On 06/26/2016 11:00 AM, martin rudalics wrote:
> Something else must be at work here.  Note that I do not get the errors
> with CFLAGS='-O0 -g2 -gdwarf-2' (from my debug-build options). 

It's odd that you do not get the errors in that case. Perhaps you are 
invoking a different version of GCC when you compile with -O3? If so, 
it's possible you'll have problems elsewhere too; in general if you 
configure with GCC version X, then you may run into problems if you then 
build Emacs with some other GCC version.

> gcc (GCC) 4.6.2 

Thanks, that helped identify a typo that is most likely causing your 
problem. I installed the attached patch to fix it.