没有找到LibudeV开发包



我正在编写一个应用程序自动检索设备已插入/插入。

我将C 与QT框架一起使用。 libudev.h 包含在我的代码中。实际上,我通过sudo apt-get install libudev-dev成功安装了LibudeV-Dev软件包,但是QTCreator仍然有一个错误消息:libudev development package not found

文件.pro:

...
CONFIG   += console c++11
CONFIG   -= app_bundle
unix: CONFIG += link_pkgconfig
unix: PKGCONFIG += libudev
HEADERS += DeviceManager.h
SOURCES += main.cpp 
  DeviceManager.cpp
...

devicemanager.h文件:

#ifndef DEVICEMANAGER_H
#define DEVICEMANAGER_H
#include <QObject>
#include <QDebug>
#include <QSet>
#include <libudev.h>
#include "DeviceModel.h"
class DeviceManager : public QObject
{
    Q_OBJECT
public:
    explicit DeviceManager(QObject *parent = 0);
    QSet<DeviceModel *> getDevices();
    QStringList getDevicePaths();
private:
    QSet<DeviceModel *> pluggedDevices;
};
#endif // DEVICEMANAGER_H

devicemanager.cpp文件:

#include "DeviceManager.h"
DeviceManager::DeviceManager(QObject *parent) :
    QObject(parent)
{
}
QSet<DeviceModel *> DeviceManager::getDevices()
{
    QSet<DeviceModel *> devices = QSet<DeviceModel *>();
    struct udev *udev;
    struct udev_enumerate *enumerate;
    struct udev_list_entry *dev_list, *dev_list_entry;
    struct udev_device *dev;
    struct udev_monitor *mon;
    /* Create the udev object */
    udev = udev_new();
    if (!udev)
    {
        qDebug() << "Can't create udev";
        return devices;
    }
    /* Set up a monitor to monitor hidraw devices */
    mon = udev_monitor_new_from_netlink(udev, "udev");
    udev_monitor_filter_add_match_subsystem_devtype(mon, "usb", "usb_device");
    udev_monitor_enable_receiving(mon);
    enumerate = udev_enumerate_new(udev);
    udev_enumerate_add_match_subsystem(enumerate, "usb");
    udev_enumerate_scan_devices(enumerate);
    dev_list = udev_enumerate_get_list_entry(enumerate);
    QString vendorID, serialNumber, devName, deviceName;
    udev_list_entry_foreach(dev_list_entry, dev_list)
    {
        const char *path;
        path = udev_list_entry_get_name(dev_list_entry);
        dev = udev_device_new_from_syspath(udev, path);
        udev_device_get_parent_with_subsystem_devtype(dev, "usb", "usb_device");
        if (!dev)
        {
            qDebug() << "Unable to find parent usb device.";
            return devices;
        }
        vendorID = udev_device_get_property_value(dev, "ID_VENDOR_ID");
        devName = udev_device_get_property_value(dev, "DEVNAME");
        if (!vendorID.isNull() && vendorID.compare("04e8") == 0)    // vendor ID of Samsung devices
        {
                DeviceModel *device = new DeviceModel();
                serialNumber = udev_device_get_property_value(dev, "ID_SERIAL_SHORT");
                deviceName = QString(udev_device_get_property_value(dev, "DEVPATH")).split("/").last();
                if (!serialNumber.isNull())
                {
                    device->setDownloadMode(false);
                    device->setSerialNumber(serialNumber);
                }
                else if(!devName.isNull())
                {
                    device->setPath(devName);
                    device->setDownloadMode(true);
                }
                else
                    break;
                device->setName(deviceName);
                devices.insert(device);
        }
        udev_device_unref(dev);
    }
    /* Free the enumerator object */
    udev_enumerate_unref(enumerate);
    udev_unref(udev);
    this->pluggedDevices = devices;
    return devices;
}
QStringList DeviceManager::getDevicePaths()
{
    QStringList result;
    if (this->pluggedDevices.isEmpty())
    {
        return result;
    }
    foreach (DeviceModel *device, this->pluggedDevices)
    {
        result.append(device->getPath());
    }
    return result;
}

环境:

OS:Ubuntu 18.04.2 LTS

QT创建者4.5.2基于QT 5.9.5(GCC 7.3.0,64bit(

您能帮我找到一个原因吗?

错误消息表明您要么缺少libudev-devpkg-config。由于您已经安装了libudev-dev,因此这意味着您缺少的是pkg-config工具。如果命令:

pkg-config --version

不打印以下内容:

0.29.1

然后您缺少pkg-config工具。安装它:

sudo apt install pkg-config

这应该解决您的问题。切记从项目文件中删除LIBS += -ludev。您只需要PKGCONFIG += libudev

我使用它,它就像魅力

一样起作用
sudo apt-get install libudev-dev

另一个是这个,我在互联网上找到了它,但没有尝试过。

build/install-build-deps.sh

您需要将其安装到系统中。您只需尝试这些命令

sudo apt -get更新-y

sudo apt-get安装-y libudev-dev

如果在安装libudev-devpkg-config后仍然存在问题,请检查另一件事是是否使用了正确的pkg-config。运行which pkg-config,对于Ubuntu,应该说/usr/bin/pkg-config。对我来说,这是错误的/home/linuxbrew/.linuxbrew/bin/pkg-config,这是由于我的PATH上的/home/linuxbrew/.linuxbrew/bin/。然后,我从我的PATH中删除了Linuxbrew Bin文件夹,并且错误消失了。

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