/usr/bin/zia-config is in libzia-dev 4.06-2+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 | #!/bin/bash
prefix=/usr
usage="Usage: zia-config [--prefix[=DIR]] [--exec-prefix[=DIR]] [--version] [--cflags] [--libs]"
if test $# -eq 0; then
      echo "${usage}" 1>&2
      exit 1
fi
cflags=""
libs=""
if test "1" = "1"; then
    libs="$libs -lutil"
fi
if test "1" = "1"; then
    cflags="$cflags `sdl-config --cflags`"
    libs="$libs `sdl-config --libs`"
fi    
if test "1" = "1"; then
    cflags="$cflags `pkg-config --cflags 'libpng > 1.2.0'`"
    libs="$libs `pkg-config --libs 'libpng > 1.2.0'`"
fi
if test "1" = "1"; then
    cflags="$cflags `pkg-config --cflags 'glib-2.0 > 2.0.0'`"
    cflags="$cflags `pkg-config --cflags 'gthread-2.0 > 2.0.0'`"
    libs="$libs `pkg-config --libs 'glib-2.0 > 2.0.0'`"
    libs="$libs `pkg-config --libs 'gthread-2.0 > 2.0.0'`"
fi  
if test "1" = "1"; then
    cflags="$cflags `pkg-config --cflags 'gtk+-2.0 > 2.0.0'`"
    libs="$libs `pkg-config --libs 'gtk+-2.0 > 2.0.0'`"
fi  
if test "1" = "1"; then
    cflags="$cflags `pkg-config --cflags 'libftdi1 > 1.00'`"
    libs="$libs `pkg-config --libs 'libftdi1 > 1.00'`"
else    
	if test "1" = "1"; then
	    cflags="$cflags `pkg-config --cflags 'libftdi > 0.11'`"
	    libs="$libs `pkg-config --libs 'libftdi > 0.11'`"
	fi    
fi
if test "0" = "1"; then
	libs="$libs -lbfd"
fi
if test "0" = "1"; then
	libs="$libs -liberty"
fi
# prevent to use default (/usr/lib) when non-default library should be used (/usr/local/lib)
libs=`echo $libs | sed 's/-L\/usr\/lib\ //g'`
while test $# -gt 0; do
  case "$1" in
  -*=*) optarg=`echo "$1" | LC_ALL="C" sed 's/[-_a-zA-Z0-9]*=//'` ;;
  *) optarg= ;;
  esac
  case $1 in
    --prefix=*)
      prefix=$optarg
      if test $exec_prefix_set = no ; then
        exec_prefix=$optarg
      fi
      ;;
    --prefix)
      echo $prefix
      ;;
    --exec-prefix=*)
      exec_prefix=$optarg
      exec_prefix_set=yes
      ;;
    --exec-prefix)
      echo $exec_prefix
      ;;
    --version)
      echo "4.06"
      ;;
    --cflags)
      echo "$cflags -I$prefix/include/libzia"
      ;;
    --cflags2)
      echo "$cflags"
      ;;
    --libs)
      echo "$libs -L$prefix/lib -lzia-4.06 -lutil"
      ;;
    --libs2)
      echo "$libs"
      ;;
    *)
      echo "${usage}" 1>&2
      exit 1
      ;;
  esac
  shift
done
 |