[cmake-developers] CMP0071

[Sebastian Holtermann]

On Dienstag, 26. September 2017 09:25:36 CEST clinton at elemtech.com wrote:
> ----- On Sep 26, 2017, at 9:07 AM, Sebastian Holtermann seblist at xwmw.org 
wrote:
> >> I updated and I'm getting this:
> >> 
> >> CMake Warning (dev) in claro/navigation5/CMakeLists.txt:
> >> Policy CMP0071 is not set: Let AUTOMOC and AUTOUIC process GENERATED
> >> files.
> >> Run "cmake --help-policy CMP0071" for policy details. Use the
> >> cmake_policy
> >> command to set the policy and suppress this warning.
> >> 
> >> AUTOMOC: Ignoring GENERATED header file(s):
> >> 
> >> "/path/to/ui_SomeFile.h"
> >> "/path/to/qrc_AnotherFile.cpp"
> >> 
> >> 
> >> Those ui_* and qrc_* files do not require processing by moc.
> >> In this case, I was using qt5_wrap_ui() and qt5_add_resources().
> >> 
> >> I did an experiment and replaced qt5_wrap_ui() with autouic, and the
> >> warning went away for those ui_* files.
> >> 
> >> Is there a way to not print out that policy warning on ui_* and qrc_*
> >> files
> >> when using qt5_wrap_ui()/qt5_add_resources()? These are the only file
> >> types
> >> for which I'm getting that warning.
> > 
> > You can set the source file property SKIP_AUTOMOC on the GENERATED files.
> > See: https://cmake.org/cmake/help/v3.9/prop_sf/SKIP_AUTOMOC.html
> > See: https://cmake.org/cmake/help/git-master/policy/CMP0071.html
> > 
> > For example like this
> > ```
> > set_property(SOURCE /path/to/ui_SomeFile.h PROPERTY SKIP_AUTOMOC ON)
> > set_property(SOURCE /path/to/qrc_AnotherFile.cpp PROPERTY SKIP_AUTOMOC ON)
> > ```
> 
> Would it make sense for qt5_wrap_ui() and qt5_add_resources() to set
> SKIP_AUTOMOC on the ui_* and qrc_* files?

That would be the best solution. The macros are provided by Qt though and not 
by CMake.