perlvos.1

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.\" ========================================================================
.\"
.IX Title "PERLVOS 1"
.TH PERLVOS 1 "2007-12-18" "perl v5.10.0" "Perl Programmers Reference Guide"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
.if n .ad l
.nh
.SH "NAME"
README.vos \- Perl for Stratus VOS
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
This file contains notes for building perl on the Stratus \s-1VOS\s0
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.
.PP
These are instructions for building Perl from source.  Most
people can simply download a pre-compiled distribution from the
\&\s-1VOS\s0 anonymous \s-1FTP\s0 site.  This version of Perl is not supported
on \s-1VOS\s0 Release 14.2.0 or earlier releases.  If you are running
\&\s-1VOS\s0 Release 14.3.0 or later, download Perl from
ftp://ftp.stratus.com/pub/vos/posix/ga/ga.html.  Instructions
for unbundling the Perl distribution file are at
ftp://ftp.stratus.com/pub/vos/utility/utility.html.
.PP
If you are running \s-1VOS\s0 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 \s-1VOS\s0 \s-1GNU\s0 \*(C+ and \s-1GNU\s0 Tools product from Stratus
Technologies.
.SH "BUILDING PERL FOR VOS"
.IX Header "BUILDING PERL FOR VOS"
To build perl from its source code, you must have a Continuum
platform running \s-1VOS\s0 Release 14.5.0 or later, the \s-1STCP\s0 product,
and the \s-1GNU\s0 \*(C+ and \s-1GNU\s0 Tools, Release 2.0.1 or later.
.PP
To build full perl using the supplied Configure script and
makefiles, change to the \*(L"vos\*(R" subdirectory and type the command
\&\*(L"compile_full_perl\*(R" or \*(L"start_process compile_full_perl\*(R".  This
will configure, build, and test perl.
.SH "INSTALLING PERL IN VOS"
.IX Header "INSTALLING PERL IN VOS"
.IP "1." 4
If you have built perl using the Configure script, ensure that
you have modify permission to \f(CW\*(C`>system>ported\*(C'\fR and type
.Sp
.Vb 1
\&     gmake install
.Ve
.IP "2." 4
While there are currently no architecture-specific
extensions or modules distributed with perl, the following
directories can be used to hold such files:
.Sp
.Vb 2
\&     >system>ported>lib>perl5>5.9.0>7100
\&     >system>ported>lib>perl5>5.9.0>8000
.Ve
.IP "3." 4
Site-specific perl extensions and modules can be installed in one of
two places.  Put architecture-independent files into:
.Sp
.Vb 1
\&     >system>ported>lib>perl5>site_perl>5.9.0
.Ve
.Sp
Put site-specific architecture-dependent files into one of the
following directories:
.Sp
.Vb 2
\&     >system>ported>lib>perl5>site_perl>5.9.0>7100
\&     >system>ported>lib>perl5>site_perl>5.9.0>8000
.Ve
.IP "4." 4
You can examine the \f(CW@INC\fR variable from within a perl program
to see the order in which Perl searches these directories.
.SH "USING PERL IN VOS"
.IX Header "USING PERL IN VOS"
.Sh "Restrictions of Perl on \s-1VOS\s0"
.IX Subsection "Restrictions of Perl on VOS"
This port of Perl version 5 to \s-1VOS\s0 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 \s-1VOS\s0 pathnames containing a slash
character in a directory or file name; these must be renamed.
.PP
This port of Perl also uses Unix-epoch date values internally.
As long as you are dealing with \s-1ASCII\s0 character string
representations of dates, this should not be an issue.  The
supported epoch is January 1, 1980 to January 17, 2038.
.PP
See the file pod/perlport.pod for more information about the \s-1VOS\s0
port of Perl.
.Sh "Handling of underflow and overflow"
.IX Subsection "Handling of underflow and overflow"
Prior to \s-1VOS\s0 Release 14.7.0, \s-1VOS\s0 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 \s-1VOS\s0.  Performing
other floating-point computations that underflow or overflow
will probably result in \s-1SIGFPE\s0.  Don't push your luck.
.PP
As of \s-1VOS\s0 Release 14.7.0, the \s-1VOS\s0 \s-1POSIX\s0 runtime sets up the
PA-RISC 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 is not
yet fixed.
.SH "TEST STATUS"
.IX Header "TEST STATUS"
When Perl 5.9.0 is built using the native build process on \s-1VOS\s0
Release 14.7.0 and \s-1GNU\s0 \*(C+/GNU Tools 2.0.2a, all but nine
attempted tests either pass or result in \s-1TODO\s0 (ignored)
failures.  The tests that fail are:
.PP
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
.SH "SUPPORT STATUS"
.IX Header "SUPPORT STATUS"
I'm offering this port \*(L"as is\*(R".  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.
.PP
If you want a supported version of perl for \s-1VOS\s0, purchase the
\&\s-1VOS\s0 \s-1GNU\s0 \*(C+ and \s-1GNU\s0 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).
.SH "AUTHOR"
.IX Header "AUTHOR"
Paul Green ([e-mail])
.SH "LAST UPDATE"
.IX Header "LAST UPDATE"
January 15, 2004