diff --git a/INSTALL b/INSTALL
index e26a35b5..f567f50c 100644
--- a/INSTALL
+++ b/INSTALL
@@ -7,9 +7,9 @@ You need the following installed:
   Perl
 
 Debian/Ubuntu users need:
-  libssl-dev libcrypt-openssl-rsa-perl libao2 libao-dev libio-socket-inet6-perl
+  libssl-dev libcrypt-openssl-rsa-perl libao2 libao-dev libio-socket-inet6-perl libwww-perl avahi-utils
 
-Perl modules (e.g. `perl -MCPAN -e 'install X'`):
+Perl modules (install from CPAN if needed e.g. `perl -MCPAN -e 'install X'`):
   HTTP::Message
   Crypt::OpenSSL::RSA
   IO::Socket::INET6
diff --git a/Makefile b/Makefile
index 030111be..27e5be0f 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,5 @@
 PKGFLAGS:=$(shell pkg-config --cflags --libs openssl ao)
-CFLAGS:=-D__i386 -O2
+CFLAGS:=-O2
 LDFLAGS:=-lm -lpthread
 PAUFLAGS:=-lportaudio
 
diff --git a/README.md b/README.md
index 246ff986..75255de8 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-Shairport v0.03
+Shairport v0.04
 ==============
 James Laird <jhl@mafipulation.org>
 April 11, 2011
@@ -38,8 +38,9 @@ Changelog
 * 0.02  April 11, 2011
     * bugfix: libao compatibility
 * 0.03  April 11, 2011
-    * bugfix: ipv6 didn't work -
-	* IO::Socket::INET6 is required too
+    * bugfix: ipv6 didn't work - IO::Socket::INET6 is required too
+* 0.04  April 12, 2011
+    * cross-platform count_leading_zeros under GCC - will now compile cleanly on ARM and other platforms
 
 
 How to compile and install on Mac OSX 10.6
@@ -55,10 +56,10 @@ prerequisite: install XCode, install homebrew (https://github.com/mxcl/homebrew)
 OSX 10.5 only bundles perl 5.8, which won't work with shairport. After getting a update
 here (http://www.perl.org/get.html), it worked.
 
-Available launch options for 
+Available launch options for
 ------
     $ shairport.pl --apname=My Name --password=secret
-    
+
 
 How to run as a daemon on Mac OSX 10.6
 ------
diff --git a/alac.c b/alac.c
index cd0860a2..19156f75 100644
--- a/alac.c
+++ b/alac.c
@@ -218,18 +218,13 @@ static int count_leading_zeros(int32_t input)
     }
     return i;
 }
-#elif defined(__GNUC__) && (defined(_X86) || defined(__i386) || defined(i386))
+#elif defined(__GNUC__)
 /* for some reason the unrolled version (below) is
  * actually faster than this. yay intel!
  */
 static int count_leading_zeros(int input)
 {
-    int output = 0;
-    if (!input) return 32;
-    __asm("bsr %1, %0\n"
-        : "=r" (output)
-        : "r" (input));
-    return (0x1f - output);
+    return __builtin_clz(input);
 }
 #elif defined(_MSC_VER) && defined(_M_IX86)
 static int count_leading_zeros(int input)
diff --git a/shairport.pl b/shairport.pl
index 1422abf4..4a523960 100755
--- a/shairport.pl
+++ b/shairport.pl
@@ -114,10 +114,10 @@ my $listen;
                             Proto => 'tcp');
     };
     if ($@) {
-            print "**************************************\n\n",
-                  "* IO::Socket::INET6 not present!     *\n",
-                  "* Install this if iTunes won't play. *\n",
-                  "**************************************\n\n";
+        print "**************************************\n",
+              "* IO::Socket::INET6 not present!     *\n",
+              "* Install this if iTunes won't play. *\n",
+              "**************************************\n\n";
 
             $listen = new IO::Socket::INET(Listen => 1,
                             LocalPort => 5000,