Mine

#! c:\PXPerl\bin\perl.exe -w

use strict;
use File::Find ();
use vars qw/*name *dir *prune/;
*name   = *File::Find::name;
*dir    = *File::Find::dir;
*prune  = *File::Find::prune;

sub wanted;
my $dir = shift; warn "Directory: $dir"; File::Find::find({wanted => \&wanted}, $dir);
exit;

sub wanted {
    my ($dev,$ino,$mode,$nlink,$uid,$gid);

    /^.*\.rel\z/s &&
    (($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_)) &&
    -f _
    && eval { 
    	$name =~ s/^\.\///;
    	$name =~ s/\..*$//;
    	system("c:/sdcc/bin/sdcc.exe --model-small --code-loc 0x4000 --xram-loc 0x0000 $name.rel");
    	system("c:/sdcc/bin/packihx.exe $name.ihx > $name.hex");
    	system("c:/sdcc/bin/copyclip.exe $name.hex");
	}
}