CMP0071

Let AUTOMOC and AUTOUIC process GENERATED files.

Since version 3.10, CMake processes regular and GENERATED source files in AUTOMOC and AUTOUIC. In earlier CMake versions, only regular source files were processed. GENERATED source files were ignored silently.

This policy affects how source files that are GENERATED get treated in AUTOMOC and AUTOUIC.

The OLD behavior for this policy is to ignore GENERATED source files in AUTOMOC and AUTOUIC.

The NEW behavior for this policy is to process GENERATED source files in AUTOMOC and AUTOUIC just like regular source files.

Source skip example:

# ...
set_property(SOURCE /path/to/file1.h PROPERTY SKIP_AUTOMOC ON)
set_property(SOURCE /path/to/file2.h PROPERTY SKIP_AUTOUIC ON)
set_property(SOURCE /path/to/file3.h PROPERTY SKIP_AUTOGEN ON)
# ...

This policy was introduced in CMake version 3.10. CMake version 3.19.0-rc3 warns when the policy is not set and uses OLD behavior. Use the cmake_policy() command to set it to OLD or NEW explicitly.