https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123202
--- Comment #2 from Iain Buclaw <ibuclaw at gcc dot gnu.org> ---
Confirmed on x86 with `-mno-80387`
$ gdc std_math_hardware.d -funittest -mno-80387
std_math_hardware.d:7:26: error: undefined identifier ‘FloatingPointControl’
7 | FloatingPointControl fpctrl;
| ^
