#directorys
root_dir=G:/programmierung/perl/ager
data_dir=data/
images_dir=images/

#design & style

button_color=
[...]

sub load_config {
  my @args = qw/root_dir data_dir images_dir button_color alternatecolor_first alternatecolor_second marked_color/;

  open(CONF, "<depot_conf.conf") or die("Can't open depot_conf.conf: $!");
    for (<CONF>) {
      next if ( (/^#/) || (/^\W/) ); #ignore comments
      chomp;
      my @parts = split(/=/, $_);
      my ($var, $value) = @parts;
      
      for my $option ($#args) {       
        if ($var eq "$option") {
          __GUI__ $config{$var} = $value;
          last;
        }     
          print "$var:" . __PACKAGE__ . "$config{$var}\n";  
      }
    }
  close CONF;
}

package GUI;
use strict;

sub start {
  use Depot::manipulate;

  our %config = ();
  &manipulate::load_config();
}
1;

G:\programmierung\perl\lager>perl lager.txt
Global symbol "%config" requires explicit package name at Depot/manipulate.pm li
ne 16.
syntax error at Depot/manipulate.pm line 16, near "$config{"
Global symbol "%config" requires explicit package name at Depot/manipulate.pm li
ne 19.
syntax error at Depot/manipulate.pm line 23, near "}"
Compilation failed in require at Depot/GUI.pm line 5.
BEGIN failed--compilation aborted at Depot/GUI.pm line 5.
Compilation failed in require at lager.txt line 6.
BEGIN failed--compilation aborted at lager.txt line 6.