address@hidden ~/software/netcdf-3.6.2
$ CC=gcc FC=gfortran-4 F77=gfortran-4 CPPFLAGS=-DpgiFortran ./configure
configure: netCDF 3.6.2
checking build system type... ./config.guess: unable to guess system type

This script, last modified 2005-07-08, has failed to recognize
the operating system you are using. It is advised that you
download the most up to date version of the config scripts from

  http://savannah.gnu.org/cgi-bin/viewcvs/*checkout*/config/config/config.guess
and
  http://savannah.gnu.org/cgi-bin/viewcvs/*checkout*/config/config/config.sub

If the version you run (./config.guess) is already up to date, please
send the following data and any information you think might be
pertinent to <address@hidden> in order to provide the needed
information to handle your system.

config.guess timestamp = 2005-07-08

uname -m = x86_64
uname -r = 1.7.27(0.271/5/3)
uname -s = CYGWIN_NT-6.1
uname -v = 2013-12-09 11:54

/usr/bin/uname -p = unknown
/bin/uname -X     =

hostinfo               =
/bin/universe          =
/usr/bin/arch -k       =
/bin/arch              = x86_64
/usr/bin/oslevel       =
/usr/convex/getsysinfo =

UNAME_MACHINE = x86_64
UNAME_RELEASE = 1.7.27(0.271/5/3)
UNAME_SYSTEM  = CYGWIN_NT-6.1
UNAME_VERSION = 2013-12-09 11:54
configure: error: cannot guess build type; you must specify one