grep: Support for the -P option is not compiled into this --disable-perl-regexp binar

[keenlearner]

How can I get the -P option to work in grep program ?

-P, --perl-regexp
Interpret PATTERN as a Perl regular expression. This is highly experimental and grep -P may warn of unimplemented features.

I got error when trying to use it, clearly it's not implemented

grep: Support for the -P option is not compiled into this --disable-perl-regexp binary

Thank you,

[pauper]

sudo apt-get install pcregrep

"Perl-style regexps have many useful features that the standard POSIX ones
don't; this is basically the same as grep but with the different
regexp syntax."

[keenlearner]

After
sudo apt-get install pcregrep

grep: Support for the -P option is not compiled into this --disable-perl-regexp binary

Do I have to recompile on grep ?


I love perl regexp, because I am more familiar with it, besides that it's the most powerful regular expression that I have ever use so far. Thanks

[pauper]

No, it's a different package, see "man pcre".
Check out this link and that one.