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1If you read this file _as_is_, just ignore the funny characters you
2see. It is written in the POD format (see pod/perlpod.pod) which is
3specifically designed to be readable as is.
4
5=head1 NAME
6
7README.irix - Perl version 5 on Irix systems
8
9=head1 DESCRIPTION
10
11This document describes various features of Irix that will affect how Perl
12version 5 (hereafter just Perl) is compiled and/or runs.
13
3df9be30 14=head2 Building 32-bit Perl in Irix
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15
16Use
17
18 sh Configure -Dcc='cc -n32'
19
20to compile Perl 32-bit. Don't bother with -n32 unless you have 7.1
21or later compilers (use cc -version to check).
22
23(Building 'cc -n32' is the default.)
24
3df9be30 25=head2 Building 64-bit Perl in Irix
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26
27Use
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538426ad 29 sh Configure -Dcc='cc -64' -Duse64bitint
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31This requires require a 64-bit MIPS CPU (R8000, R10000, ...)
32
33You can also use
34
35 sh Configure -Dcc='cc -64' -Duse64bitall
36
37but that makes no difference compared with the -Duse64bitint because
38of the C<cc -64>.
39
40You can also do
41
42 sh Configure -Dcc='cc -n32' -Duse64bitint
43
44to use long longs for the 64-bit integer type, in case you don't
45have a 64-bit CPU.
46
47If you are using gcc, just
48
49 sh Configure -Dcc=gcc -Duse64bitint
50
51should be enough, the Configure should automatically probe for the
52correct 64-bit settings.
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3df9be30 54=head2 About Compiler Versions of Irix
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3df9be30 56Some Irix cc versions, e.g. 7.3.1.1m (try cc -version) have been known
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57to have issues (coredumps) when compiling perl.c. If you've used
58-OPT:fast_io=ON and this happens, try removing it. If that fails, or
59you didn't use that, then try adjusting other optimization options
60(-LNO, -INLINE, -O3 to -O2, etcetera). The compiler bug has been
61reported to SGI. (Allen Smith <easmith@beatrice.rutgers.edu>)
62
3df9be30 63=head2 Linker Problems in Irix
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64
65If you get complaints about so_locations then search in the file
66hints/irix_6.sh for "lddflags" and do the suggested adjustments.
67(David Billinghurst <David.Billinghurst@riotinto.com.au>)
68
3df9be30 69=head2 Malloc in Irix
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70
71Do not try to use Perl's malloc, this will lead into very mysterious
72errors (especially with -Duse64bitall).
73
538426ad 74=head2 Building with threads in Irix
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76Run Configure with -Duseithreads which will configure Perl with
77the new Perl 5.8.0 "interpreter threads", see L<threads>.
78
79The old Perl 5.005 threads is obsolete, unmaintained, and its use is
80discouraged. If you really want it, run Configure with the
81-Dusethreads -Duse5005threads options as described in INSTALL.
82
83For either thread model and for Irix 6.2, you have to have the
84following patches installed:
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85
86 1404 Irix 6.2 Posix 1003.1b man pages
3df9be30 87 1645 Irix 6.2 & 6.3 POSIX header file updates
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88 2000 Irix 6.2 Posix 1003.1b support modules
89 2254 Pthread library fixes
90 2401 6.2 all platform kernel rollup
91
538426ad 92B<IMPORTANT>: Without patch 2401, a kernel bug in Irix 6.2 will cause
3df9be30 93your machine to panic and crash when running threaded perl. Irix 6.3
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94and later are okay.
95
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96 Thanks to Hannu Napari <Hannu.Napari@hut.fi> for the IRIX
97 pthreads patches information.
98
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99=head1 AUTHOR
100
101Jarkko Hietaniemi <jhi@iki.fi>
102
103Please report any errors, updates, or suggestions to F<perlbug@perl.org>.
104