Re: ancient PL/I, was fledgling assembler programmer

From	gah4 <gah4@u.washington.edu>
Newsgroups	comp.compilers
Subject	Re: ancient PL/I, was fledgling assembler programmer
Date	2023-03-24 22:44 -0700
Organization	Compilers Central
Message-ID	<23-03-014@comp.compilers> (permalink)
References	(2 earlier) <23-03-003@comp.compilers> <23-03-007@comp.compilers> <23-03-008@comp.compilers> <23-03-012@comp.compilers> <23-03-013@comp.compilers>

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On Friday, March 24, 2023 at 9:13:05 PM UTC-7, Dennis Boone wrote:

(after I wrote)
> > OK, the IBM PL/I (F) compiler, for what many consider a bloated
> > language, is designed to run (maybe not well) in 64K.
> > At the end of every compilation it tells how much memory was
> > used, how much available, and how much to keep the symbol table
> > in memory.

> It's... 30-some passes, iirc?

> [Well, phases or overlays but yes, IBM was really good at slicing compilers
> into pieces they could overlay. -John]

It is what IBM calls, I believe, dynamic overlay.  Each module specifically
requests others to be loaded into memory.  If there is enough memory,
they can stay, otherwise they are removed.

And there are a few disk files to be used, when it is actually
a separate pass.  The only one I actually know, is if the preprocessor
is used, it writes a disk file with the preprocessor output.

And as noted, if it is really short on memory, the symbol table
goes out to disk.

Fortran H, on the other hand, uses the overlay system generated
by the linkage editor.  When running on virtual storage system, it is
usual to run the compiler through the linkage editor to remove
the overlay structure.  (One of the few linkers that knows how
to read its own output.)  Normally it is about 300K, without
overlay closer to 450K.
[Never heard of dynamic overlays on S/360. -John]

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fledgling assembler programmer Alan.Beck@darkrealms.ca (Alan Beck) - 2023-03-21 17:40 -0400
  Re: fledgling assembler programmer gah4 <gah4@u.washington.edu> - 2023-03-21 17:23 -0700
    Re: fledgling assembler programmer Thomas Koenig <tkoenig@netcologne.de> - 2023-03-22 06:49 +0000
      Re: fledgling assembler programmer gah4 <gah4@u.washington.edu> - 2023-03-22 13:31 -0700
        Re: fledgling assembler programmer Thomas Koenig <tkoenig@netcologne.de> - 2023-03-23 11:26 +0000
          Re: fledgling assembler programmer gah4 <gah4@u.washington.edu> - 2023-03-24 14:17 -0700
            Re: ancient PL/I, was fledgling assembler programmer drb@ihatespam.msu.edu (Dennis Boone) - 2023-03-24 22:51 +0000
              Re: ancient PL/I, was fledgling assembler programmer gah4 <gah4@u.washington.edu> - 2023-03-24 22:44 -0700
                Re: ancient PL/I, was fledgling assembler programmer gah4 <gah4@u.washington.edu> - 2023-03-25 01:27 -0700
            Re: fledgling assembler programmer Hans-Peter Diettrich <DrDiettrich1@netscape.net> - 2023-03-25 13:07 +0100
              Re: fledgling assembler programmer George Neuner <gneuner2@comcast.net> - 2023-03-25 20:54 -0400
                Portable Software (was: fledgling assembler programmer) Hans-Peter Diettrich <DrDiettrich1@netscape.net> - 2023-03-28 09:21 +0200
                Re: Portable Software (was: fledgling assembler programmer) arnold@freefriends.org (Aharon Robbins) - 2023-03-28 14:42 +0000
                Re: configuguration tools, Portable Software (was: fledgling assembler programmer) Kaz Kylheku <864-117-4973@kylheku.com> - 2023-03-29 18:33 +0000
                Re: configuguration tools, Portable Software (was: fledgling assembler programmer) arnold@skeeve.com (Aharon Robbins) - 2023-03-31 07:10 +0000
                Re: configuguration tools, Portable Software (was: fledgling assembler programmer) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2023-04-02 08:56 +0000
                Re: Portable Software Hans-Peter Diettrich <DrDiettrich1@netscape.net> - 2023-03-31 07:49 +0200
                Re: Portable Software anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2023-04-02 10:04 +0000
                Re: Portable Software Hans-Peter Diettrich <DrDiettrich1@netscape.net> - 2023-04-05 11:23 +0200
                Re: Portable Software anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2023-04-05 16:30 +0000
                Re: Portable Software Kaz Kylheku <864-117-4973@kylheku.com> - 2023-04-06 08:35 +0000
                Re: Portable Software Hans-Peter Diettrich <DrDiettrich1@netscape.net> - 2023-04-07 15:35 +0200
                Re: Portable Software Thomas Koenig <tkoenig@netcologne.de> - 2023-04-08 18:25 +0000
                Re: Portable Software (was: fledgling assembler programmer) gah4 <gah4@u.washington.edu> - 2023-03-28 14:21 -0700
                Re: Portable Software (was: fledgling assembler programmer) Kaz Kylheku <864-117-4973@kylheku.com> - 2023-03-29 18:34 +0000
                Re: Portable Software (was: fledgling assembler programmer) George Neuner <gneuner2@comcast.net> - 2023-03-28 17:26 -0400
                Re: Portable python Software (was: fledgling assembler programmer) George Neuner <gneuner2@comcast.net> - 2023-03-29 13:50 -0400
                Re: Portable Software (was: fledgling assembler programmer) gah4 <gah4@u.washington.edu> - 2023-03-29 11:27 -0700
                Re: Portable Software (was: fledgling assembler programmer) Thomas Koenig <tkoenig@netcologne.de> - 2023-03-31 05:19 +0000
                Re: Portable Software (was: fledgling assembler programmer) gah4 <gah4@u.washington.edu> - 2023-03-31 12:41 -0700
                Re: Portable Software (was: fledgling assembler programmer) anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2023-03-31 16:34 +0000
      Re: fledgling assembler programmer arnold@skeeve.com (Aharon Robbins) - 2023-03-23 13:56 +0000
    Re: fledgling assembler programmer anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2023-03-22 10:02 +0000
  Re: fledgling assembler programmer David Brown <david.brown@hesbynett.no> - 2023-03-22 14:39 +0100
  Re: fledgling assembler programmer George Neuner <gneuner2@comcast.net> - 2023-03-22 14:54 -0400

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