1# $OpenBSD: Util.pm,v 1.5 2012/07/10 12:24:45 espie Exp $ 2 3# Copyright (c) 2007-2010 Steven Mestdagh <steven@openbsd.org> 4# Copyright (c) 2012 Marc Espie <espie@openbsd.org> 5# 6# Permission to use, copy, modify, and distribute this software for any 7# purpose with or without fee is hereby granted, provided that the above 8# copyright notice and this permission notice appear in all copies. 9# 10# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 18use strict; 19use warnings; 20package LT::Util; 21require Exporter; 22our @ISA = qw(Exporter); 23our @EXPORT = qw(reverse_zap_duplicates_ref abs_dir $ltdir $version shortdie); 24use File::Basename; 25use Cwd; 26 27our $ltdir = '.libs'; 28our $version = '1.5.26'; # pretend to be this version of libtool 29 30# walk a list from back to front, removing any duplicates 31# this should make sure a library's dependencies are behind the library itself 32sub reverse_zap_duplicates_ref 33{ 34 my $arglist = shift; 35 my $h = {}; 36 my $r = []; 37 for my $el (reverse @$arglist) { 38 next if defined $h->{$el}; 39 unshift @$r, $el; 40 $h->{$el} = 1; 41 } 42 return $r; 43} 44 45sub abs_dir 46{ 47 my $a = shift; 48 return dirname(Cwd::abs_path($a)); 49} 50 51sub shortdie 52{ 53 $SIG{__DIE__} = 'DEFAULT'; 54 die @_; 55} 56 571; 58