Chris:
when generating a dictionary you need to add a link definition
file with the following line
#pragma link C++ function cuber;
in it. rootcint does it automatically for the class names, but not for
functions. -regards, pasha.
--------------------------------------------------------------------------------
Chris Jillings writes:
>
> Hello,
> I tried to make a shared library with one function in it. I was able
> to build the shared lib with no errors and load it into root. I just could
> not execute the function in the interpreter.
>
> This is the root interpreter interaction. The .h, .C and a snippet of the
> Makefile are below.
>
> Thank you in advance for your help.
>
> Chris
>
>
> root [0] gSystem->Load("libcuber.so");
> root [1] Double_t x,y;
> root [2] x =5.0;
> root [3] y = cuber(x);
> Error: No symbol null in current scope FILE:/tmp/09951daa LINE:1
> root [4]
>
> The cuber.h file was
>
> #ifndef __CUBER_H
> #define __CUBER_H
> #include "Rtypes.h"
>
> Double_t cuber(Double_t x);
>
>
> #endif
>
> The cuber.C file was
>
> #include "Rtypes.h"
> Double_t cuber(Double_t x) {
> Double_t retvar = x*x*x;
> return retvar;
>
> }
>
> I made everything with the usual procedure
>
> cuberdict.C: cuber.C cuber.h
> echo "generating cuber dictionary"
> rootcint cuberdict.C -c $(INCLUDE) $(ROOTOBJ) cuber.h
>
> cuberdict.o: cuberdict.C
> $(CXX) -c $(CXXFLAGS) cuberdict.C
>
> cuber.o: cuber.C cuber.h Makefile
> $(CXX) -c $(CXXFLAGS) $(ROOTOBJ) cuber.C
>
> libcuber: cuber.o cuberdict.o
> $(LD) $(LDFLAGS) $(SOFLAGS) cuber.o cuberdict.o $(GLIBS) \
> -o libcuber.so
>
>
> The Makefile definitions were unchanged since successfully putting classes
> into a shareled lib.
>
>
>
> =================================================================
> = =
> = Chris Jillings =
> = Department of Physics phone/voice mail: (613) 545-6000x4805 =
> = Queen's University fax: (613) 545-6813 =
> = Kingston, Ontario email: chris@sno.phy.queensu.ca =
> = Canada, K7L 3N6 web: http://sno.phy.queensu.ca =
> = =
> =================================================================
>
>
>
This archive was generated by hypermail 2b29 : Tue Jan 04 2000 - 00:34:38 MET