FM / 5.34.0

/usr/lib/x86_64-linux-gnu/perl/5.34.0/

/usr/lib/x86_64-linux-gnu/perl/5.34.0

Name	Size	Mode	Actions
asm/	-	0755	rm
asm-generic/	-	0755	rm
auto/	-	0755	rm
B/	-	0755	rm
bits/	-	0755	rm
Compress/	-	0755	rm
CORE/	-	0755	rm
Data/	-	0755	rm
Devel/	-	0755	rm
Digest/	-	0755	rm
Encode/	-	0755	rm
File/	-	0755	rm
Filter/	-	0755	rm
gnu/	-	0755	rm
Hash/	-	0755	rm
I18N/	-	0755	rm
IO/	-	0755	rm
IPC/	-	0755	rm
linux/	-	0755	rm
List/	-	0755	rm
machine/	-	0755	rm
Math/	-	0755	rm
MIME/	-	0755	rm
PerlIO/	-	0755	rm
Scalar/	-	0755	rm
Sub/	-	0755	rm
Sys/	-	0755	rm
sys/	-	0755	rm
threads/	-	0755	rm
Time/	-	0755	rm
Unicode/	-	0755	rm
attributes.pm	16353	0644	edit dl rm
B.pm	30093	0644	edit dl rm
Config.pm	3217	0644	edit dl rm
Config.pod	256066	0644	edit dl rm
Config_git.pl	409	0644	edit dl rm
Config_heavy.pl	55332	0644	edit dl rm
Cwd.pm	21942	0644	edit dl rm
DB_File.pm	67004	0644	edit dl rm
DynaLoader.pm	25243	0644	edit dl rm
Encode.pm	32085	0644	edit dl rm
encoding.pm	22950	0644	edit dl rm
endian.ph	3627	0644	edit dl rm
errno.ph	23	0644	edit dl rm
Errno.pm	6586	0644	edit dl rm
Fcntl.pm	4044	0644	edit dl rm
features-time64.ph	811	0644	edit dl rm
features.ph	14995	0644	edit dl rm
GDBM_File.pm	7788	0644	edit dl rm
IO.pm	1462	0644	edit dl rm
lib.pm	6136	0644	edit dl rm
mro.pm	9846	0644	edit dl rm
NDBM_File.pm	3084	0644	edit dl rm
O.pm	4291	0644	edit dl rm
ODBM_File.pm	2970	0644	edit dl rm
Opcode.pm	16282	0644	edit dl rm
ops.pm	997	0644	edit dl rm
POSIX.pm	20384	0644	edit dl rm
POSIX.pod	82515	0644	edit dl rm
re.pm	28657	0644	edit dl rm
SDBM_File.pm	3809	0644	edit dl rm
signal.ph	3700	0644	edit dl rm
Socket.pm	37027	0644	edit dl rm
stdarg.ph	2870	0644	edit dl rm
stdc-predef.ph	1220	0644	edit dl rm
stddef.ph	11925	0644	edit dl rm
Storable.pm	49923	0644	edit dl rm
syscall.ph	86	0644	edit dl rm
sysexits.ph	1286	0644	edit dl rm
syslimits.ph	452	0644	edit dl rm
syslog.ph	85	0644	edit dl rm
threads.pm	37951	0644	edit dl rm
unistd.ph	10358	0644	edit dl rm
wait.ph	83	0644	edit dl rm
_h2ph_pre.ph	31302	0644	edit dl rm

Edit: /usr/lib/x86_64-linux-gnu/perl/5.34.0/O.pm (4291B)

package O;

our $VERSION = '1.03';

use B ();

our $BEGIN_output;
our $saveout_fh;

sub import {
    my ($class, @options) = @_;
    my ($quiet, $veryquiet) = (0, 0);
    if ($options[0] eq '-q' || $options[0] eq '-qq') {
	$quiet = 1;
	open ($saveout_fh, ">&", STDOUT);
	close STDOUT;
	open (STDOUT, ">", \$O::BEGIN_output);
	if ($options[0] eq '-qq') {
	    $veryquiet = 1;
	}
	shift @options;
    }
    my $backend = shift (@options);
    eval q[
	BEGIN {
	    B::minus_c;
	    B::save_BEGINs;
	}

