http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54692
--- Comment #3 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-09-24 14:21:05 UTC --- The following lines from gcc/configure don't know about -Og: 4862 # Remove the -O2: for historical reasons, unless bootstrapping we prefer 4863 # optimizations to be activated explicitly by the toplevel. 4864 case "$CC" in 4865 */prev-gcc/xgcc*) ;; 4866 *) CFLAGS=`echo $CFLAGS | sed "s/-O[s0-9]* *//" ` 4867 CXXFLAGS=`echo $CXXFLAGS | sed "s/-O[s0-9]* *//" ` ;; 4868 esac When I comment them out, gcc builds fine.
