Test case for #10433/#10424.
[p5sagit/p5-mst-13.2.git] / README.bs2000
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c2e66d9e 1This document is written in pod format hence there are punctuation
2characters in in odd places. Do not worry, you've apparently got the
3ASCII->EBCDIC translation worked out correctly. You can read more
4about pod in pod/perlpod.pod or the short summary in the INSTALL file.
5
6=head1 NAME
7
453189b6 8README.BS2000 - building and installing Perl for BS2000.
c2e66d9e 9
10=head1 SYNOPSIS
11
12This document will help you Configure, build, test and install Perl
13on BS2000 in the POSIX subsystem.
14
15=head1 DESCRIPTION
16
17This is a ported perl for the POSIX subsystem in BS2000 VERSION OSD
453189b6 18V3.1A or later. It may work on other versions, but we started porting
19and testing it with 3.1A and are currently using Version V4.0A.
a1a0e61e 20
21You may need the following GNU programs in order to install perl:
22
c2e66d9e 23=head2 gzip
a1a0e61e 24
25We used version 1.2.4, which could be installed out of the box with
26one failure during 'make check'.
27
c2e66d9e 28=head2 bison
a1a0e61e 29
30The yacc coming with BS2000 POSIX didn't work for us. So we had to
31use bison. We had to make a few changes to perl in order to use the
32pure (reentrant) parser of bison. We used version 1.25, but we had to
453189b6 33add a few changes due to EBCDIC. See below for more details
34concerning yacc.
a1a0e61e 35
c2e66d9e 36=head2 Unpacking
a1a0e61e 37
38To extract an ASCII tar archive on BS2000 POSIX you need an ASCII
39filesystem (we used the mountpoint /usr/local/ascii for this). Now
c2e66d9e 40you extract the archive in the ASCII filesystem without
41I/O-conversion:
a1a0e61e 42
43cd /usr/local/ascii
44export IO_CONVERSION=NO
45gunzip < /usr/local/src/perl.tar.gz | pax -r
46
47You may ignore the error message for the first element of the archive
48(this doesn't look like a tar archive / skipping to next file...),
c2e66d9e 49it's only the directory which will be created automatically anyway.
a1a0e61e 50
51After extracting the archive you copy the whole directory tree to your
c2e66d9e 52EBCDIC filesystem. B<This time you use I/O-conversion>:
a1a0e61e 53
54cd /usr/local/src
55IO_CONVERSION=YES
56cp -r /usr/local/ascii/perl5.005_02 ./
57
c2e66d9e 58=head2 Compiling
a1a0e61e 59
453189b6 60There is a "hints" file for BS2000 called hints.posix-bc (because
61posix-bc is the OS name given by `uname`) that specifies the correct
62values for most things. The major problem is (of course) the EBCDIC
63character set. We have german EBCDIC version.
a1a0e61e 64
65Because of our problems with the native yacc we used GNU bison to
93fb2ac3 66generate a pure (=reentrant) parser for perly.y. So our yacc is
67really the following script:
a1a0e61e 68
93fb2ac3 69-----8<-----/usr/local/bin/yacc-----8<-----
70#! /usr/bin/sh
a1a0e61e 71
93fb2ac3 72# Bison as a reentrant yacc:
73
74# save parameters:
75params=""
76while [[ $# -gt 1 ]]; do
77 params="$params $1"
78 shift
79done
80
81# add flag %pure_parser:
82
83tmpfile=/tmp/bison.$$.y
84echo %pure_parser > $tmpfile
85cat $1 >> $tmpfile
86
87# call bison:
88
89echo "/usr/local/bin/bison --yacc $params $1\t\t\t(Pure Parser)"
90/usr/local/bin/bison --yacc $params $tmpfile
91
92# cleanup:
93
94rm -f $tmpfile
95-----8<----------8<-----
96
97We still use the normal yacc for a2p.y though!!! We made a softlink
98called byacc to distinguish between the two versions:
99
100ln -s /usr/bin/yacc /usr/local/bin/byacc
a1a0e61e 101
c2e66d9e 102We build perl using GNU make. We tried the native make once and it
103worked too.
