Build with --enable-shared fails on Openserver 5.0.5

[Robert Lipe]

> Egcs: egcs-1.1.2-pre2
> OS: Openserver 5.0.5
> 
> ./configure --enable-shared
> make fails because it tries to use -mcoff and -fpic together
> building libiberty

I'm suprised it made it that far.

On OpenServer, --enable-shared should be used in conjunction with
--disable-multilib.  Doing this will disable the ability to build COFF.
If you want to submit patches to make --enable-shared and multilibbing
play nice with each other, feel free.

Disclaimer: this isn't a road well-travelled on OpenServer.