Re: Perl bytecode

Can someone please explain the option usage:

perl -MO=Bytecode -e '...'
[download]

I've only used

perl -Mmodule -e ' ....'
[download]

"perl --help" doesn't mention this "-MO=". Incidentally, it seems most of the B modules are installed by default, what does "B" stand for?

Comment on Re: Perl bytecode Select or Download Code

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Re^2: Perl bytecode by chromatic (Archbishop) on Dec 06, 2005 at 19:48 UTC
`-MO` loads the O module, of course, which loads the `B::*` module listed after the equal sign. `B` stands for Backend.	[reply] [d/l] [select]
Re^2: Perl bytecode by Errto (Vicar) on Dec 07, 2005 at 04:27 UTC
As you know, -M is the command line equivalent of use. The equal sign specifies the arguments to pass to the import function. So `perl -MO=Bytecode` is the command line equivalent of `use O 'Bytecode';` in actual Perl. Likewise `perl -Mopen=:utf8,:std` is the equivalent of `use open qw(:utf8 :std);`.	[reply] [d/l] [select]