netcdf: Update to 4.2.1.1

Also, use the new options DSL.

Library/Formula/netcdf.rb

@@ -1,13 +1,5 @@
 require 'formula'
 
-def fortran?
-  ARGV.include? '--enable-fortran'
-end
-
-def no_cxx?
-  ARGV.include? '--disable-cxx'
-end
-
 class NetcdfCXX < Formula
   homepage 'http://www.unidata.ucar.edu/software/netcdf'
   url 'http://www.unidata.ucar.edu/downloads/netcdf/ftp/netcdf-cxx4-4.2.tar.gz'
@@ -22,20 +14,16 @@ class NetcdfFortran < Formula
 
 class Netcdf < Formula
   homepage 'http://www.unidata.ucar.edu/software/netcdf'
-  url 'http://www.unidata.ucar.edu/downloads/netcdf/ftp/netcdf-4.2.1.tar.gz'
-  sha1 'dfb6b10ef8dd20e785efa5e29b448383090f144d'
+  url 'http://www.unidata.ucar.edu/downloads/netcdf/ftp/netcdf-4.2.1.1.tar.gz'
+  sha1 '76631cb4e6b767c224338415cf6e5f5ff9bd1238'
 
   depends_on 'hdf5'
 
-  def options
-    [
-      ['--enable-fortran', 'Compile Fortran bindings'],
-      ['--disable-cxx', "Don't compile C++ bindings"]
-    ]
-  end
+  option 'enable-fortran', 'Compile Fortran Bindings'
+  option 'disable-cxx', "Don't compile C++ bindings"
 
   def install
-    if fortran?
+    if build.include? 'enable-fortran'
       ENV.fortran
       # fix for ifort not accepting the --force-load argument, causing
       # the library libnetcdff.dylib to be missing all the f90 symbols.
@@ -66,11 +54,11 @@ def install
     NetcdfCXX.new.brew do
       system './configure', *common_args
       system 'make install'
-    end unless no_cxx?
+    end unless build.include? 'disable-cxx'
 
     NetcdfFortran.new.brew do
       system './configure', *common_args
       system 'make install'
-    end if fortran?
+    end if build.include? 'enable-fortran'
   end
 end