c++ - full - Cómo encontrar el módulo Qt5 CMake en Windows

qt full

Question

Estoy tratando de hacer una aplicación Qt5 muy básica usando CMake en Windows. Usé la documentación de Qt5 para usar CMake , y mi archivo main.cpp solo contiene una función main .

Mi CMakeLists.txt es exactamente:

cmake_minimum_required(VERSION 2.8.9)
project(testproject)

Solución EDIT

set (CMAKE_PREFIX_PATH "C://Qt//Qt5.0.1//5.0.1//msvc2010//")

finalizar EDIT

# Find includes in corresponding build directories
set(CMAKE_INCLUDE_CURRENT_DIR ON)
# Instruct CMake to run moc automatically when needed.
set(CMAKE_AUTOMOC ON)
# Find the QtWidgets library
find_package(Qt5Widgets)
# Tell CMake to create the helloworld executable
add_executable(helloworld hello.cpp)
# Use the Widgets module from Qt 5.
qt5_use_modules(helloworld Widgets)

Cuando en MSysGit bash, escribo `$ cmake -G" Visual Studio 11 "

Obtengo esta salida:

$ cmake -G"Visual Studio 11"
-- The C compiler identification is MSVC 17.0.60204.1
-- The CXX compiler identification is MSVC 17.0.60204.1
-- Check for working C compiler using: Visual Studio 11
-- Check for working C compiler using: Visual Studio 11 -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler using: Visual Studio 11
-- Check for working CXX compiler using: Visual Studio 11 -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
CMake Warning at CMakeLists.txt:11 (find_package):
By not providing "FindQt5Widgets.cmake" in CMAKE_MODULE_PATH this project
has asked CMake to find a package configuration file provided by
"Qt5Widgets", but CMake did not find one.
Could not find a package configuration file provided by "Qt5Widgets" with
any of the following names:
Qt5WidgetsConfig.cmake
qt5widgets-config.cmake
Add the installation prefix of "Qt5Widgets" to CMAKE_PREFIX_PATH or set
"Qt5Widgets_DIR" to a directory containing one of the above files. If
"Qt5Widgets" provides a separate development package or SDK, be sure it has
been installed.
CMake Error at CMakeLists.txt:17 (qt5_use_modules):
Unknown CMake command "qt5_use_modules".
-- Configuring incomplete, errors occurred!

¿Tienes alguna idea?

Answer 1

Añadir esto resuelve el problema.

set (CMAKE_PREFIX_PATH "C://Qt//Qt5.0.1//5.0.1//msvc2010//")

Edité el primer post.

Answer 2

Aquí hay una técnica que aprovecha la capacidad de cmake de leer el registro para forzar a un valor de registro a ubicar el Qt5Config.cmake del Qt5Config.cmake .

Intenta usar la versión más alta de Qt5 disponible haciendo una ordenación inversa en los diferentes nombres de carpeta "5.x" que se encuentran dentro (por ejemplo, C:/Qt/ ).

Esto también podría colocarse dentro de un módulo, por ejemplo, QtLocator.cmake .

SET(QT_MISSING True)
# msvc only; mingw will need different logic
IF(MSVC)
# look for user-registry pointing to qtcreator
GET_FILENAME_COMPONENT(QT_BIN [HKEY_CURRENT_USER//Software//Classes//Applications//QtProject.QtCreator.cpp//shell//Open//Command] PATH)
# get root path so we can search for 5.3, 5.4, 5.5, etc
STRING(REPLACE "/Tools" ";" QT_BIN "${QT_BIN}")
LIST(GET QT_BIN 0 QT_BIN)
FILE(GLOB QT_VERSIONS "${QT_BIN}/5.*")
LIST(SORT QT_VERSIONS)
# assume the latest version will be last alphabetically
LIST(REVERSE QT_VERSIONS)
LIST(GET QT_VERSIONS 0 QT_VERSION)
# fix any double slashes which seem to be common
STRING(REPLACE "//" "/" QT_VERSION "${QT_VERSION}")
# do some math trickery to guess folder
# - qt uses (e.g.) "msvc2012"
# - cmake uses (e.g.) "1800"
# - see also https://cmake.org/cmake/help/v3.0/variable/MSVC_VERSION.html
MATH(EXPR QT_MSVC "2000 + (${MSVC_VERSION} - 600) / 100")
# check for 64-bit os
# may need to be removed for older compilers as it wasn''t always offered
IF(CMAKE_SYSTEM_PROCESSOR MATCHES 64)
SET(QT_MSVC "${QT_MSVC}_64")
ENDIF()
SET(QT_PATH "${QT_VERSION}/msvc${QT_MSVC}")
SET(QT_MISSING False)
ENDIF()
# use Qt_DIR approach so you can find Qt after cmake has been invoked
IF(NOT QT_MISSING)
MESSAGE("-- Qt found: ${QT_PATH}")
SET(Qt5_DIR "${QT_PATH}/lib/cmake/Qt5/")
SET(Qt5Test_DIR "${QT_PATH}/lib/cmake/Qt5Test")
ENDIF()

Y entonces..

# finally, use Qt5 + COMPONENTS technique, compatible with Qt_DIR
FIND_PACKAGE(Qt5 COMPONENTS Core Gui Widgets Xml REQUIRED)

Answer 3

Debería establecer la variable de entorno CMAKE_PREFIX_PATH en su lugar o usar cmake-gui para establecer la ruta de los paquetes Qt 5.

Answer 4

Solo necesita agregar la ruta Qt a la variable Windows% PATH%. Como se sugiere en la documentación oficial: http://doc.qt.io/qt-4.8/install-win.html#step-3-set-the-environment-variables

Answer 5

Una forma es abrir CMakeLists.txt en Qt Creator. Qt Creator admite CMake de forma nativa y siempre sabe dónde está Qt.