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PERLVMESA(1)	       Perl Programmers Reference Guide		  PERLVMESA(1)

       README.vmesa - building and installing Perl for VM/ESA.

       This document will help you Configure, build, test and install Perl on

       This is a fully ported perl for VM/ESA 2.3.0.  It may work on other
       versions, but that's the one we've tested it on.

       If you've downloaded the binary distribution, it needs to be installed
       below /usr/local.  Source code distributions have an automated "make
       install" step that means you do not need to extract the source code
       below /usr/local (though that is where it will be installed by
       default).  You may need to worry about the networking configuration
       files discussed in the last bullet below.

   Unpacking Perl Distribution on VM/ESA
       To extract an ASCII tar archive on VM/ESA, try this:

	  pax -o to=IBM-1047,from=ISO8859-1 -r < latest.tar

   Setup Perl and utilities on VM/ESA
       GNU make for VM/ESA, which may be required for the build of perl, is
       available from:

   Configure Perl on VM/ESA
       Once you've unpacked the distribution, run Configure (see INSTALL for
       full discussion of the Configure options), and then run make, then
       "make test" then "make install" (this last step may require UID=0

       There is a "hints" file for vmesa that specifies the correct values for
       most things.  Some things to watch out for are:

       ·   this port does support dynamic loading but it's not had much

       ·   Don't turn on the compiler optimization flag "-O".  There's a bug
	   in the compiler (APAR PQ18812) that generates some bad code the
	   optimizer is on.

       ·   As VM/ESA doesn't fully support the fork() API programs relying on
	   this call will not work. I've replaced fork()/exec() with spawn()
	   and the standalone exec() with spawn(). This has a side effect when
	   opening unnamed pipes in a shell script: there is no child process
	   generated under.

       ·   At the moment the hints file for VM/ESA basically bypasses all of
	   the automatic configuration process.	 This is because Configure
	   relies on: 1. The header files living in the Byte File System (you
	   could put the there if you want); 2. The C preprocessor including
	   the #include statements in the preprocessor output (.i) file.

   Testing Anomalies of Perl on VM/ESA
       The "make test" step runs a Perl Verification Procedure, usually before
       installation.  As the 5.6.1 kit was being assembled the following
       "failures" were known to appear on some machines during "make test"
       (mostly due to ASCII vs. EBCDIC conflicts), your results may differ:

       [the list of failures being compiled]

   Usage Hints for Perl on VM/ESA
       When using perl on VM/ESA 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 invocation.  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.

       Neale Ferguson.

       INSTALL, perlport, perlebcdic.

   Mailing list for Perl on VM/ESA
       If you are interested in the VM/ESA, z/OS (formerly known as OS/390)
       and POSIX-BC (BS2000) ports of Perl then see the perl-mvs mailing list.
       To subscribe, send an empty message to

       See also:

       There are web archives of the mailing list at:

perl v5.12.2			  2010-09-05			  PERLVMESA(1)
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