ParallelIO

    # Parse the input arguments

    set (oneValueArgs NAME MACRO_REGEX)

    set (multiValueArgs HINTS)

    cmake_parse_arguments (${PKG} "" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})    

​

    # If the return variable is defined, already, don't continue

    if (NOT DEFINED ${PKG}_VERSION)

        message (STATUS "Checking ${PKG} version")

        find_file (${PKG}_VERSION_HEADER

                   NAMES ${${PKG}_NAME}

                   HINTS ${${PKG}_HINTS})

        if (${PKG}_VERSION_HEADER)

            set (def)

            file (STRINGS ${${PKG}_VERSION_HEADER} deflines

                  REGEX "^#define[ \\t]+${${PKG}_MACRO_REGEX}")

            foreach (defline IN LISTS deflines)

                string (REPLACE "\"" "" defline "${defline}")

                string (REPLACE "." "" defline "${defline}")