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Date:      Sat, 02 Nov 2002 12:06:38 -0800
From:      Peter Wemm <peter@wemm.org>
To:        Steve Kargl <sgk@troutmask.apl.washington.edu>
Cc:        Mark Murray <mark@grondar.org>, freebsd-current@FreeBSD.ORG
Subject:   Re: __sF 
Message-ID:  <20021102200638.3F3F62A88D@canning.wemm.org>
In-Reply-To: <20021102192432.GC28971@troutmask.apl.washington.edu> 

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Steve Kargl wrote:
> On Sat, Nov 02, 2002 at 07:06:47PM +0000, Mark Murray wrote:
> > > I seriously doubt that NAG will support both a 
> > > 4.x and 5.x version of their compiler.
> > 
> > This shouldn't be a problem. The commercial software Should Not Be(tm)
> > supporting something as variable as CURRENT, and with the STABLE libraries
> > around in COMPAT mode, the compiler Will Just Work(tm) (or should with
> > not much effort).
> > 
> > By the time __sF is mainstream, I guess the vendor will have adapted
> > their product to match. Win, win.
> > 
> 
> No, it does not just work.  The NAG f95 compiler generates a
> C file.  The C file is compiled by gcc.
> 
> f95 -o a a.f90 
> 
> is equivalent to 
> 
> f95 -c -o a.c a.f90
> gcc -o a a.c -lf96 -lm -lc
> 
> libf96.so is linked against libc.so, which is a symlink
> to libc.so.4 on a 4.x system.  libm.so and libc.so are
> symlinks that point to libm.so.2 and libc.so.5 on 5.x.
> You pick up the wrong libc.so in the above line.

This is also solveable by setting a strategic symlink from libc.so ->
/usr/lib/compat/libc.so.4 in the f95 backend's search path.

Does it do a "gcc -o a a.c -L /usr/local/lib/f95 -lf96 -lm -lc" or something
like that?  If so, you can put the libc.so symlink in there.

I assume that the generated code doesn't contain #includes...  If it does
you'll also need to do something about that so that you get the right
#includes.  libf96.so is a 4.x binary.  Even if it wasn't for __sF, you
should be compiling with 4.x libraries and (if needed) 4.x headers, because
you have parts of the 4.x stdio.h embedded in libf96.so.

Cheers,
-Peter
--
Peter Wemm - peter@wemm.org; peter@FreeBSD.org; peter@yahoo-inc.com
"All of this is for nothing if we don't go to the stars" - JMS/B5


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