apt.llvm.org packages missing cmake target

[kimgr]

The clang-resource-headers target was turned into an interface library, and exported, in 8d468c1. I see the Clang packages from apt.llvm.org are past that point in Git history now, but the clang-resource-headers target is not available.

It shows up in /usr/lib/llvm-20/ClangConfig.cmake:

set(CLANG_EXPORTED_TARGETS "clang-tblgen;clang-resource-headers;clangBasic;[...]

but there's no trace of its definition in /usr/lib/llvm-20/ClangTargets.cmake.

I'm not sure if this is a problem with the target definition, or if something happens in packaging that causes it to be lost.

cc: @etcwilde

[firewave]

Looks like it is simply in a different location:

$ dpkg -S ClangTargets.cmake
clang-20: /usr/lib/llvm-20/lib/cmake/clang/ClangTargets.cmake
[...]

[firewave]

May be related to #45628.