README.irix - Perl version 5 on Irix systems
This document describes various features of Irix that will affect how Perl version 5 (hereafter just Perl) is compiled and/or runs.
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.)
sh Configure -Dcc='cc -64' -Duse64bitint
This requires require a 64-bit MIPS CPU (R8000, R10000, ...)
You can also use
sh Configure -Dcc='cc -64' -Duse64bitall
but that makes no difference compared with the -Duse64bitint because of the
You can also do
sh Configure -Dcc='cc -n32' -Duse64bitint
to use long longs for the 64-bit integer type, in case you don't have a 64-bit CPU.
If you are using gcc, just
sh Configure -Dcc=gcc -Duse64bitint
should be enough, the Configure should automatically probe for the correct 64-bit settings.
Some Irix cc versions, e.g. 126.96.36.199m (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 <email@example.com>)
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>)
Do not try to use Perl's malloc, this will lead into very mysterious errors (especially with -Duse64bitall).
Run Configure with -Duseithreads which will configure Perl with the new Perl 5.8.0 "interpreter threads", see threads.
The old Perl 5.005 threads is obsolete, unmaintained, and its use is discouraged. If you really want it, run Configure with the -Dusethreads -Duse5005threads options as described in INSTALL.
For either thread model and 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.
Thanks to Hannu Napari <Hannu.Napari@hut.fi> for the IRIX pthreads patches information.
While running Configure and when building, you are likely to get quite a few of these warnings:
ld: The shared object /usr/lib/libm.so did not resolve any symbols. You may want to remove it from your link line.
Ignore them: in IRIX 5.3 there is no way to quieten ld about this.
During compilation you will see this warning from toke.c:
uopt: Warning: Perl_yylex: this procedure not optimized because it exceeds size threshold; to optimize this procedure, use -Olimit option with value >= 4252.
Ignore the warning.
In IRIX 5.3 and with Perl 5.8.1 (Perl 5.8.0 didn't compile in IRIX 5.3) the following failures are known.
Failed Test Stat Wstat Total Fail Failed List of Failed -------------------------------------------------------------------------- ../ext/List/Util/t/shuffle.t 0 139 ?? ?? % ?? ../lib/Math/Trig.t 255 65280 29 12 41.38% 24-29 ../lib/sort.t 0 138 119 72 60.50% 48-119 56 tests and 474 subtests skipped. Failed 3/811 test scripts, 99.63% okay. 78/75813 subtests failed, 99.90% okay.
They are suspected to be compiler errors (at least the shuffle.t failure is known from some IRIX 6 setups) and math library errors (the Trig.t failure), but since IRIX 5 is long since end-of-lifed, further fixes for the IRIX are unlikely. If you can get gcc for 5.3, you could try that, too, since gcc in IRIX 6 is a known workaround for at least the shuffle.t and sort.t failures.
Jarkko Hietaniemi <firstname.lastname@example.org>
Please report any errors, updates, or suggestions to email@example.com.