Mass Deface
$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.
=head2 Testing Perl on BS2000
We still got a few errors during C. Some of them are the
result of using bison. Bison prints I instead of I, 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
lib/dumper..........FAILED tests 43, 45
Failed 11/231 test scripts, 95.24% okay. 57/10595 subtests failed, 99.46% okay.
=head2 Installing Perl on BS2000
We have no nroff on BS2000 POSIX (yet), so we ignored any errors while
installing the documentation.
=head2 Using Perl in the Posix-Shell of BS2000
BS2000 POSIX doesn't support the shebang notation
(C<#!/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;
=head2 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:
C
Now you can start it with the following (SDF) command:
C
First you get the BS2000 commandline prompt ('*'). Here you may enter
your parameters, e.g. C<-e 'print "Hello World!\\n";'> (note the
double backslash!) or C<-w> and the name of your Perl script.
Filenames starting with C are searched in the Posix filesystem,
others are searched in the BS2000 filesystem. You may even use
wildcards if you put a C<%> in front of your filename (e.g. C<-w
checkfiles.pl %*.c>). Read your C/C++ manual for additional
possibilities of the commandline prompt (look for
PARAMETER-PROMPTING).
=head2 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
Although one would expect the quantities $y and $z to be the same and equal
to 100000 they will differ and instead will be 0 and 100000 respectively.
=head2 Using PerlIO and different encodings on ASCII and EBCDIC partitions
Since version 5.8 Perl uses the new PerlIO on BS2000. This enables
you using different encodings per IO channel. For example you may use
use Encode;
open($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 C!)
for further possibilities.
=head1 AUTHORS
Thomas Dorner
=head1 SEE ALSO
L, L.
=head2 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 perl-mvs-subscribe@perl.org.
See also:
http://lists.perl.org/list/perl-mvs.html
There are web archives of the mailing list at:
http://www.xray.mpe.mpg.de/mailing-lists/perl-mvs/
http://archive.develooper.com/perl-mvs@perl.org/
=head1 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.
=cut