linux CMAKE_PREFIX_PATH无法帮助CMake查找Qt5

zqdjd7g9 于 2023-06-05 发布在 Linux

关注(0)|答案(7)|浏览(517)

从这里：https://stackoverflow.com/a/28327499/462608

我试过了：

cmake_minimum_required(VERSION 2.8.12)

project(qtquick_hello_cmake)

set(CMAKE_PREFIX_PATH "/opt/Qt5.9.1/5.9.1/")

set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)

find_package(Qt5 COMPONENTS Quick Core REQUIRED)

qt5_add_resources(RESOURCES qml.qrc)

add_executable(${PROJECT_NAME} "main.cpp" "qml.qrc")

qt5_use_modules(${PROJECT_NAME} Quick Core)

target_link_libraries(${PROJECT_NAME} Qt5::Core Qt5::Quick)

这里是cmake .的输出

:~/junk/qtquick_hello_cmake$ cmake .
CMake Error at CMakeLists.txt:11 (find_package):
  By not providing "FindQt5.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "Qt5", but
  CMake did not find one.

  Could not find a package configuration file provided by "Qt5" with any of
  the following names:

    Qt5Config.cmake
    qt5-config.cmake

  Add the installation prefix of "Qt5" to CMAKE_PREFIX_PATH or set "Qt5_DIR"
  to a directory containing one of the above files.  If "Qt5" provides a
  separate development package or SDK, be sure it has been installed.

-- Configuring incomplete, errors occurred!
See also "/home/.../junk/qtquick_hello_cmake/CMakeFiles/CMakeOutput.log".

这是为了证明/opt/Qt5.9.1/确实存在

:~/junk/qtquick_hello_cmake$ cd /opt/Qt5.9.1/5.9.1/
:/opt/Qt5.9.1/5.9.1$ ls
android_armv7  android_x86  gcc_64  Src

这里我使用-DCMAKE选项运行cmake，但输出仍然相同：

:~/junk/qtquick_hello_cmake$ cmake -DCMAKE_PREFIX_PATH=/opt/Qt5.9.1/5.9.1/ -DWITH_QT5=1 .
CMake Error at CMakeLists.txt:11 (find_package):
  By not providing "FindQt5.cmake" in CMAKE_MODULE_PATH this project has
  asked CMake to find a package configuration file provided by "Qt5", but
  CMake did not find one.

  Could not find a package configuration file provided by "Qt5" with any of
  the following names:

    Qt5Config.cmake
    qt5-config.cmake

  Add the installation prefix of "Qt5" to CMAKE_PREFIX_PATH or set "Qt5_DIR"
  to a directory containing one of the above files.  If "Qt5" provides a
  separate development package or SDK, be sure it has been installed.

-- Configuring incomplete, errors occurred!
See also "/home/.../junk/qtquick_hello_cmake/CMakeFiles/CMakeOutput.log".

目录内容：

:~/junk/qtquick_hello_cmake$ ls
CMakeCache.txt  CMakeFiles  CMakeLists.txt  main.cpp  main.qml  qml.qrc

linux

来源：https://stackoverflow.com/questions/47647035/cmake-prefix-path-doesnt-help-cmake-in-finding-qt5

7条答案

按热度按时间

sr4lhrrt1#

我安装了以下缺少的软件包：

sudo apt-get install qtbase5-dev
sudo apt-get install qtdeclarative5-dev

现在不需要附加任何类型的前缀：

CMakeList：

:~/junk/qtquick_hello_cmake$ cat CMakeLists.txt
    cmake_minimum_required(VERSION 2.8.12)
    
    project(qtquick_hello_cmake)
    
    set(CMAKE_INCLUDE_CURRENT_DIR ON)
    set(CMAKE_AUTOMOC ON)
    set(CMAKE_AUTORCC ON)
    
    find_package(Qt5 COMPONENTS Quick Core REQUIRED)
    
    qt5_add_resources(RESOURCES qml.qrc)
    
    add_executable(${PROJECT_NAME} "main.cpp" "qml.qrc")
    
    qt5_use_modules(${PROJECT_NAME} Quick Core)
    
    target_link_libraries(${PROJECT_NAME} Qt5::Core Qt5::Quick)

