Re: F77 code under gcc

Re: F77 code under gcc

[Alex Tzanov]

Dear Sir


I am redirected my question to you following the advise by gcc developer.

From your site:

http://gcc.gnu.org/gcc-4.0/changes.html#4.0.2

Fortran

    * A new Fortran front end has replaced the aging GNU Fortran 77 front end. The new front
end supports Fortran 90 and Fortran 95. It may not yet be as stable as the old Fortran front
end.

So shall I understand no support for F77 at all? Or there are options for F77 dialect?
Novell site claims support for F77, but seems to me that is not true.


Richard Guenther wrote:

> On 11/4/05, Alex Tzanov <alex.tzanov@nyu.edu> wrote:
> > Dear developers,
> >
> >
> > I have recently upgraded my PC to Suse Linux 10 (from 9.3). The
> > distribution
> > comes with gcc 4.0.2. The problem that arrised after the upgrade is that
> > I
> > cannot compile f77 codes anymore. More precisely when I try to compile a
> >
> > Fortran file (*.f) I am getting the error:
> >
> > "gcc: installation problem, cannot exec 'f951': No such file or
> > directory
>
> First of all, you should report installation problems of vendor packages
> to the vendor, i.e. SUSE or NOVELL in this case.  Second, this list
> is for development _of_ gcc, not with, for such kind of questions please
> refer to gcc-help@gcc.gnu.org.
>
> You are probably missing an installed rpm, like gcc-fortran or whatever
> it is called.
>
> Thanks,
> Richard.
>
> >
> >
> > This is rather confusing since Novell claims that the provided rpm
> >
> > has been created with support of F77. Assuming the problem could come from
> >
> > formated input I tried
> >
> > -ffree-form
> >
> > -x f77
> >
> > but nothing works. Do you have any clue about that? How I can compile F77 code or should I
> >
> > downgrade to gcc 2.95 or 3.0.x?
> >
> > Thank you
> >
> > Alexander
> >
> > --
> > Alexander Tzanov
> > Scientific Computing and Visualization
> > New York University, WWH
> > 251 Mercer Street
> > phone: 212 998 3159
> > fax:   212 995 4120
> > e-mail: alex.tzanov@nyu.edu
> >
> >
> >
> >

--
Alexander Tzanov
Scientific Computing and Visualization
New York University, WWH
251 Mercer Street
phone: 212 998 3159
fax:   212 995 4120
e-mail: alex.tzanov@nyu.edu

Re: F77 code under gcc

[Andrew Pinski]

> 
> Dear Sir
> 
> 
> I am redirected my question to you following the advise by gcc developer.
> 
> >From your site:
> 
> http://gcc.gnu.org/gcc-4.0/changes.html#4.0.2
> 
> Fortran
> 
>     * A new Fortran front end has replaced the aging GNU Fortran 77 front end. The new front
> end supports Fortran 90 and Fortran 95. It may not yet be as stable as the old Fortran front
> end.
> 
> So shall I understand no support for F77 at all? Or there are options for F77 dialect?
> Novell site claims support for F77, but seems to me that is not true.

No, the issue is that you don't have the fortran front-end installed.  It does support
fortran 77 to some extend (since all legal fortran 77 is also legal fortran 90).

You might need to install the package that contains the fortran front-end.

-- Pinski

Re: F77 code under gcc

[Steve Kargl]

On Fri, Nov 04, 2005 at 10:57:45AM -0500, Alex Tzanov wrote:
> 
> 
> I am redirected my question to you following the advise by gcc developer.
> 
> >From your site:
> 
> http://gcc.gnu.org/gcc-4.0/changes.html#4.0.2
> 
> Fortran
> 
>     * A new Fortran front end has replaced the aging GNU Fortran
> 77 front end. The new front end supports Fortran 90 and Fortran 95.
> It may not yet be as stable as the old Fortran front end.
> 
> So shall I understand no support for F77 at all?

Fortran 77 is a proper subset of Fortran 90.  So, if you have
standard conforming Fortran 77 gfortran will compile the code.
If your code could be compiled by g77, it can probably be
compiled with gfortran (unless you use some of g77's extension
that are yet to be implemented).

> Or there are options for F77 dialect?

gfortran some.f             <- You probably want this one.
gfortran -std=f77 some.f    <- You could try this, but it is fairly strict.
gfortran -std=f95 some.f90  <- You probably want to move to using Fortran 95.


