Re: recommending AC_SYS_YEAR2038_REQUIRED ?

[Paul Eggert]

On 2023-04-10 14:42, Bruno Haible wrote:
> How about a middle ground between the two macros? A macro, say
> AC_SYS_YEAR2038_UNLESS_OPT_OUT (*), that
>    - like AC_SYS_YEAR2038, has the option --disable-year2038,
>    - like AC_SYS_YEAR2038_REQUIRED, fails if a large 'time_t' is
>      unavailable and --disable-year2038 was not specified.

Even simpler, let's have just one new macro instead of two. I.e., let's 
change Autoconf to remove AC_SYS_YEAR2038_REQUIRED and to define instead 
a macro AC_SYS_YEAR2038_OPT_OUT that acts like AC_SYS_YEAR2038 except it 
errors out if wide time_t and --disable-year2038 are both missing.

Then let's propagate this change into Gnulib, and rename Gnulib's 
year2030-required module to year2038-opt-out.

Similarly for AC_SYS_LARGEFILE_REQUIRED.

Since this is a change to Autoconf I'd like to hear Zack's opinion.