perlbs2000
(1)
Name
perlbs2000 - building and installing Perl for BS2000.
Synopsis
This document will help you Configure, build, test and
install Perl on BS2000 in the POSIX subsystem.
Description
Perl Programmers Reference Guide PERLBS2000(1)
NAME
README.BS2000 - building and installing Perl for BS2000.
SYNOPSIS
This document will help you Configure, build, test and
install Perl on BS2000 in the POSIX subsystem.
DESCRIPTION
This is a ported perl for the POSIX subsystem in BS2000
VERSION OSD V3.1A or later. It may work on other versions,
but we started porting and testing it with 3.1A and are
currently using Version V4.0A.
You may need the following GNU programs in order to install
perl:
gzip on BS2000
We used version 1.2.4, which could be installed out of the
box with one failure during 'make check'.
bison on BS2000
The yacc coming with BS2000 POSIX didn't work for us. So we
had to use bison. We had to make a few changes to perl in
order to use the pure (reentrant) parser of bison. We used
version 1.25, but we had to add a few changes due to EBCDIC.
See below for more details concerning yacc.
Unpacking Perl Distribution on BS2000
To extract an ASCII tar archive on BS2000 POSIX you need an
ASCII filesystem (we used the mountpoint /usr/local/ascii
for this). Now you extract the archive in the ASCII
filesystem without I/O-conversion:
cd /usr/local/ascii export IO_CONVERSION=NO gunzip <
/usr/local/src/perl.tar.gz | pax -r
You may ignore the error message for the first element of
the archive (this doesn't look like a tar archive / skipping
to next file...), it's only the directory which will be
created automatically anyway.
After extracting the archive you copy the whole directory
tree to your EBCDIC filesystem. This time you use
I/O-conversion:
cd /usr/local/src IO_CONVERSION=YES cp -r
/usr/local/ascii/perl5.005_02 ./
Compiling Perl on BS2000
There is a "hints" file for BS2000 called hints.posix-bc
(because posix-bc is the OS name given by `uname`) that
specifies the correct values for most things. The major
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problem is (of course) the EBCDIC character set. We have
german EBCDIC version.
Because of our problems with the native yacc we used GNU
bison to generate a pure (=reentrant) parser for perly.y.
So our yacc is really the following script:
-----8<-----/usr/local/bin/yacc-----8<----- #! /usr/bin/sh
# Bison as a reentrant yacc:
# save parameters: params="" while [[ $# -gt 1 ]]; do
params="$params $1"
shift done
# add flag %pure_parser:
tmpfile=/tmp/bison.$$.y echo %pure_parser > $tmpfile cat $1
>> $tmpfile
# call bison:
echo "/usr/local/bin/bison --yacc $params $1\t\t\t(Pure
Parser)" /usr/local/bin/bison --yacc $params $tmpfile
# cleanup:
rm -f $tmpfile -----8<----------8<-----
We still use the normal yacc for a2p.y though!!! We made a
softlink called byacc to distinguish between the two
versions:
ln -s /usr/bin/yacc /usr/local/bin/byacc
We build perl using GNU make. We tried the native make once
and it worked too.
Testing Perl on BS2000
We still got a few errors during "make test". Some of them
are the result of using bison. Bison prints parser error
instead of syntax error, so we may ignore them. The
following list shows our errors, your results may differ:
op/numconvert.......FAILED tests 1409-1440
op/regexp...........FAILED tests 483, 496
op/regexp_noamp.....FAILED tests 483, 496
pragma/overload.....FAILED tests 152-153, 170-171
pragma/warnings.....FAILED tests 14, 82, 129, 155, 192, 205,
207 lib/bigfloat........FAILED tests 351-352, 355
lib/bigfltpm........FAILED tests 354-355, 358
lib/complex.........FAILED tests 267, 487
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lib/dumper..........FAILED tests 43, 45 Failed 11/231 test
scripts, 95.24% okay. 57/10595 subtests failed, 99.46% okay.
Installing Perl on BS2000
We have no nroff on BS2000 POSIX (yet), so we ignored any
errors while installing the documentation.
