pkg-config formula

Formula/pkg-config.rb

+require 'pathname'
+$root=Pathname.new(__FILE__).dirname.parent
+$:.unshift "#{$root}/Cellar/homebrew" #rubysucks
+require 'brewkit'
+
+homepage='http://pkgconfig.freedesktop.org'
+url='http://pkgconfig.freedesktop.org/releases/pkg-config-0.23.tar.gz'
+md5='d922a88782b64441d06547632fd85744'
+
+#TODO depend on our glib? --with-installed-glib
+
+Formula.new(url, md5).brew do |prefix|
+  system "./configure --with-pc-path=/usr/lib/pkgconfig:/usr/local/lib/pkgconfig:#{$root}/lib/pkgconfig --disable-debug --prefix='#{prefix}'"
+  system "make install"
+end
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