Added CMake find module for udev library

cmake/Modules/FindUDev.cmake

@@ -0,0 +1,52 @@
+# Configure libudev environment
+#
+# UDEV_FOUND - system has a libudev
+# UDEV_INCLUDE_DIR - where to find header files
+# UDEV_LIBRARIES - the libraries to link against udev
+# UDEV_STABLE - it's true when is the version greater or equals to 143 - version when the libudev was stabilized in its API
+#
+# copyright (c) 2011 Petr Vanek <petr@scribus.info>
+# Redistribution and use of this file is allowed according to the terms of the BSD license.
+#
+
+FIND_PATH(
+    UDEV_INCLUDE_DIR
+    libudev.h
+    /usr/include
+    /usr/local/include
+    ${UDEV_PATH_INCLUDES}
+)
+
+FIND_LIBRARY(
+    UDEV_LIBRARIES
+    NAMES udev libudev
+    PATHS ${ADDITIONAL_LIBRARY_PATHS}
+        ${UDEV_PATH_LIB}
+)
+
+IF (UDEV_LIBRARIES AND UDEV_INCLUDE_DIR)
+    SET(UDEV_FOUND "YES")
+    execute_process(COMMAND pkg-config --atleast-version=143 libudev RESULT_VARIABLE UDEV_STABLE)
+    # retvale is 0 of the condition is "true" so we need to negate the value...
+    if (UDEV_STABLE)
+	set(UDEV_STABLE 0)
+    else (UDEV_STABLE)
+	set(UDEV_STABLE 1)
+    endif (UDEV_STABLE)
+    message(STATUS "libudev stable: ${UDEV_STABLE}")
+ENDIF (UDEV_LIBRARIES AND UDEV_INCLUDE_DIR)
+
+IF (UDEV_FOUND)
+    MESSAGE(STATUS "Found UDev: ${UDEV_LIBRARIES}")
+    MESSAGE(STATUS "   include: ${UDEV_INCLUDE_DIR}")
+ELSE (UDEV_FOUND)
+    MESSAGE(STATUS "UDev not found.")
+    MESSAGE(STATUS "UDev: You can specify includes: -DUDEV_PATH_INCLUDES=/opt/udev/include")
+    MESSAGE(STATUS "      currently found includes: ${UDEV_INCLUDE_DIR}")
+    MESSAGE(STATUS "UDev: You can specify libs: -DUDEV_PATH_LIB=/opt/udev/lib")
+    MESSAGE(STATUS "      currently found libs: ${UDEV_LIBRARIES}")
+    IF (UDev_FIND_REQUIRED)
+        MESSAGE(FATAL_ERROR "Could not find UDev library")
+    ENDIF (UDev_FIND_REQUIRED)
+ENDIF (UDEV_FOUND)
+

src/SFML/Window/CMakeLists.txt

@@ -129,6 +129,12 @@ if(SFML_OS_LINUX)
         message(FATAL_ERROR "Xrandr library not found")
     endif()
     include_directories(${X11_INCLUDE_DIR})
+
+    find_package(UDev REQUIRED)
+    if(NOT UDEV_FOUND)
+        message(FATAL_ERROR "udev library not found")
+    endif()
+    include_directories(${UDEV_INCLUDE_DIR})
 endif()
 
 # build the list of external libraries to link
@@ -136,7 +142,7 @@ set(WINDOW_EXT_LIBS ${OPENGL_gl_LIBRARY})
 if(SFML_OS_WINDOWS)
     set(WINDOW_EXT_LIBS ${WINDOW_EXT_LIBS} winmm gdi32)
 elseif(SFML_OS_LINUX OR SFML_OS_FREEBSD)
-    set(WINDOW_EXT_LIBS ${WINDOW_EXT_LIBS} ${X11_X11_LIB} ${X11_Xrandr_LIB} udev)
+    set(WINDOW_EXT_LIBS ${WINDOW_EXT_LIBS} ${X11_X11_LIB} ${X11_Xrandr_LIB} ${UDEV_LIBRARIES})
     if(SFML_OS_FREEBSD)
         set(WINDOW_EXT_LIBS ${WINDOW_EXT_LIBS} usbhid)
     endif()