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Re: Proposal to remove support for MachTen
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From:
Dominic Dunlop
Date:
February 15, 2004 14:23
Subject:
Re: Proposal to remove support for MachTen
Message ID:
F457668B-5FC8-11D8-A47A-000A27839BD6@mac.com
On 11 Feb 2004, at 21:31, Andrew Dougherty wrote:
> On Wed, 11 Feb 2004, H.Merijn Brand wrote:
>
>> On Wed 11 Feb 2004 15:54, Dominic Dunlop <shouldbedomo@mac.com> wrote:
>
> [ giving up on MachTen ]
>
>> I propose the following:
>>
>> 1. Leave Configure as it is, this also to simplify integration
>> to older versions, as Configure is still shared amongst all
OK. Untouched.
>
> Yes, but certainly do put some comments in the appropriate unit
> (OldConfig.U, I think, offhand.)
That's up to you.
>
>> 2. Make hints/machten.sh exit with a warning for any perl
>> higher than 5.8.x. This exit will have the same effect as
>> you intended with the change to Configure: it won't build
>
> Or maybe don't even bother, though certainly remove or reword
> Dominic's promise to help fix any problems!
>
> After all, there's a difference between not supporting something and
> going out of our way to un-support it.
Done. See patch below for hints/machten.sh and README.machten. It
applies against perl-current and 5.6.3. I have not checked any other
distributions.
--- hints/machten.sh~ Wed Dec 11 10:23:25 2002
+++ hints/machten.sh Sun Feb 15 14:45:45 2004
@@ -1,7 +1,14 @@
#! /bin/bash
# machten.sh
# This is for MachTen 4.1.4. It might work on other versions and
variants
-# too. If it doesn't, tell me, and I'll try to fix it --
domo@computer.org
+# too. MachTen is now obsolete, lacks many features expected in
modern UNIX
+# implementations, and suffers from a number of bugs which are likely
never
+# to be fixed. This means that, in the absence of extensive work on
+# this file and on the perl source code, versions of perl later than
5.6.x
+# cannot successfully be built on MachTen. This file enforces this
+# restriction. Should you wish to port a later version of perl to
MachTen,
+# feel free to contact me for pointers.
+# -- Dominic Dunlop <domo@computer.org> 040213
#
# Users of earlier MachTen versions might need a fixed tr from
ftp.tenon.com.
# This should be described in the MachTen release notes.
@@ -15,6 +22,8 @@
# Martijn Koster <m.koster@webcrawler.com>
# Richard Yeh <rcyeh@cco.caltech.edu>
#
+# Prevent building of perls later than 5.6.x, stating why -- see above.
+# -- Dominic Dunlop <domo@computer.org> 040213
# Deny system's false claims to support mmap() and munmap(); note
# also that Sys V IPC (re)disabled by jhi due to continuing inadequacy
# -- Dominic Dunlop <domo@computer.org> 001111
@@ -44,8 +53,21 @@
# Do not use perl's malloc; SysV IPC OK -- Neil Cutcliffe, Tenon 961030
# File::Find's use of link count disabled by Dominic Dunlop 960528
# Perl's use of sigsetjmp etc. disabled by Dominic Dunlop 960521
-#
-# Comments, questions, and improvements welcome!
+
+# Assume that PERL_REVISON in patchlevel.h is 5.
+# Should you want to try building perl-5.8.x or later, set
PERL_VERSION_SAFE_MAX
+# appropriately in your environment before running Configure.
+if [ `awk '$1=="#define" && $2=="PERL_VERSION"{print $3}'
patchlevel.h` \
+ -gt ${PERL_VERSION_SAFE_MAX:-6} ]
+then
+ cat <<EOF >&4
+
+Perl versions greater than 5.6.x have not been ported to MachTen. If
you
+wish to build a version from the 5.6 track, please see the notes in
+F<README.machten>
+EOF
+ exit 1
+fi
#
# MachTen 4.1.1's support for shadow password file access is
incomplete:
# disable its use completely.
@@ -95,7 +117,7 @@
# Specify a high level of optimization (-O3 wouldn't do much more)
optimize=${optimize:--O2 -fomit-frame-pointer}
-# Make symbol table listings les voluminous
+# Make symbol table listings less voluminous
nmopts=-gp
# Set reg_infty -- the maximum allowable number of repeats in regular
--- README.machten~ Wed Jun 6 23:46:22 2001
+++ README.machten Fri Feb 13 19:36:03 2004
@@ -11,9 +11,36 @@
This document describes how to build Perl 5 on Power MachTen systems,
and discusses a few wrinkles in the implementation.
-=head2 Compiling Perl 5 on MachTen
+=head2 Perl version 5.8.x and greater not supported
-To compile perl under MachTen 4.1.4 (and probably earlier versions):
+B<Power MachTen is not supported by versions of Perl later than
+5.6.x.>
+If you wish to build a version from the 5.6 track, please
+obtain a source distribution from the archive at
+L<http://cpan.org/src/5.0/> and follow the instructions in its
+README.machten file.
+
+MachTen is no longer supported by its developers, Tenon Intersystems.
+A UNIX environment hosted on Mac OS Classic, MachTen has been
+superseded by Mac OS X and by BSD and Linux implementations for
Macintosh
+hardware.
+The final version of Power MachTen, 4.1.4, lacks many features found in
+modern implementations of UNIX, and has a number of bugs.
+These shortcomings prevent recent versions of Perl from being able to
use
+extensions on MachTen, and cause numerous test suite failures in the
+perl core.
+
+In September 2003, a discussion on the MachTen mailing list determined
+that there was no interest in making a later version of Perl build
+successfully on MachTen.
+Consequently, support for building Perl under MachTen has been
suppressed
+in Perl distributions published after February 2004.
+The hints file, F<hints/machten.sh>, remains a part of the
+distributions for reference purposes.
+
+=head2 Compiling Perl 5.6.x on MachTen
+
+To compile perl 5.6.x under MachTen 4.1.4 (and probably earlier
versions):
./Configure -de
make
@@ -86,4 +113,4 @@
=head1 DATE
-Version 1.0.1 2000-03-27
+Version 1.1.0 2004-02-13
--
Dominic Dunlop
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