ENH: new module to find the FindKDE4Internal.cmake installed by kdelibs4

Alex

Modules/FindKDE4.cmake

@@ -0,0 +1,60 @@
+# Find KDE4 and provide all necessary variables and macros to compile software for it.
+# It looks for KDE 4 in the following directories in the given order:
+# - CMAKE_INSTALL_PREFIX
+# - KDEDIR
+# - /opt/kde4
+# - /opt/kde
+#
+# Please look in FindKDE4Internal.cmake and KDE4Macros.cmake for more information.
+# They are installed with the KDE 4 libraries in $KDEDIR/share/apps/cmake/modules/.
+#
+# Author: Alexander Neundorf <neundorf@kde.org>
+
+# First try to find kde-config
+FIND_PROGRAM(KDE4_KDECONFIG_EXECUTABLE NAMES kde-config
+   PATHS
+   ${CMAKE_INSTALL_PREFIX}/bin
+   $ENV{KDEDIR}/bin
+   /opt/kde4/bin
+   /opt/kde
+   /bin
+   /usr/bin
+   /usr/local/bin
+   NO_SYSTEM_PATH
+   )
+
+IF (KDE4_KDECONFIG_EXECUTABLE)
+   # then ask kde-config for the kde data dirs
+   EXEC_PROGRAM(${KDE4_KDECONFIG_EXECUTABLE} ARGS --path data OUTPUT_VARIABLE _data_DIR )
+
+   # replace the ":" with ";" so that it becomes a valid cmake list
+   STRING(REGEX REPLACE ":" ";" _data_DIR "${_data_DIR}")
+
+   # then check the data dirs for FindKDE4Internal.cmake
+   FIND_PATH(KDE4_DATA_DIR cmake/modules/FindKDE4Internal.cmake ${_data_DIR})
+
+   # if it has been found...
+   IF (KDE4_DATA_DIR)
+
+      SET(CMAKE_MODULE_PATH  ${KDE4_DATA_DIR}/cmake/modules ${CMAKE_MODULE_PATH})
+
+      IF (KDE4_FIND_QUIETLY)
+         SET(_quiet QUIET)
+      ENDIF (KDE4_FIND_QUIETLY)
+
+      IF (KDE4_FIND_REQUIRED)
+         SET(_req REQUIRED)
+      ENDIF (KDE4_FIND_REQUIRED)
+
+      # use FindKDE4Internal.cmake to do the rest
+      FIND_PACKAGE(KDE4Internal ${_req} ${_quiet})
+
+   ENDIF (KDE4_DATA_DIR)
+
+ENDIF (KDE4_KDECONFIG_EXECUTABLE)
+
+
+IF (KDE4_FIND_REQUIRED AND NOT KDE4_FOUND)
+   MESSAGE(FATAL_ERROR "Could not find KDE4")
+ENDIF (KDE4_FIND_REQUIRED AND NOT KDE4_FOUND)
+