/usr/bin/libetpan-config is in libetpan-dev 1.6-1build1.
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 | #!/bin/sh
prefix=/usr
exec_prefix=${prefix}
exec_prefix_set=no
usage="\
Usage: libetpan-config [--prefix[=DIR]] [--exec-prefix[=DIR]] [--version] [--libs] [--cflags]"
if test $# -eq 0; then
      echo "${usage}" 1>&2
      exit 1
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
      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 $exec_prefix
      ;;
    --version)
      echo 1.6
      ;;
    --cflags)
      if test "${prefix}/include" = "/usr/include" ; then
          includedir=""
      else
	  includedir=-I${prefix}/include
      fi
      echo $includedir
      ;;
    --libs)
      libdir=-L${prefix}/lib/x86_64-linux-gnu
      echo $libdir -letpan -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -lz  -lgnutls  -ldb-5.3 -lz -llockfile  -pthread -lsasl2 
      ;;
    *)
      echo "${usage}" 1>&2
      exit 1
      ;;
  esac
  shift
done
 |