Hi, I recently downloaded the gfortran compiler for my new ibook with OSX 10.3.5 I tried compiling a simple fortran program named hello.f90 The command I issued was: gfortran -o a.out hello.f90 The error I get is: Claws-Computer:~/test/practice Claw$ gfortran -o a.out hello.f90 /usr/bin/ld: can't locate file for: -lcrt1.o collect2: ld returned 1 exit status When I compile using the -c flag to produce an object file, it works. Then when I try to make the executable the same error happens. Im pretty new at fortran and Mac, and could really use a suggestion. Thanks, Jeff