At this moment if you want to link hubbub(and parserutils) library from C++ code it is necessary to wrap include directives with such construction extern "C" { #include <hubbub/hubbub.h> } This is not hard, but looks ugly. It is almost a standard in C's world to add this to interface headers #ifdef __cplusplus extern "C" { #endif /*header body*/ #ifdef __cplusplus } #endif I wrote simple utility placed in http://code.google.com/p/hotdox/source/browse/trunk/cpp_header_for_c/cpp_... . It insert such headers. It is not a ideal, but works great for hubbub's and parserutils's interface headers. If devs has no time for such transformation, I can do it by myself and ci to svn( if you give permission to me) or send a patch files.