function(makePlan abi outputLocation)
    if(NOT abi)
        file(GLOB abidir build/*/include/*)
        foreach(dir ${abidir})
            if(IS_DIRECTORY "${dir}")
                string(REGEX REPLACE "^.*/([^/]*)$" "\\1" abi "${dir}")
            endif()
        endforeach()
    endif()

    set(impls)
    set(types)

    file(GLOB files build/*/include/*/*.h)
    foreach(header ${files})
        file(STRINGS ${header} content)
        foreach(line ${content})
            if ("${line}" MATCHES "#define .*_IMPLEMENTATION \"")
                string(REGEX REPLACE "#define .*_IMPLEMENTATION (\".*\")" "\\1" impl "${line}")
                list(APPEND impls "${impl}\n")
            endif()
            if ("${line}" MATCHES "^typedef ")
                list(APPEND types "\"${line}\"\n")
            endif()
        endforeach()
    endforeach()

    set(tmp)
    list(APPEND tmp "set(PLAN_IMPLEMENTATIONS\n")
    list(APPEND tmp "${impls}")
    list(APPEND tmp ")\n")
    list(APPEND tmp "set(PLAN_TYPES\n")
    list(APPEND tmp "${types}")
    list(APPEND tmp ")\n")
    string(REPLACE "\n;" "\n" tmpoutStr "${tmp}")

    if("${outputLocation}" STREQUAL "")
        set(outputLocation "cmake/plans/${abi}_plan.cmake")
    endif()

    message("Created new build plan for [${abi}]")
    message("${tempOutStr}")
    message("Writing plan to [${outputLocation}]")

    file(WRITE "${outputLocation}" "${tmpoutStr}")

endfunction()