[Bug libstdc++/100017] [11/12 regression] error: 'fenv_t' has not been declared in '::' -- cross toolchain fails to build

[iains at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100017

--- Comment #15 from Iain Sandoe <iains at gcc dot gnu.org> ---
@dave 

Perhaps you could post the patch at C#12 for review (it would be useful to get
this cleared)