#include<QtSql>#include<QtGui/QApplication>#include"widget.h"intmain(intargc,char*argv[]){QApplicationa(argc,argv);Widgetw;w.show();returna.exec();}这是我的主函数文件,在.pro中已经加了QT+=sql。编译时出现:error: cannot find -lmysql error: collect2: ld returned 1 exit status 求大神指点。多谢了