RC_ICONS=appimage.ico
unix|win32: LIBS += -L$$PWD/opencv455/vc15/lib/ -lopencv_world455
INCLUDEPATH += $$PWD/opencv455/include
DEPENDPATH += $$PWD/opencv455/include
RC_ICONS 为指定图标文件，只写图标名appimage.ico，那么一般和pro文件在同一目录
$$PWD的意思为.pro文件所在的目录
如pro文件中：INCLUDEPATH += $$PWD/opencv455/include
$$quote关键字为在pro文件中加入带空格的路径
如：
- 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)