/usr/bin/fox-config-1.6 is in libfox-1.6-dev 1.6.50-1+b1.
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 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101  | #! /bin/sh
version="1.6.50"
prefix="/usr"
exec_prefix="${prefix}"
libdir="${prefix}/lib/x86_64-linux-gnu"
includedir="${prefix}/include/fox-1.6"
LIBS="-ldl -lpthread -lrt  -ljpeg -lpng -ltiff -lz -lGLU -lGL"
X_LIBS=""
X_BASE_LIBS="-lX11 -lXext -lfreetype -lXft -lXcursor -lXrender -lXfixes -lfreetype  -lfontconfig -lfreetype "
X_EXTRA_LIBS=""
GL_LIBS="-lGL -lGLU"
FOX_LIBS="-lFOX-1.6"
usage()
{
  cat <<EOF
Usage: fox-config [OPTIONS] [LIBRARIES]
Options:
 [--prefix[=DIR]]
 [--exec-prefix[=DIR]]
 [--version]
 [--libs]
 [--cflags]
EOF
  exit $1
}
if test $# -eq 0 ; then
  usage 1 1>&2
fi
while test $# -gt 0 ; do
  case "$1" in
  -*=*) optarg=`echo "$1" | sed 's/[-_a-zA-Z0-9]*=//'` ;;
  *) optarg= ;;
  esac
  case $1 in
  --prefix=*)
    prefix=$optarg
    local_prefix=yes
    ;;
  --prefix)
    echo_prefix=yes
    ;;
  --exec-prefix=*)
    exec_prefix=$optarg
    exec_prefix_set=yes
    local_prefix=yes
    ;;
  --exec-prefix)
    echo_exec_prefix=yes
    ;;
  --version)
    echo $version
    exit 0
    ;;
  --cflags)
    echo_cflags=yes
    ;;
  --libs)
    echo_libs=yes
    ;;
  *)
    usage 1 1>&2
    ;;
  esac
  shift
done
if test "$local_prefix" = "yes" ; then
    if test "$exec_prefix_set" != "yes" ; then
      exec_prefix=$prefix
    fi
fi
if test "$echo_prefix" = "yes" ; then
 echo $prefix
fi
if test "$echo_exec_prefix" = "yes" ; then
 echo $exec_prefix
fi
if test "$echo_cflags" = "yes" ; then
 cflags="-I${includedir}"
 echo $cflags
fi
if test "$echo_libs" = "yes" ; then
 libs="${FOX_LIBS} ${X_LIBS} ${X_BASE_LIBS} ${X_EXTRA_LIBS} ${GL_LIBS} ${LIBS}"
 if test "${libdir}" != "/usr/lib" ; then
  echo -L${libdir} $libs
 else
  echo $libs
 fi
fi
# EOF
 |