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Interpretation when omitted

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This option changes the interpretation of the double and long double types.

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When 4 is specified as the parameter, both the double type and the long double type are regarded as the float type.

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When 8 is specified as the parameter, neither the double type nor the long double type is regarded as the float type.

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An error will occur if neither 4 nor 8 is specified as the parameter.

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An error will occur if the -cpu=S1 and -dbl_size=8 options are specified at the same time.

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An error will occur if the -cpu=S2 and -dbl_size=8 options are specified at the same time.

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When the -dbl_size=4 option is specified and a standard library function for the double type is called, it is replaced with the corresponding standard library for the float type.

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This option affects the predefined macros.

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To regard both the double type and the long double type as the float type, describe as: