Filter absorbed and private deps from promoted interface libraries

When promoting an absorbed library's transitive deps into cudf's public
interface, filter out deps that are themselves absorbed (already linked
via whole-archive) and LINK_ONLY entries (private link deps already
statically linked into the absorbed library).

Author: vyasr

cpp/CMakeLists.txt

@@ -1110,8 +1110,14 @@ if(BUILD_SHARED_LIBS)
     set(_${_dep}_link $<BUILD_INTERFACE:$<LINK_LIBRARY:WHOLE_ARCHIVE,${_dep}::${_dep}>>)
 
     # Promote the absorbed library's public transitive deps into cudf's public interface.
+    # Filter out deps that are themselves absorbed — they are already linked via whole-archive.
+    # Also filter LINK_ONLY entries — those are private link deps already statically linked in.
     get_target_property(_iface_libs ${_dep}::${_dep} INTERFACE_LINK_LIBRARIES)
     if(_iface_libs)
+      foreach(_absorbed IN LISTS _absorbed_deps)
+        list(REMOVE_ITEM _iface_libs ${_absorbed}::${_absorbed})
+      endforeach()
+      list(FILTER _iface_libs EXCLUDE REGEX "\\\$<LINK_ONLY:")
       target_link_libraries(cudf PUBLIC ${_iface_libs})
     endif()