[netcdf-porting] question on building on mac

Hello! I found this" Undefined symbols for architecture x86_64:" when I
built netcdf-4.1.3 ( No netcdf-4) on mac pro  ,
  I've tried to "export FCFLAGS=-m64 and export FFLAGS=$FCFLAGS" for the
env, but that just doesnot work.

Thanks for ths help!

regards

cheung