1 This document is written in pod format hence there are punctuation
2 characters in in odd places. Do not worry, you've apparently got the
3 ASCII->EBCDIC translation worked out correctly. You can read more
4 about pod in pod/perlpod.pod or the short summary in the INSTALL file.
8 README.BS2000 - building and installing Perl for BS2000.
12 This document will help you Configure, build, test and install Perl
13 on BS2000 in the POSIX subsystem.
17 This is a ported perl for the POSIX subsystem in BS2000 VERSION OSD
18 V3.1A or later. It may work on other versions, but we started porting
19 and testing it with 3.1A and are currently using Version V4.0A.
21 You may need the following GNU programs in order to install perl:
25 We used version 1.2.4, which could be installed out of the box with
26 one failure during 'make check'.
28 =head2 bison on BS2000
30 The yacc coming with BS2000 POSIX didn't work for us. So we had to
31 use bison. We had to make a few changes to perl in order to use the
32 pure (reentrant) parser of bison. We used version 1.25, but we had to
33 add a few changes due to EBCDIC. See below for more details
36 =head2 Unpacking Perl Distribution on BS2000
38 To extract an ASCII tar archive on BS2000 POSIX you need an ASCII
39 filesystem (we used the mountpoint /usr/local/ascii for this). Now
40 you extract the archive in the ASCII filesystem without
44 export IO_CONVERSION=NO
45 gunzip < /usr/local/src/perl.tar.gz | pax -r
47 You 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...),
49 it's only the directory which will be created automatically anyway.
51 After extracting the archive you copy the whole directory tree to your
52 EBCDIC filesystem. B<This time you use I/O-conversion>:
56 cp -r /usr/local/ascii/perl5.005_02 ./
58 =head2 Compiling Perl on BS2000
60 There is a "hints" file for BS2000 called hints.posix-bc (because
61 posix-bc is the OS name given by `uname`) that specifies the correct
62 values for most things. The major problem is (of course) the EBCDIC
63 character set. We have german EBCDIC version.
65 Because of our problems with the native yacc we used GNU bison to
66 generate a pure (=reentrant) parser for perly.y. So our yacc is
67 really the following script:
69 -----8<-----/usr/local/bin/yacc-----8<-----
72 # Bison as a reentrant yacc:
76 while [[ $# -gt 1 ]]; do
81 # add flag %pure_parser:
83 tmpfile=/tmp/bison.$$.y
84 echo %pure_parser > $tmpfile
89 echo "/usr/local/bin/bison --yacc $params $1\t\t\t(Pure Parser)"
90 /usr/local/bin/bison --yacc $params $tmpfile
95 -----8<----------8<-----
97 We still use the normal yacc for a2p.y though!!! We made a softlink
98 called byacc to distinguish between the two versions:
100 ln -s /usr/bin/yacc /usr/local/bin/byacc
102 We build perl using GNU make. We tried the native make once and it
105 =head2 Testing Perl on BS2000
107 We still got a few errors during C<make test>. Some of them are the
108 result of using bison. Bison prints I<parser error> instead of I<syntax
109 error>, so we may ignore them. The following list shows
110 our errors, your results may differ:
112 op/numconvert.......FAILED tests 1409-1440
113 op/regexp...........FAILED tests 483, 496
114 op/regexp_noamp.....FAILED tests 483, 496
115 pragma/overload.....FAILED tests 152-153, 170-171
116 pragma/warnings.....FAILED tests 14, 82, 129, 155, 192, 205, 207
117 lib/bigfloat........FAILED tests 351-352, 355
118 lib/bigfltpm........FAILED tests 354-355, 358
119 lib/complex.........FAILED tests 267, 487
120 lib/dumper..........FAILED tests 43, 45
121 Failed 11/231 test scripts, 95.24% okay. 57/10595 subtests failed, 99.46% okay.
123 =head2 Installing Perl on BS2000
125 We have no nroff on BS2000 POSIX (yet), so we ignored any errors while
126 installing the documentation.
129 =head2 Using Perl in the Posix-Shell of BS2000
131 BS2000 POSIX doesn't support the shebang notation
132 (C<#!/usr/local/bin/perl>), so you have to use the following lines
136 eval 'exec /usr/local/bin/perl -S $0 ${1+"$@"}'
137 if $running_under_some_shell;
139 =head2 Using Perl in "native" BS2000
141 We don't have much experience with this yet, but try the following:
143 Copy your Perl executable to a BS2000 LLM using bs2cp:
145 C<bs2cp /usr/local/bin/perl 'bs2:perl(perl,l)'>
147 Now you can start it with the following (SDF) command:
149 C</START-PROG FROM-FILE=*MODULE(PERL,PERL),PROG-MODE=*ANY,RUN-MODE=*ADV>
151 First you get the BS2000 commandline prompt ('*'). Here you may enter
152 your parameters, e.g. C<-e 'print "Hello World!\\n";'> (note the
153 double backslash!) or C<-w> and the name of your Perl script.
154 Filenames starting with C</> are searched in in the Posix filesystem,
155 others are searched in the BS2000 filesystem. You may even use
156 wildcards if you put a C<%> in front of your filename (e.g. C<-w
157 checkfiles.pl %*.c>). Read your C/C++ manual for additional
158 possibilities of the commandline prompt (look for
159 PARAMETER-PROMPTING).
161 =head2 Floating point anomalies on BS2000
163 There appears to be a bug in the floating point implementation on BS2000 POSIX
164 systems such that calling int() on the product of a number and a small
165 magnitude number is not the same as calling int() on the quotient of
166 that number and a large magnitude number. For example, in the following
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
174 Although one would expect the quantities $y and $z to be the same and equal
175 to 100000 they will differ and instead will be 0 and 100000 respectively.
183 L<INSTALL>, L<perlport>.
187 The Perl Institute (http://www.perl.org/) maintains a perl-mvs mailing
188 list of interest to all folks building and/or using perl on EBCDIC
189 platforms. To subscribe, send a message of:
193 to majordomo@perl.org.
197 This document was originally written by Thomas Dorner for the 5.005
200 This document was podified for the 5.6 release of perl 11 July 2000.