更新了Qt库;无法再构建了

Updated Qt library; cannot build anymore

本文关键字：构建 Qt 更新      更新时间：2023-10-16

我有一个以前工作的Qt5/cmake项目，它构建得很好。然后我将Qt从5.6更新到5.8。现在cmake再也找不到Qt了。

这是我CMakeLists.txt文件：

cmake_minimum_required(VERSION 3.0)
project(TEST)
set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_PREFIX_PATH "/opt/Qt/Qt5.8.0")
set(QT_QMAKE_EXECUTABLE ${CMAKE_PREFIX_PATH}/5.8/clang_64/bin/qmake)
find_package(Qt5Widgets)
...

这是我收到的错误消息：

CMake Warning at CMakeLists.txt:56 (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.

我遵循了Qt文档中写的内容，所以我不明白出了什么问题。

版本详情：
- cmake 3.9.0- Qt 5.8.0

- QMake 3.1
- Mac OS X 10.9.5

您是否检查过与QT兼容的CMake版本？你也检查过qmake一切正常吗？因为这是大多数时候导致问题的原因。检查QT_QMAKE_EXECUTABLE指向新的 QT 版本，我一直遇到新版本的 QT 问题。

修复了设置以下系统变量的问题：

QTDIR=/opt/Qt/Qt5.8.0/5.8/clang_64
PATH=$PATH:/opt/Qt/Qt5.8.0/5.8/clang_64/bin

并删除：

set(CMAKE_PREFIX_PATH "/opt/Qt/Qt5.8.0")

来自CMakeLists.txt。

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