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If you read this file _as_is_, just ignore the funny characters you
see. It is written in the POD format (see pod/perlpod.pod) which is
specifically designed to be readable as is.
=head1 NAME
README.irix - Perl version 5 on Irix systems
=head1 DESCRIPTION
This document describes various features of Irix that will affect how Perl
version 5 (hereafter just Perl) is compiled and/or runs.
=head2 Building 32-bit Perl in Irix
Use
sh Configure -Dcc='cc -n32'
to compile Perl 32-bit. Don't bother with -n32 unless you have 7.1
or later compilers (use cc -version to check).
(Building 'cc -n32' is the default.)
=head2 Building 64-bit Perl in Irix
Use
sh Configure -Dcc='cc -64'
to compiler Perl 64-bit.
=head2 About Compiler Versions of Irix
Some Irix cc versions, e.g. 7.3.1.1m (try cc -version) have been known
to have issues (coredumps) when compiling perl.c. If you've used
-OPT:fast_io=ON and this happens, try removing it. If that fails, or
you didn't use that, then try adjusting other optimization options
(-LNO, -INLINE, -O3 to -O2, etcetera). The compiler bug has been
reported to SGI. (Allen Smith <easmith@beatrice.rutgers.edu>)
=head2 Linker Problems in Irix
If you get complaints about so_locations then search in the file
hints/irix_6.sh for "lddflags" and do the suggested adjustments.
(David Billinghurst <David.Billinghurst@riotinto.com.au>)
=head2 Malloc in Irix
Do not try to use Perl's malloc, this will lead into very mysterious
errors (especially with -Duse64bitall).
=head2 Building with threads
For Irix 6.2, you have to have the following patches installed:
1404 Irix 6.2 Posix 1003.1b man pages
1645 Irix 6.2 & 6.3 POSIX header file updates
2000 Irix 6.2 Posix 1003.1b support modules
2254 Pthread library fixes
2401 6.2 all platform kernel rollup
IMPORTANT: Without patch 2401, a kernel bug in Irix 6.2 will cause
your machine to panic and crash when running threaded perl. Irix 6.3
and later are okay.
=head1 AUTHOR
Jarkko Hietaniemi <jhi@iki.fi>
Please report any errors, updates, or suggestions to F<perlbug@perl.org>.
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