[PATCH] Remove __SIZE_TYPE__ usage (BZ 33969)

[Joseph Myers]

On Thu, 12 Mar 2026, Adhemerval Zanella Netto wrote:

> > The question is: which installed headers use this fortify support, and do 
> > all such headers define size_t unconditionally (or, failing that, for all 
> > conditions under which the fortify support is used)?  For example, 
> > <string.h> defines size_t, so there is certainly no problem for any use of 
> > these fortify macros from <string.h>.
> > 
> 
> Right, my assumption is since fortify is a GNU extension we could define
> that size_t would be defined (as I did for poll2.h).  But it seems that
> _FORTIFY_SOURCE is not really tied to _GNU_SOURCE, so I think I will need

Indeed, _FORTIFY_SOURCE is orthogonal to the various standards.  To the 
extent that check-installed-headers.sh checks combinations of language, 
library and fortify modes, that may be evidence that the headers in 
question do in fact define size_t, but the affected headers should be 
enumerated to confirm this properly.

-- 
Joseph S. Myers
josmyers@redhat.com