/usr/bin/get-wutil-flags is in libwings-dev 0.95.7-8.
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 | #!/bin/sh
# [Christophe CURIS, 2015/01/31]
# This script is now reporting itself as deprecated (this should have been done
# a long time ago), so it should be kept for at least 2 years from now in order
# to allow users to update their scripts, and then removed.
if test $# -eq 0; then
      echo "Error: $0 is deprecated, please use 'pkg-config WUtil ...'" >&2
      exit 1
fi
while test $# -gt 0; do
  case $1 in
    --cflags)
        echo "Warning: $0 is deprecated, please use 'pkg-config WUtil --cflags'" >&2
	pkg-config WUtil --cflags
        ;;
    --ldflags|--lflags)
	echo "Warning: $0 is deprecated, please use 'pkg-config WUtil --libs'" >&2
        pkg-config WUtil --libs-only-L
        ;;
    --libs)
	echo "Warning: $0 is deprecated, please use 'pkg-config WUtil --libs'" >&2
        pkg-config WUtil --libs
        ;;
    *)
	echo "Error: $0 is deprecated, please use 'pkg-config WUtil ...'" >&2
	exit 1
	;;
  esac
  shift
done
 |