function(sm_append_simple_target_property target property str)
  get_target_property(current_property ${target} ${property})
  if (current_property)
    list(APPEND current_property ${str})
    set_target_properties(${target} PROPERTIES ${property} "${current_property}")
  else()
    set_target_properties(${target} PROPERTIES ${property} ${str})
  endif()
endfunction()

function(sm_add_compile_definition target def)
  sm_append_simple_target_property(${target} COMPILE_DEFINITIONS ${def})
endfunction()

function(sm_add_compile_flag target flag)
  sm_append_simple_target_property(${target} COMPILE_FLAGS ${flag})
endfunction()

function(sm_add_link_flag target flag)
  if (MSVC)
    # Use a modified form of sm_append_simple_target_property.
	get_target_property(current_property ${target} LINK_FLAGS)
	if (current_property)
	  set_target_properties(${target} PROPERTIES LINK_FLAGS "${current_property} ${flag}")
	else()
	  set_target_properties(${target} PROPERTIES LINK_FLAGS ${flag})
	endif()
  else()
    sm_append_simple_target_property(${target} LINK_FLAGS ${flag})
  endif()
endfunction()

function(disable_project_warnings projectName)
  if (MSVC)
    sm_add_compile_flag(${projectName} "/W0")
  elseif(APPLE)
    set_target_properties(${projectName} PROPERTIES XCODE_ATTRIBUTE_GCC_WARN_INHIBIT_ALL_WARNINGS "YES")
  else()
    set_target_properties(${projectName} PROPERTIES COMPILE_FLAGS "-w")
  endif()
endfunction()