CMake/Modules/MacroAddFileDependencies.cmake

# - MACRO_ADD_FILE_DEPENDENCIES(<_file> depend_files...)
# Using the macro MACRO_ADD_FILE_DEPENDENCIES() is discouraged. There are usually
# better ways to specify the correct dependencies.
#
# MACRO_ADD_FILE_DEPENDENCIES(<_file> depend_files...) is just a convenience 
# wrapper around the OBJECT_DEPENDS source file property. You can just
# use SET_PROPERTY(SOURCE <file> APPEND PROPERTY OBJECT_DEPENDS depend_files) instead.

#=============================================================================
# Copyright 2006-2009 Kitware, Inc.
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file Copyright.txt for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distribute this file outside of CMake, substitute the full
#  License text for the above reference.)

MACRO (MACRO_ADD_FILE_DEPENDENCIES _file)

   GET_SOURCE_FILE_PROPERTY(_deps ${_file} OBJECT_DEPENDS)
   IF (_deps)
      SET(_deps ${_deps} ${ARGN})
   ELSE (_deps)
      SET(_deps ${ARGN})
   ENDIF (_deps)

   SET_SOURCE_FILES_PROPERTIES(${_file} PROPERTIES OBJECT_DEPENDS "${_deps}")

ENDMACRO (MACRO_ADD_FILE_DEPENDENCIES)