MISRAC2012-Rule-17.3
In this section:
Synopsis
(Mandatory) A function shall not be declared implicitly
Enabled by default
Yes
Severity/Certainty
Medium/High
Full description
Functions are used without prototyping. This check is identical to FUNC-implicit-decl, MISRAC2004-8.1, CERT-DCL31-C.
Coding standards
- CERT DCL31-C
Declare identifiers before using them
- MISRA C:2004 8.1
(Required) Functions shall have prototype declarations and the prototype shall be visible at both the function definition and call.
- MISRA C:2012 Rule-17.3
(Mandatory) A function shall not be declared implicitly
Code examples
The following code example fails the check and will give a warning:
void func2(void)
{
func();
}
The following code example passes the check and will not give a warning about this issue:
void func(void);
void func2(void)
{
func();
}