This free GNU Fortran 77 for DOS compiler is very easy to setup and comes as binaries. (Please note that this Fortran compiler is for DOS and does not work well under Windows 95. Refer to the Compilers page for information on native Win32 Fortran compilers such as Mumit Khan's implementation.)

Information on the package is available under the title of GNU's Fortran77 for DOS (g77) at:

• Home site - http://www.star.le.ac.uk/~cgp/fortran.html
• CCP14 Mirror

To obtain the binaries, grab the zip files from the above web pages.

Installing the Compiler

• Using an unzipping program to extract the zip file into a subdirectory (In this case, C:\g77). Two unzipping programs are:
  • PKWARE/PKZIP at http://www.pkware.com; FTP Site: ftp://ftp.pkware.com; CCP14 Mirror
  • Winzip at http://www.winzip.com; FTP Site: ftp://ftp.winzip.com; CCP14 Mirror

• Edit the c:\autoexec.bat and add:
  • The line SET C_INCLUDE_PATH=C:\G77\EMX\INCLUDE
  • The line SET LIBRARY_PATH=C:\G77\EMX\LIB
  • Into the PATH statement add, C:\G77\EMX\BIN;
• Reboot your computer for this to have an effect. DONE!

Running F77 for DOS Compiler

• Just run a DOS session which now gives you access F77 option under the GNU file name convention of g77. Following is an example of compiling a small fortran program going by the name of MYTEST

  Don't forget to specify the .exe extension if you use the "-o" option as per the following example.

• 

You can also build a "Hello World" program with source code filename as SMTEST.F and compile it to test things out.

     PROGRAM SMTEST
     DO 10 I=1, 10
         PRINT *, 'Hello World #', I
10   CONTINUE
     END

Build it using the command g77 -o SMTEST.EXE SMTEST.FOR