/usr/bin/rep-config is in librep-dev 0.90.2-1.4ubuntu3.
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
usage="usage: rep-config [--version] [--libs] [--cflags] [--execdir] [--lispdir]"
if test $# -eq 0; then
      echo "${usage}" 1>&2
      exit 1
fi
while test $# -gt 0; do
  case $1 in
    --version)
      echo "0.90.2"
      ;;
    --cflags)
      echo "-I/usr/include -I/usr/lib/rep/x86_64-pc-linux-gnu"
      ;;
    --libs)
      echo "-L/usr/lib -lrep  -ldl  -lcrypt -lgmp -lm"
      ;;
    --execdir)
      echo "/usr/lib/rep/x86_64-pc-linux-gnu"
      ;;
    --lispdir)
      echo "/usr/share/rep/site-lisp"
      ;;
    *)
      echo "${usage}" 1>&2
      exit 1
      ;;
  esac
  shift
done
 |