Re: Fix a warning with gcc 15 and glibc 2.43

On Sun, Jan 25, 2026 at 02:36:07AM +0100, Bruno Haible via Bug reports for the GNU Texinfo documentation system wrote:
> Building texinfo-7.2.90 with gcc 15.2.0 and glibc 2.43 (that was released
> yesterday), I see a warning:
> 
> ../../install-info/install-info.c:1605:15: warning: initialization discards ‘const’ qualifier from pointer target type [-Wdiscarded-qualifiers]
> 
> The cause is this change in glibc [1]:
>   * For ISO C23, the functions bsearch, memchr, strchr, strpbrk, strrchr,
>     strstr, wcschr, wcspbrk, wcsrchr, wcsstr and wmemchr that return
>     pointers into their input arrays now have definitions as macros that
>     return a pointer to a const-qualified type when the input argument is
>     a pointer to a const-qualified type.
> 
> Here, ISO C 23 wants 'ptr' to be a 'const char *', not a 'char *'.
> And with it, 'endptr' must be of the same type as well.
> 
> Find attached a proposed patch. I have verified that it fixes the warning.
> 
> [1] https://lists.gnu.org/archive/html/info-gnu/2026-01/msg00005.html

Thank makes sense, thanks for the report.