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13.2 m4¤ò½ªÎ»¤µ¤»¤ë

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m4exit(opt code)

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define(`fatal_error', `errprint(`m4: '__file__: __line__`: fatal error: $*
')m4exit(1)')
⇒
fatal_error(`This is a BAD one, buster')
error→m4: 57.m4exit: 5: fatal error: This is a BAD one, buster

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