编译时出现 ld returned 1 exit status这样的错误，如何解决 [复制链接]

编译时提示这句出错QTest::mouseClick ( this, Qt::LeftButton, 0, point,0);

main.o: In function `QTest::mouseEvent(QTest::MouseAction, QWidget*, Qt::MouseButton, QFlags<Qt::KeyboardModifier>, QPoint, int)':
/usr/include/QtTest/qtestmouse.h:70: undefined reference to `QTest::defaultMouseDelay()'
main.o: In function `qWait':
/usr/include/QtTest/qtestsystem.h:58: undefined reference to `QTest::qSleep(int)'
main.o: In function `QTest::mouseEvent(QTest::MouseAction, QWidget*, Qt::MouseButton, QFlags<Qt::KeyboardModifier>, QPoint, int)':
/usr/include/QtTest/qtestmouse.h:110: undefined reference to `QTest::qWarn(char const*)'
/usr/include/QtTest/qtestmouse.h:71: undefined reference to `QTest::defaultMouseDelay()'
collect2: ld returned 1 exit status
make: *** [movemouse] 错误 1
到时是什么回事啊，有哪位可以帮帮忙，我找了老半天还找不到时什么问题。

我也遇到过这样的问题，我也没有办法，我是重装了QT，后来好的

clean下工程，让后rebuild ，我的就是这么好的

一般把工程下的makefile相关的都删了 再编译就好了

QT += testlib  

谢谢版主了，果然管用。。

有时候是因为有一个进程在运行。。。重启qcreator