From: Eric Backus <ericb AT lsid DOT hp DOT com>
Subject: Re: RCS and DJGCC
To: cmb AT epcc DOT ed DOT ac DOT uk
Date: Fri, 5 Feb 93 10:04:17 PST
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu
Mailer: Elm [revision: 66.25]

> > Subject: DOS/GCC port of RCS 5.6.4 beta
> > To: rcs-bugs AT cs DOT purdue DOT edu
> > 
> > I have made what appears to be a successful port of RCS 5.6.4 beta
> > (plus MSDOS files) to DOS using DJ Delorie's port of GCC. 
> > 
> > Took the 'rcs-5.6.4-beta.tar.Z' and 'msrcs-1.8-beta.tar.Z' files from
> > ftp.cs.purdue.edu in pub/hammer. Modified the Unix 'Makefile' and the
> > MS-DOS conf.h. Copied the logindos.c, getcwdsl.c and *.rsp files from
> > the 'ms' directory. Compiled and it appears to work fine.
> > 
> > I have the DOS ports of the fileutils (ls, rm, etc.), and 'gnumake',
> > as well as a /bin/sh clone, which made using the Unix Makefile much
> > easier. System is a 386-40MHz, 4Mbyte RAM, 105Mbyte hard disk (IDE),
> > MS-DOS 5. No guarantees on the quality of the port at the moment -
> > getting the 'rcsvers.c' rules to work OK was a pain, and I don't think
> > it is right yet (limitations in the /bin/sh clone, that I then tried
> > to work round). Also, gnumake didn't seem to have its default rules
> > mechanism working, so there are a lot of new rules at the end to build
> > the .o files. I have also not been clean in using $x, $o extensions in
> > the makefile and *.rsp files...


Unfortunately, GNUish make doesn't know that ".o" is a valid suffix.
You need to add this line to your "DJGPP/GNUish Make" makefile:

.SUFFIXES:	.o

In addition, if there is no ".c.o:" target specified in the makefile,
you need to add one, like this:

.c.o:
	$(CC) $(CFLAGS) -c $<

After you make these two changes, GNUish make should get all the
default rules correct.


> > I had to comment out a number of things in the conf.h since they
> > clashed with the definitions the gcc header files gave me. Note that I
> > do not have the current version of DJGPP - I have 1.04 or so, and the
> > current one is 1.09. DJGPP 1.04 is either a gcc 2.1x or 2.2x port. I
> > simply iterated until I got a totally clean compile.


You REALLY should update your system to 1.09.  There have been a LOT
of fixes to libc.a, which make it act a LOT more like a UNIX system.
It would make your port much cleaner, much easier to do, and much more
likely to work correctly.

Plus, the rest of us with 1.09 would feel a lot more confident using
your port if you were up-to-date.
--
				Eric Backus
				ericb AT lsid DOT hp DOT com
				(206) 335-2495