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From: wyatt@cfa.UUCP (Bill Wyatt)
Newsgroups: net.lang.f77
Subject: Re: Re: Looking for a good Unix FORTRAN
Message-ID: <178@cfa.UUCP>
Date: Fri, 31-Jan-86 14:52:02 EST
Article-I.D.: cfa.178
Posted: Fri Jan 31 14:52:02 1986
Date-Received: Sat, 1-Feb-86 21:52:42 EST
References: <961@wdl1.UUCP> <705@ttrdc.UUCP>
Organization: Harvard-Smithsonian Center for Astrophysics
Lines: 35

> In article <961@wdl1.UUCP>, sml@wdl1.UUCP writes:
> >The VMS Fortran compiler has been ported to Ultrix by Dec.  You now have
> >the SAME Fortran available on both VMS and Ultrix.
> >
> I have seen a number of postings alluding to this port (which if true,
> is wonderful).  Could someone out there who has actually USED this
> beast (on Ultrix) comment on whether its performance is really the equal
> of the VMS?  In crunch mode I would imagine it would be, but doesn't its
> I/O have to go through the usual Unix mechanisms, that is, write() and
> read(), as well as the Unix idiosyncracies of its filesystem, with the
> (possible) degradation of performance or loss of features?  For example,
> [ ... ] 
>       open(unit=1,file='foobar.dat',form='unformatted',recl=80,
>      +     access='direct',status='old')
> 
> for instance?  Does it look like the same way the old f77 did such things?
> Would binaries written by the 'old' f77 be readable by the 'new' without
> any internal structure to the file?  Or are headers prepended to binary
> files as was so strongly pushed a few months ago here on the net by some
> guy from DEC?  Also carriage control. [ ... ]

VAX Fortran is available only under Ultrix 1.2 (and later), which isn't
announced yet. Since 1.2 f77 has many, perhaps all of the bsd 4.3 f77
performance enhancements, I suspect the VAX Fortran will run very fast.

The example cited above is standard f77 format, and since VAX Fortran is a
superset of f77, the statement is the same. I would not expect the object
modules to be compatible, but they are compatible with other languages, DBX, 
and AR.

Sorry, but I don't know about carriage control issues.
-- 

Bill    UUCP:  {seismo|ihnp4|cmcl2}!harvard!talcott!cfa!wyatt
Wyatt   ARPA:  wyatt%cfa.UUCP@harvard.HARVARD.EDU