C++ ZED Camera:对sl:：string:：string（）的未定义引用

我正在尝试使用QT编译hello zed示例，而不使用cmake，这是我的代码：

#include <sl/Camera.hpp>
#include <opencv2/opencv.hpp>
using namespace std;
using namespace sl;

int main(int argc, char **argv) {

    // Create a ZED camera object
    Camera zed;

    // Open the camera
    ERROR_CODE returned_state = zed.open();
    if (returned_state != ERROR_CODE::SUCCESS) {
        std::cout << "Error " << returned_state << ", exit program.\n";
        return EXIT_FAILURE;
    }

    // Get camera information (ZED serial number)
    auto camera_infos = zed.getCameraInformation();
    printf("Hello! This is my serial number: %d\n", camera_infos.serial_number);

    // Close the camera
    zed.close();
    return EXIT_SUCCESS;
}

我知道问题出在链接过程中，但我不知道该怎么办

error: undefined reference to `sl::String::~String()'