[committed, v4] libstdc++: Handle encodings in localized chrono formatting [PR109162]

[Dimitar Dimitrov]

On Wed, Jul 31, 2024 at 05:09:52PM +0100, Jonathan Wakely wrote:
> It took a while, but I was finally happy with this v4 patch, so I pushed
> it to trunk. Then I noticed silly mistake in the new test, which I'll
> fix shortly.
> 
...
> +#if defined _GLIBCXX_HAVE_ICONV
> +  ::iconv_t _M_cd = (::iconv_t)-1;
> +  mutable mutex mx;
> +#endif

Hi Jonathan,

This patch caused pru-unknown-elf build to break:
  /mnt/nvme/dinux/local-workspace/gcc/libstdc++-v3/src/c++20/format.cc:86:11: error: ‘mutex’ does not name a type
     86 |   mutable mutex mx;
        |           ^~~~~

Should the section also be guarded by _GLIBCXX_HAS_GTHREADS ?

Regards,
Dimitar