1 files changed, 86 insertions, 0 deletions
diff --git a/check_elf_files b/check_elf_files
new file mode 100755
index 0000000..52c8161
--- /dev/null
+++ b/check_elf_files
@@ -0,0 +1,86 @@
+#!/usr/bin/perl
+# $Id$
+# 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;
+    }
+}