[PATCH] string: New thread-safe strtok version

[Florian Weimer]

* Andreas Schwab:

> On Apr 02 2025, Florian Weimer wrote:
>
>> Introduce a new symbol version, so that applications can rely
>> on the new behavior.
>
> What is the advantage of making strtok thread-safe, considering that
> strtok_r exists?

Compatibility with other libcs.

> Will other implementations follow so that POSIX can require it?

Solaris documents strok as thread-safe:

<https://docs.oracle.com/cd/E36784_01/html/E36874/strtok-r-3c.html>

The Windows versions is thread-safe as well:

<https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/strtok-strtok-l-wcstok-wcstok-l-mbstok-mbstok-l?view=msvc-170>

So it wouldn't be a glibc invention.

Thanks,
Florian