libLLVM11
libclang11
libLTO11
llvm11-devel
  provides "llvm-devel-<targettype> = <version>"
  conflicts "otherproviders(llvm-devel-<targettype>)"
clang11-devel
  provides "clang-devel-<targettype> = <version>"
  conflicts "otherproviders(clang-devel-<targettype>)"
llvm11-LTO-devel
  provides "llvm-LTO-devel-<targettype> = <version>"
  conflicts "otherproviders(llvm-LTO-devel-<targettype>)"