[Forwarded from bug-diffut...@gnu.org]
Paul Eggert wrote:
> > +AC_DEFINE([SUPPORT_NON_GREG_CALENDARS_IN_STRFTIME], [false],
> > + [Do not worry about GNU strftime behavior for non-Gregorian calendars.])
>
> > Either SUPPORT_NON_GREG_CALENDARS_IN_STRFTIME needs to be defined to 0,
> > not false. Or the syntax check sc_Wundef_boolean needs to be tweaked.
> Thanks for mentioning that. lib/strftime.c's comment suggests 'false',
> which is why I defined it to 'false'.
>
> These days it should be OK to use 'true' and 'false' due to C23 and the
> near-ubiquitous use of the 'bool' module, so I installed the attached.
2025-09-07 Paul Eggert <egg...@cs.ucla.edu>
maint: allow false/true in C macros
* top/maint.mk (sc_Wundef_boolean): Allow false and true in C
macro definiens. C23 requires support for false and true, and the
‘bool’ module makes it easy to support this in older compilers.
