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. Most people can
simply download a pre-compiled distribution from the VOS anonymous FTP
site. This version of Perl is not supported on VOS Release 14.2.0 or
earlier releases. If you are running VOS 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.
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++ and GNU Tools product from Stratus Technologies.
BUILDING PERL FOR VOS
To build perl from its source code, you must have a Continuum platform
running VOS Release 14.5.0 or later, the STCP product, and the GNU C++
and GNU Tools, Release 2.0.1 or later.
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 permission to ">system>ported" and 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:
>system>ported>lib>perl5>5.9.0>7100
>system>ported>lib>perl5>5.9.0>8000
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>5.9.0
Put site-specific architecture-dependent files into one of the
following directories:
>system>ported>lib>perl5>site_perl>5.9.0>7100
>system>ported>lib>perl5>site_perl>5.9.0>8000
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, the VOS POSIX 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.
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++ 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
January 15, 2004
perl v5.10.0 2007-12-18 PERLVOS(1)
