## Get Valhalla version
file(STRINGS "${VALHALLA_SOURCE_DIR}/valhalla/valhalla.h" version_lines REGEX "VALHALLA_VERSION_(MAJOR|MINOR|PATCH)")
foreach(line ${version_lines})
  if("${line}" MATCHES "(VALHALLA_VERSION_(MAJOR|MINOR|PATCH))[\t ]+([0-9]+)")
    set(${CMAKE_MATCH_1} ${CMAKE_MATCH_3})
    set(${CMAKE_MATCH_1} ${CMAKE_MATCH_3} PARENT_SCOPE)
  endif()
endforeach()
if(DEFINED VALHALLA_VERSION_MAJOR)
  set(VERSION "${VALHALLA_VERSION_MAJOR}")
  if(DEFINED VALHALLA_VERSION_MINOR)
    set(VERSION "${VERSION}.${VALHALLA_VERSION_MINOR}")
    if(DEFINED VALHALLA_VERSION_PATCH)
      set(VERSION "${VERSION}.${VALHALLA_VERSION_PATCH}")
    endif()
  endif()
else()
  message(FATAL_ERROR "No Valhalla major version")
endif()