[PATCH] libstdc++: Fix constexpr exceptions for -fno-exceptions

[Jakub Jelinek]

On Fri, Jul 11, 2025 at 01:47:18PM +0100, Jonathan Wakely wrote:
Thanks for doing this.

> @@ -301,8 +301,9 @@ namespace std _GLIBCXX_VISIBILITY(default)
>      _GLIBCXX26_CONSTEXPR exception_ptr
>      make_exception_ptr(_Ex __ex) _GLIBCXX_USE_NOEXCEPT
>      {
> -#if __cplusplus >= 202400L
> +#if __cpp_lib_exception_ptr_cast >= 202506L

Just not sure how is make_exception_ptr related to
__cpp_lib_exception_ptr_cast.
Perhaps __cpp_constexpr_exceptions >= 202411L ?

	Jakub