Georg-Johann Lay <avr@xxxxxxxx> writes: > Ian Lance Taylor schrieb: >> Georg-Johann Lay <avr@xxxxxxxx> writes: >> >>> Hi, when building gcc I get bunch of build warnings like these: >> >> This is normal when building stage 1. You should not see any warnings >> when building stages 2 or 3. >> >> The warnings occur mainly on gcc diagnostic functions. The definitions >> of the control sequences used in these functions change from time to >> time. This then triggers warnings when building stage 1 with an older >> version of gcc. These warnings are unimportant. >> >> Ian > > The background is bug reports like > > http://gcc.gnu.org/PR48896#c2 > > where for some people the build fails because of warnings that I don't > even see with reasonable version of build GCC. Looks like Joern was building a cross-compiler with -Werror. In general, doing that means that you have to build the cross-compiler with the same version of the compiler, configured and built as a native compiler. Most people just don't use -Werror for a cross-compiler. Joern is an experienced gcc developer, so I would guess that he was in fact using the same version of the compiler, and was reporting errors that occurred nevertheless. In comment #2 you are using a different version of the compiler. I hope that makes sense. Ian