Using Perl in the Posix-Shell of BS2000
BS2000 POSIX doesn't support the shebang notation
("#!/usr/local/bin/perl"), so you have to use the following
lines instead:
: # use perl
eval 'exec /usr/local/bin/perl -S $0 ${1+"$@"}'
if $running_under_some_shell;
Using Perl in "native" BS2000
We don't have much experience with this yet, but try the
following:
Copy your Perl executable to a BS2000 LLM using bs2cp:
"bs2cp /usr/local/bin/perl 'bs2:perl(perl,l)'"
Now you can start it with the following (SDF) command:
"/START-PROG
FROM-FILE=*MODULE(PERL,PERL),PROG-MODE=*ANY,RUN-MODE=*ADV"
First you get the BS2000 commandline prompt ('*'). Here you
may enter your parameters, e.g. "-e 'print "Hello
World!\\n";'" (note the double backslash!) or "-w" and the
name of your Perl script. Filenames starting with "/" are
searched in the Posix filesystem, others are searched in the
BS2000 filesystem. You may even use wildcards if you put a
"%" in front of your filename (e.g. "-w checkfiles.pl
%*.c"). Read your C/C++ manual for additional possibilities
of the commandline prompt (look for PARAMETER-PROMPTING).
Floating point anomalies on BS2000
There appears to be a bug in the floating point
implementation on BS2000 POSIX systems such that calling
int() on the product of a number and a small magnitude
number is not the same as calling int() on the quotient of
that number and a large magnitude number. For example, in
the following Perl code:
my $x = 100000.0;
my $y = int($x * 1e-5) * 1e5; # '0'
my $z = int($x / 1e+5) * 1e5; # '100000'
print "\$y is $y and \$z is $z\n"; # $y is 0 and $z is 100000
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Although one would expect the quantities $y and $z to be the
same and equal to 100000 they will differ and instead will
be 0 and 100000 respectively.
Using PerlIO and different encodings on ASCII and EBCDIC
partitions
Since version 5.8 Perl uses the new PerlIO on BS2000. This
enables you using different encodings per IO channel. For
example you may use
use Encode;
open($f, ">:encoding(ascii)", "test.ascii");
print $f "Hello World!\n";
open($f, ">:encoding(posix-bc)", "test.ebcdic");
print $f "Hello World!\n";
open($f, ">:encoding(latin1)", "test.latin1");
print $f "Hello World!\n";
open($f, ">:encoding(utf8)", "test.utf8");
print $f "Hello World!\n";
to get two files containing "Hello World!\n" in ASCII,
EBCDIC, ISO Latin-1 (in this example identical to ASCII)
respective UTF-EBCDIC (in this example identical to normal
EBCDIC). See the documentation of Encode::PerlIO for
details.
As the PerlIO layer uses raw IO internally, all this totally
ignores the type of your filesystem (ASCII or EBCDIC) and
the IO_CONVERSION environment variable. If you want to get
the old behavior, that the BS2000 IO functions determine
conversion depending on the filesystem PerlIO still is your
friend. You use IO_CONVERSION as usual and tell Perl, that
it should use the native IO layer:
export IO_CONVERSION=YES
export PERLIO=stdio
Now your IO would be ASCII on ASCII partitions and EBCDIC on
EBCDIC partitions. See the documentation of PerlIO (without
"Encode::"!) for further posibilities.
AUTHORS
Thomas Dorner
ATTRIBUTES
See attributes(5) for descriptions of the following
attributes:
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+---------------+------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+------------------+
|Availability | runtime/perl-512 |
+---------------+------------------+
|Stability | Uncommitted |
+---------------+------------------+
SEE ALSO
INSTALL, perlport.
Mailing list
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 [email protected].
See also:
http://lists.perl.org/showlist.cgi?name=perl-mvs
There are web archives of the mailing list at:
http://www.xray.mpe.mpg.de/mailing-lists/perl-mvs/
http://archive.develooper.com/[email protected]/
HISTORY
This document was originally written by Thomas Dorner for
the 5.005 release of Perl.
This document was podified for the 5.6 release of perl 11
July 2000.
NOTES
This software was built from source available at
https://java.net/projects/solaris-userland. The original
community source was downloaded from
http://www.cpan.org/src/5.0/perl-5.12.5.tar.bz2
Further information about this software can be found on the
open source community website at http://www.perl.org/.
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