No shared libpthread or libdl on x86_64?

[Bill Nottingham]

Rex Dieter (rdieter at math.unl.edu) said: 
> >libpthread/libdl are shared on x86_64, much like they are on any other
> >platform. I'd guess the build script/libtool are looking in the
> >wrong place.
> 
> Except for the fact that gc (apparently) builds fine when built by hand. 
>  It only fails to find the shared libs on the Fedora Extras 
> buildsystem.  Any ideas or pointers?

On your system where it's built by hand, do you have 32-bit compilers
and/or libc installed as well?

Bill