Qt项目与自定义共享库交叉编译Qt

Qt project with custom shared library cross compile Qt

本文关键字：Qt 交叉编译 共享 自定义 项目      更新时间：2023-10-16

我构建了Qt 5.9.4，用于在Raspberry Pi 3上进行交叉编译。测试应用程序一切正常。我的问题如下：

在Qt Creator中创建静态库，名为SlaveDeviceModels。我将这个库部署到树莓上并在 rpi 上运行以下命令：

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/pi/Documents/QtProjectsTests/SmartHomeServer

然后我创建了名为 SmartHomeServer 的控制台应用程序项目，并添加到该项目外部库SlaveDeviceModels。然后我尝试通过Qt Creator运行此应用程序，但出现错误：

/home/pi/Documents/QtProjectsTests/SmartHomeServer/SmartHomeServer: error while loading shared libraries: libSlaveDeviceModels.so.1: cannot open shared object file: No such file or directory
Application finished with exit code 127.

所以我转到rpi文件夹，它如下所示：

pi@raspberrypi:~/Documents/QtProjectsTests/SmartHomeServer $ ls -l
total 3048
-rwxr-xr-x 1 pi pi 2122400 Mar 17 14:10 SmartHomeServer
-rw-r--r-- 1 pi pi    9006 Mar 17 14:04 SmartHomeServer.log
lrwxrwxrwx 1 pi pi      29 Mar 17 13:28 libSlaveDeviceModels.so -> libSlaveDeviceModels.so.1.0.0
lrwxrwxrwx 1 pi pi      29 Mar 17 13:28 libSlaveDeviceModels.so.1 -> libSlaveDeviceModels.so.1.0.0
lrwxrwxrwx 1 pi pi      29 Mar 17 13:28 libSlaveDeviceModels.so.1.0 -> libSlaveDeviceModels.so.1.0.0
-rwxr-xr-x 1 pi pi  980428 Mar 17 13:28 libSlaveDeviceModels.so.1.0.0

然后我尝试通过./SmartHomeServer运行此应用程序，它工作正常。它开始了。

唯一的问题是当我尝试从本地计算机上的Qt Creator启动SmartHomeServer时(交叉编译(。有没有人可以帮助我可能有问题的地方。也许Qt创建器中缺少设置？

这是我SmartHomeServer.pro文件：

QT += core
QT -= gui
CONFIG += c++11
TARGET = SmartHomeServer
CONFIG += console
CONFIG -= app_bundle
TEMPLATE = app
SOURCES += main.cpp
# The following define makes your compiler emit warnings if you use
# any feature of Qt which as been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS
# You can also make your code fail to compile if you use deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
# Default rules for deployment.
target.path = /home/pi/Documents/QtProjectsTests/SmartHomeServer
INSTALLS += target
# here are included my headers
INCLUDEPATH += $$PWD/../SlaveDeviceModels
# I tried do something like that
#LIBS += -L/home/pi/Documents/QtProjectsTests/SmartHomeServe -lSlaveDeviceModels
# that are default lines added by qt creator
unix:!macx: LIBS += -L$$PWD/../build-SlaveDeviceModels-Raspberry_Pi_3_Kit-Debug/ -lSlaveDeviceModels
INCLUDEPATH += $$PWD/../build-SlaveDeviceModels-Raspberry_Pi_3_Kit-Debug
DEPENDPATH += $$PWD/../build-SlaveDeviceModels-Raspberry_Pi_3_Kit-Debug

解决方法是将以下代码行添加到 .pro 文件中：

unix:!mac {
    LIBS += -Wl,-rpath=\$$ORIGIN/libs
}

因此，现在您可以将所有必需的库放在可执行文件的 libs 子文件夹中。

此方法在 Windows 或 Mac 上不是必需的。请记住将 qt.conf 文件用于 Qt 插件。问候。

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