Updated NetCDF to build shared libs

By default, NetCDF only builds static libs.  This leads to some
complicated dependencies that must be satisfied by other programs that
link against libnetcdf.a:

    nc-config --libs
    -L/<brew root>/Cellar/netcdf/4.1.1/lib -lnetcdf
    -L/<brew root>/Cellar/hdf5/1/lib -lhdf5_hl -lhdf5 -lz -lm -lcurl

HDF5 is required to access version 4 of the NetCDF file format.

When shared libraries are provided, the linking requirements are
greatly simplified:

    nc-config --libs
    -L/<brew root>/Cellar/netcdf/4.1.1/lib -lnetcdf

This eases the build process for other formulas that depend on NetCDF
libraries.

The static libraries are still compiled and available for use.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/Library/Formula/netcdf.rb b/Library/Formula/netcdf.rb
index fb00df046..dcdbba227 100644
--- a/Library/Formula/netcdf.rb
+++ b/Library/Formula/netcdf.rb
@@ -6,16 +6,19 @@ class Netcdf <Formula
   md5 '79c5ff14c80d5e18dd8f1fceeae1c8e1'
 
   depends_on 'hdf5'
-  depends_on 'szip'
 
   def install
+    # HDF5 is required to create and access files
+    # in the NetCDF version 4 format.
     hdf5 = Formula.factory('hdf5')
     szip = Formula.factory('szip')
 
     system "./configure", "--prefix=#{prefix}",
                           "--disable-dependency-tracking",
                           "--with-szip=#{szip.prefix}",
-                          "--with-hdf5=#{hdf5.prefix}"
+                          "--with-hdf5=#{hdf5.prefix}",
+                          "--enable-netcdf4",
+                          "--enable-shared"
     system "make install"
   end
 end