C++ cmake 找不到 qt 5.1.1
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/18722329/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
cmake does not find qt 5.1.1
提问by Amazonasmann
I just installed the Qt 5.1.1 for Windows 32-bit (MinGW 4.8, OpenGL) and tried to add it to my cmake. But CMake just does not want to find it and i dont know why. What am i missing? Do i need to set an environment variable or something?
我刚刚为 Windows 32 位（MinGW 4.8，OpenGL）安装了 Qt 5.1.1，并尝试将其添加到我的 cmake 中。但 CMake 只是不想找到它，我不知道为什么。我错过了什么？我需要设置环境变量还是什么？
Here is my cmake :
这是我的 cmake ：
cmake_minimum_required( VERSION 2.8.11 )
PROJECT(Blemmer)
# Find includes in corresponding build directories
set(CMAKE_INCLUDE_CURRENT_DIR ON)
# Instruct CMake to run moc automatically when needed.
set(CMAKE_AUTOMOC ON)
# Detect and add SFML
set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/Modules" ${CMAKE_MODULE_PATH})
set( CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin )
set( CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib )
find_package(SFML REQUIRED system window graphics network audio)
# The QUIET option disables messages if the package cannot be found.
FIND_PACKAGE(Qt5Widgets)
add_subdirectory(Entity)
add_subdirectory(Engine)
add_subdirectory(Game)
add_executable(Blemmer main.cpp)
include_directories(${SFML_INCLUDE_DIR} ${PROJECT_SOURCE_DIR})
target_link_libraries(Blemmer ${SFML_LIBRARIES} Game Engine Qt5::Widgets)
and this is the output of cmake-gui :
这是 cmake-gui 的输出：
CMake Warning at CMakeLists.txt:14 (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.
回答by micfan
I successly build my GUI on MacOSX 10.10 by exporting Linux environment variables
我通过导出 Linux 环境变量在 MacOSX 10.10 上成功构建了我的 GUI
$ brew install qt5
$ ls /usr/local/opt/qt5/lib/cmake/Qt5Widgets/Qt5WidgetsConfig.cmake
$ /usr/local/opt/qt5/lib/cmake/Qt5Widgets/Qt5WidgetsConfig.cmake
$ export CMAKE_PREFIX_PATH=/usr/local/opt/qt5/
$ cd ./build
$ cmake ../CMakeLists.txt
$ make -j8
Acroding to http://www.cmake.org/cmake/help/v3.0/variable/CMAKE_PREFIX_PATH.html, the cmake function FIND_LIBRARY() will appends /lib to each of the directories. So done.
根据http://www.cmake.org/cmake/help/v3.0/variable/CMAKE_PREFIX_PATH.html，cmake 函数 FIND_LIBRARY() 将appends /lib to each of the directories。就这样完成了。
回答by lpapp
You need to set the CMAKE_PREFIX_PATH to the Qt installation.
您需要将 CMAKE_PREFIX_PATH 设置为 Qt 安装。
回答by pzrq
Fixed it with the following in a CMakeLists.txtfile:
使用CMakeLists.txt文件中的以下内容修复它：
set(CMAKE_PREFIX_PATH $ENV{HOME}/Qt5.5.0/5.5/gcc_64)
For me, the context ended up something like:
对我来说，上下文最终是这样的：
# Ubuntu 14.04 LTS, CMake 2.8.12.2
wget http://download.qt.io/official_releases/qt/5.5/5.5.0/qt-opensource-linux-x64-5.5.0.run
chmod u+x qt-opensource-linux-x64-5.5.0.run
./qt-opensource-linux-x64-5.5.0.run
# Follow GUI prompts, installed to default location
