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perlos390 ()
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         README.os390 - building and installing Perl for OS/390.


         This document will help you Configure, build, test and
         install Perl on OS/390 Unix System Services.


         This is a fully ported perl for OS/390 Release 3, 5 and 6.
         It may work on other versions, but those are the ones we've
         tested it on.
         You may need to carry out some system configuration tasks
         before running the Configure script for perl.
         Gunzip/gzip for OS/390 is discussed at:
         to extract an ASCII tar archive on OS/390, try this:
            pax -o to=IBM-1047,from=ISO8859-1 -r < latest.tar
         Setup and utilities
         Be sure that your yacc installation is in place including
         any necessary parser template files. If you have not already
         done so then be sure to:
           cp /samples/yyparse.c /etc
         This may also be a good time to ensure that your
         /etc/protocol file and either your /etc/resolv.conf or
         /etc/hosts files are in place.
         GNU make for OS/390, which may be required for the build of
         perl, is available from:
         Once you've unpacked the distribution, run "sh Configure"
         (see INSTALL for a full discussion of the Configure
         options).  There is a "hints" file for os390 that specifies
         the correct values for most things.  Some things to watch
         out for include:
         o   Some of the parser default template files in /samples
             are needed in /etc.  In particular be sure that you at
             least copy /samples/yyparse.c to /etc before running
             perl's Configure.  This step ensures successful
             extraction of EBCDIC versions of parser files such as
         o   This port doesn't support dynamic loading.  Although
             OS/390 has support for DLLs, there are some differences
             that cause problems for perl.
         o   You may see a "WHOA THERE!!!" message for
             $d_shmatprototype it is OK to keep the recommended
         o   Don't turn on the compiler optimization flag "-O".
             There's a bug in either the optimizer or perl that
             causes perl to not work correctly when the optimizer is
         o   Some of the configuration files in /etc used by the
             networking APIs are either missing or have the wrong
             names.  In particular, make sure that there's either an
             /etc/resolv.conf or and /etc/hosts, so that
             gethostbyname() works, and make sure that the file
             /etc/proto has been renamed to /etc/protocol (NOT
             /etc/protocols, as used by other Unix systems).
         Build, test, install
         Simply put:
             sh Configure
             make test
         if everything looks ok then:
             make install
         this last step may or may not require UID=0 privileges
         depending on how you answered the questions that Configure
         asked and whether or not you have write access to the
         directories you specified.
         Usage Hints
         When using perl on OS/390 please keep in mind that the
         EBCDIC and ASCII character sets are different.  Perl builtin
         functions that may behave differently under EBCDIC are
         mentioned in the perlport.pod document.
         OpenEdition (UNIX System Services) does not (yet) support
         the #! means of script invokation.  See:
             head `whence perldoc`
         for an example of how to use the "eval exec" trick to ask
         the shell to have perl run your scripts for you.
         You can build xs based extensions to Perl for OS/390 but
         will need to follow the instructions in ExtUtils::MakeMaker
         for building statically linked perl binaries.  In most cases
         people have reported better results with GNU make rather
         than the system's /bin/make.


         David Fiander and Peter Prymmer.


         the INSTALL manpage, the perlport manpage, the
         ExtUtils::MakeMaker manpage.
         Mailing list
         The Perl Institute ( maintains a perl-
         mvs mailing list of interest to all folks building and/or
         using perl on EBCDIC platforms.  To subscibe, send a message
             subscribe perl-mvs


         This document was originally written by David Fiander for
         the 5.005 release of Perl.
         This document was podified for the 5.005_03 release of perl
         11 March 1999.

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