external/libnumbertext: Silence -Werror,-Wdeprecated-declarations

...when building against LLVM 18 trunk libc++,

> In file included from Numbertext.cxx:6:
> ~/llvm/inst/bin/../include/c++/v1/locale:3772:1: error: 'wstring_convert<std::codecvt_utf8<wchar_t>>' is deprecated [-Werror,-Wdeprecated-declarations]
>  3772 | wstring_convert<_Codecvt, _Elem, _WideAlloc, _ByteAlloc>::
>       | ^
> ~/llvm/inst/bin/../include/c++/v1/locale:3649:17: note: in instantiation of member function 'std::wstring_convert<std::codecvt_utf8<wchar_t>>::to_bytes' requested here
>  3649 |         {return to_bytes(__wstr.data(), __wstr.data() + __wstr.size());}
>       |                 ^
> Numbertext.cxx:164:22: note: in instantiation of member function 'std::wstring_convert<std::codecvt_utf8<wchar_t>>::to_bytes' requested here
>   164 |     return converter.to_bytes( s );
>       |                      ^
> ~/llvm/inst/bin/../include/c++/v1/locale:3591:28: note: 'wstring_convert<std::codecvt_utf8<wchar_t>>' has been explicitly marked deprecated here
>  3591 | class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 wstring_convert
>       |                            ^
> ~/llvm/inst/bin/../include/c++/v1/__config:942:41: note: expanded from macro '_LIBCPP_DEPRECATED_IN_CXX17'
>   942 | #    define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED
>       |                                         ^
> ~/llvm/inst/bin/../include/c++/v1/__config:915:49: note: expanded from macro '_LIBCPP_DEPRECATED'
>   915 | #      define _LIBCPP_DEPRECATED __attribute__((__deprecated__))
>       |                                                 ^

(The warning is apparently only emitted late during compilation when
instantiating template code, so extending the existing `#pragma GCC diagnostic
push/pop` area did not work, and the `#pragma GCC diagnostic ignored` rather had
to be enabled all through to the end of the TU.)

Change-Id: Iffc1c468426407e3252724d18f358b9923f7f733
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/160437
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <stephan.bergmann@allotropia.de>

0 files changed, 0 insertions, 0 deletions