perlirix - 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.

   Building 32-bit Perl in Irix

           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.)

   Building 64-bit Perl in Irix

           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 "cc -64".

   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.

   About Compiler Versions of Irix
   Some Irix cc versions, e.g. (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 <>)

   Linker Problems in Irix
   If you get complaints about so_locations then search in the file
   hints/ for "lddflags" and do the suggested adjustments.
   (David Billinghurst <>)

   Malloc in Irix
   Do not try to use Perl's malloc, this will lead into very mysterious
   errors (especially with -Duse64bitall).

   Building with threads in Irix
   Run Configure with -Duseithreads which will configure Perl with the
   Perl 5.8.0 "interpreter threads", see threads.

   For Irix 6.2 with perl threads, you have to have the following patches

           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 <> for the IRIX
       pthreads patches information.

   Irix 5.3
   While running Configure and when building, you are likely to get quite
   a few of these warnings:

     The shared object /usr/lib/ 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 <>

   Please report any errors, updates, or suggestions to


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