Linux linker errors with binutils >= 2.27

[Marco Leise via Digitalmars-d]

This is the bug report for binutils 2.28 and the "module is
already defined in" error:

https://issues.dlang.org/show_bug.cgi?id=17375

Basically you need to add -fPIC to the command line for the
executable when linking against shared objects. One way to do
so is to add that switch to dmd.conf. Now that x86 32-bit is
dying I feel that's acceptable in most situations.

-- 
Marco