Package: src:llvm-toolchain-21 Version: 1:21.1.2-3 Severity: serious Tags: sid forky
binutils-gold is still required in LLVM's autopkg tests, and therefore the tests fail and the package fails to migrate.
The odd thing is, that apparently you need to build LLVM with gold to have the support to use gold at runtime. I haven't checked why, but that makes the use of the -fuse-ld=<linker> not so useful.

