Fortran 90 Compiler Mac

I have some fortran 90 code and I have written a mex gateway function for it. Everything compiled and worked OK under Windows. Now I tried compiling on a mac and I run into some problems.
First hurdle was making mex work with the provided examples (yprimef.F). Thanks to some previous posts, after editing my mexopts.sh, I managed to compile and the example seems to work OK.
Fortran

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However, when I try to mex my .f90 files (which are in free-form source), I get the following:

Fortran 90 Compiler Mac

the lines 1, 56 and 67 that trigger warnings are:
Fortran 90 Compiler MacFortran 90 compiler mac
Any suggestions how to fix that?

Fortran 90 Compiler Mac

Compiler
(Using gfortran with xcode 3.2 on Mac OS X 10.6.8 with 64 bit matlab)