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Predefined preprocessor macros for `m68k`

GCC defines the following preprocessor macros for the Motorola m68k configurations.

Any Motorola

m68k

architecture:

__mc68000__

Any Motorola

m68010

architecture:

__mc68010__

Any Motorola

m68020

architecture:

__mc68020__

Any Motorola

m68030

architecture:

__mc68030__

Any Motorola

m68040

architecture:

__mc68040__

Any Motorola

m68060

architecture:

__mc68060__

Any Motorola

m68332

architecture:

__mc68332__

Any Motorola

m68881

architecture:

__HAVE_68881__

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