CHECK {
	    if ($quiet) {
		close STDOUT;
		open (STDOUT, ">&", $saveout_fh);
		close $saveout_fh;
	    }

# Note: if you change the code after this 'use', please
	    # change the fudge factors in B::Concise (grep for
	    # "fragile kludge") so that its output still looks
	    # nice. Thanks. --smcc
	    use B::].$backend.q[ ();

my $compilesub = &{"B::${backend}::compile"}(@options);
	    if (ref($compilesub) ne "CODE") {
		die $compilesub;
	    }

local $savebackslash = $\;
	    local ($\,$",$,) = (undef,' ','');
	    &$compilesub();

close STDERR if $veryquiet;
	}
    ];
    if ($@) {
        my $msg = "$@";
        require Carp;
        Carp::croak("Loading compiler backend 'B::$backend' failed: $msg");
    }
}

__END__

=head1 NAME

O - Generic interface to Perl Compiler backends

=head1 SYNOPSIS

perl -MO=[-q,]Backend[,OPTIONS] foo.pl

=head1 DESCRIPTION

This is the module that is used as a frontend to the Perl Compiler.

If you pass the C<-q> option to the module, then the STDOUT
filehandle will be redirected into the variable C<$O::BEGIN_output>
during compilation.  This has the effect that any output printed
to STDOUT by BEGIN blocks or use'd modules will be stored in this
variable rather than printed. It's useful with those backends which
produce output themselves (C<Deparse>, C<Concise> etc), so that
their output is not confused with that generated by the code
being compiled.

The C<-qq> option behaves like C<-q>, except that it also closes
STDERR after deparsing has finished. This suppresses the "Syntax OK"
message normally produced by perl.

=head1 CONVENTIONS

Most compiler backends use the following conventions: OPTIONS
consists of a comma-separated list of words (no white-space).
The C<-v> option usually puts the backend into verbose mode.
The C<-ofile> option generates output to B<file> instead of
stdout. The C<-D> option followed by various letters turns on
various internal debugging flags. See the documentation for the
desired backend (named C<B::Backend> for the example above) to
find out about that backend.

=head1 IMPLEMENTATION

This section is only necessary for those who want to write a
compiler backend module that can be used via this module.

The command-line mentioned in the SYNOPSIS section corresponds to
the Perl code

use O ("Backend", OPTIONS);

The C<O::import> function loads the appropriate C<B::Backend> module
and calls its C<compile> function, passing it OPTIONS. That function
is expected to return a sub reference which we'll call CALLBACK. Next,
the "compile-only" flag is switched on (equivalent to the command-line
option C<-c>) and a CHECK block is registered which calls
CALLBACK. Thus the main Perl program mentioned on the command-line is
read in, parsed and compiled into internal syntax tree form. Since the
C<-c> flag is set, the program does not start running (excepting BEGIN
blocks of course) but the CALLBACK function registered by the compiler
backend is called.

In summary, a compiler backend module should be called "B::Foo"
for some foo and live in the appropriate directory for that name.
It should define a function called C<compile>. When the user types

perl -MO=Foo,OPTIONS foo.pl

that function is called and is passed those OPTIONS (split on
commas). It should return a sub ref to the main compilation function.
After the user's program is loaded and parsed, that returned sub ref
is invoked which can then go ahead and do the compilation, usually by
making use of the C<B> module's functionality.

=head1 BUGS

The C<-q> and C<-qq> options don't work correctly if perl isn't
compiled with PerlIO support : STDOUT will be closed instead of being
redirected to C<$O::BEGIN_output>.

=head1 AUTHOR

Malcolm Beattie, C<mbeattie@sable.ox.ac.uk>

=cut

cmd: