SET(PUGIXML_PKG_DIR "" CACHE PATH "Path to pugixml package")
SET(PUGIXML_SRC_DIR "" CACHE PATH "Path to pugixml source directory")
SET(PUGIXML_INC_DIR "" CACHE PATH "Path to pugixml include directory")
SET(PUGIXML_LIB_DIR "" CACHE PATH "Path to pugixml library directory")

IF (NOT PUGIXML_SRC_DIR STREQUAL "")
  add_subdirectory(${PUGIXML_SRC_DIR} ${CMAKE_CURRENT_BINARY_DIR}/pugixml)
  message(STATUS "Using pugixml source from ${PUGIXML_SRC_DIR}")
ELSE()
  IF (NOT PUGIXML_PKG_DIR STREQUAL "")
    find_package(pugixml CONFIG PATHS ${PUGIXML_PKG_DIR})
  ELSE()
    find_package(pugixml CONFIG)
  ENDIF()
  
  IF (pugixml_FOUND)
    IF (PUGIXML_INC_DIR STREQUAL "")
      include_directories(${pugixml_DIR}/../../../include)
    ELSE()
	  include_directories(${PUGIXML_INC_DIR})
    ENDIF()
    message(STATUS "Using pugixml package from ${pugixml_DIR}")
    message(STATUS "pugixml include dir: ${pugixml_DIR}/../../../include")
  ELSEIF (NOT PUGIXML_INC_DIR STREQUAL "" AND NOT PUGIXML_LIB_DIR STREQUAL "")
    set(pugixml_FOUND TRUE)
    include_directories(${PUGIXML_INC_DIR})
    link_directories(${PUGIXML_LIB_DIR})
    add_library(pugixml STATIC IMPORTED)
    message(STATUS "Using pugixml include directory and library directory from ${PUGIXML_INC_DIR} and ${PUGIXML_LIB_DIR}")
  ENDIF()
ENDIF()

IF (NOT pugixml_FOUND)
  message(FATAL_ERROR "pugixml not found")
ENDIF()