From: Judah Milgram <milgram AT eng DOT umd DOT edu>
Date: Thu, 15 Dec 1994 08:49:49 -0500
To: djgpp AT sun DOT soe DOT clarkson DOT edu
Subject: How to f2c+djgpp


A few weeks ago I asked this question and with a little help managed to
get it working. It seems to be a popular topic so here's the summary of 
the changes. Should this go in the FAQ? Could a pre-compiled libf2c.a 
be placed in some public ftp site? Should a libf2c.a and f2c.h be 
included in the djgpp release?

Judah Milgram
milgram AT glue DOT umd DOT edu


*** Running f2c with djgpp.

The following changes to the f2c libraries allow compiling and 
linking with djgpp. I started with an f2c version dated Nov. 1994. 
DJGPP was v. 1.12. These aren't necessarily the most sensible 
changes, but they worked for me. Please write if you have a better 
idea.

As for the f2c program itself you can use the pre-compiled MSDOS 
executable that comes with the f2c release. Look in netlib.att.com
in netlib/f2c.

Thanks to various net people, especially Dr. James Lupo, for their
help on this.

Judah Milgram
milgram AT glue DOT umd DOT edu

______________________________________________________________________

libf77/makefile:

change: CC = cc    to: CC = gcc

comment out:
        ld -r -x -o $*.xxx $*.o
        mv $*.xxx $*.o

libf77/s_paus.c:

change:
extern int getpid(void), isatty(int), pause(void);
to:
extern int getpid(void), isatty(int);
#ifndef _djgpp_std_h
extern int pause(void);
#endif

libi77/makefile:

change: CC = cc    to: CC = gcc

comment out:
        ld -r -x -o $*.xxx $*.o
        mv $*.xxx $*.o

libi77/fio.h: 

add to top of file:

#ifdef abs
#undef abs
#endif

libi77/rawio.h: 

comment out entire block:
#ifdef MSDOS
#include "io.h"
#define close _close
#define creat _creat
#define open _open
#define read _read
#define write _write
#endif


To build libf2c.a:

Easiest way is to go into the f2c/ directory and do:

ar r libf2c.a libf77/*.o libi77/*.o
ranlib libf2c.a

then copy libf2c.a into djgpp/lib
and copy f2c.h into djgpp/include