Gentoo's Bugzilla –
Attachment 844935 Details for
Bug 888533app-text/podofo-0.9.8 fails to compile: StringHelper.h:25:9: error: no match for operator<< (operand types are CppUnit::OStringStream {aka std::__cxx11::basic_ostringstream<char>} and const PoDoFo::PdfString)