You should add in your c++ source file declaration of initdisplay_
and displayevent_:
extern "C" {
int initdisplay_();
int displayevent_();
}
extern "C" means that their names "C" linking convention otherwise
c++ compilator generates names according to the c++ naming convention.
Jarek
On Thu, 1 Oct 1998, Paul Nord wrote:
> *
> ******************************************/
>
> #include "TROOT.h"
> #include "TRint.h"
> #include "MDisplay.h"
>
> extern void InitGui(); // initializer for GUI needed for interactive
> interface
> VoidFuncPtr_t initfuncs[] = { InitGui, 0 };
>
> // Initialize the ROOT system
> TROOT root("Rint","The ROOT Interactive Interface", initfuncs);
> TRint *theApp;
> MDisplay *display;
>
>
> int initdisplay_() {
> // Create interactive interface
> theApp = new TRint("ROOT example", NULL, 0, NULL, 0);
> display = new MDisplay("display");
> return(0);
>
> }
>
>
> int displayevent_() {
> theApp->Run(kTRUE);
> return(0);
> }
> --------------------------
>
>
> And the makefile:
>
> CXX = cxx
> CXXFLAGS = -O -D__osf__ -D__alpha -I$(ROOTSYS)/include -V
> LD = cxx
> LDFLAGS = -g
> SOFLAGS = -Wl,-expect_unresolved,* -call_shared
> GLIBS = $(ROOTSYS)/lib/*.so -lX11 -lm -lPW -lXm -lXt
>
> F77FLAGS = +ppu -K -V -cross_reference -names as_is
>
> test.o : test.f
> f77 -c $(F77FLAGS) test.f -o test.o
>
> FortranInterface.o : FortranInterface.C
>
>
> ftest : $(TEST_OBJS)
> @echo "Creating Fortran frontend ..."
> f77 -o ftest $(GLIBS) -lcxx -K $(TEST_OBJS) -cross_reference -V
> @echo "done"
>
> ______________________
>
> (Trust me that the rest of the TEST_OBJS compile just fine. And that the list
> of files does include test.o and FortranInterface.o).
>
> The error from the f77 of ftest is:
>
> ld:
> Unresolved:
> initdisplay_
> displayevent_
> fort: Severe: Failed while trying to link.
> make: *** [ftest] Error 1
>
> ???,
> Paul Nord
>
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