Re: [arm-gnu] _FPU_EXTENDED and _FPU_DOUBLE

[Paul Brook <paul@xxxxxxxxxxxxxxxx>]

> There should be _FPU_EXTENDED and _FPU_DOUBLE defined under toolchain's
> include directory called fpu_control.h.

fpu_control.h provides low level machine specific definitions for low-level 
tweaking of the FPU state (mostly intended for internal use by the C 
library). You're expected to know what you're doing before you use it.

The macros you mention are specific to the x87 FPU, and make no sense for ARM 
targets. 

Paul