qt 调用linux库

#include <QCoreApplication>
#include <QLibrary>
#include <QDebug>

typedef int (*MyFunctionType)(int, int);

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    // 加载动态库
    QLibrary myLib("libexample.so");
    if (!myLib.load()) {
        qWarning() << "Failed to load library:" << myLib.errorString();
        return -1;
    }

    // 获取函数指针
    MyFunctionType myFunction = (MyFunctionType)myLib.resolve("add");
    if (!myFunction) {
        qWarning() << "Failed to resolve function:" << myLib.errorString();
        return -1;
    }

    // 调用函数
    int result = myFunction(3, 4);
    qDebug() << "Result:" << result;

    return a.exec();
}

chmod 755 libexample.so

export LD_LIBRARY_PATH=/path/to/libraries:$LD_LIBRARY_PATH

nm -D libexample.so | grep add