Tracing ELF shared libs.

[Paul.Sargent@dial.pipex.com]

Thanks, I'll start grabbing 4.17 and ld-linux.so. I let you know if things
don't work out.

Paul

> 
> The stepping problem should be fixed in gdb-4.17.
> 
> > warning: Unable to find dynamic linker breakpoint function.
> > warning: GDB will be unable to debug shared library initializers
> > warning: and track explicitly loaded dynamic code.
> > [What does this mean?]
> 
> You have to upgrade ld-linux.so to a newer version to fix this.
> If you do not want to debug problems in the initialization of global C++
> objects, or shared libraries which are accessed via dlopen, you can
> ignore this message and stick with your current ld-linux.so.
>