StateMachine leads to undefined symbol _main when building a shared lib on iOS

Creating a cmake project to build a simple shared lib for iOS, after that adding Qt::StateMachine usage into cmake:

cmake_minimum_required(VERSION 3.14) 

project(sharedlib LANGUAGES CXX) 

set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_AUTOUIC ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Core
find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Core StateMachine) 

add_library(sharedlib SHARED
    sharedlib_global.h
    sharedlib.cpp
    sharedlib.h) 

target_link_libraries(sharedlib PRIVATE Qt${QT_VERSION_MAJOR}::Core Qt::StateMachine)
target_compile_definitions(sharedlib PRIVATE SHAREDLIB_LIBRARY)

I got this linked issue:
 

Undefined symbols for architecture arm64:
 "_main", referenced from:
 user_main_trampoline() in libqios.a(qioseventdispatcher.mm.o)

After a while, I realized that the root cause is Qt::StateMachine depends on Qt::Gui and Qt::Gui requires a define main() method. I tried to remove this dependency in some cmake files inside <qt_install_path>/6.3.0/ios/lib/cmake/Qt6StateMachine/ folder, my build succeeds now.

I'm migrating from Qt 5.15.0 to 6.3.0 and I know you guys have added a feature of event transition into StateMachine module which depends on Gui module, but in theory, I think the core part of StateMachine should not depends on Gui. Can you please add a simple way to bypass this problem, like a build option to disable that dependency (to Gui) when I don't need it? Thanks!