I've been looking for a smoking gun, but did not find one. Interestingly this only happens in stage3 on i386-unknown-freebsd10.0 where clang is the bootstrap compiler:
build/genmodes -h > tmp-modes.h build/genmodes: config/i386/i386-modes.def:25: (TF) field format must not be set build/genmodes: config/i386/i386-modes.def:24: (XF) field format must not be set build/genmodes: machmode.def:203: (DF) field format must not be set build/genmodes: machmode.def:202: (SF) field format must not be set build/genmodes: machmode.def:244: (TD) field format must not be set build/genmodes: machmode.def:243: (DD) field format must not be set build/genmodes: machmode.def:242: (SD) field format must not be set gmake[3]: *** [s-modes-h] Error 1 gmake[3]: Leaving directory `/scratch2/tmp/gerald/OBJ-0708-1821/gcc' gmake[2]: *** [all-stage3-gcc] Error 2 gmake[2]: Leaving directory `/scratch2/tmp/gerald/OBJ-0708-1821' gmake[1]: *** [stage3-bubble] Error 2 gmake[1]: Leaving directory `/scratch2/tmp/gerald/OBJ-0708-1821' gmake: *** [bootstrap-lean] Error 2 This was introduced in the last 24 hours. Any ideas? Gerald