CMP0100

Let AUTOMOC and AUTOUIC process header files that end with a .hh extension.

Since version 3.17, CMake processes header files that end with a .hh extension in AUTOMOC and AUTOUIC. In earlier CMake versions, these header files were ignored by AUTOMOC and AUTOUIC.

This policy affects how header files that end with a .hh extension get treated in AUTOMOC and AUTOUIC.

The OLD behavior for this policy is to ignore .hh header files in AUTOMOC and AUTOUIC.

The NEW behavior for this policy is to process .hh header files in AUTOMOC and AUTOUIC just like other header files.

# Source skip example:
set_property(SOURCE /path/to/file1.hh PROPERTY SKIP_AUTOMOC ON)
set_property(SOURCE /path/to/file2.hh PROPERTY SKIP_AUTOUIC ON)
set_property(SOURCE /path/to/file3.hh PROPERTY SKIP_AUTOGEN ON)

This policy was introduced in CMake version 3.17.0. 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.