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While not really a compiler, f2c is based on the UNIX FORTRAN compiler, but as it used the same backend as the C compiler, f2c emits C, which in turn can be compiled by the native compiler.

F2C can be downloaded from http://www.netlib.org/f2c/


F2C will build for MS-DOS (DPMI), Win32, and most UNIX. The biggest issue I've had testing has been the DEC Alpha because it's floating point seems to be too different.

F2c is somewhat straightforward to install... The two big 'camps' are Unix and Windows.


For UNIX systems it's easier to install tar.gz's here:

Simply extract and run:

tar -zxvf f2c.tar.gz
cd f2c
make -f makefile.u f2c

Then run:

cp f2c /usr/local/bin
cp f2c.h /usr/local/include

If all went well you should have a f2c command.

Next you'll need to download and build the IO library

Simply extract and run:

tar -zxvf libf2c.tar.gz
cd libf2c
make -f makefile.u

Then run:

cp libf2c.a /usr/local/lib

Visual C++/MS-DOS

F2c can also be built using Visual C++. The key here is that you'll have to use the .vc makefiles. For Windows/MS-DOS users it's easier to download these zip files:

then simply unzip f2c.zip somewhere, then using the CLI tools simply

cd f2c
nmake -f makefile.vc f2c.exe

This will build the f2c translator. You may wish to copy it somewhere in your path, along with the f2c.h into your include path.

Next is the IO library.

nmake -f makefile.vc

This will now generate the vcf2c.lib which you'll need to link your programs against.

Test program

Now you should be able to build a simple FORTRAN program like this:


C    Hello world
      program hello 
      print *, 'Hello!' 

Note that you'll need a blank line on the end. This just makes f2c all the happier.

Build instructions for Unix

Then run:

bash-2.01$ f2c hello.f 
   MAIN hello: 
bash-2.01$ cc hello.c -lf2c -o hello 
bash-2.01$ file hello 
hello:  Mach-O executable (for architecture m68k) not stripped 
bash-2.01$ ./hello 

Build instructions for Windows

c:\temp\x>f2c\f2c hello.f
   MAIN hello:

c:\temp\x>cl hello.c -If2c libf2c\vcf2c.lib
Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 15.00.21022.08 for 80x86
Copyright (C) Microsoft Corporation.  All rights reserved.

Microsoft (R) Incremental Linker Version 9.00.21022.08
Copyright (C) Microsoft Corporation.  All rights reserved.



Naturally if you copy the f2c.h file into your include path, and hte vcf2c.lib into your libpath then you won't have to directly path to them.... But I think this should get you going.

Programs that build with f2c

I'm not that big into FORTRAN, but here is a small list of programs that I've built with f2c.