avoid distracting error output

netcdf_SYSLIB =

netcdf_SYSPATH =

ifneq ($(shell which nc-config),)

ifneq ($(shell which nc-config 2>> /dev/null),)

netcdf_SYSINC += -DLMP_HAS_NETCDF $(shell nc-config --cflags)

netcdf_SYSLIB += $(shell nc-config --libs)

endif

ifneq ($(shell which ncmpidump),)

ifneq ($(shell which ncmpidump 2>> /dev/null),)

PNETCDF_PATH = ($shell which ncmpidump | sed -e 's,bin/ncmpidump,,')

netcdf_SYSINC = -DLMP_HAS_PNETCDF -I$(PNETCDF_PATH)/include

netcdf_SYSLIB = -lpnetcdf