Hello Ingolf,
the -mfloat-abi=softfp instructs the compiler to emit floating-point
instructions if other machine options specify a FPU. Why would you use
this instead of -mfloat-abi=hard? For a statically linked executable
this makes little sense. You still have to take care of the FPU context
during context switches and interrupt processing.
If you really need such a multilib, then you can patch
gcc/config/arm/t-rtems. I don't know if you can add custom patches to
the RTEMS Source Builder.
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