新增输出：

:~/junk/qtquick_hello_cmake$ ls
build  CMakeLists.txt  main.cpp  main.qml  qml.qrc

:~/junk/qtquick_hello_cmake$ cd build/
:~/junk/qtquick_hello_cmake/build$ rm -rf *

:~/junk/qtquick_hello_cmake/build$ cmake ../
-- The C compiler identification is GNU 4.8.4
-- The CXX compiler identification is GNU 4.8.4
-- Check for working C compiler: /usr/bin/cc
-- Check for working C compiler: /usr/bin/cc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Configuring done
-- Generating done
-- Build files have been written to: /home/.../junk/qtquick_hello_cmake/build

错误现在消失了。
感谢：
https://answers.ros.org/question/236324/could-not-find-a-package-configuration-file-provided-by-qt5widgets/
https://askubuntu.com/questions/508503/whats-the-development-package-for-qt5-in-14-04

赞(0）回复(0）举报 2023-06-05

qaxu7uf22#

对于macOS，在终端中导出以下变量。

export CMAKE_PREFIX_PATH=/usr/local/Cellar/qt5/5.15.1/

可能有另一个版本，请检查您拥有的版本，并相应地更改最后一个路径组件。
发出构建重新配置

cmake ../

赞(0）回复(0）举报 2023-06-05

5tmbdcev3#

我最近遇到了这个问题，我通过将此添加到产生此错误的任何CMakeLists.txt来解决此问题：

set(Qt5_DIR "*PATH TO YOUR QT QT5CONFIG FILE HERE*" CACHE PATH "Initial cache" FORCE)

赞(0）回复(0）举报 2023-06-05

bpsygsoo4#

另一种解决方案，例如，如果您在主目录中手动安装了Qt（而不是使用系统目录），则可以在命令行中指定您想要使用的版本。示例：

cmake \
  -DCMAKE_BUILD_TYPE=Release \
  -DBUILD_SAMPLES=TRUE \
  -DBUILD_STATIC_QRC=TRUE \
  -DCMAKE_PREFIX_PATH=/home/anthony/Qt/5.15.2/gcc_64 \
  ..

请注意指定您使用的版本+目标系统。然后，Qt会在子目录中找到合适的配置文件。

赞(0）回复(0）举报 2023-06-05

t9eec4r05#

CMake有关find_package失败的错误消息并设置 CMAKE_PREFIX_PATH 变量
在CMAKE_PREFIX_PATH中添加安装前缀“Qt5”
有点误导人它只谈到了“安装前缀”，但这个安装仍然要求包含Qt5Config.cmake或qt5-config.cmake文件，以便被find_package发现。
但是信息
如果“Qt5”提供了单独的开发包或SDK，请确保已安装。
很清楚：
需要安装一个包含所需配置文件的开发包。
以上所有内容仅适用于find_package的 CONFIG 模式，当CMake和使用此命令的CMake项目都没有提供“Find”脚本时。

赞(0）回复(0）举报 2023-06-05

iovurdzv6#

几年后，我在使用新的Android NDK工具链时遇到了类似的问题。这里提供的解决办法是不够的。我发现了一个新的方法，并在这里发布了以下内容：

$ cmake --log-level=DEBUG --debug-find <SRC_DIR>

这将打印出CMake找到包文件的查找过程。

赞(0）回复(0）举报 2023-06-05

jxct1oxe7#

对于MacOS，我使用CMake应用程序通过将“Where is source code”设置为我的cpp文件的目录，并将“Where to build the binaries”设置为build文件夹来澄清Qt5_DIR。然后，输入“/usr/local/Cellar/qt@5/5.15.8_3/lib/cmake/Qt”作为实际的Qt5_DIR值。随着新更新的发布，目录可能会随着时间的推移而更改，因此您每次都必须手动查找Qt5Config.cmake文件以更新Qt5_DIR

赞(0）回复(0）举报 2023-06-05

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linux CMAKE_PREFIX_PATH无法帮助CMake查找Qt5

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