Fail to build C++ interface libraries with NCO-5.0.1

[maxim-masterov]

The --enable-nco_cplusplus option does not affect the configure script. The problem is in the if-statement that determines if the NCO_CXX variable should be set:

nco/configure

Lines 21534 to 21540 in 7d9a7d8

	if test "${ac_cv_cxx_have_valarray}" = 'yes' && test "${enable_nco_cxx}" = 'yes' ; then
	ac_config_files="$ac_config_files src/nco_c++/Makefile"
	NCO_CXX="nco_c++"
	else
	NCO_CXX=
	fi

The ac_cv_cxx_have_valarray variable is not defined in the configure script since v4.9.9. Shouldn't it be removed completely?

[czender]

Thank you for pointing this out. I'd rather repair the option to build libnco_c++, though default that to turn-off, and remove the check on the undefined variable you point out. Testing now...