Fortran - Compiler Error

Author

Compiler Error

Bob Lang

2004-09-25, 8:57 pm

I am trying to compile a fortran program that consist of 48 separate
..for files (subroutines). My OS is Win98 and my compiler is Microsoft
Optimizing Compiler 5.0 and I am running it from the MS Dos Prompt. I
created .obj files with only a couple of minor errors. The problem
comes when I link the .obj files to create the exe. I am getting error
L1049 "too many segments". I tried increasing the segment size using
the /SE: option but this didn't help. Also, I am doing this for a
friend of mine and he told me that due
to the nature of the code it was necessary to save the local variables
during
compilation and too make sure this option was set or an infinite loop
is created. I have compiled much larger programs in the past and never
encountered
these problems before and haven't worked with fortran for about 10 or
15 years
so I hope someone can help me with the following 2 questions:

1. How can I correct the "too many segments" error?
2. By using the /4Ya, will this take care of the local variables
issue?
3. Do I need to use a different compiler?

Any help is appreciated.

Thanks,
-Bob

Ken Plotkin

2004-09-25, 8:57 pm

On 25 Sep 2004 15:13:33 -0700, bobandmell@yahoo.com (Bob Lang) wrote:

>1. How can I correct the "too many segments" error?

The way you've been doing it - with the SEG option. That will work up
to 16384, or until you run out of memory.

>2. By using the /4Ya, will this take care of the local variables
>issue?

I don't understand what your colleague is saying about an infinite
loop. If you need local variables to be saved, then you'd use the
SAVE command in each subroutine. But you don't need to do that with
MSF 5.x - it implicitly SAVEs by default.

Don't know anythig about 4Ya, other than the manual saying it's an
extension to support OS/2 multithreading. I wonder if invoking that
is causing the other problem.

>3. Do I need to use a different compiler?

If the executable is too big (bigger than 580 to 600 K - run "mem" at
the DOS prompt to see how much room you've got), or if you have any
HUGE arrays, I'd recommend getting a 32 bit compiler.

Ken Plotkin

Jan Vorbrüggen

2004-09-27, 3:57 am

> I am trying to compile a fortran program that consist of 48 separate
> ..for files (subroutines). My OS is Win98 and my compiler is Microsoft
> Optimizing Compiler 5.0

How old is that compiler now - twenty years? Even g77 very likely is a better
solution, for all of _its_ age.

Alternatively, get one of the free (for private use) F90 compilers, or buy
one (if for company use).

Jan

beliavsky@aol.com

2004-09-27, 9:06 am

=?ISO-8859-1?Q?Jan_Vorbr=FCggen?= <jvorbrueggen-not@mediasec.de> wrote:
>
>How old is that compiler now - twenty years? Even g77 very likely is a better
>solution, for all of _its_ age.

The OP should also consider OpenWatcom at http://www.openwatcom.org/product/features_content.html
, with associated newsgroup openwatcom.users.fortran .

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Ken Plotkin

2004-09-27, 4:01 pm

On Mon, 27 Sep 2004 09:14:35 +0200, Jan Vorbrüggen
<jvorbrueggen-not@mediasec.de> wrote:

>How old is that compiler now - twenty years? Even g77 very likely is a better
>solution, for all of _its_ age.

How old are any of us? ;-)

That's actually a very good compiler. I used it for years. IMHO,
there are just two issues with it. The first is that it's 16 bit DOS
oriented, so program size is limited. The second is that they never
did fix the 4Yb bug.

On the other hand, it has a lot of F90 features: allocatable arrays,
stuctures, enddo. Even some F2.03K features, like command line
arguments.

If his program is too big for it, though, he should definitely switch
to a newer 32 bit compiler.

Ken Plotkin

Bob Lang

2004-09-30, 2:57 am

Ken Plotkin <kplotkin@nospam-cox.net> wrote in message news:<cb5gl0lsik4kvousa634ad2f6ilt7lvql5@4ax.com>...
> On Mon, 27 Sep 2004 09:14:35 +0200, Jan Vorbrüggen
> <jvorbrueggen-not@mediasec.de> wrote:
>
>
>
> How old are any of us? ;-)
>
> That's actually a very good compiler. I used it for years. IMHO,
> there are just two issues with it. The first is that it's 16 bit DOS
> oriented, so program size is limited. The second is that they never
> did fix the 4Yb bug.
>
> On the other hand, it has a lot of F90 features: allocatable arrays,
> stuctures, enddo. Even some F2.03K features, like command line
> arguments.
>
> If his program is too big for it, though, he should definitely switch
> to a newer 32 bit compiler.
>
> Ken Plotkin

Ken,

I agree, this compiler did everything I needed it to do at the time.
I've sort of been out of Fortran for a long while now but am thinking
of upgrading some of my old programs. I will probably get a different
compiler soon. Also, thanks for your help with my original question
about the Segment Option. I did as you suggested and the program
compiled fine. I do have a couple of questions though:

1. Is there any way to know what segment size your program requires
before compiling?
2. You had indicated in your post that the maximum size was about
16384 or until you run out of memory but the manual says 3072. Is the
size addressed elsewhere in the manual?
3. I created the .exe by typing Link at the command line prompt and
added the + sign when necessary and just about ran out of room on the
command line. What do you need to do if there are too many .obj file
names to type out on the command line?

Thanks,
-Bob

Ken Plotkin

2004-09-30, 2:57 am

On 29 Sep 2004 19:06:06 -0700, bobandmell@yahoo.com (Bob Lang) wrote:

>1. Is there any way to know what segment size your program requires
>before compiling?

Not that I know of. The only time I had to use the seg command was
when linking with the PLOT88 library, and the docs for that said what
to do.

>2. You had indicated in your post that the maximum size was about
>16384 or until you run out of memory but the manual says 3072. Is the
>size addressed elsewhere in the manual?

My manual says 16384. Might be that I've got 5.1, and I think you
said you had 5.0.

>3. I created the .exe by typing Link at the command line prompt and
>added the + sign when necessary and just about ran out of room on the
>command line. What do you need to do if there are too many .obj file
>names to type out on the command line?

At last! One I can answer!! You use a response file. Make a file
with everything you need, breaking lines as necessary, and using a +
at the end of the broken lines. For example, if you have objects fee,
fie, foe, foo, you can make a file

fee fie foe +
foo

Call this "plugh", and you can then link via

link @plugh

Whatever you'd put on the command line (switches, library
specifications, etc.) can go into a response file.

Ken Plotkin

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