Fix version check when trying to find freenect2 with find_package

Author: Patrick Stotko

CMakeLists.txt

@@ -435,12 +435,14 @@ MESSAGE(STATUS "Linking with these libraries: \n ${LIBRARIES_STRING}")
 TARGET_LINK_LIBRARIES(freenect2 ${LIBRARIES})
 
 CONFIGURE_FILE(freenect2.cmake.in "${PROJECT_BINARY_DIR}/freenect2Config.cmake" @ONLY)
+CONFIGURE_FILE(freenect2Version.cmake.in "${PROJECT_BINARY_DIR}/freenect2ConfigVersion.cmake" @ONLY)
 CONFIGURE_FILE(freenect2.pc.in "${PROJECT_BINARY_DIR}/freenect2.pc" @ONLY)
 
 INSTALL(TARGETS freenect2 DESTINATION lib RUNTIME DESTINATION bin)
 INSTALL(DIRECTORY "${MY_DIR}/include/${PROJECT_NAME}" DESTINATION include PATTERN "*.in" EXCLUDE)
 INSTALL(DIRECTORY "${PROJECT_BINARY_DIR}/${PROJECT_NAME}" DESTINATION include)
 INSTALL(FILES "${PROJECT_BINARY_DIR}/freenect2Config.cmake" DESTINATION lib/cmake/freenect2/)
+INSTALL(FILES "${PROJECT_BINARY_DIR}/freenect2ConfigVersion.cmake" DESTINATION lib/cmake/freenect2/)
 INSTALL(FILES "${PROJECT_BINARY_DIR}/freenect2.pc" DESTINATION lib/pkgconfig/)
 
 ADD_SUBDIRECTORY(${MY_DIR}/doc)

freenect2.cmake.in

@@ -8,4 +8,3 @@ FIND_PATH(freenect2_INCLUDE_DIR @PROJECT_NAME@/libfreenect2.hpp
     NO_DEFAULT_PATH
 )
 SET(freenect2_INCLUDE_DIRS ${freenect2_INCLUDE_DIR})
-SET(freenect2_VERSION @PROJECT_VER@)

freenect2Version.cmake.in

@@ -0,0 +1,11 @@
+set(PACKAGE_VERSION "@PROJECT_VER@")
+
+# Check whether the requested PACKAGE_FIND_VERSION is compatible
+if("${PACKAGE_VERSION}" VERSION_LESS "${PACKAGE_FIND_VERSION}")
+  set(PACKAGE_VERSION_COMPATIBLE FALSE)
+else()
+  set(PACKAGE_VERSION_COMPATIBLE TRUE)
+  if ("${PACKAGE_VERSION}" VERSION_EQUAL "${PACKAGE_FIND_VERSION}")
+    set(PACKAGE_VERSION_EXACT TRUE)
+  endif()
+endif()