Generate documentation when compiling with CMake.

coreapi/CMakeLists.txt

@@ -145,3 +145,5 @@ install(FILES ${HEADER_FILES}
 	DESTINATION include/linphone
 	PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
 )
+
+add_subdirectory(help)

coreapi/help/CMakeLists.txt

+############################################################################
+# CMakeLists.txt
+# Copyright (C) 2014  Belledonne Communications, Grenoble France
+#
+############################################################################
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# as published by the Free Software Foundation; either version 2
+# of the License, or (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+#
+############################################################################
+
+find_package(Doxygen)
+
+if(DOXYGEN_FOUND)
+	if(DOXYGEN_DOT_FOUND)
+		set(top_srcdir ${CMAKE_SOURCE_DIR})
+		configure_file(${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile)
+		add_custom_target(doc ALL
+			${DOXYGEN_EXECUTABLE} ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile
+			DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile)
+		install(DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/doc/html" "${CMAKE_CURRENT_BINARY_DIR}/doc/xml"
+			DESTINATION "${CMAKE_INSTALL_PREFIX}/share/doc/linphone-${LINPHONE_VERSION}")
+	else()
+		message(WARNING "The dot program is needed to generate the linphone documentation. You can get it from http://www.graphviz.org/.")
+	endif()
+endif()