Please set the environment variable NCARG_ROOT to the installation path of 
your NCAR distribution, and rerun perl Makefile.PL.

Loaded ExtUtils::F77 version 1.14
Found compiler g77
ExtUtils::F77: Using system=Hpux compiler=F77
Checking for gcc in disguise:
Not gcc
Runtime: -L/usr/lib -lcl -lm
ExtUtils::F77: Validating -L/usr/lib -lcl -lm   [ok]
ExtUtils::F77: Compiler: f77
ExtUtils::F77: Cflags: -O