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QT开发--《Beginning Linux Programming》4th Edition

最近在学习《Beginning Linux Programming》4th Edition的时候,将下面的例子代码键入

#include<qapplication.h>
#include<qmainwindow.h>

 int main(int argc,char* args[])
{
   QApplication app(argc,args);
   QMainWindow *window=new QMainWindow();
   app.setMainWidget(window);
   window->show();
  return app.exec();
}

按照 $g++ -o QWindow QWindow.cpp -I$QTDIR/include -L$QTDIR/lib -lqui 编译方式出现了如下的错误:

/usr/bin/ld: /tmp/ccizdZj7.o: undefined reference to symbol ‘_ZN7QWidget14setFocusPolicyENS_11FocusPolicyE‘
/usr/bin/ld: note: ‘_ZN7QWidget14setFocusPolicyENS_11FocusPolicyE‘ is defined in DSO /usr/lib64/qt-3.3/lib/libqt-mt.so.3 so try adding it to the linker command line
 /usr/lib64/qt-3.3/lib/libqt-mt.so.3: could not read symbols: Invalid operation
 collect2: error: ld returned 1 exit status

根据提示,直接将 /usr/lib64/qt-3.3/lib/libqt-mt.so.3作为输入,则可以正常编译成功。
$ g++ -o QWindow QWindow.cpp -I$QTDIR/include -L$QTDIR/lib -lqui $QTDIR/lib/libqt-mt.so.3
PS:在阅读本书的过程中,在中文版第四版的p427:
$./thread3a的输出部分:
FAST输入后,应该输出的是两句“You input 7 characters”
You input 7 characters
You input 7 characters
而不是书中的三句:
You input 7 characters
You input 7 characters
You input 7 characters
正在学习linux相关的知识,希望大家一起交流,共同进步。。。。

QT开发--《Beginning Linux Programming》4th Edition