Synopsis

(Required) Identifiers that define objects or functions with external linkage shall be unique.

Enabled by default

Yes

Severity/Certainty

Low/Medium

Full description

One or more external identifier names were found that are not unique.

This is a link analysis check.

Coding standards

Code examples

The following code example fails the check and will give a warning:

/* file1.c */
#include <stdint.h>
/* Non-compliant if "foo" declared elsewhere with external linkage */
static void foo ( void ) 
{
  int16_t index; /* "index" has no linkage */
}

The following code example passes the check and will not give a warning about this issue:

#include <stdint.h>
/* "unique_foo" not defined elsewhere */
static void unique_foo ( void ) 
{
  int16_t index; /* "index" has no linkage */
}