Error including Qt5 Network in CMakeLists.txt?

[marmoc]

I have very little experience with cmake, and I am struggling with including the modules I need to get the project building. In my .pro file I have the following inclusions:

QT += core gui widgets printsupport network

When I 'make' the result of running cmake, I get the following error.

fatal error: QHostAddress: No such file or directory

Here is my CMakeLists.txt file with some defining information removed. I am certain the error is occurring because I have not correctly included Qt Network, but I'm not sure exactly what I'm missing?

cmake_minimum_required(VERSION 2.8.12)
project(MyProject)
add_definitions(-std=c++11)

find_package(Qt5Widgets REQUIRED)
find_package(Qt5PrintSupport REQUIRED)
find_package(Qt5Network REQUIRED)

include_directories(${Qt5Widgets_INCLUDE_DIRS})
add_definitions(${Qt5Widgets_DEFINITIONS})

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${Qt5Widgets_EXECUTABLE_COMPILE_FLAGS}")

SET(CMAKE_INCLUDE_CURRENT_DIR ON)

SET(MAIN main.cpp)
SET(MYPROJECTSOURCE ...cpp)
SET(MYPROJECTHEADERS ....h)

SET(MYPROJECTUI ...ui)

qt5_wrap_cpp(HEADERSMOC ${MYPROJECTHEADERS})
qt5_wrap_ui (UIMOC  ${MYPROJECTUI})

include_directories(${PROJECT_SOURCE_DIR})
include_directories(${PROJECT_BINARY_DIR})

add_library(MYPROJECTLIB SHARED
    ${MYPROJECTSOURCE}
    ${HEADERSMOC}
    ${UIMOC}
)

target_link_libraries(MYPROJECTLIB Qt5::Widgets)

add_executable(MyProject ${MAIN})
target_link_libraries(MyProject MYPROJECTLIB)
target_link_libraries(MyProject Qt5::PrintSupport)
target_link_libraries(MyProject Qt5::Network)

[SGaist]

Hi and welcome to devnet,

Did you add the network module after having already configured your project ?

Which version of cmake are you using ?

By the way, you shouldn't need most these old Qt specific stuff you have currently. See the CMake manuel in Qt's documentation.

[stackprogramer]

Hi, for making Qt project you have two option:
1-one using qmake that it can find usually Qt parts library.
2-cmake ,cmake can not find your files.cmake for your project:
your post can be better with describing completely errors not part of it .
for example for using from QtCore, cmake should find QtCoreConfig.cmake

cmake will be need it.........
so you shoud set CMAKE_PREFIX_PATH to cmake files directory......!
in linux you should type :

export CMAKE_PREFIX_PATH="QTPTH/..../lib/cmake"

[Konstantin Tokarev]

You've added only Qt5Widgets to your target, so it cannot use Qt5Network

[marmoc]

@SGaist said in Error including Qt5 Network in CMakeLists.txt?:

Did you add the network module after having already configured your project ?

I'm not sure I understand this? Can you elaborate?

Which version of cmake are you using ?

cmake version is 3.5.1

Thanks!

[SGaist]

@Konstantin-Tokarev has a point, if you are using QHostAddress in your library target, you forgot to link against Qt5::network

I was meaning that if you configured your project once and after that you added the dependency to the network module, you would likely need to do a full reconfigure of your project.