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Update README.vos to reflect recent changes

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Paul Green 2013-03-17 13:46:18 -04:00 committed by Karl Williamson
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README.vos
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@ -4,57 +4,42 @@ specially designed to be readable as is.
=head1 NAME
perlvos - Perl for Stratus VOS
perlvos - Perl for Stratus OpenVOS
=head1 SYNOPSIS
This file contains notes for building perl on the Stratus VOS
This file contains notes for building perl on the Stratus OpenVOS
operating system. Perl is a scripting or macro language that is
popular on many systems. See L<perlbook> for a number of good
books on Perl.
popular on many systems. See L<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.
Perl requires the dynamic linking support that is found in OpenVOS
Release 17.1 and thus is not supported on OpenVOS Release 17.0 or
earlier releases.
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.
pre-compiled, supported copy of perl by purchasing the GNU Tools
product from Stratus Technologies.
=head1 BUILDING PERL FOR VOS
=head1 BUILDING PERL FOR OPENVOS
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 perl from its source code on the Stratus V Series platform
you must have OpenVOS Release 17.1.0 or later, GNU Tools Release
3.5 or later, and the C/POSIX Runtime Libraries.
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.
Follow the normal instructions for building perl; e.g, enter bash, run
the Configure script, then use "gmake" to build perl.
=head1 INSTALLING PERL IN VOS
=head1 INSTALLING PERL IN OPENVOS
=over 4
=item 1
If you have built perl using the Configure script, ensure that
you have modify and default write permission to C<<
>system>ported >> and all subdirectories. Then type
After you have built perl using the Configure script, ensure that you
have modify and default write permission to C<< >system>ported >> and
all subdirectories. Then type
gmake install
@ -65,8 +50,6 @@ 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
=item 3
@ -79,8 +62,6 @@ two places. Put architecture-independent files into:
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
=item 4
@ -90,61 +71,33 @@ to see the order in which Perl searches these directories.
=back
=head1 USING PERL IN VOS
=head1 USING PERL IN OPENVOS
=head2 Restrictions of Perl on VOS
=head2 Restrictions of Perl on OpenVOS
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 version 5 prefers Unix-style, slash-separated
pathnames over OpenVOS-style greater-than-separated pathnames.
OpenVOS-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 OpenVOS 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
See the file pod/perlport.pod for more information about the OpenVOS
port of Perl.
=head2 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.
=head1 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
A number of the perl self-tests fails for various reasons; generally
these are minor and due to subtle differences between common
POSIX-based environments and the OpenVOS POSIX environment. Ensure
that you conduct sufficient testing of your code to guarantee that it
works properly in the OpenVOS environment.
=head1 SUPPORT STATUS
@ -153,10 +106,9 @@ 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).
If you want a supported version of perl for OpenVOS, purchase the
OpenVOS GNU Tools product from Stratus Technologies, along with a
support contract (or from anyone else who will sell you support).
=head1 AUTHOR
@ -164,6 +116,6 @@ Paul Green (Paul.Green@stratus.com)
=head1 LAST UPDATE
October 6, 2010
February 28, 2013
=cut