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#!/usr/bin/perl -w
=head1 NAME
dh_strip - strip executables, shared libraries, and some static libraries
=cut
use strict;
use File::Find;
use Debian::Debhelper::Dh_Lib;
=head1 SYNOPSIS
B<dh_strip> [S<I<debhelper options>>] [B<-X>I<item>] [item]
=head1 DESCRIPTION
dh_strip is a debhelper program that is responsible for stripping
executables, shared libraries, and static libraries that are not used for
debugging.
It assumes that files that have names like lib*_g.a are static libraries
used in debugging, and will not strip them.
=head1 OPTIONS
=over 4
=item B<-X>I<item>, B<--exclude=>I<item>
Exclude files that contain "item" anywhere in their filename from being
stripped. You may use this option multiple times to build up a list of
things to exclude.
=back
=head1 NOTES
If the DEB_BUILD_OPTIONS environment variable contains "nostrip", nothing
will be stripped, in accordance with Debian policy.
=head1 CONFORMS TO
Debian policy, version 3.0.1
=cut
init();
# This variable can be used to turn off stripping (see Policy).
if (defined $ENV{DEB_BUILD_OPTIONS} && $ENV{DEB_BUILD_OPTIONS} =~ /nostrip/) {
exit;
}
# I could just use `file $_[0]`, but this is safer
sub get_file_type {
my $file=shift;
open (FILE, '-|') # handle all filenames safely
|| exec('file', $file)
|| die "can't exec file: $!";
my $type=<FILE>;
close FILE;
return $type;
}
# Check if a file is an elf binary, shared library, or static library,
# for use by File::Find. It'll fill the following 3 arrays with anything
# it finds:
my (@shared_libs, @executables, @static_libs);
sub testfile {
return if -l $_ or -d $_; # Skip directories and symlinks always.
# See if we were asked to exclude this file.
# Note that we have to test on the full filename, including directory.
my $fn="$File::Find::dir/$_";
foreach my $f (@{$dh{EXCLUDE}}) {
return if ($fn=~m/\Q$f\E/);
}
# Does its filename look like a shared library?
if (m/.*\.so.*?/) {
# Ok, do the expensive test.
my $type=get_file_type($_);
if ($type=~m/.*ELF.*shared.*/) {
push @shared_libs, $fn;
return;
}
}
# Is it executable? -x isn't good enough, so we need to use stat.
my (undef,undef,$mode,undef)=stat(_);
if ($mode & 0111) {
# Ok, expensive test.
my $type=get_file_type($_);
if ($type=~m/.*ELF.*(executable|shared).*/) {
push @executables, $fn;
return;
}
}
# Is it a static library, and not a debug library?
if (m/lib.*\.a$/ && ! m/.*_g\.a$/) {
push @static_libs, $fn;
return;
}
}
foreach my $package (@{$dh{DOPACKAGES}}) {
my $tmp=tmpdir($package);
find(\&testfile,$tmp);
foreach (@shared_libs) {
# Note that all calls to strip on shared libs
# *must* inclde the --strip-unneeded.
doit("strip","--remove-section=.comment",
"--remove-section=.note","--strip-unneeded",$_);
}
foreach (@executables) {
doit("strip","--remove-section=.comment",
"--remove-section=.note",$_);
}
foreach (@static_libs) {
doit("strip","--strip-debug",$_);
}
}
=head1 SEE ALSO
L<debhelper(1)>
This program is a part of debhelper.
=head1 AUTHOR
Joey Hess <joeyh@debian.org>
=cut
|
