c++/8847: dynamic_cast segfaults with shared lib

[Markus Hillebrand]

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit- 
trail&database=gcc&pr=8847

Hi!

Maybe I can provide a hint on that problem ...

Today I had some similiar problems by updating some
of my libraries and some other sources. I also had a
segmentation-fault on a dynamic_cast. After reading this
posting I remembered, that problems can occur, when
using shared libraries are used without using the -fPIC
compiler option.

I recompiled the library (omniORB-4.0.0, RedHat 7.3 x-86 Linux,
with gcc-3.2.1) and my source with this option and the problem
disappeared. I think this is some nasty thing, that there is no
(linker) check about that. Maybe someone will provide some more
comfortable checkings here ...

	With best regards,
	M. Hillebrand