From: Tom Flynn (flynnt++at++engr.sgi.com)
Date: 07/31/2002 09:44:28
hi,
this was a problem with the gcc-2.x version of compilers. to fix this
problem, you'll need to upgrade your compiler to gcc-3.0.2 or higher and
download the gcc3 version of performer.
-tom
On Wed, 31 Jul 2002, Steffen, Keith wrote:
> I need some help with a problem concerning dynamic_cast and Performer:
>
> I can not seem to get a program which has any dynamic_cast in it to work if
> it is linked with Performer.
>
> Here is an example:
>
> -------- caster.C
>
> #include <iostream>
> class cBase
> {
> public:
> cBase() { cout << "In cBase::cBase" << endl; }
> virtual void Func() { cout << "In cBase::Func" << endl; }
> };
>
> class cDerived : public cBase
> {
> public:
> cDerived() { cout << "In cDerived::cDerived" << endl; }
> virtual void Func() { cout << "In cDerived::Func" << endl; }
> };
>
> void main()
> {
> cBase *Base = new cDerived;
> cDerived *Derived = dynamic_cast<cDerived *>(Base);
> Derived->Func();
> }
>
> --------
>
> g++ caster.C -o caster
> ./caster
> In cBase::cBase
> In cDerived::cDerived
> In cDerived::Func
>
> So far so good, Now try this:
>
> g++ caster.C -o caster_broke -lpf
> ./caster_broke
> In cBase::cBase
> In cDerived::cDerived
> Segmentation Fault
>
> Just linking the Performer library breaks the program.
>
> I'm currently running RedHat Linux 7.3 with the version 2960 of the NVIDIA
> kernel and GLX rpms.
>
> g++ -v returns
>
> Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/2.96/specs
> gcc version 2.96 20000731 (Red Hat Linux 7.3 2.96-110)
>
> rpm --query --info --file /usr/lib/libpf.so.2 returns
>
> Name : performer_eoe Relocations: (not relocateable)
> Version : 2.5.1 Vendor: SGI
> Release : 0 Build Date: Fri 03 May 2002
> 05:53:53 PM CDT
> Install date: Mon 29 Jul 2002 03:55:58 PM CDT Build Host:
> dice.engr.sgi.com
> Group : Libraries Source RPM:
> performer_eoe-2.5.1-0.src.rpm
> Size : 16081415 License: Silicon Graphics,
> Inc.
> Packager : Silicon Graphics <mongoose-feedback++at++corp.sgi.com>
> URL : http://www.sgi.com/software/performer
> Summary : Performer Execution Only Environment
> Description :
> OpenGL Performer is a high-performance 3D rendering toolkit for developers
> of real-time, multiprocessed, interactive graphics applications. OpenGL
> Performer dramatically simplifies development of complex applications such
> as visual simulation, simulation-based design, virtual reality, interactive
> entertainment, broadcast video, CAD, and architectural walk-through.
>
> I've tried the Performer RPMS at the download site for gcc 2.96 and still
> have had no luck.
>
> Is anyone running a Linux configuration that dynamic_cast and Performer
> (together) work on?
>
> Keith Steffen
> Senior Staff Engineer
> TOPSCENE Program
> Lockheed Martin Missiles and Fire Control - Dallas
> P.O Box 650003 M/S: SP-72 Dallas, Texas 75265-0003
> Telephone: 972-603-9027 Facsimile: 972-603-9013
> Beeper: 972-328-7841
> E-mail: keith.steffen++at++lmco.com
>
>
> -----------------------------------------------------------------------
> List Archives, Info, FAQ: http://www.sgi.com/software/performer/
> Open Development Project: http://oss.sgi.com/projects/performer/
> Submissions: info-performer++at++sgi.com
> Admin. requests: info-performer-request++at++sgi.com
> -----------------------------------------------------------------------
>
-- "Mongooses are famous for their snake-fighting ability, and are almost always victorious because of their speed, agility, and timing and also because of their thick coat."
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