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Information in this article applies to:

  • C166 Version 3.12
  • C166 Version 4.03


Help. I receive the following warning when I compile my C code.

*** WARNING 140 IN LINE 14 OF .\TEST.C: 'func' undefined; assuming 'extern int func()'

How can I fix this?


This warning indicates that the func function is undefined. The compiler is going to assume that the function is declared as int func ().

To get rid of this warning, you must create a function prototype for the undefined function. For example:

void func (int a, int b);

void main (void)
func (1, 2);

Last Reviewed: Sunday, March 12, 2000

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