doxygen/doxygen-no-libclang-cpp.patch

--- doxygen-1.8.20/src/CMakeLists.txt.orig	2020-10-06 15:56:02.841527965 +0200
+++ doxygen-1.8.20/src/CMakeLists.txt	2020-10-06 16:07:14.226206979 +0200
@@ -341,7 +341,7 @@
         set(CLANG_LIBS libclang clangTooling)
     else() # dynamically linked version of clang
         llvm_config(doxymain USE_SHARED support)
-        set(CLANG_LIBS libclang clang-cpp)
+        set(CLANG_LIBS libclang clangTooling)
     endif()
     target_compile_definitions(doxygen PRIVATE ${LLVM_DEFINITIONS})
 endif()