cmake/FindUDev.cmake

   1 # razor-de: Configure libudev environment
   2 #
   3 # UDEV_FOUND - system has a libudev
   4 # UDEV_INCLUDE_DIR - where to find header files
   5 # UDEV_LIBRARIES - the libraries to link against udev
   6 # UDEV_STABLE - it's true when is the version greater or equals to 143 - version when the libudev was stabilized in its API
   7 #
   8 # copyright (c) 2011 Petr Vanek <petr@scribus.info>
   9 # Redistribution and use is allowed according to the terms of the BSD license.
  10 #
  11
  12 FIND_PATH(
  13     UDEV_INCLUDE_DIR
  14     libudev.h
  15     /usr/include
  16     /usr/local/include
  17     ${UDEV_PATH_INCLUDES}
  18 )
  19
  20 FIND_LIBRARY(
  21     UDEV_LIBRARIES
  22     NAMES udev libudev
  23     PATHS
  24         /usr/lib${LIB_SUFFIX}
  25         /usr/local/lib${LIB_SUFFIX}
  26         ${UDEV_PATH_LIB}
  27 )
  28
  29 IF (UDEV_LIBRARIES AND UDEV_INCLUDE_DIR)
  30     SET(UDEV_FOUND "YES")
  31     execute_process(COMMAND pkg-config --atleast-version=143 libudev RESULT_VARIABLE UDEV_STABLE)
  32     # retvale is 0 of the condition is "true" so we need to negate the value...
  33     if (UDEV_STABLE)
  34 set(UDEV_STABLE 0)
  35     else (UDEV_STABLE)
  36 set(UDEV_STABLE 1)
  37     endif (UDEV_STABLE)
  38     message(STATUS "libudev stable: ${UDEV_STABLE}")
  39 ENDIF (UDEV_LIBRARIES AND UDEV_INCLUDE_DIR)
  40
  41 IF (UDEV_FOUND)
  42     MESSAGE(STATUS "Found UDev: ${UDEV_LIBRARIES}")
  43     MESSAGE(STATUS " include: ${UDEV_INCLUDE_DIR}")
  44 ELSE (UDEV_FOUND)
  45     MESSAGE(STATUS "UDev not found.")
  46     MESSAGE(STATUS "UDev: You can specify includes: -DUDEV_PATH_INCLUDES=/opt/udev/include")
  47     MESSAGE(STATUS " currently found includes: ${UDEV_INCLUDE_DIR}")
  48     MESSAGE(STATUS "UDev: You can specify libs: -DUDEV_PATH_LIB=/opt/udev/lib")
  49     MESSAGE(STATUS " currently found libs: ${UDEV_LIBRARIES}")
  50     IF (UDev_FIND_REQUIRED)
  51         MESSAGE(FATAL_ERROR "Could not find UDev library")
  52     ENDIF (UDev_FIND_REQUIRED)
  53 ENDIF (UDEV_FOUND)