You are using a wrong option that may overwrite your fortran source file 
with the result of the compilation..
To create only the .o file use:

gfortran -O3 -ffree-form*-c*  myfile.f

or, f you want:

gfortran -O3 -ffree-form*-c*  myfile.f*-o myfile.o*

it will do the same thing.

Patrick

Le 01/01/2023 à 09:52, Hans Lonsdale via Gcc-help a écrit :
>
> I want to compile a file containing a number of subroutines.
>
> I am using the command
>
> gfortran -O3 -ffree-form -o myfile.f
>
> But getting problems with recursive and END PROGRAM statement.
>
> All I want is making the object file.
>
> 44 | recursive subroutine quicksort (array)
>        | 1
> Error: Unclassifiable statement at (1)
> myfile.f:112:3:
>
>    112 | end subroutine quicksort
>        |   1
> Error: Expecting END PROGRAM statement at (1)
> myfile.f:122:35:
>
> Have done
>
> gfortran -O3 -ffree-form -o myfile.f
>
> The command is supposed to make the object file, but I get errors with END PROGRAM declaration.
>
>