> Novell site claims support for F77, but seems to me that is not true.
> 
> > > I have recently upgraded my PC to Suse Linux 10 (from 9.3). The
> > > distribution  comes with gcc 4.0.2.

% find /usr -name gfortran
% find /use -name f951

If these commands find no files, then complain to Novell.

-- 
Steve

Re: F77 code under gcc

[Tobias.Schlueter]

Quoting Alex Tzanov <alex.tzanov@nyu.edu>:
> Fortran
>
>     * A new Fortran front end has replaced the aging GNU Fortran 77 front
> end. The new front
> end supports Fortran 90 and Fortran 95. It may not yet be as stable as the
> old Fortran front
> end.
>
> So shall I understand no support for F77 at all? Or there are options for F77
> dialect?
> Novell site claims support for F77, but seems to me that is not true.

Fortran 77 is a  subset of Fortran 90, in other words, every valid Fortran 77
program is a valid Fortran 90 program.

For the rest of your question, I agree with Richard Guenther: your problem is an
installation problem, which is something your system vendor (i.e. SuSE/Novell)
can probably solve.  I assume that the system upgrade wasn't smart enough to
understand that it should replace g77 by gfortran, maybe looking around for a
package named 'gfortran-something' will get you further.

Regards,
- Tobi

Re: F77 code under gcc

[Richard E Maine]

On Nov 4, 2005, at 7:57 AM, Alex Tzanov wrote:

> So shall I understand no support for F77 at all? Or there are options 
> for F77 dialect?
> Novell site claims support for F77, but seems to me that is not true.

F77 is a subset of f90. Therefore *ALL* f90 compilers support f77, by 
definition. No special option is needed. If the code in question uses 
features that were not standard Fortran of any version, then that's a 
different matter. Nonstandard code sometimes has problems when ported 
to different compilers. That's exactly why the standard exists. The 
question of nonstandard code has nothing in particular to do with f77 
vs f90.

However, from a quick glance at your reported symptoms, this doesn't 
sound like it has anything to do with f77, f90, compiler switches, or 
anything along those lines. The compiler does not appear to be properly 
installed at all. Note that's what the message says, with "gcc: 
installation problem". The next part of the message, "cannot exec 
'f951': No such file or directory" indicates that part of the compiler 
can't be found. In fact, if I recall correctly, that would be pretty 
much the main part of the compiler.

I don't have enough information to figure out how it got in that state, 
but what you have is clearly a problem with getting the compiler 
installed. Fiddling with options won't change that. I think Richard 
Guenther already gave you the basic answer. It doesn't look like you 
actually have the gfortran compiler installed at all. I don't have a 
copy of SuSE 10 handy to check.

I note that you cited Novell as claiming that the rpm was created with 
support for f77. I don't know exactly what that means (and I don't know 
exactly what they said), but that doesn't explicitly say that they 
include gfortran. It could mean any of several things. It could mean 
that they include gfortran - but your evidence seems to be arguing 
against it. It could mean that they include a driver that supports 
gfortran, but that you also have to install another rpm to complete it. 
(That actually seems quite plausible from the symptoms - perhaps the 
most likely case). It could mean that they supply a g77. Alternatively, 
it could be out-of-date in that an earlier version included g77 and 
they failed to update their documentation.

On thinking about it, the symptoms really sound a lot like there is an 
additional rpm that you need. Not having a copy of SuSe 10 handy (I've 
got some 9.x copies, but no 10), I can't diagnose further than that. 
But if that's the case, it is far more a question of SuSe's particular 
packaging choices than anything about the compiler.

-- 
Richard Maine                |  Good judgment comes from experience;
Richard.Maine@nasa.gov       |  experience comes from bad judgment.
                             |        -- Mark Twain

Re: F77 code under gcc

[Manfred Schwarb]

