Try this : #ifdef HAVE_ROOT ClassDef(PDFSet,1) }; #else }; #endif Vincent On Thursday 30 October 2003 11:09, Jiri Masik wrote: > Hi, > > I have written an interface to the pdflib library. While Root is not > necessary for its function I'd like to extend it by some features if > Root is available on a given system. So I have the following lines > > class PDFSet > #ifdef HAVE_ROOT > > : public TObject > > #endif > { > > public: > PDFSet(); //keep the currently set PDF > PDFSet(Int_t Type, Int_t Group, Int_t Set); //set PDF > > ~PDFSet(); > private: > UShort_t fType; // PDF type > UShort_t fGroup; // PDF group > UShort_t fSet; // PDF set > > #ifdef HAVE_ROOT > ClassDef(PDFSet,1) > #endif > }; > > It probably fails due to the limitation on the position of the > ClassDef macro which has to be on the last line before };. If it is > surrounded by #ifdef/#endif there is an unresolved reference > PDFSet::ShowMembers(TMemberInspector&, char*) whenever I attempt to > load the library into Root. Is there a way around this? > > thanks > > Jiri
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