Fix gnu-smalltalk library for Snow Leopard.

Fixes Homebrew/homebrew#123

Formula/gnu-smalltalk.rb

@@ -1,19 +1,27 @@
 require 'formula'
 
-class GnuSmalltalk <Formula
-  @url='ftp://ftp.gnu.org/gnu/smalltalk/smalltalk-3.1.tar.gz'
-  @homepage='http://smalltalk.gnu.org/'
-  @md5='fb4630a86fc47c893cf9eb9adccd4851'
+# References:
+# * http://smalltalk.gnu.org/wiki/building-gst-guides
 
-  def patches
-    {
-      :p1 => ["http://bitbucket.org/0xffea/patches/raw/bc22b0b12337/homebrew/smalltalk-001-install.diff"]
-    }
-  end
+class GnuSmalltalk <Formula
+  url 'ftp://ftp.gnu.org/gnu/smalltalk/smalltalk-3.1.tar.gz'
+  homepage 'http://smalltalk.gnu.org/'
+  md5 'fb4630a86fc47c893cf9eb9adccd4851'
+
+  # gmp is an optional dep, but doesn't compile on 10.5
+  # depends_on 'gmp' => :optional
 
   def install
+    # Codegen problems with LLVM
+    ENV.gcc_4_2
+    # 64-bit version doesn't build, so force 32 bits.
+    ENV.m32
     ENV['FFI_CFLAGS'] = '-I/usr/include/ffi'
-    system "./configure", "--prefix=#{prefix}", "--disable-debug", "--disable-dependency-tracking", "--with-readline=/usr/lib"
+    system "./configure", "--prefix=#{prefix}", "--disable-debug", 
+                          "--disable-dependency-tracking",
+                          "--with-readline=/usr/lib"
+    system "make"
+    ENV.j1 # Parallel install doesn't work
     system "make install"
   end
 end