: fileconflict

The named packages fail to coinstall despite explicitly declaring that
capability via Multi-Arch: same. Most of them install
architecture-dependent files to architecture-independent filenames below
/usr/lib/llvm-21/lib. Please either move those files to multiarch
locations or remove the Multi-Arch: same annotations.

Helmut