Hi,
I want to prepare some global functions and constants
which should be visible in ROOT. I found an example
for the constants, but with the functions it seems different.
Here what I tried:
// ----------------- this is DGlobalTools.h -------------
#ifndef _DGlobalTools_included_
#define _DGlobalTools_included_
#include <math.h>
#include "Rtypes.h" // important to tell about ClassDef()
#define M_PI 3.14159265358979323846 // example to make constants global
double const gPI = M_PI; // this gPI is really `visible'in CINT
float gPoly(float tArg ,float* p, int tOrder); // now a function
class DGlobalTools { // and a class
public:
DGlobalTools(){;}
void Dummy();
ClassDef(DGlobalTools,1)
};
with its implementation
//--------------------- this is DGlobalTools.cxx
//*KEEP,DGlobalTools.
#include "DGlobalTools.h"
//*KEND.
ClassImp(DGlobalTools)
float gPoly(float tArg ,float* p, int tOrder){
float f = p[0];
for (int k = 1; k < tOrder; k++){
f += p[k] * pow(1.*tArg,1.*k);
}
return f;
}
void DGlobalTools::Dummy(){} // some other global mess to be prepared
and in LinkDef.h using pragmas as described
#ifdef __CINT__
#pragma link off all globals;
#pragma link off all classes;
#pragma link off all functions;
#pragma link C++ class DGlobalTools;
#pragma link C++ global gPI;
#pragma link C++ global gPoly;
#endif
The constant gPI is available in ROOT's CINT, but
gPoly is not. I also tried
#pragma link C++ function gPoly;
which makes no difference.
What should I do to have gPoly() visible?
Dirk
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