Cmake File for doxygen building

git-svn-id: http://svn.eurecom.fr/openair4G/trunk@7562 818b1a75-f10b-46b9-bf7c-635c3b92a50f

cmake_targets/doxygen/CMakeLists.txt

+cmake_minimum_required(VERSION 2.8)
+include(${CMAKE_CURRENT_SOURCE_DIR}/../CMakeLists.txt)
+find_package(Doxygen)
+if(DOXYGEN_FOUND)
+configure_file(${OPENAIR_TARGETS}/DOCS/Doxyfile ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile @ONLY)
+add_custom_target(doc
+${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile
+WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
+COMMENT "Generating API documentation with Doxygen" VERBATIM
+)
+endif(DOXYGEN_FOUND)