Set include path for Qt moc files using CMake

[Sugiuro]

I'm trying to use CMake with Qt to deploy on Linux and Windows, but I can't manage to make a basic project architecture, with an src and include directory. Here's an example :

.
├── CMakeLists.txt
├── include
│   └── LoginUI.hpp
└── src
     ├── login.ui
     ├── LoginUI.cpp
     └── main.cpp

Here's the content of my CMakeLists.txt

cmake_minimum_required(VERSION 2.8.11)

project(testproject)

set(SRCS
    src/main.cpp
    src/LoginUI.cpp)

set(INCLUDE_DIR
    include
    .)

set(HEADERS
    include/LoginUI.hpp)

if (UNIX)
    set(CMAKE_PREFIX_PATH "/opt/Qt5.9.2/5.9.2/gcc_64/lib/cmake")
endif (UNIX)

# Find includes in corresponding build directories
set(CMAKE_INCLUDE_CURRENT_DIR ON)
# Instruct CMake to run moc automatically when needed.
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTOUIC ON)

# Find the QtWidgets library
find_package(Qt5Widgets)

# Tell CMake to create the helloworld executable
add_executable(helloworld ${SRCS})
target_include_directories(helloworld PUBLIC ${INCLUDE_DIR})

# Use the Widgets module from Qt 5.
target_link_libraries(helloworld Qt5::Widgets)

When I run cmake, it works perfectly, but when I try to run 'make', there's an error showing that it searches for a header (here, LoginUI.hpp) in the 'src/' directory. I want it to search in the 'include/' directory. Is it possible ?

Here's the exact error message :

[ 20%] Automatic moc and uic for target helloworld
AUTOGEN: error: .../src/LoginUI.cpp The file includes the moc file "moc_LoginUI.cpp", but could not find header "LoginUI{.h,.hh,.h++,.hm,.hpp,.hxx,.in,.txx}" in .../src/

[VRonin]

https://stackoverflow.com/questions/13703647/how-to-properly-add-include-directories-with-cmake

[Sugiuro]

Thanks for your answer, it worked nicely !