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# $Id: CheckLib.pm,v 1.25 2008/10/27 12:16:23 drhyde Exp $

package #
Devel::CheckLib;

use 5.00405; #postfix foreach
use strict;
use vars qw($VERSION @ISA @EXPORT);
$VERSION = '1.09';
use Config qw(%Config);
use Text::ParseWords 'quotewords';

use File::Spec;
use File::Temp;

require Exporter;
@ISA = qw(Exporter);
@EXPORT = qw(assert_lib check_lib_or_exit check_lib);

# localising prevents the warningness leaking out of this module
local $^W = 1;    # use warnings is a 5.6-ism

_findcc(); # bomb out early if there's no compiler

=head1 NAME

Devel::CheckLib - check that a library is available

=head1 DESCRIPTION

Devel::CheckLib is a perl module that checks whether a particular C
library and its headers are available.

=head1 SYNOPSIS

    use Devel::CheckLib;

    check_lib_or_exit( lib => 'jpeg', header => 'jpeglib.h' );
    check_lib_or_exit( lib => [ 'iconv', 'jpeg' ] );
  
    # or prompt for path to library and then do this:
    check_lib_or_exit( lib => 'jpeg', libpath => $additional_path );

=head1 USING IT IN Makefile.PL or Build.PL

If you want to use this from Makefile.PL or Build.PL, do
not simply copy the module into your distribution as this may cause
problems when PAUSE and search.cpan.org index the distro.  Instead, use
the use-devel-checklib script.

=head1 HOW IT WORKS

You pass named parameters to a function, describing to it how to build
and link to the libraries.

It works by trying to compile some code - which defaults to this:

    int main(int argc, char *argv[]) { return 0; }

and linking it to the specified libraries.  If something pops out the end
which looks executable, it gets executed, and if main() returns 0 we know
that it worked.  That tiny program is
built once for each library that you specify, and (without linking) once
for each header file.

If you want to check for the presence of particular functions in a