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How to get warnings for undeclared functions [message #1030658]

Sun, 31 March 2013 14:34

Sam Edjanko

Messages: 3
Registered: June 2011

Junior Member

Hi All

I don't get it managed that eclipse detects and marks functions that have not been declared before. This only works with undeclared variables, but not functions. For instance:

int main(void) {
undeclaredFunction("test"); // not market, although never declared
undeclaredVariable = 13; // marked as "symbol unresolved"
return 1;
}

I ticked the field "Function cannot be resolved" in Eclipse / Settings / C C++ / Code Analysis

Does anybody have a hint into the right direction?

Thanks
Sam

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Re: How to get warnings for undeclared functions [message #1032271 is a reply to message #1030658]

Tue, 02 April 2013 19:53

Sam Edjanko

Messages: 3
Registered: June 2011

Junior Member

Interestingly, this works with C++ projects but not with C projects. I'm completely lost.

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Re: How to get warnings for undeclared functions [message #1032694 is a reply to message #1032271]

Wed, 03 April 2013 10:02

Klaus km

Messages: 142
Registered: November 2011

Senior Member

Hello Sam,

Quote:

Interestingly, this works with C++ projects but not with C projects. I'm completely lost.

sadly the Code Analysis function (CODAN) is not yet documented, but I guess that it distinguishes between C and C++, because they languages are different.
See: http://en.wikipedia.org/wiki/Compatibility_of_C_and_C%2B%2B

In C implicit function declaration are possible (but bad style) but in C++ this is not allowed.

I think that CODAN should report an Error for C++ (what it does) and a Warning for C (it does not).

Please check Bugzilla, maybe there is already a related bug entry. If not, you could add one...

regards,
Klaus

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