Qt4Macros: Don't AUTOMOC or AUTOUIC qt4-generated files

Suppress AUTOMOC and AUTOUIC on files generated by Qt4 wrapping macros;
particularly, those generated by `qt4_wrap_cpp`, `qt4_wrap_ui`, and
`qt4_add_resources`.  None of these should need AUTOMOC or AUTOUIC
treatment, and CMP0071 makes it important to mark this explicitly.

Help/release/3.11.rst

@@ -292,3 +292,9 @@ Changes made since CMake 3.11.0 include the following.
   it did prior to 3.11.0.  This diagnostic was accidentally dropped
   from CMake 3.11.0 and 3.11.1 by the change to allow globally visible
   imported targets to be aliased.
+
+* The :module:`FindQt4` module ``qt4_wrap_cpp``, ``qt4_wrap_ui`` and
+  ``qt4_add_resources`` macros now set :prop_sf:`SKIP_AUTOMOC` and
+  :prop_sf:`SKIP_AUTOUIC` on their generated files.  These files never
+  need to be processed by moc or uic, and we must say so explicitly to
+  account for policy :policy:`CMP0071`.

Modules/Qt4Macros.cmake

@@ -152,6 +152,7 @@ macro (QT4_GENERATE_MOC infile outfile )
    endif()
    QT4_CREATE_MOC_COMMAND(${abs_infile} ${_outfile} "${moc_flags}" "" "${moc_target}")
    set_property(SOURCE ${outfile} PROPERTY SKIP_AUTOMOC TRUE)  # don't run automoc on this file
+   set_property(SOURCE ${outfile} PROPERTY SKIP_AUTOUIC TRUE)  # don't run autouic on this file
 endmacro ()
 
 
@@ -166,6 +167,8 @@ macro (QT4_WRAP_CPP outfiles )
     get_filename_component(it ${it} ABSOLUTE)
     QT4_MAKE_OUTPUT_FILE(${it} moc_ cxx outfile)
     QT4_CREATE_MOC_COMMAND(${it} ${outfile} "${moc_flags}" "${moc_options}" "${moc_target}")
+    set_property(SOURCE ${outfile} PROPERTY SKIP_AUTOMOC TRUE)  # don't run automoc on this file
+    set_property(SOURCE ${outfile} PROPERTY SKIP_AUTOUIC TRUE)  # don't run autouic on this file
     set(${outfiles} ${${outfiles}} ${outfile})
   endforeach()
 
@@ -185,6 +188,8 @@ macro (QT4_WRAP_UI outfiles )
       COMMAND Qt4::uic
       ARGS ${ui_options} -o ${outfile} ${infile}
       MAIN_DEPENDENCY ${infile} VERBATIM)
+    set_property(SOURCE ${outfile} PROPERTY SKIP_AUTOMOC TRUE)  # don't run automoc on this file
+    set_property(SOURCE ${outfile} PROPERTY SKIP_AUTOUIC TRUE)  # don't run autouic on this file
     set(${outfiles} ${${outfiles}} ${outfile})
   endforeach ()
 
@@ -233,6 +238,8 @@ macro (QT4_ADD_RESOURCES outfiles )
       ARGS ${rcc_options} -name ${outfilename} -o ${outfile} ${infile}
       MAIN_DEPENDENCY ${infile}
       DEPENDS ${_RC_DEPENDS} "${out_depends}" VERBATIM)
+    set_property(SOURCE ${outfile} PROPERTY SKIP_AUTOMOC TRUE)  # don't run automoc on this file
+    set_property(SOURCE ${outfile} PROPERTY SKIP_AUTOUIC TRUE)  # don't run autouic on this file
     set(${outfiles} ${${outfiles}} ${outfile})
   endforeach ()
 
@@ -267,6 +274,7 @@ macro(QT4_ADD_DBUS_INTERFACE _sources _interface _basename)
       DEPENDS ${_infile} VERBATIM)
 
   set_property(SOURCE ${_impl} PROPERTY SKIP_AUTOMOC TRUE)  # don't run automoc on this file
+  set_property(SOURCE ${_impl} PROPERTY SKIP_AUTOUIC TRUE)  # don't run autouic on this file
 
   QT4_GENERATE_MOC("${_header}" "${_moc}")
 
@@ -351,6 +359,7 @@ macro(QT4_ADD_DBUS_ADAPTOR _sources _xml_file _include _parentClass) # _optional
 
   QT4_GENERATE_MOC("${_header}" "${_moc}")
   set_property(SOURCE ${_impl} PROPERTY SKIP_AUTOMOC TRUE)  # don't run automoc on this file
+  set_property(SOURCE ${_impl} PROPERTY SKIP_AUTOUIC TRUE)  # don't run autouic on this file
   MACRO_ADD_FILE_DEPENDENCIES("${_impl}" "${_moc}")
 
   list(APPEND ${_sources} "${_impl}" "${_header}" "${_moc}")