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To support your argument, NetBSD seems to have hacked their version
(used #ifdef _KERNEL) so that float isn't required.

On 15 October 2015 at 13:23, Real Time <> wrote:
> In addition to issues with exotic compilers/libraries, some Real Time
> Operating Systems do not save the floating point registers on context
> switches, which makes it impossible to use floating point with CPU's that
> include hardware floating point operations. In others, one must specifically
> enable it. For example, in VxWorks, floating point registers are not saved
> unless a specific option is set when the thread is created.