/usr/bin/gtkada-config is in libgtkada-bin 2.24.1-2.
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  | #!/bin/sh
prefix=/usr
libdir=${prefix}/lib/x86_64-linux-gnu
alidir=${prefix}/lib/x86_64-linux-gnu/ada/adalib/gtkada
includedir=${prefix}/share/ada/adainclude/gtkada
gtk_libs="-L${libdir} -lgtk-x11-2.0 -lgdk-x11-2.0 -lgio-2.0 -lpangocairo-1.0 -lgdk_pixbuf-2.0 -lcairo -lpango-1.0 -lgmodule-2.0 -lgobject-2.0 -lglib-2.0 -lX11"
cflags_static="-aI${includedir} -aO${alidir}"
cflags_relocatable="-aI${includedir} -aO${alidir}"
libs_relocatable="-L${libdir} -lgtkada ${gtk_libs}"
libs_static="${libdir}/libgtkada.a ${gtk_libs}"
usage()
{
        cat <<EOF
Usage: gtkada-config [OPTIONS]
Options:
        [--prefix]
        [--version|-v]
        [--libs]
        [--cflags]
        [--static]
        [--help|-h]
EOF
        exit $1
}
show_cflags=1
show_libs=1
libtype=relocatable
while test $# -gt 0; do
  case "$1" in
  -*=*) optarg=`echo "$1" | sed 's/[-_a-zA-Z0-9]*=//'` ;;
  *) optarg= ;;
  esac
  case $1 in
    --help|-h)
      usage 1>&2
      exit 1
      ;;
    --static)
      libtype=static
      ;;
    --prefix)
      echo $prefix
      exit 0
      ;;
    --version|-v)
      echo 2.24.1
      exit 0
      ;;
    --libs)
      show_libs=1
      show_cflags=0
      ;;
    --cflags)
      show_libs=0
      show_cflags=1
      ;;
    *)
      usage 1>&2
      exit 1
      ;;
  esac
  shift
done
result=""
if [ $show_cflags = 1 ]; then
   if [ $libtype = static ]; then
      result="$cflags_static"
   else
      result="$cflags_relocatable"
   fi
   if [ $show_libs = 1 ]; then
     result="$result -largs "
   fi
fi
if [ $show_libs = 1 ]; then
   if [ $libtype = static ]; then
     result="${result}${libs_static}"
   else
     result="${result}${libs_relocatable}"
   fi
fi
echo $result
 |