When rootcint encounters a data member that is a pointer to a
fundamental type, it prints a Warning message calling for manual
intervention, because rootcint has no way to know the length of the
array corresponding to the pointer.
This is explained in
http://root.cern.ch/root/HowtoWrite.html
see also the course 3 of Root at
ftp://root.cern.ch/root/course3.ps.gz
In your example, you have two possibilities:
A- Recommended
Replace you data members Text_t * by TString objects
and Streamer will be automatic.
Text_t *l_DocumentClass; // Latex cmd documentclass
Text_t *l_UsePackage; // Latex cmd usepackages
by
TString l_DocumentClass; // Latex cmd documentclass
TString l_UsePackage; // Latex cmd usepackages
B- using your class header unmodified
You must modify the Streamer function adding statements like:
in Read part
Int_t l;
R__b >> l; // read string length
R__b.ReadFastArray(l_DocumentClass,l); //read array
in write part
Int_t l = strlen(l_DocumentClass) +1;
R__b.WriteFastArray(l_DocumentClass,l);
In the second case, you should copy the Streamer function in the
implementation of your class and modify your LinkDef.h file
by adding the symbol "-" in front of the class name to prevent rootcint
to generate the Streamer function itself.
Rene Brun
mayer@ik1.fzk.de wrote:
>
> Hello!
>
> Whats wrong with the following declaration of pointers
> l_DocumentClass and l_UsePackage? When trying to link a shared library,
> rootcint complains, and the library cant be loaded by root.
> Thanks in Advance. Hajo!
>
> This is rootcint output:
> ------------------------
> [hajo@halimash cxx]$ make
> Generating dictionary ...
> *** Datamember LAVaDocumentAtt::l_DocumentClass: pointer to fundamental type
> (need manual intervention)
> *** Datamember LAVaDocumentAtt::l_UsePackage: pointer to fundamental type
> (need manual intervention)
> g++ -O -Wall -fPIC -I/cern/root/2.0b3/root/include -c lavaCint.cxx
>
> THis is the header definition
> -----------------------------
> #include "TNamed.h"
>
> class LAVaDocumentAtt : public TNamed {
>
> private:
>
> Text_t *l_DocumentClass; // Latex cmd documentclass
> Text_t *l_UsePackage; // Latex cmd usepackages
>
> public:
>
> LAVaDocumentAtt();
> LAVaDocumentAtt(const char *name, const char *title);
> ~LAVaDocumentAtt();
> void SetDocumentClass(Text_t *options, Text_t *style);
> void SetUsePackage(Text_t *options, Text_t *packages);
> void Print();
> Text_t *GetDocumentClass() {return l_DocumentClass;}
> Text_t *GetUsePackages() {return l_UsePackage;}
>
> ClassDef(LAVaDocumentAtt,1) // Latex document Attributes
> };
> #endif //________________________________________________________________________
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