perl/README.os400
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   4
   5=head1 NAME
   6
   7README.os400 - Perl version 5 on OS/400
   8
   9=head1 DESCRIPTION
  10
  11This document describes various features of IBM's OS/400 operating
  12system that will affect how Perl version 5 (hereafter just Perl) is
  13compiled and/or runs.
  14
  15By far the easiest way to build Perl for OS/400 is to use the PASE
  16(Portable Application Solutions Environment), for more information see
  17http://www.iseries.ibm.com/developer/factory/pase/index.html
  18This environment allows one to use AIX APIs while programming, and it
  19provides a runtime that allows AIX binaries to execute directly on the
  20PowerPC iSeries.
  21
  22=head2 Compiling Perl for OS/400 PASE
  23
  24The recommended way to build Perl for the OS/400 PASE is to build the
  25Perl 5 source code (release 5.8.1 or later) under AIX.
  26
  27The trick is to give a special parameter to the Configure shell script
  28when running it on AIX:
  29
  30  sh Configure -DPASE ...
  31
  32The default installation directory of Perl under PASE is /QOpenSys/perl.
  33This can be modified if needed with Configure parameter -Dprefix=/some/dir.
  34
  35Starting from OS/400 V5R2 the IBM Visual Age compiler is supported
  36on OS/400 PASE, so it is possible to build Perl natively on OS/400.  
  37The easier way, however, is to compile in AIX, as just described.
  38
  39If you don't want to install the compiled Perl in AIX into /QOpenSys
  40(for packaging it before copying it to PASE), you can use a Configure
  41parameter: -Dinstallprefix=/tmp/QOpenSys/perl.  This will cause the
  42"make install" to install everything into that directory, while the
  43installed files still think they are (will be) in /QOpenSys/perl.
  44
  45If building natively on PASE, please do the build under the /QOpenSys
  46directory, since Perl is happier when built on a case sensitive filesystem.
  47
  48=head2 Installing Perl in OS/400 PASE
  49
  50If you are compiling on AIX, simply do a "make install" on the AIX box.
  51Once the install finishes, tar up the /QOpenSys/perl directory.  Transfer
  52the tarball to the OS/400 using FTP with the following commands:
  53
  54  > binary
  55  > site namefmt 1
  56  > put perl.tar /QOpenSys
  57
  58Once you have it on, simply bring up a PASE shell and extract the tarball.
  59
  60If you are compiling in PASE, then "make install" is the only thing you
  61will need to do.
  62
  63The default path for perl binary is /QOpenSys/perl/bin/perl.  You'll
  64want to symlink /QOpenSys/usr/bin/perl to this file so you don't have
  65to modify your path.
  66
  67=head2 Using Perl in OS/400 PASE
  68
  69Perl in PASE may be used in the same manner as you would use Perl on AIX.
  70
  71Scripts starting with #!/usr/bin/perl should work if you have
  72/QOpenSys/usr/bin/perl symlinked to your perl binary.  This will not
  73work if you've done a setuid/setgid or have environment variable
  74PASE_EXEC_QOPENSYS="N".  If you have V5R1, you'll need to get the
  75latest PTFs to have this feature.  Scripts starting with
  76#!/QOpenSys/perl/bin/perl should always work.
  77
  78=head2 Known Problems
  79
  80When compiling in PASE, there is no "oslevel" command.  Therefore,
  81you may want to create a script called "oslevel" that echoes the
  82level of AIX that your version of PASE runtime supports.  If you're
  83unsure, consult your documentation or use "4.3.3.0".
  84
  85If you have test cases that fail, check for the existence of spool files.
  86The test case may be trying to use a syscall that is not implemented
  87in PASE.  To avoid the SIGILL, try setting the PASE_SYSCALL_NOSIGILL
  88environment variable or have a handler for the SIGILL.  If you can
  89compile programs for PASE, run the config script and edit config.sh
  90when it gives you the option.  If you want to remove fchdir(), which
  91isn't implement in V5R1, simply change the line that says:
  92
  93d_fchdir='define'
  94
  95to
  96
  97d_fchdir='undef'
  98
  99and then compile Perl.  The places where fchdir() is used have
 100alternatives for systems that do not have fchdir() available.
 101
 102=head2 Perl on ILE
 103
 104There exists a port of Perl to the ILE environment.  This port, however,
 105is based quite an old release of Perl, Perl 5.00502 (August 1998).
 106(As of July 2002 the latest release of Perl is 5.8.0, and even 5.6.1
 107has been out since April 2001.)  If you need to run Perl on ILE, though,
 108you may need this older port: http://www.cpan.org/ports/#os400
 109Note that any Perl release later than 5.00502 has not been ported to ILE.
 110
 111If you need to use Perl in the ILE environment, you may want to consider
 112using Qp2RunPase() to call the PASE version of Perl.
 113
 114=head1 AUTHORS
 115
 116Jarkko Hietaniemi <jhi@iki.fi>
 117Bryan Logan <bryanlog@us.ibm.com>
 118David Larson <larson1@us.ibm.com>
 119
 120=cut
 121
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