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[Default]

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This option specifies the microcontroller type for the instruction code to be generated.

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When cpu=rx600 is specified, an instruction code for the RX600 Series is generated.

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When cpu=rx200 is specified, an instruction code for the RX200 Series is generated.

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This option is for compatibility with earlier products.

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For upcoming RX-family MCUs, the isa option will be used instead of the cpu option to select an instruction-set architecture. In developing new applications, use the isa option where possible.

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The cpu option can be replaced by the -isa, -fpu and -nofpu option as follows.

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- -cpu=rx600 ==> -isa=rxv1 -fpu

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- -cpu=rx200 ==> -isa=rxv1 -nofpu

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When cpu=rx200 is specified, the nofpu option is automatically selected.

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cpu=rx200 and the fpu option cannot be specified at the same time.

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When cpu=rx600 is specified while neither the nofpu option nor the fpu option has been specified, the fpu option is automatically selected.

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Omitting the cpu option will lead to an error if neither the -isa option nor one of the environment variables (CPU_RX or ISA_RX) is specified.

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The cpu and isa options cannot be specified at the same time.