CMake & QT5 - QT5_WRAP_UI not generating ui header files

I have encountered the same issue on Mac OS X. Ui form header file is not generated.

I have solved my problem by generating manually .h file with QtDesigner. When changes are made on ui form, header file is well generated.

Note: if I add some others ui forms, headers are generated automatically without needed to generate header file manually for these others ui.

EDIT: header file is well generated at first build only if it isn't used into cpp code.

I was running in the same issue with cmake 3.2.2. Try using

SET(CMAKE_AUTOUIC ON)

if the ui files are not generated. Maybe the default behaviour changed recently?

Use lower-case CMake commands. That has been the sane convention for years.
Why are you using both AUTOMOC and qt5_wrap_cpp? AUTOMOC is designed to replace the macro. http://www.cmake.org/cmake/help/v3.0/manual/cmake-qt.7.html#automoc
If using CMake 2.8.11 or later, then don't use qt5_use_modules. I wrote that as a stop-gap hack until CMake 2.8.11 was released. The target_link_libraries command does what qt5_use_modules does, but better and more-generically. http://doc-snapshot.qt-project.org/qt5-5.3/cmake-manual.html
The library has no sources of its own and is not used. You're clearly 'doing it wrong' here. Move the ${calculator_FORMS_HEADERS} variable usage to the executables sources. Then after addressing point 2, remove the library.

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