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# $OpenBSD: Library.pm,v 1.10 2014/04/16 10:31:27 zhuk Exp $
# Copyright (c) 2007-2010 Steven Mestdagh <steven@openbsd.org>
# Copyright (c) 2012 Marc Espie <espie@openbsd.org>
#
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
use strict;
use warnings;
use feature qw(say switch state);
package LT::Library::Stash;
sub new
{
my $class = shift;
bless {}, $class;
}
sub create
{
my ($self, $key) = @_;
if (!exists $self->{$key}) {
$self->{$key} = LT::Library->new($key);
}
return $self->{$key};
}
package LT::Library;
use LT::Util;
use LT::Trace;
# find actual library filename
# XXX pick the right one if multiple are found!
sub resolve_library
{
my ($self, $dirs, $shared, $staticflag, $linkmode, $gp) = @_;
my $libtofind = $self->{key};
my $libfile = 0;
my @globbedlib;
my $pic = ''; # used when finding static libraries
if ($linkmode eq 'LT::LaFile') {
$pic = '_pic';
}
if (defined $self->{lafile}) {
require LT::LaFile;
# if there is a .la file, use the info from there
tsay {"found .la file $self->{lafile} for library key: ",
$self->{key}};
my $lainfo = LT::LaFile->parse($self->{lafile});
my $dlname = $lainfo->{dlname};
my $oldlib = $lainfo->{old_library};
my $libdir = $lainfo->{libdir};
my $installed = $lainfo->{installed};
my $d = abs_dir($self->{lafile});
# get the name we need (this may include a -release)
if (!$dlname && !$oldlib) {
die "Link error: neither static nor shared library found in $self->{lafile}\n";
}
if ($d !~ m/\Q$ltdir\E$/ && $installed eq 'no') {
$d .= "/$ltdir";
}
if ($shared) {
if ($dlname) {
$libfile = "$d/$dlname";
} else {
# fall back to static
$libfile = "$d/$oldlib";
}
# if -static has been passed, don't link dynamically
# against not-installed libraries
if ($staticflag && $installed eq 'no') {
$libfile = "$d/$oldlib";
}
} else {
$libfile = "$d/$oldlib";
}
if (! -f $libfile) {
tsay {".la file ", $self->{lafile},
"points to nonexistent file ", $libfile, " !"};
}
} else {
# search in .libs when priority is high
push @$dirs, $gp->libsearchdirs if $gp;
tsay {"searching for $libtofind"};
tsay {"search path= ", join(':', @$dirs)};
tsay {"search type= ", $shared ? 'shared' : 'static'};
foreach my $sd (@$dirs) {
if ($shared) {
# select correct library by sorting by version number only
my $bestlib = $self->findbest($sd, $libtofind);
if ($bestlib) {
tsay {"found $libtofind in $sd"};
$libfile = $bestlib;
last;
} else {
# XXX find static library instead?
my $spath = "$sd/lib$libtofind$pic.a";
if (-f $spath) {
tsay {"found static $libtofind in $sd"};
$libfile = $spath;
last;
}
}
} else {
# look for a static library
my $spath = "$sd/lib$libtofind.a";
if (-f $spath) {
tsay {"found static $libtofind in $sd"};
$libfile = $spath;
last;
}
}
}
}
if (!$libfile) {
delete $self->{fullpath};
if ($linkmode eq 'LT::LaFile') {
say "warning: dependency on $libtofind dropped";
$self->{dropped} = 1;
} elsif ($linkmode eq 'LT::Program') {
die "Link error: $libtofind not found!\n";
}
} else {
$self->{fullpath} = $libfile;
tsay {"\$libs->{$self->{key}}->{fullpath} = ",
$self->{fullpath}};
}
}
sub findbest
{
my ($self, $sd, $name) = @_;
my $best = undef;
if (opendir(my $dir, $sd)) {
my ($major, $minor) = (-1, -1);
while (my $e = readdir($dir)) {
next unless $e =~ m/^lib\Q$name\E\.so\.(\d+)\.(\d+)$/;
if ($1 > $major || ($1 == $major && $2 > $minor)) {
($major, $minor) = ($1, $2);
$best = "$sd/$e";
}
}
closedir($dir);
}
return $best;
}
# give a list of library dependencies found in the actual shared library
sub inspect
{
my $self = shift;
my $filename = $self->{fullpath};
my @deps;
if (!defined($filename)){
say "warning: library was specified that could not be found: $self->{key}";
return;
}
tsay {"inspecting $filename for library dependencies..."};
open(my $fh, '-|', "objdump", "-p", "--", $filename);
while (<$fh>) {
if (m/\s+NEEDED\s+(\S+)\s*$/) {
push @deps, $1;
}
}
tsay {"found ", (@deps == 0) ? 'no ' : '',
"deps for $filename\n@deps"};
return @deps;
}
sub new
{
my ($class, $key) = @_;
bless { key => $key }, $class;
}
1;
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