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469e7be4 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
469e7be4 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
469e7be4 26
27Use
d6fd60d6 28
538426ad 29 sh Configure -Dcc='cc -64' -Duse64bitint
469e7be4 30
538426ad 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.
469e7be4 53
3df9be30 54=head2 About Compiler Versions of Irix
469e7be4 55
3df9be30 56Some Irix cc versions, e.g. 7.3.1.1m (try cc -version) have been known
469e7be4 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
469e7be4 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
469e7be4 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
469e7be4 75
741e2d40 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:
469e7be4 85
86 1404 Irix 6.2 Posix 1003.1b man pages
3df9be30 87 1645 Irix 6.2 & 6.3 POSIX header file updates
469e7be4 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
469e7be4 94and later are okay.
95
741e2d40 96 Thanks to Hannu Napari <Hannu.Napari@hut.fi> for the IRIX
97 pthreads patches information.
98
469e7be4 99=head1 AUTHOR
100
101Jarkko Hietaniemi <jhi@iki.fi>
102
103Please report any errors, updates, or suggestions to F<perlbug@perl.org>.
104