[core] Specify linker options as PRIVATE

They should not be propagated to targets that link against libCling
(which also nobody should do).

Author: hahnjo

core/metacling/src/CMakeLists.txt

@@ -222,18 +222,18 @@ if(MSVC)
 endif()
 
 if(APPLE)
-  target_link_libraries(Cling PUBLIC -Wl,-w -Wl,-bind_at_load)
+  target_link_libraries(Cling PRIVATE -Wl,-w -Wl,-bind_at_load)
 elseif(NOT MSVC)
   # Require the linker to resolve the symbol internally and prevent
   # conflicts when linked with another software using also LLVM like in
   # the problem reported for Julia in
   # https://github.com/JuliaHEP/ROOT.jl/issues/17#issuecomment-882719292
   # and by ALICE in https://github.com/root-project/root/issues/19889
   # Only needed for Linux: Mac uses linker namespaces and  Windows explicit export/import
-  target_link_libraries(Cling PUBLIC -Wl,-Bsymbolic)
+  target_link_libraries(Cling PRIVATE -Wl,-Bsymbolic)
 endif()
 
 if (CMAKE_SYSTEM_NAME MATCHES FreeBSD)
-  target_link_libraries(Cling PUBLIC util procstat)
+  target_link_libraries(Cling PRIVATE util procstat)
 endif()