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did you mean '-Wpacked-non-pod'? [-Wunknown-warning-option] > > warning: unknown warning option '-Wformat-overflow'; did you mean '-Wshift-overflow'? [-Wunknown-warning-option] > > warning: unknown warning option '-Wformat-truncation' [-Wunknown-warning-option] > > warning: unknown warning option '-Wstringop-overflow'; did you mean '-Wshift-overflow'? [-Wunknown-warning-option] > > warning: unknown warning option '-Wstringop-truncation'; did you mean '-Wstring-concatenation'? [-Wunknown-warning-option] > > I am not sure why these warnings are even showing up in the first place, > they are wrapped with cc-option, which should be catching that they are > not supported... Is 0day doing something funky with KCFLAGS? Thanks Nathan for pointing this out, we will fix this issue to avoid showing these warnings. And the bot does add some flags [1] to make the build more consistent and align with latest mainline ones. [1] https://github.com/intel/lkp-tests/blob/master/kbuild/etc/kbuild-kcflags