/usr/bin/pdal-config is in libpdal-dev 1.6.0-1build2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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prefix=/usr
exec_prefix=/usr/bin
libdir=/usr/lib
usage()
{
	cat <<EOF
Usage: pdal-config [OPTIONS]
Options:
	[--cflags]
	[--cxxflags]
	[--defines]
	[--includes]
	[--libs]
	[--plugin-dir]
	[--version]
	[--python-version]
EOF
	exit $1
}
if test $# -eq 0; then
	usage 1 1>&2
fi
case $1 in
  --libs)
    echo -L/usr/lib -lpdalcpp
    ;;
  --plugin-dir)
    echo /usr/lib
    ;;
  --prefix)
    echo ${prefix}
     ;;
  --ldflags)
    echo -L${libdir}
    ;;
  --defines)
    echo 
    ;;
  --includes)
    echo -I/usr/include -I/usr/include/gdal -I/usr/include/libxml2 -I/usr/include
    ;;
  --cflags)
    echo -g -O2 -fdebug-prefix-map=/build/pdal-_8IhSI/pdal-1.6.0=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2
    ;;
  --cxxflags)
    echo -g -O2 -fdebug-prefix-map=/build/pdal-_8IhSI/pdal-1.6.0=. -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -Wdate-time -D_FORTIFY_SOURCE=2 -std=c++11
    ;;
  --version)
    echo 1.6.0
    ;;
  --python-version)
    echo 2.7.14
    ;;
  *)
    usage 1 1>&2
    ;;
esac
 |