解决板卡插入usb摄像头上电，打不开摄像头的问题

liyujie

2025-08-29 87c7c0d90966d729ca3d39cbfca77a39a43960eb

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$(warning foo)
 
define baz
b
a
z
endef
 
test:
    $(warning bar'""')
    $(warning $(baz))
    echo PASS