FP: MISRA rule 8.4

[mks004]

I am running into a suspected FP when checking this piece of code with Cppcheck 2.6 MISRA addon:

extern void func1 ( void );

void func1 ( void )
{
  /* Compliant */
}

This is flagged as MISRA rule 8.4 violation:

test.c:1:13: style: A compatible declaration shall be visible when an object or function with external linkage is defined [misra-c2012-8.4]
extern void func1 ( void );
            ^

However this code is an example of compliant code copied directly from MISRA standard section on rule 8.4.

[Daniel Marjamäki]

hmm.. I can reproduce with cppcheck-2.6 but not with latest cppcheck git head.