Problem 1662

Summary:	CLHEP::RandGaussT from Randomize.hh "does not name a type"
Product:	Geant4	Reporter:	eduard.friske
Component:	global	Assignee:	Gabriele Cosmo <Gabriele.Cosmo>
Status:	RESOLVED INVALID
Severity:	minor
Priority:	P5
Version:	10.0
Hardware:	All
OS:	All

Description eduard.friske 2014-08-12 12:14:20 CEST

When trying to create a pointer of type RandGaussT, gcc complains that "‘RandGaussT’ in namespace ‘CLHEP’ does not name a type".

Trying the same with RandGaussQ works without problems.
Both classes are defined in Randomize.hh and belong to the CLHEP namespace.

Therefore I do not understand why one class is found while the other isn't.

If this problem has already been reported I apologize, I didn't find a problem matching this.

GEANT4 version is 10.0-patch2.

Comment 1 Gabriele Cosmo 2014-08-20 10:41:16 CEST

You need to use/link with the external CLHEP library for using the RandGaussT class (i.e. configure your Geant4 installation to use system CLHEP library installed in your system).
RandGaussT is not distributed in the internal CLHEP module shipped with Geant4, as not internally used by Geant4.

Comment 2 eduard.friske 2014-08-20 10:48:28 CEST

I resorted to using RandGaussQ to work around the problem. Still good to know. Thanks.

Is there a particular reason why RandGaussT is not shipped with the internal CLHEP library?

Comment 3 Gabriele Cosmo 2014-08-20 11:02:34 CEST

The internal CLHEP module only ships classes which are relevant and/or in use within the Geant4 distribution.