[PATCH v2 1/2] timezone: sync to tzdb 2026b

[Adhemerval Zanella Netto]

On 19/05/26 09:39, Florian Weimer wrote:
> * Adhemerval Zanella Netto:
> 
>> On 19/05/26 09:04, Joseph Myers wrote:
>>> On Fri, 15 May 2026, Adhemerval Zanella Netto wrote:
>>>
>>>>> +#ifndef HAVE_MEMPCPY
>>>>> +# if (defined mempcpy \
>>>>> +      || defined __FreeBSD__ || defined __NetBSD__ || defined __linux__)
>>
>> Maye use __GLIBC__ and something for musl instead?
> 
> I think musl still strives to be difficult to identify.
> 
>>>>> +#  define HAVE_MEMPCPY 1
>>>>> +# else
>>>>> +#  define HAVE_MEMPCPY 0
>>>>> +# endif
>>>>> +#endif
>>>>> +#if !HAVE_MEMPCPY
>>>>> +static void *
>>>>> +mempcpy(void *restrict s1, void const *restrict s2, size_t n)
>>>>> +{
>>>>> +  char *p = memcpy(s1, s2, n);
>>>>> +  return p + n;
>>>>> +}
>>>>> +#endif
> 
> We already have this in include/libc-symbols.h:
> 
> /* Define these macros for the benefit of portable GNU code that wants to check
>    them.  Of course, STDC_HEADERS is never false when building libc!  */
> #define STDC_HEADERS    1
> #define HAVE_MBSTATE_T  1
> #define HAVE_MBSRTOWCS  1
> #define HAVE_LIBINTL_H  1
> #define HAVE_WCTYPE_H   1
> #define HAVE_ISWCTYPE   1
> #define ENABLE_NLS      1
> 
> I think it would make sense to expand that.

Sounds reasonable, I will prepare a patch.