diff options
Diffstat (limited to 'chromium/third_party/cygwin/lib/perl5/5.10/pods/perlbs2000.pod')
| -rw-r--r-- | chromium/third_party/cygwin/lib/perl5/5.10/pods/perlbs2000.pod | 241 |
1 files changed, 0 insertions, 241 deletions
diff --git a/chromium/third_party/cygwin/lib/perl5/5.10/pods/perlbs2000.pod b/chromium/third_party/cygwin/lib/perl5/5.10/pods/perlbs2000.pod deleted file mode 100644 index a7746c64e2b..00000000000 --- a/chromium/third_party/cygwin/lib/perl5/5.10/pods/perlbs2000.pod +++ /dev/null @@ -1,241 +0,0 @@ -This document is written in pod format hence there are punctuation -characters 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.BS2000 - building and installing Perl for BS2000. - -=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 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: - -=head2 gzip on BS2000 - -We used version 1.2.4, which could be installed out of the box with -one failure during 'make check'. - -=head2 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. - -=head2 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. 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 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 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 Perl on BS2000 - -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 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<bs2cp /usr/local/bin/perl 'bs2:perl(perl,l)'> - -Now you can start it with the following (SDF) command: - -C</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. 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<Encode::>!) -for further posibilities. - -=head1 AUTHORS - -Thomas Dorner - -=head1 SEE ALSO - -L<INSTALL>, L<perlport>. - -=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/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/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 |