> Sorry, to be more specific about my concern; I like the idea of > exporting the W=* flags, then selectively applying them via > subdir-ccflags-y. I don't like the idea of supporting W=1 as defined > at a precise point in time via multiple date specific symbols. If > someone adds something to W=1, then they should need to ensure subdirs > build warning-free, so I don't think you need to "snapshot" W=1 based > on what it looked like on 20200930. Hi Nick That then contradicts what Masahiro Yamada said to the first version i posted: https://www.spinics.net/lists/netdev/msg685284.html > With this patch series applied, where should we add -Wfoo-bar? > Adding it to W=1 would emit warnings under drivers/net/ since W=1 is > now the default for the net subsystem. The idea with the date stamps was to allow new warnings to be added to W=1 without them immediately causing warnings on normal builds. You are saying that whoever adds a new warning to W=1 needs to cleanup the tree which is already W=1 clean? That might have the side effect that no more warnings are added to W=1 :-( Andrew
