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authorJarkko Hietaniemi <jhi@iki.fi>2001-02-09 15:11:13 +0000
committerJarkko Hietaniemi <jhi@iki.fi>2001-02-09 15:11:13 +0000
commitdc5c060f96a5de06c9e1797503c70e8155e23e3e (patch)
tree1911ed2aa44096e17514f398c3e4de725a551b8f /README.posix-bc
parent0f5a2e590c3bb0e4ece26f74eeb3121063d229ad (diff)
downloadperl-dc5c060f96a5de06c9e1797503c70e8155e23e3e.tar.gz
Rename README.posix-bc to README.bs2000 to avoid confusion
when people think that perlposix-bc.pod tells anything about Perl and POSIX. Regen toc. p4raw-id: //depot/perl@8730
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-This document is written in pod format hence there are punctuation
-characters in in odd places. Do not worry, you've apparently got the
-ASCII->EBCDIC translation worked out correctly. You can read more
-about pod in pod/perlpod.pod or the short summary in the INSTALL file.
-
-=head1 NAME
-
-README.posix-bc - building and installing Perl for BS2000 POSIX.
-
-=head1 SYNOPSIS
-
-This document will help you Configure, build, test and install Perl
-on BS2000 in the POSIX subsystem.
-
-=head1 DESCRIPTION
-
-This is a ported perl for the POSIX subsystem in BS2000 VERSION OSD
-V3.1A. It may work on other versions, but that's the one we've tested
-it on.
-
-You may need the following GNU programs in order to install perl:
-
-=head2 gzip
-
-We used version 1.2.4, which could be installed out of the box with
-one failure during 'make check'.
-
-=head2 bison
-
-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.
-
-=head2 Unpacking
-
-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. B<This time you use I/O-conversion>:
-
-cd /usr/local/src
-IO_CONVERSION=YES
-cp -r /usr/local/ascii/perl5.005_02 ./
-
-=head2 Compiling
-
-There is a "hints" file for posix-bc that specifies the correct values
-for most things. The major 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.
-
-=head2 Testing
-
-We still got a few errors during C<make test>. Some of them are the
-result of using bison. Bison prints I<parser error> instead of I<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
-lib/dumper..........FAILED tests 43, 45
-Failed 11/231 test scripts, 95.24% okay. 57/10595 subtests failed, 99.46% okay.
-
-=head2 Install
-
-We have no nroff on BS2000 POSIX (yet), so we ignored any errors while
-installing the documentation.
-
-
-=head2 Using Perl
-
-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 Floating point anomalies
-
-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.
-
-=head1 AUTHORS
-
-Thomas Dorner
-
-=head1 SEE ALSO
-
-L<INSTALL>, L<perlport>.
-
-=head2 Mailing list
-
-The Perl Institute (http://www.perl.org/) maintains a perl-mvs mailing
-list of interest to all folks building and/or using perl on EBCDIC
-platforms. To subscribe, send a message of:
-
- subscribe perl-mvs
-
-to majordomo@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