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