On Sun, 24 Apr 2022, 17:59 C. David Whiteman via Gcc-help, < gcc-help@xxxxxxxxxxx> wrote: > Am having some trouble compiling a simple fortran program on my M1 MacBook > Air. I am using the latest MacOS, Monterey 12.3.1, and the latest version > of Xcode. I installed Homebrew and gcc to update my old version of > gfortran. The fortran program on my desktop will compile when I use the > command gfortran -c skippy.f, producing the executable file skippy.o That's not an executable file, it's an object file. You used the -c option which says to stop after compilation and not link the object into an executable. If you remove the -c option you'll get an executable. on my desktop. But I can’t get the executable file to run. I am an amateur > and am really not that familiar with the unix commands, etc. Can someone > give me some advice on this? Thanks. > > -Dave > > ~/Desktop 519 $ gfortran -o skippy.f > gfortran: fatal error: no input files; unwilling to write output files > compilation terminated. > ~/Desktop 520 $ gfortran -c skippy.f > ~/Desktop 521 $ ./skippy.o > -bash: ./skippy.o: Permission denied > ~/Desktop 522 $ gfortran skippy.f > ld: library not found for -lSystem > collect2: error: ld returned 1 exit status > ~/Desktop 523 $ g77 skippy.f > -bash: g77: command not found > ~/Desktop 524 $
