Impossible to build ROPP on (unsupported platform) Cygwin

[Ian Culverwell]

ROPP8.0 beta reviewer Dave Offiler (UKMO) found:

	    Beta-test Report on ROPP-8 (Cygwin) - Dave Offiler
	   ===================================================

System OS: Windows 7 Pro / Cygwin 1.7.33 64-bit

Compilers: gcc/gfortran v4.8.3 (distro version)

ROPP tarball ropp-8.0.tar.gz downloaded from ROM SAF ROPP-beta website

-----------------------------------------------------------------------------

1) Basic build

All dependency packages & ROPP modules build using the 'build*_ropp' wrapper 
scripts to the main 'buildpack' script and using the provided configure
mini-scripts.

a) Dependencies

Release versions as recommended for use with ROPP, and provided on the 
ROPP-beta website:

netCDF v4.1.3 in classic (non-HDF5) mode 

GRIB-API v1.9.9

ECMWF BUFR v387

b) Issues

netCDF (classic and -4): Cannot be built due to: "C++ pre-processor /lib/cpp
  fails sanity check" in ./configure. Inspection of the config.log suggests a
  syntax error in the dummy test program, but this stuff is black magic to me,
  and there is no  obvious solution.

GRIB-API: Fails on a test: TEST: ./ieee.sh ./ieee.sh: line 42:  5056
Segmentation fault      (core dumped)  ${tools_dir}grib_filter -o $out32
w.filter $infile FAIL: ieee.sh Manual 'make install'...

ECBUFR: OK

ROPP_UTILS: ./configure fails: "configure: error: cannot guess build type; you
  must specify one"

ROPP_IO: ./configure fails: "Module NETCDF not found"

ROPP_PP, ROPP_FM, ROPP_1DVAR: same as ROPP_UTILS. Additional text:

"checking build system type... ./config.guess: unable to guess system type

This script, last modified 2005-02-10, 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

    ftp://ftp.gnu.org/pub/gnu/config/

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
<config-patches@gnu.org> in order to provide the needed information to handle
your system.

config.guess timestamp = 2005-02-10

uname -m = x86_64 uname -r = 1.7.33-2(0.280/5/3) uname -s = CYGWIN_NT-6.1 uname
-v = 2014-11-13 15:47

/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 = 1.7.33-2(0.280/5/3) UNAME_SYSTEM  =
CYGWIN_NT-6.1 UNAME_VERSION = 2014-11-13 15:47 configure: error: cannot guess
build type; you must specify one"

Give up on Cygwin!!!

Looks pretty hopeless ... consider dropping Cygwin support entirely?

[Ian Culverwell]

This turns out not be the case. The latest installation of Cygwin does not automatically include the gcc compiler, which was the root of the problem. Installing gcc manually solves these problems.