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PERLOS400(1)			 Perl Programmers Reference Guide		     PERLOS400(1)

       README.os400 - Perl version 5 on OS/400

       This document describes various features of IBM's OS/400 operating system that will affect
       how Perl version 5 (hereafter just Perl) is compiled and/or runs.

       By far the easiest way to build Perl for OS/400 is to use the PASE (Portable Application
       Solutions Environment), for more information see http://www.iseries.ibm.com/developer/fac-
       tory/pase/index.html This environment allows one to use AIX APIs while programming, and it
       provides a runtime that allows AIX binaries to execute directly on the PowerPC iSeries.

       Compiling Perl for OS/400 PASE

       The recommended way to build Perl for the OS/400 PASE is to build the Perl 5 source code
       (release 5.8.1 or later) under AIX.

       The trick is to give a special parameter to the Configure shell script when running it on

	 sh Configure -DPASE ...

       The default installation directory of Perl under PASE is /QOpenSys/perl.  This can be mod-
       ified if needed with Configure parameter -Dprefix=/some/dir.

       Starting from OS/400 V5R2 the IBM Visual Age compiler is supported on OS/400 PASE, so it
       is possible to build Perl natively on OS/400.  The easier way, however, is to compile in
       AIX, as just described.

       If building natively on PASE, please do the build under the /QOpenSys directory, since
       Perl is happier when built on a case sensitive filesystem.

       Installing Perl in OS/400 PASE

       If you are compiling on AIX, simply do a "make install" on the AIX box.	Once the install
       finishes, tar up the /QOpenSys/perl directory.  Transfer the tarball to the OS/400 using
       FTP with the following commands:

	 > binary
	 > site namefmt 1
	 > put perl.tar /QOpenSys

       Once you have it on, simply bring up a PASE shell and extract the tarball.

       If you are compiling in PASE, then "make install" is the only thing you will need to do.

       The default path for perl binary is /QOpenSys/perl/bin/perl.  You'll want to symlink
       /QOpenSys/usr/bin/perl to this file so you don't have to modify your path.

       Using Perl in OS/400 PASE

       Perl in PASE may be used in the same manner as you would use Perl on AIX.

       Scripts starting with #!/usr/bin/perl should work if you have /QOpenSys/usr/bin/perl sym-
       linked to your perl binary.  This will not work if you've done a setuid/setgid or have
       environment variable PASE_EXEC_QOPENSYS="N".  If you have V5R1, you'll need to get the
       latest PTFs to have this feature.  Scripts starting with #!/QOpenSys/perl/bin/perl should
       always work.

       Known Problems

       When compiling in PASE, there is no "oslevel" command.  Therefore, you may want to create
       a script called "oslevel" that echoes the level of AIX that your version of PASE runtime
       supports.  If you're unsure, consult your documentation or use "".

       If you have test cases that fail, check for the existence of spool files.  The test case
       may be trying to use a syscall that is not implemented in PASE.	To avoid the SIGILL, try
       setting the PASE_SYSCALL_NOSIGILL environment variable or have a handler for the SIGILL.
       If you can compile programs for PASE, run the config script and edit config.sh when it
       gives you the option.  If you want to remove fchdir(), which isn't implement in V5R1, sim-
       ply change the line that says:




       and then compile Perl.  The places where fchdir() is used have alternatives for systems
       that do not have fchdir() available.

       Perl on ILE

       There exists a port of Perl to the ILE environment.  This port, however, is based quite an
       old release of Perl, Perl 5.00502 (August 1998).  (As of July 2002 the latest release of
       Perl is 5.8.0, and even 5.6.1 has been out since April 2001.)  If you need to run Perl on
       ILE, though, you may need this older port: http://www.cpan.org/ports/#os400 Note that any
       Perl release later than 5.00502 has not been ported to ILE.

       If you need to use Perl in the ILE environment, you may want to consider using Qp2Run-
       Pase() to call the PASE version of Perl.

       Jarkko Hietaniemi <jhi@iki.fi> Bryan Logan <bryanlog@us.ibm.com> David Larson <lar-

perl v5.8.0				    2003-02-18				     PERLOS400(1)
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