Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!think.com!samsung!munnari.oz.au!uniwa!DIALix!dent
From: dent@DIALix.oz.au (Andrew Dent)
Newsgroups: comp.lang.fortran
Subject: Re: Pseudo-FORTRAN -- f2c for the Macintosh
Message-ID: <1017@DIALix.oz.au>
Date: 1 Jun 91 10:52:11 GMT
References: <1991May30.040829.8696@eplrx7.uucp>
Organization: DIALix Services, Perth Western Australia
Lines: 36

In <1991May30.040829.8696@eplrx7.uucp> leipold@eplrx7.uucp (Walt Leipold) writes:

>I've used f2c, and it works fine -- at least, the generated C code compiles
>and runs on a Un*x system.  The C code also compiles under Think C on the
>Macintosh, but it won't link without f2c's 'standard' libraries, libF77 and
>libI77.  Can anyone out there who has ported these libraries to the Mac
>give me some hints?  *Has* anyone used f2c to generate code for the Mac?  I 
>don't want to run f2c on a Mac; I just want to run the C code it generates.

I'd be very interested to hear if f2c generates successful code for the
Mac as I've spent most of the past 3 months writing a converter from FORTRAN to
THINK Pascal. The biggest problem I encountered is the way the Mac stores
integers, which causes major problems with arrays of different cell sizes
being EQUIVALENCED.

eg: INTEGER*2 little(2)
    INTEGER*4 big
     EQUIVALENCE (little,big)
    little(1) = 10
    little(2) = 99

on VMS & MS-DOS, big would now have the value 6488074
on Mac: 655459 because the bytes are stored in the opposite order to all
FORTRAN implementations.

I think that MacFORTRAN has the same problem (without trying to fix it) 
which means people porting code to the Mac will have a nasty time of it
(the stuff I'm translating has algorithms that use overlaid 4 & 2 byte
integers all the time, AND the actual binary representations are important:-(

BTW - IS there an equivalent of f2c around, for Pascal?

Andy Dent                     A.D. Software phone 09 249 2719
Mac & VAX programmer          94 Bermuda Dve, Ballajura
dent@DIALix.oz                Western Australia  6066     
dent@DIALix.oz.au (international)