GNU Guile formula

Guile is a library designed to help programmers create flexible applications. Using Guile
in an application allows programmers to write plug-ins, or modules (there are many names,
but the concept is essentially the same) and users to use them to have an application fit
their needs.

Formula/guile.rb

@@ -0,0 +1,31 @@
+require 'brewkit'
+
+class Guile <Formula
+  @url='ftp://alpha.gnu.org/gnu/guile/guile-1.9.3.tar.gz'
+  @homepage='http://www.gnu.org/software/guile/'
+  @sha1='c8d1d25ed413b48493ec5b0cbf4de8593cab4a21'
+
+  depends_on 'libunistring'
+  depends_on 'bdw-gc'
+  depends_on 'gmp'
+  
+  # GNU Readline is required
+  # libedit won't work.
+  depends_on 'readline'
+
+  def install
+    ENV['PKG_CONFIG_PATH'] = "#{HOMEBREW_PREFIX}/lib/pkgconfig"
+
+    system "./configure",
+        "--prefix=#{prefix}", 
+        "--disable-debug", 
+        "--disable-dependency-tracking",
+        # Specifically look for readline here
+        # At least, we don't want the fake readline in
+        # /usr/lib to trump us, since it doesn't export
+        # all the same symbols
+        # --adamv
+        "--with-libreadline-prefix=#{HOMEBREW_PREFIX}"
+    system "make install"
+  end
+end