Cpack fail for library depending on qtmqtt COMPONENT on windows

Mesrine

Hi everyone,

I have a cmake project that build a library that depends on Qt Components like Qt6::WebSockets and Qt6::Mqtt .

So the important part of the root cmake is like:

find_package(Qt6 COMPONENTS Core OPTIONAL_COMPONENTS WebSockets Mqtt)


if (Qt6_FOUND)
	qt_standard_project_setup()
	if(NOT TARGET Qt6::WebSockets)
		FetchContent_Declare(
			qtwebsockets
			GIT_REPOSITORY git://code.qt.io/qt/qtwebsockets.git
			GIT_TAG 6.5.0
			)
		FetchContent_MakeAvailable(qtwebsockets)
	endif()
	if(NOT TARGET Qt6::Mqtt)
		FetchContent_Declare(
			qtmqtt
			GIT_REPOSITORY git://code.qt.io/qt/qtmqtt.git
			GIT_TAG 6.5.0
			)
		FetchContent_MakeAvailable(qtmqtt)
	endif()

endif(Qt6_FOUND)

add_library(qclientMQTT include/client/qclientMQTT.hpp qclientMQTT.cpp src/qwebsocketiodevice.cpp include/client/qwebsocketiodevice.hpp)

...

if (Qt6_FOUND)
	target_link_libraries(qclientMQTT PUBLIC  Qt6::Core Qt6::Mqtt )
	target_link_libraries(qclientMQTT PRIVATE  Qt6::WebSockets)
endif(Qt6_FOUND)

So if it does not find the OPTIONAL_COMPONENTS WebSockets Mqtt, it will download them and built them.

The library compiles well for Windows, Macos and Linux.
I also create packages of the library by using CPack like:

cpack -B package --config CPackConfig.cmake

This works well for macos and linux returning(for linux):

CPack: Create package using STGZ
CPack: Install projects
CPack: - Install project: QtIotaClient []
CPack: Create package
CPack: - package: /home/runner/work/_temp/build/package/QtIotaClient-v0.1.1-Linux_5.15.0-1039-azure-x86_64-GNU.sh generated.
CPack: Create package using TGZ
CPack: Install projects
CPack: - Install project: QtIotaClient []
CPack: Create package
CPack: - package: /home/runner/work/_temp/build/package/QtIotaClient-v0.1.1-Linux_5.15.0-1039-azure-x86_64-GNU.tar.gz generated.
CPack: Create package using TZ
CPack: Install projects
CPack: - Install project: QtIotaClient []
CPack: Create package
CPack: - package: /home/runner/work/_temp/build/package/QtIotaClient-v0.1.1-Linux_5.15.0-1039-azure-x86_64-GNU.tar.Z generated.

but for windows it returns:

CPack: Create package using NSIS
CPack: Install projects
CPack: - Install project: QtIotaClient []
CPack: -   Install component: Devel
CPack: -   Install component: Unspecified
CPack: -   Install component: _install_html_docs_Mqtt
CMake Error at D:/a/_temp/build/_deps/qtmqtt-build/src/mqtt/cmake_install.cmake:118 (file):
  file INSTALL cannot find "D:/a/_temp/build/./doc/qtmqtt": File exists.
Call Stack (most recent call first):
  D:/a/_temp/build/_deps/qtmqtt-build/src/cmake_install.cmake:42 (include)
  D:/a/_temp/build/_deps/qtmqtt-build/cmake_install.cmake:42 (include)
  D:/a/_temp/build/cmake_install.cmake:81 (include)


CPack Error: Error when generating package: QtIotaClient

So for windows it is trying to install the documentation of the COMPONENT and other things and fails.

I would like that the COMPONENT library get packaged also and my library packaging finish. Any help on the later will be much appreciated.