Qt找不到第三方库

win32: LIBS += -LE:/3rd/OSG-VS2017-msvc64/install/lib/ -losg
win32: LIBS += -LE:/3rd/OSG-VS2017-msvc64/install/lib/ -losgGA
win32: LIBS += -LE:/3rd/OSG-VS2017-msvc64/install/lib/ -losgDB
win32: LIBS += -LE:/3rd/OSG-VS2017-msvc64/install/lib/ -losgViewer
win32: LIBS += -LE:/3rd/OSG-VS2017-msvc64/install/lib/ -losgUtil
win32: LIBS += -LE:/3rd/OSG-VS2017-msvc64/install/lib/ -losgQOpenGL -losgParticle -losgPresentation -lOpenThreads

INCLUDEPATH += E:/3rd/OSG-VS2017-msvc64/install/include
DEPENDPATH += E:/3rd/OSG-VS2017-msvc64/install/include

如上在.pro文件中INCLUDEPATH和DEPENDPATH 不能像上面一样路径前缀不能加-L，否则编译就提示找不到该库。