On Thu, Apr 5, 2012 at 11:32 AM, Gabriel Dos Reis <g...@integrable-solutions.net> wrote: > On Thu, Apr 5, 2012 at 3:58 AM, Pedro Alves <pal...@redhat.com> wrote: >> On 04/04/2012 10:44 AM, Gabriel Dos Reis wrote: >> >>> Hi, >>> >>> For GCC-4.8, I would like to turn on -Wall by default. >>> Comments? >> >> >> I'd just like to explicitly mention (the obvious fact that) >> that this has the effect of breaking builds of projects that carefully >> craft their warning set to be able to use -Werror, such as e.g., GDB. >> >> Certainly not insurmountable (just add a -Wno-all), but does >> require actively tweaking the build system. I'm sure there >> are many projects affected similarly. > > Be assured that I fully appreciate that projects do use -Werror. > In fact, I do personally encourage people to use -Werror. > > However, the issue is very specific: we talking about -Wall. > If something there is wrong as a default we should have a look > at it whether it should be there at all, should it be improved, etc.
Btw, it would be more reasonable to enable a subset of warnings that we enable at -Wall by default. Notably those that if they were not false positives, would lead to undefined behavior at runtime. Specifically I don't think we should warn about unused static functions or variables by default. Richard. > -- Gaby
