We use a simple example to introduce both Fortran M and the Fortran M compiler. We assume that Fortran M is already installed on your computer. (If it is not, read the documentation provided with the Fortran M software release.)
Before you can use Fortran M, you must tell your environment where to find the compiler. (Normally, this will be /usr/local/fortran-m, but some systems may place the compiler in a different location.) If you are using the standard Unix C-shell (csh), you add one line to the end of the file .cshrc in your home directory. If the compiler has been installed in /usr/local/fortran-m, this line is
The environment variable path tells the Unix shell where to find various programs such as the Fortran M compiler. This shell command adds the directory containing the compiler to your shell's search path. You may have to log out and log in again for this to take effect.