gcc42 and profiling

[xorquewasp at googlemail.com]

Whist trying to compile a program using the gcc42 (actually
gnat-gcc42) port, using the -pg flag for profiling, I got the following
upon linking:

  cc -pg -c -o prog.o prog.c
  cc -pg -o prog prog.o
  /usr/bin/ld: cannot find -lgcc_p

I'm assuming this means that profiling libraries for the compiler are
missing. What do I need to do to get working libraries from the port?
There doesn't appear to be anything to set in the Makefile or any
port options whatsoever.

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