/usr/bin/libecasoundc-config is in libecasoundc-dev 2.9.1-7build1.
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  | #!/bin/sh
usage()
{
	echo "usage: $0 [OPTIONS]"
cat << EOH
options:
	[--libs]
	[--libs_debug]
	[--cflags]
	[--version]
EOH
	exit 1;
}
prefix=/usr
exec_prefix=${prefix}
libdir=${prefix}/lib/x86_64-linux-gnu
includedir=${prefix}/include
flags=""
while test $# -gt 0
do
  case $1 in
    --libs)
	  flags="$flags -L$libdir -lecasoundc"
	  ;;
    --libs_debug)
	  flags="$flags -L$libdir -lecasoundc_debug"
	  ;;
    --ldflags)
	  case "$libdir" in
	      /usr/lib);;
	      *)
		  flags="$flags -Wl,--rpath -Wl,$libdir" ;;
	  esac
	  ;;
    --cflags)
	  flags="$flags -I$includedir/libecasoundc"
	  ;;
    --version)
	  echo 2.9.1
	  ;;
	*)
	  echo "$0: unknown option $1"
	  echo 
	  usage
	  ;;
  esac
  shift
done
if test -n "$flags"
then
  echo $flags
fi
 |