Try to fix https://build.kde.org/view/Failing/job/KDevelop/job/kdev-css/job/kf5-qt5%20WindowsMSVCQt5.14/
kdev4cssparser.lib(kdev4cssparser.dll) : error LNK2005: "public: __cdecl Css::Tokenizer::Tokenizer(class KDevPG::TokenStream *,class QString const &)" (??0Tokenizer@Css@@QEAA@PEAVTokenStream@KDevPG@@AEBVQString@@@Z) already defined in tokenizer.cpp.obj
tokenizer.cpp is both in the target kdev4cssparser and css-parser. It should be only on one.