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PERLVOS(1)                            Perl Programmers Reference Guide                            PERLVOS(1)



NAME
       README.vos - Perl for Stratus VOS

SYNOPSIS
       This file contains notes for building perl on the Stratus VOS operating system.  Perl is a scripting
       or macro language that is popular on many systems.  See perlbook for a number of good books on Perl.

       These are instructions for building Perl from source.  This version of Perl is not supported on VOS
       Release 14.2 or earlier releases.  If you have a Continuum platform running VOS Release 14.3 through
       14.7, download Perl from the Stratus Anonymous FTP site at
       ftp://ftp.stratus.com/pub/vos/posix/ga/continuum/continuum.html.  If you have a V Series platform
       running VOS Release 15.0 or later, or if you have a V Series platform running OpenVOS Release 17.0 or
       later, download Perl from ftp://ftp.stratus.com/pub/vos/posix/ga/v-series/v-series.html.  The perl
       distribution files on the Stratus anonymous FTP site are stored in a format called a "bundled file".
       Instructions for unbundling the Perl distribution file are at
       ftp://ftp.stratus.com/pub/vos/utility/utility.html.

       If you are running VOS Release 14.4.1 or later, you can obtain a pre-compiled, supported copy of perl
       by purchasing Release 2.0.1 (or later) of the VOS GNU C/C++ and GNU Tools product from Stratus
       Technologies.

BUILDING PERL FOR VOS
       To build perl from its source code on the Stratus Continuum platform, you must be have VOS Release
       14.5.0 or later, the STCP product, and the GNU C/C++ and GNU Tools, Release 2.0.1 or later.  On the V
       Series platform you must have VOS Release 15.0.0 or later, and any version of the GNU C/C++ and GNU
       Tools product.

       To build full perl using the supplied Configure script and makefiles, change to the "vos"
       subdirectory and type the command "compile_full_perl" or "start_process compile_full_perl".  This
       will configure, build, and test perl.

INSTALLING PERL IN VOS
       1.  If you have built perl using the Configure script, ensure that you have modify and default write
           permission to ">system>ported" and all subdirectories.  Then type

                gmake install

       2.  While there are currently no architecture-specific extensions or modules distributed with perl,
           the following directories can be used to hold such files (replace the string VERSION by the
           appropriate version number):

                >system>ported>lib>perl5>VERSION>7100
                >system>ported>lib>perl5>VERSION>8000
                >system>ported>lib>perl5>VERSION>i786

       3.  Site-specific perl extensions and modules can be installed in one of two places.  Put
           architecture-independent files into:

                >system>ported>lib>perl5>site_perl>VERSION

           Put site-specific architecture-dependent files into one of the following directories:

                >system>ported>lib>perl5>site_perl>VERSION>7100
                >system>ported>lib>perl5>site_perl>VERSION>8000
                >system>ported>lib>perl5>site_perl>VERSION>i786

       4.  You can examine the @INC variable from within a perl program to see the order in which Perl
           searches these directories.

USING PERL IN VOS
   Restrictions of Perl on VOS
       This port of Perl version 5 to VOS prefers Unix-style, slash-separated pathnames over VOS-style
       greater-than-separated pathnames.  VOS-style pathnames should work in most contexts, but if you have
       trouble, replace all greater-than characters by slash characters.  Because the slash character is
       used as a pathname delimiter, Perl cannot process VOS pathnames containing a slash character in a
       directory or file name; these must be renamed.

       This port of Perl also uses Unix-epoch date values internally.  As long as you are dealing with ASCII
       character string representations of dates, this should not be an issue.  The supported epoch is
       January 1, 1980 to January 17, 2038.

       See the file pod/perlport.pod for more information about the VOS port of Perl.

   Handling of underflow and overflow
       Prior to VOS Release 14.7.0, VOS does not support automatically mapping overflowed floating-point
       values to +infinity, nor automatically mapping underflowed floating-point values to zero, unlike many
       other platforms.  The Perl pack function has been modified to perform such mapping in software on
       VOS.  Performing other floating-point computations that underflow or overflow will probably result in
       SIGFPE.  Don't push your luck.

       As of VOS Release 14.7.0 or later, the VOS POSIX runtime sets up the PA-RISC and IA-32 hardware
       floating-point status register so that the overflow and underflow exceptions do not trap, but instead
       automatically convert the result to infinity or zero, as appropriate.  As of this writing, there are
       still floating-point operations that can trap, for example, subtracting two infinite values.  This is
       recorded as suggestion posix-1022, which has been fixed in VOS Release 15.2 and higher.

TEST STATUS
       When Perl 5.9.0 is built using the native build process on VOS Release 14.7.0 and GNU C++/GNU Tools
       2.0.2a, all but nine attempted tests either pass or result in TODO (ignored) failures.  The tests
       that fail are:

       t/io/dup, test 2 t/io/tell, test 28 t/op/pack, test 0 ext/B/t/bytecode, test 1 ext/Devel/Peek/t/Peek,
       test 1 ext/Encode/t/enc_module, test 1 ext/IO/t/io_dup, test 2 lib/ExtUtils/t/MM_Unix, test 94
       lib/Net/ing/t/450_service, test 8

SUPPORT STATUS
       I'm offering this port "as is".  You can ask me questions, but I can't guarantee I'll be able to
       answer them.  There are some excellent books available on the Perl language; consult a book seller.

       If you want a supported version of perl for VOS, purchase the VOS GNU C/C++ and GNU Tools Release
       2.0.1 (or later) product from Stratus Technologies, along with a support contract (or from anyone
       else who will sell you support).

AUTHOR
       Paul Green (Paul.Green@stratus.com)

LAST UPDATE
       October 6, 2010



perl v5.12.5                                     2012-11-03                                       PERLVOS(1)