Add a tool to scan for dependencies on Windows

Similar to ldd on Linux.

Signed-off-by: Thiago Macieira <thiago@macieira.org>

scripts/win-ldd.pl

@@ -0,0 +1,69 @@
+#!perl
+use strict;
+my %deploy;
+my $objdump = $ENV{objdump} ? $ENV{objdump} : "i686-w64-mingw32-objdump";
+my @searchdirs;
+
+sub addDependenciesFor($) {
+    open OBJDUMP, "-|", $objdump, "-p", $_[0] or die;
+    while (<OBJDUMP>) {
+        last if /^The Import Tables/;
+    }
+    while (<OBJDUMP>) {
+        next unless /DLL Name: (.*)/;
+        $deploy{$1} = 0 unless defined($deploy{$1});
+        last if /^\w/;
+    }
+    close OBJDUMP;
+}
+
+sub findMissingDependencies {
+    for my $name (keys %deploy) {
+        next if $deploy{$name};
+        my $path;
+        for my $dir (@searchdirs) {
+            my $fpath = "$dir/$name";
+            my $lcfpath = "$dir/" . lc($name);
+            if (-e $fpath) {
+                $path = $fpath;
+            } elsif (-e $lcfpath) {
+                $path = $lcfpath;
+            } else {
+                next;
+            }
+            addDependenciesFor($path);
+            last;
+        }
+
+        $path = "/missing/file" unless $path;
+        $deploy{$name} = $path;
+    }
+}
+
+for (@ARGV) {
+    s/^-L//;
+    next if /^-/;
+    if (-d $_) {
+        push @searchdirs, $_;
+    } elsif (-f $_) {
+        $deploy{$_} = $_;
+        addDependenciesFor($_);
+    }
+}
+
+while (1) {
+    findMissingDependencies();
+
+    my $i = 0;
+    while (my ($name, $path) = each(%deploy)) {
+        next if $path;
+        ++$i;
+        last;
+    }
+    last if $i == 0;
+}
+
+for (sort values %deploy) {
+    next if $_ eq "/missing/file";
+    print "$_\n";
+}