[Bug middle-end/101836] __builtin_object_size(P->M, 1) where M is an array and the last member of a struct fails

qinzhao at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Tue Jun 14 21:03:17 GMT 2022


--- Comment #29 from qinzhao at gcc dot gnu.org ---
(In reply to Jakub Jelinek from comment #28)
> (In reply to Qing Zhao from comment #27)
> > > Wouldn't this be -fno-strict-flex-arrays, i.e. the current behaviour?
> > 
> > Yes, it’s the same.  =0 is aliased with -fno-strict-flex-arrays.
> That is indeed what we do for many options, -fno-whatever is alias to
> -fwhatever=0 (or -fwhatever=something for options which take enums and not
> numbers).

thank you for the info.
could you point me an example of such option? then I can check to see how to
implement this alias relationship between =0 and -fno-strict-flex-arrays?

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