On Mon, 16 Aug 2021 15:31:33 -1000 Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> wrote: > On Mon, Aug 16, 2021 at 3:01 PM Randy Dunlap <rdunlap@xxxxxxxxxxxxx> wrote: > > > > That sounds likely. We can just ignore this if you had rather go that way. > > I'm happy doing it, I don't think the Wmain warnings buy anything for > the kernel. My main worry is just that some compiler version might not > support it at all or similar, and it would cause problems that way. > > Which is really the only reason why I'd like to narrow it down as much > as (trivially) possible. > > It doesn't sound worth trying to pinpoint exact gcc version, but > making it gcc-only would at least narrow it down a _bit_. Looks to me that -Wmain and -Wno-main have been in gcc for a long time. If we limit it to just gcc, I believe it will not be an issue for any compiler version the kernel supports. https://gcc.gnu.org/onlinedocs/gcc/Option-Index.html And perhaps you are correct, as this is not a new option (it's in all the gcc versions I have (tested back to 4.2.4)), and it didn't trigger for me, I too believe this was a bug in a particular version that Randy used. -- Steve
