Re: c++/8847: dynamic_cast segfaults with shared lib

[<christoph.wiedemann@daimlerchrysler.com>]

The following reply was made to PR c++/8847; it has been noted by GNATS.

From: <christoph.wiedemann@daimlerchrysler.com>
To: <nobody@gcc.gnu.org>, <gcc-bugs@gcc.gnu.org>,
        <hans.utz@informatik.uni-ulm.de>, <gcc-prs@gcc.gnu.org>,
        <gcc-gnats@gcc.gnu.org>, <himself@markus-hillebrand.de>
Cc:  
Subject: Re: c++/8847: dynamic_cast segfaults with shared lib
Date: Mon, 27 Jan 2003 14:00:23 +0100

  =20
 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=3Dview%20audit-trail&databas=
 e=3Dgcc&pr=3D88
 47
 
 Hi,
 
 i had the same problem with linking against libGLU.so.=20
 It seems to be that dynamic_cast is internally using the symbol __dynam=
 ic_cast,=20
 which is exported by libGLU:
 
 >nm /usr/lib/libGLU.so | grep dynamic_cast
 >0007b1d4  T  __dynamic_cast
 
 but also by libstdc++:
 
 >nm /usr/local/lib/libstdc++.so | grep dynamic_cast
 >00050a00  T  __dynamic_cast
 
 In my case, it is enough to export the environment variable LD_PRELOAD =
 to the=20
 /usr/local/lib/libstdc++.so, or to pass the linker flag -lstdc++ as the=
  _first_=20
 -l option.
 
 Kind Regards,
 -----------------------------------------------------------------------=
 ---------
 ----- Christoph Wiedemann=20
 DaimlerChrysler AG, Research Center Ulm=20
 P.O. Box 2360, 89013 Ulm, Germany=20
 
 Phone: +49 731 505 4123=20
 e-mail: christoph.wiedemann@daimlerchrysler.com=20
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