> --- Ursprüngliche Nachricht ---
> Von: Alex Tzanov <alex.tzanov@nyu.edu>
> An: fortran@gcc.gnu.org, gcc-help@gcc.gnu.org
> Betreff: Re: F77 code under gcc
> Datum: Fri, 04 Nov 2005 10:57:45 -0500
> 
> Dear Sir
> 
> 
> I am redirected my question to you following the advise by gcc developer.
> 
> >From your site:
> 
> http://gcc.gnu.org/gcc-4.0/changes.html#4.0.2
> 
> Fortran
> 
>     * A new Fortran front end has replaced the aging GNU Fortran 77 front
> end. The new front
> end supports Fortran 90 and Fortran 95. It may not yet be as stable as the
> old Fortran front
> end.
> 
> So shall I understand no support for F77 at all? Or there are options for
> F77 dialect?
> Novell site claims support for F77, but seems to me that is not true.
> 
> 
> Richard Guenther wrote:
> 
> > On 11/4/05, Alex Tzanov <alex.tzanov@nyu.edu> wrote:
> > > Dear developers,
> > >
> > >
> > > I have recently upgraded my PC to Suse Linux 10 (from 9.3). The
> > > distribution
> > > comes with gcc 4.0.2. The problem that arrised after the upgrade is
> that
> > > I
> > > cannot compile f77 codes anymore. More precisely when I try to compile
> a
> > >
> > > Fortran file (*.f) I am getting the error:
> > >
> > > "gcc: installation problem, cannot exec 'f951': No such file or
> > > directory
> >
> > First of all, you should report installation problems of vendor packages
> > to the vendor, i.e. SUSE or NOVELL in this case.  Second, this list
> > is for development _of_ gcc, not with, for such kind of questions please
> > refer to gcc-help@gcc.gnu.org.
> >
> > You are probably missing an installed rpm, like gcc-fortran or whatever
> > it is called.
> >
> > Thanks,
> > Richard.
> >


This is due to sh***y packaging of SUSE.
The package gcc-fortran is not on the 5-CD-version, only on
the DVD-version. The notice, that CD-version and DVD-version are
not identical is hidden quite well.

But you can find it
at

http://ftp.opensuse.org/pub/opensuse/distribution/SL-10.0-OSS/inst-source/suse/i586/gcc-fortran-4.0.2_20050901-3.i586.rpm


As gfortran is evolving fast, I'd recommend using a never version,
e.g. http://quatramaran.ens.fr/~coudert/gfortran/gfortran-linux.tar.gz



> > > phone: 212 998 3159
> > > fax:   212 995 4120
> > > e-mail: alex.tzanov@nyu.edu
> > >
> > >
> > >
> > >
> 
> --
> Alexander Tzanov
> Scientific Computing and Visualization
> New York University, WWH
> 251 Mercer Street
> phone: 212 998 3159
> fax:   212 995 4120
> e-mail: alex.tzanov@nyu.edu
> 
> 
>

-- 
Lust, ein paar Euro nebenbei zu verdienen? Ohne Kosten, ohne Risiko!
Satte Provisionen für GMX Partner: http://www.gmx.net/de/go/partner

Re: F77 code under gcc

[Steven Bosscher]

On Friday 04 November 2005 16:57, Alex Tzanov wrote:
> Dear Sir
> So shall I understand no support for F77 at all? Or there are options for
> F77 dialect? Novell site claims support for F77, but seems to me that is
> not true.

That is because you don't understand what is going on here.

First of all, F95 with GNU extensions is a superset of F77, so a good
F95 compiler can compile your F77 code.  What comes with GCC 4.0 is
not really a good compiler btw, it is highly experimental -- use at
your own risk.

Second, you don't even have gfortran installed.  Install the package
named gcc-fortran.rpm.

Note that this list is totally inappropriate for the questions you're
asking.  I think it is quite rude that even though the appropriate
list to ask questions was pointed out to you, you still simply re-ask
your question somewhere else.  That kind of behavior makes me less
willing to help you.

Gr.
Steven

Re: F77 code under gcc

[Jerry DeLisle]

Hi all,

I may have missed something in this thread, but it does seem that the question 
about F77 code with gfortran keeps popping up.  I think we need to revise the 
documentation to explain the fact that f77 code is a subset of f90 and that it 
is supported by gfortran completely, although we encourage people to move on 
into f90/95 capabilities.

If no one else is already updating the documentation about this, I will take a 
crack at it in the next week or so.

Jerry

Re: F77 code under gcc

[Brian T. Brunner]

I would recommend to the package-wrapper folks to put a sym link named f77 alongside f90 & f95 & gfortran.

