CERT-DCL40-C
In this section:
Synopsis
Do not create incompatible declarations of the same function or object.
Enabled by default
Yes
Severity/Certainty
Low/Low
Full description
Two or more incompatible declarations of the same function or object must not appear in the same program because they result in undefined behavior. This check is identical to MISRAC2012-Rule-8.3.
This is a link analysis check.
Coding standards
- CERT DCL40-C
Incompatible declarations of the same function or object
- MISRA C:2012 Rule-8.3
(Required) All declarations of an object or function shall use the same names and type qualifiers
Code examples
The following code example fails the check and will give a warning:
extern int i;
The following code example passes the check and will not give a warning about this issue:
extern short i;