/usr/bin/Netxx-config is in libnetxx-dev 0.3.2-2ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 | #! /bin/sh
##
# This file was auto-generated by genconfig on Tue Aug  4 16:16:48 2015
##
usage()
{
    cat <<EOH
Usage: Netxx-config [options]
  --version   print the version number for Netxx
  --libs      print the list of libraries you must use
  --cxxflags  print the C++ compiler flags to use
EOH
    exit 1
}
if test $# -eq 0; then
    usage
fi
while test $# -gt 0; do
    case "$1" in
	--version)
	    echo "0.3.2"
	    exit 0
	    ;;
	--libs)
	    echo "-L/usr/lib/x86_64-linux-gnu -lNetxx"
	    ;;
        --cflags)
	    echo "-I/usr/include"
	    ;;
	--cxxflags)
	    echo "-I/usr/include"
	    ;;
	*)
	    usage
	    ;;
    esac
    shift
done
exit 0
 |