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#!/usr/bin/perl
# $Id: check_elf_files 266655 2010-03-05 12:59:47Z peroyvind $
# Strip files
use strict;
use warnings;
use File::Find;
use File::Basename;
my $buildroot = $ENV{RPM_BUILD_ROOT};
die "No build root defined" unless $buildroot;
die "Invalid build root" unless -d $buildroot;
# normalize build root
$buildroot =~ s|/$||;
# set LIBRARY_PATH to check libraries in build root
my $lib = `rpm --eval %_lib`;
chomp $lib;
$ENV{LD_LIBRARY_PATH}="$buildroot/$lib:$buildroot/usr/$lib";
my (@shared_libs, @executables, @static_libs);
find(\&keep_wanted, $buildroot);
check_missing_or_unused_libs();
sub check_missing_or_unused_libs {
my $shift = length($buildroot);
foreach my $file (@shared_libs, @executables) {
my (undef, undef, @l) = `ldd -u -r $file 2>/dev/null`;
next unless @l;
my $file_ = substr($file, $shift);
print STDERR
"Warning: unused libraries in $file_: ",
join(' ', map { basename($_) } @l), "\n";
}
foreach my $file (@shared_libs) {
my @l = `ldd -r $file 2>&1 >/dev/null`;
next unless @l;
my $file_ = substr($file, $shift);
print STDERR
"Warning: undefined symbols in $file_: ",
join(' ', map { /undefined symbol: (\S+)/ ? $1 : () } @l), "\n";
}
}
# TODO: we should write a binding for libfile...
sub expensive_test {
my ($file) = @_;
my $type = `file -- $file`;
}
# 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:
sub keep_wanted() {
# skip everything but files
return unless -f $_;
# skip symlinks
return if -l $_;
return if $File::Find::dir =~ m!/usr/lib/debug($|/)!;
# Does its filename look like a shared library?
if (m/\.so/) {
# Ok, do the expensive test.
if (expensive_test($_) =~ m/ELF.*shared/) {
push @shared_libs, $File::Find::name;
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.
if (expensive_test($_) =~ m/ELF.*executable/) {
push @executables, $File::Find::name;
return;
}
}
# Is it a static library, and not a debug library?
if (m/lib.*\.a/ && ! m/_g\.a/) {
push @static_libs, $File::Find::name;
return;
}
}
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