[PATCH][_GLIBCXX_INLINE_VERSION] Adapt to_chars/from_chars symbols

[François Dumont]

On 28/11/22 19:35, Jonathan Wakely wrote:
>
>
> On Mon, 28 Nov 2022 at 06:07, François Dumont via Libstdc++ 
> <libstdc++@gcc.gnu.org <mailto:libstdc%2B%2B@gcc.gnu.org>> wrote:
>
>     This patch is fixing those tests:
>
>     20_util/to_chars/float128_c++23.cc
>     std/format/formatter/requirements.cc
>     std/format/functions/format.cc
>     std/format/functions/format_to_n.cc
>     std/format/functions/size.cc
>     std/format/functions/vformat_to.cc
>     std/format/string.cc
>
>     Note that symbols used in <format> for __ibm128 and __iee128 are
>     untested.
>
>
> We don't need to do this for those symbols, the ALT128 config is 
> incompatible with versioned namespace. If you're using the versioned 
> namespace, you don't need backwards compatibility with the old long 
> double ABI.
>
>
>
Here is the simplified patch then.

     libstdc++: [_GLIBCXX_INLINE_VERSION] Add to_chars/from_chars 
symbols export

     libstdc++-v3/ChangeLog

             * include/std/format [_GLIBCXX_INLINE_VERSION](to_chars): 
Adapt __asm symbol
             specifications.
             * config/abi/pre/gnu-versioned-namespace.ver: Add 
to_chars/from_chars symbols
             export.

Ok to commit ?

François
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