Brian Brunner
brian.t.brunner@gai-tronics.com
(610)796-5838

>>> Jerry DeLisle <jvdelisle@verizon.net> 11/04/05 01:31PM >>>
Hi all,

I may have missed something in this thread, but it does seem that the question 
about F77 code with gfortran keeps popping up.  I think we need to revise the 
documentation to explain the fact that f77 code is a subset of f90 and that it 
is supported by gfortran completely, although we encourage people to move on 
into f90/95 capabilities.

If no one else is already updating the documentation about this, I will take a 
crack at it in the next week or so.

Jerry

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Re: F77 code under gcc

[Nelson H. F. Beebe]

Brian T. Brunner <brian.t.brunner@gai-tronics.com> writes on 
Fri, 04 Nov 2005 10:45:51 -0800:

>> I would recommend to the package-wrapper folks to put a sym link
>> named f77 alongside f90 & f95 & gfortran.

Please do NOT do that.  The gcc family runs on many different
operating systems where there are already vendor-provided compilers
named f77, f90, and f95.  Historically, the GNU compilers have had
names like gcc, g++, g77, gpc, gnat, gfortran, ..., avoiding name
collisions with compiler products from other suppliers.  It is
generally only in the GNU/Linux and BSD worlds that the GNU compilers
have also been installed in /usr/bin under the names cc and f77.

Let's keep distinctive names for the GNU compilers.

-------------------------------------------------------------------------------
- Nelson H. F. Beebe                    Tel: +1 801 581 5254                  -
- University of Utah                    FAX: +1 801 581 4148                  -
- Department of Mathematics, 110 LCB    Internet e-mail: beebe@math.utah.edu  -
- 155 S 1400 E RM 233                       beebe@acm.org  beebe@computer.org -
- Salt Lake City, UT 84112-0090, USA    URL: http://www.math.utah.edu/~beebe  -
-------------------------------------------------------------------------------

Re: F77 code under gcc

[Brian T. Brunner]

My error: g77, g90, g95... the point being that if the new compiler 
is a true superset of the old (this is not true for gcc v3.4 which is not 
a true superset of gcc 2.97) then simple name links give everybody 
what they want and need.

Brian Brunner
brian.t.brunner@gai-tronics.com
(610)796-5838

>>> "Nelson H. F. Beebe" <beebe@math.utah.edu> 11/04/05 02:16PM >>>
Brian T. Brunner <brian.t.brunner@gai-tronics.com> writes on 
Fri, 04 Nov 2005 10:45:51 -0800:

>> I would recommend to the package-wrapper folks to put a sym link
>> named f77 alongside f90 & f95 & gfortran.

Please do NOT do that.  The gcc family runs on many different
operating systems where there are already vendor-provided compilers
named f77, f90, and f95.  Historically, the GNU compilers have had
names like gcc, g++, g77, gpc, gnat, gfortran, ..., avoiding name
collisions with compiler products from other suppliers.  It is
generally only in the GNU/Linux and BSD worlds that the GNU compilers
have also been installed in /usr/bin under the names cc and f77.

Let's keep distinctive names for the GNU compilers.

-------------------------------------------------------------------------------
- Nelson H. F. Beebe                    Tel: +1 801 581 5254                  -
- University of Utah                    FAX: +1 801 581 4148                  -
- Department of Mathematics, 110 LCB    Internet e-mail: beebe@math.utah.edu  -
- 155 S 1400 E RM 233                       beebe@acm.org  beebe@computer.org -
- Salt Lake City, UT 84112-0090, USA    URL: http://www.math.utah.edu/~beebe  -
-------------------------------------------------------------------------------

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This email and any files transmitted with it are confidential and
intended solely for the use of the individual or entity to whom they
are addressed. If you have received this email in error please notify
the system manager.

This footnote also confirms that this email message has been swept
for the presence of computer viruses.

www.hubbell.com - Hubbell Incorporated

Re: F77 code under gcc

[Steve Kargl]

On Fri, Nov 04, 2005 at 11:54:12AM -0800, Brian T. Brunner wrote:
> 
> My error: g77, g90, g95... the point being that if the new compiler 
> is a true superset of the old (this is not true for gcc v3.4 which is not 
> a true superset of gcc 2.97) then simple name links give everybody 
> what they want and need.
> 

gfortran does not implement all of the horrible hacks and
compiler flags found in g77, so a symlink of g77 pointing
at gfortran is inappropriate.   That being said, I've found
very few Fortran 77 (with some extensions) packages that
gfortran can not compile.

-- 
Steve