a1a0e61e 104
c2e66d9e 105=head2 Testing
a1a0e61e 106
c2e66d9e 107We still got a few errors during C<make test>. Some of them are the
108result of using bison. Bison prints I<parser error> instead of I<syntax
109error>, so we may ignore them. The following list shows
a1a0e61e 110our errors, your results may differ:
111
c8e8bf6a 112op/numconvert.......FAILED tests 1409-1440
113op/regexp...........FAILED tests 483, 496
114op/regexp_noamp.....FAILED tests 483, 496
a1a0e61e 115pragma/overload.....FAILED tests 152-153, 170-171
c8e8bf6a 116pragma/warnings.....FAILED tests 14, 82, 129, 155, 192, 205, 207
117lib/bigfloat........FAILED tests 351-352, 355
118lib/bigfltpm........FAILED tests 354-355, 358
119lib/complex.........FAILED tests 267, 487
120lib/dumper..........FAILED tests 43, 45
121Failed 11/231 test scripts, 95.24% okay. 57/10595 subtests failed, 99.46% okay.
a1a0e61e 122
c2e66d9e 123=head2 Install
a1a0e61e 124
125We have no nroff on BS2000 POSIX (yet), so we ignored any errors while
126installing the documentation.
127
128
453189b6 129=head2 Using Perl in the Posix-Shell
a1a0e61e 130
131BS2000 POSIX doesn't support the shebang notation
c2e66d9e 132(C<#!/usr/local/bin/perl>), so you have to use the following lines
a1a0e61e 133instead:
134
135: # use perl
136 eval 'exec /usr/local/bin/perl -S $0 ${1+"$@"}'
137 if $running_under_some_shell;
c2e66d9e 138
453189b6 139=head2 Using Perl in "native" BS2000
140
141We don't have much experience with this yet, but try the following:
142
143Copy your Perl executable to a BS2000 LLM using bs2cp:
144
145C<bs2cp /usr/local/bin/perl 'bs2:perl(perl,l)'>
146
147Now you can start it with the following (SDF) command:
148
149C</START-PROG FROM-FILE=*MODULE(PERL,PERL),PROG-MODE=*ANY,RUN-MODE=*ADV>
150
151First you get the BS2000 commandline prompt ('*'). Here you may enter
152your parameters, e.g. C<-e 'print "Hello World!\\n";'> (note the
153double backslash!) or C<-w> and the name of your Perl script.
154Filenames starting with C</> are searched in in the Posix filesystem,
155others are searched in the BS2000 filesystem. You may even use
156wildcards if you put a C<%> in front of your filename (e.g. C<-w
157checkfiles.pl %*.c>). Read your C/C++ manual for additional
158possibilities of the commandline prompt (look for
159PARAMETER-PROMPTING).
160
35a77668 161=head2 Floating point anomalies
162
163There appears to be a bug in the floating point implementation on BS2000 POSIX
164systems such that calling int() on the product of a number and a small
165magnitude number is not the same as calling int() on the quotient of
166that number and a large magnitude number. For example, in the following
167Perl code:
168
169 my $x = 100000.0;
170 my $y = int($x * 1e-5) * 1e5; # '0'
171 my $z = int($x / 1e+5) * 1e5; # '100000'
172 print "\$y is $y and \$z is $z\n"; # $y is 0 and $z is 100000
173
174Although one would expect the quantities $y and $z to be the same and equal
175to 100000 they will differ and instead will be 0 and 100000 respectively.
176
c2e66d9e 177=head1 AUTHORS
178
179Thomas Dorner
180
181=head1 SEE ALSO
182
183L<INSTALL>, L<perlport>.
184
185=head2 Mailing list
186
187The Perl Institute (http://www.perl.org/) maintains a perl-mvs mailing
188list of interest to all folks building and/or using perl on EBCDIC
22103e7e 189platforms. To subscribe, send a message of:
c2e66d9e 190
191 subscribe perl-mvs
192
193to majordomo@perl.org.
194
195=head1 HISTORY
196
197This document was originally written by Thomas Dorner for the 5.005
198release of Perl.
199
200This document was podified for the 5.6 release of perl 11 July 2000.
201
202=cut