collect2: ld returned 1 exit status

[Pep]

I am getting this message when building a application but do not have
any idea what is causing the problem.  The output that goes with it is
just the normal output of the g++ command.  I have tried the --verbose
cli flag to the g++ command but this gives no further information.

Any ideas on how I can get more information from ld and collect2 to see
what the problem is?

TIA,
Pep.