libLLVM13
libclang-cpp13
llvm13-devel
  provides "llvm-devel-<targettype> = <version>"
  conflicts "otherproviders(llvm-devel-<targettype>)"
clang13-devel
  provides "clang-devel-<targettype> = <version>"
  conflicts "otherproviders(clang-devel-<targettype>)"