Hi Arnd, long time no see, On Wed, May 10, 2017 at 09:58:13AM +0200, Arnd Bergmann wrote: > >> So in addition to GCC 7.1 I'd like to have at least GCC 6.3 around, > >> which builds kernels without warnings today. > > > > If you don't want warnings, turn off the warnings or just don't look at > > them... or fix the problems? Many of the new warnings point out actual > > problems. > > > > Many of those sprintf problems in the kernel have already been fixed. > > I've been using gcc-7.0 for a long time and fixed a lot of bugs it found, > along with more harmless warnings, but I had disabled a couple of > warning options when I first installed gcc-7 and ended up ignoring > those. > > The exact set of additional options I used is: > > -Wimplicit-fallthrough=0 -Wno-duplicate-decl-specifier > -Wno-int-in-bool-context -Wno-bool-operation -Wno-format-truncation > -Wno-format-overflow > > there were a couple of others that I sent kernel fixes for instead. > I should probably revisit that list and for each of them either > only enable it with "make W=1" or fix all known warnings. > In the long run, I'd actually hope to fix all W=1 warnings too > and enable them by default.
Most of those usually point out actual problems (at least code that isn't as clear as it should be). I do hate that first one though. Segher
