gdal: use numpy resource.

Formula/gdal.rb

@@ -18,6 +18,10 @@ class Gdal < Formula
   option 'enable-mdb', 'Build with Access MDB driver (requires Java 1.6+ JDK/JRE, from Apple or Oracle).'
 
   depends_on :python => :recommended
+  if build.with? "python"
+    depends_on :fortran => :build
+  end
+
   depends_on 'libpng'
   depends_on 'jpeg'
   depends_on 'giflib'
@@ -33,9 +37,6 @@ class Gdal < Formula
   depends_on "postgresql" => :optional
   depends_on "mysql" => :optional
 
-  # Without Numpy, the Python bindings can't deal with raster data.
-  depends_on 'numpy' => :python if build.with? 'python'
-
   depends_on 'homebrew/science/armadillo' if build.include? 'enable-armadillo'
 
   if build.include? 'complete'
@@ -71,6 +72,11 @@ class Gdal < Formula
     end if build.include? "enable-mdb"
   end
 
+  resource 'numpy' do
+    url 'http://downloads.sourceforge.net/project/numpy/NumPy/1.8.1/numpy-1.8.1.tar.gz'
+    sha1 '8fe1d5f36bab3f1669520b4c7d8ab59a21a984da'
+  end
+
   def get_configure_args
     args = [
       # Base configuration.
@@ -200,6 +206,13 @@ class Gdal < Formula
   end
 
   def install
+    if build.with? 'python'
+      ENV.prepend_create_path 'PYTHONPATH', libexec+'lib/python2.7/site-packages'
+      numpy_args = [ "build", "--fcompiler=gnu95",
+                     "install", "--prefix=#{libexec}" ]
+      resource('numpy').stage { system "python", "setup.py", *numpy_args }
+    end
+
     # Linking flags for SQLite are not added at a critical moment when the GDAL
     # library is being assembled. This causes the build to fail due to missing
     # symbols. Also, ensure Homebrew SQLite is used so that Spatialite is