Bug#983838: missing library /usr/lib/llvm-12/lib/libomptarget.so.12

[Matthias Klose]

Package: src:llvm-toolchain-12
Version: 1:12.0.0~++rc2-1~exp1
Severity: important

seen when trying to build doxygen with llvm-12:

CMake Error at /usr/lib/llvm-12/lib/cmake/llvm/LLVMExports.cmake:1411 (message):
  The imported target "omptarget" references the file

     "/usr/lib/llvm-12/lib/libomptarget.so.12"

  but this file does not exist.  Possible reasons include:


The library is found in libomp5-12, but no package depends on libomp-12-dev,
causing a build regression compared to llvm 11. clang-12 only recommends it. Is
this expected?