- LIBS += -L$$quote(C:\Program Files (x86)\Microsoft SDKs\Windows\v7.1A\Lib)
- INCLUDEPATH += $$quote(C:\Program Files (x86)\Microsoft SDKs\Windows\v7.1A\Include)
http://blog.csdn.net/caoshangpa/article/details/53689038
Qt在pro文件中加入带空格的路径（使用$$quote关键字）
原文：http://www.cnblogs.com/findumars/p/6254574.html
