On Sat, Oct 21, 2017 at 9:03 AM, Tejun Heo <t...@kernel.org> wrote: > The kernel is explicitly using GNU extended version of C and has > always from the beginning, so not-std-c isn't a valid argument.
Ok, how about that it looks like gcc7.1 starts treating this as an error? https://godbolt.org/g/ivzPHZ gcc6.3 looks like it starts trying to warn about this. I don't have a local build of gcc7.1 to verify, but it seems like setting -std=gnu99 doesn't help. With Clang, it seems to be a warning that can be ignored via command line flags, but doesn't look like that's possible for newer versions of gcc, so this will have to be addressed at some point.
