On 29 April 2011 15:11, wayne schlemitz wrote: > Jonathan: > > I checked the /bits/mathcalls.h as you suggested. Both the pow() and exp() are there. When I compile the program gcc -o gomp gomp.c I get the following error message undefined reference to 'pow'. What am I missing and what should I do next? Please reply to the mailing list, not just to me, thanks. As it tells you in the man pages for pow and exp: Link with -lm.