Homebrew Recipe to install Proj version 4.7.0 (which is required for the Proj4rb gem on OSX)

proj.rb

require 'formula'

class ProjDatumgrid < Formula
  url 'http://download.osgeo.org/proj/proj-datumgrid-1.5.zip'
  sha1 '4429ba1a8c764d5c0e6724d868f6874f452f7440'
end

class Proj < Formula
  url 'http://download.osgeo.org/proj/proj-4.7.0.tar.gz'
  homepage 'http://trac.osgeo.org/proj/'
  sha1 'bfe59b8dc1ea0c57e1426c37ff2b238fea66acd7'

  fails_with_llvm :build => 2334

  def skip_clean? path
    path.extname == '.la'
  end

  def install
    # The datum grid files are required to support datum shifting
    d = Dir.getwd
    ProjDatumgrid.new.brew { cp Dir["*"], "#{d}/nad/" }

    system "./configure", "--prefix=#{prefix}", "--disable-debug", "--disable-dependency-tracking"
    system "make install"
  end
end