Re: [PATCH v5 2/2] Y2038: make __tz_convert compatible with 64-bit-time

[Paul Eggert <eggert@cs.ucla.edu>]

On 06/18/2018 12:14 PM, Albert ARIBAUD (3ADEV) wrote:
> +#include <errno.h>

Why does time/ctime.h need this addition? I don't see where the rest of 
the patch is using anything that errno.h defines. Similarly for 
time/ctime_r.c, time/gmtime.c, time/localtime.c. I suspect this is a 
leftover of the older version of this patch that had __set_errno 
(EINVAL), and I suggest not including <errno.h> in these files.

>   /* Figure out the correct timezone for TM and set `__tzname',
> -   `__timezone', and `__daylight' accordingly.  */
> +   `__timezone', and `__daylight' accordingly.
> +   NOTE: this takes a __time64_t value, so passing a time_t value is OK. */
>   void
> -__tz_compute (time_t timer, struct tm *tm, int use_localtime)
> +__tz_compute (__time64_t timer, struct tm *tm, int use_localtime)

Why is that "NOTE:" comment line important or needed? The proposed set 
of patches never pass a time_t value to __tz_compute. I suspect this 
line is a leftover from an older version of the patch, and suggest 
removing that line.

Otherwise, the patch looks OK to me.