Config::Perl::V(3p) Perl Programmers Reference Guide Config::Perl::V(3p)

Config::Perl::V(3p) Perl Programmers Reference Guide Config::Perl::V(3p) #

Config::Perl::V(3p) Perl Programmers Reference Guide Config::Perl::V(3p)

NNAAMMEE #

 Config::Perl::V - Structured data retrieval of perl -V output

SSYYNNOOPPSSIISS #

  use Config::Perl::V;

  my $local_config = Config::Perl::V::myconfig ();
  print $local_config->{config}{osname};

DDEESSCCRRIIPPTTIIOONN #

$$ccoonnff == mmyyccoonnffiigg (()) This function will collect the data described in “The hash structure” below, and return that as a hash reference. It optionally accepts an option to include more entries from %ENV. See “environment” below.

 Note that this will not work on uninstalled perls when called with
 "-I/path/to/uninstalled/perl/lib", but it works when that path is in
 $PERL5LIB or in $PERL5OPT, as paths passed using "-I" are not known when
 the "-V" information is collected.

$$ccoonnff == ppllvv22hhaasshh (($$tteexxtt [[,, ......]])) Convert a sole ‘perl -V’ text block, or list of lines, to a complete myconfig hash. All unknown entries are defaulted.

$$iinnffoo == ssuummmmaarryy (([[$$ccoonnff]])) Return an arbitrary selection of the information. If no $conf is given, “myconfig ()” is used instead.

$$mmdd55 == ssiiggnnaattuurree (([[$$ccoonnff]])) Return the MD5 of the info returned by “summary ()” without the “config_args” entry.

 If "Digest::MD5" is not available, it return a string with only 0's.

TThhee hhaasshh ssttrruuccttuurree The returned hash consists of 4 parts:

 build
     This information is extracted from the second block that is emitted
     by "perl -V", and usually looks something like

      Characteristics of this binary (from libperl):
        Compile-time options: DEBUGGING USE_64_BIT_INT USE_LARGE_FILES
        Locally applied patches:
              defined-or

MAINT24637 #

        Built under linux
        Compiled at Jun 13 2005 10:44:20

@INC: #

          /usr/lib/perl5/5.8.7/i686-linux-64int
          /usr/lib/perl5/5.8.7
          /usr/lib/perl5/site_perl/5.8.7/i686-linux-64int
          /usr/lib/perl5/site_perl/5.8.7
          /usr/lib/perl5/site_perl
          .

     or

      Characteristics of this binary (from libperl):
        Compile-time options: DEBUGGING MULTIPLICITY

PERL_DONT_CREATE_GVSV PERL_IMPLICIT_CONTEXT #

PERL_MALLOC_WRAP PERL_TRACK_MEMPOOL #

PERL_USE_SAFE_PUTENV USE_ITHREADS #

USE_LARGE_FILES USE_PERLIO #

USE_REENTRANT_API #

        Built under linux
        Compiled at Jan 28 2009 15:26:59

     This information is not available anywhere else, including %Config,
     but it is the information that is only known to the perl binary.

     The extracted information is stored in 5 entries in the "build" hash:

     osname
         This is most likely the same as $Config{osname}, and was the name
         known when perl was built. It might be different if perl was
         cross-compiled.

         The default for this field, if it cannot be extracted, is to copy
         $Config{osname}. The two may be differing in casing (OpenBSD vs
         openbsd).

     stamp
         This is the time string for which the perl binary was compiled.
         The default value is 0.

     options
         This is a hash with all the known defines as keys. The value is
         either 0, which means unknown or unset, or 1, which means
         defined.

     derived
         As some variables are reported by a different name in the output
         of "perl -V" than their actual name in %Config, I decided to
         leave the "config" entry as close to reality as possible, and put
         in the entries that might have been guessed by the printed output
         in a separate block.

     patches
         This is a list of optionally locally applied patches. Default is
         an empty list.

 environment
     By default this hash is only filled with the environment variables
     out of %ENV that start with "PERL", but you can pass the "env" option
     to myconfig to get more

      my $conf = Config::Perl::V::myconfig ({ env => qr/^ORACLE/ });
      my $conf = Config::Perl::V::myconfig ([ env => qr/^ORACLE/ ]);

 config
     This hash is filled with the variables that "perl -V" fills its
     report with, and it has the same variables that "Config::myconfig"
     returns from %Config.

 inc This is the list of default @INC.

RREEAASSOONNIINNGG #

 This module was written to be able to return the configuration for the
 currently used perl as deeply as needed for the CPANTESTERS framework.
 Up until now they used the output of myconfig as a single text blob, and
 so it was missing the vital binary characteristics of the running perl
 and the optional applied patches.

BBUUGGSS #

 Please feedback what is wrong

TTOODDOO #

  * Implement retrieval functions/methods
  * Documentation
  * Error checking
  * Tests

AAUUTTHHOORR #

 H.Merijn Brand <h.m.brand@xs4all.nl>

CCOOPPYYRRIIGGHHTT AANNDD LLIICCEENNSSEE #

 Copyright (C) 2009-2020 H.Merijn Brand

 This library is free software; you can redistribute it and/or modify it
 under the same terms as Perl itself.

perl v5.36.3 2023-02-15 Config::Perl::V(3p)