no FPU in memset

How can I tell the linker/compiler not to use memset/memcpy function which use FPU registers?

For example: SCIOPTA allows to limit the use of the FPU for certain tasks (to improve task-switching). Tasks without FPU may not use FPU registers. But the compiler/linker uses optimized versions of memset() which results in an exception.

I tried to compile C files with --fpu none, but this produces link-timer errors.

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