Re: problem with dynamic_cast

[David Starks-Browning <starksb at ebi dot ac dot uk>]

On Friday 8 Sep 00, Chris Faylor writes:
> On Fri, Sep 08, 2000 at 12:46:31PM -0400, Chris Faylor wrote:
> >On Fri, Sep 08, 2000 at 10:18:42AM -0400, Fleischer, Karsten (K.) wrote:
> >>How about including the stub libraries in the distribution, rather than the
> >>symlinks?
> >
> >The reason for the symlinks is that some packages search libc.a and libm.a
> >for symbols.
> >
> >If linking libc.a twice causes problems, then it *is* a bug in either gcc or
> >ld.
> >
> >Mumit had vowed once to fix this problem but then he disappeared...
> 
> Ok, I looked into this.  It is a linker problem.  Specifying -lm or -lc on
> the command line causes ld to put symbols into the import section in improperly
> sorted order.
> 
> This confuses the Windows "dynamic loader" (and I use the term loosely) so that
> certain function calls (namely strcmp and strlen) are not resolved.  So when
> a function in libgcc needs to call strcmp it ends up jumping into unallocated
> memory, causing a SIGSEGV.
> 
> That's the analysis.  I have no idea how to fix this, but I've sent some details
> to DJ in the hopes that he'll be able to do something about this.

Would it be helpful if I put this in the FAQ?
(Under "Known Problems in the Current Net Release".)

Cheers,
David


--
Want to unsubscribe from this list?
Send a message to cygwin-unsubscribe@sourceware.cygnus.com