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CodeSonar® 9.2p0 CONFIDENTIAL CodeSecure Inc
C and C++

LANG.ID.NU.INT : Non-unique Identifiers: Internal Name

Summary

An identifier with internal linkage is identical to one or more other identifiers.

See Identifier Classes for related warning classes.

Properties

Class Name Non-unique Identifiers: Internal Name
Significance style
Mnemonic LANG.ID.NU.INT
Categories
MisraC2025 MisraC2025:5.9 Identifiers that define objects or functions with internal linkage should be unique
MisraC2023 MisraC2023:5.9 Identifiers that define objects or functions with internal linkage should be unique
Misra2012 Misra2012:5.9 Identifiers that define objects or functions with internal linkage should be unique
Misra2004 Misra2004:5.5 No object or function identifier with static storage duration should be reused
AUTOSARC++14 AUTOSARC++14:A2-10-4 The identifier name of a non-member object with static storage duration or static function shall not be reused within a namespace.
MisraC++2008 MisraC++2008:2-10-5 The identifier name of a non-member object or function with static storage duration should not be reused.
CWE CWE:710 Improper Adherence to Coding Standards
CERT-C CERT-C:DCL23-C Guarantee that mutually visible identifiers are unique
Availability Available for C and C++.
Enabling Checks for this warning class are disabled by default. To enable them, add the following WARNING_FILTER rule to the project configuration file. 
WARNING_FILTER += allow class="Non-unique Identifiers: Internal Name"

Example

Suppose fileA.c and fileB.c are both in the analyzed software (but not necessarily in the same compilation unit).

/* LANG.ID.NU.INT.a.c */

#define internA 1
typedef int internB;
void internC(void);

/* LANG.ID.NU.INT.b.c */

static int internA;            /* 'Non-unique Identifiers: Internal Name' warning issued here */
static int internB;            /* 'Non-unique Identifiers: Internal Name' warning issued here */
static int internC;            /* 'Non-unique Identifiers: Internal Name' warning issued here */

Relevant Configuration File Parameters

The following configuration file parameters affect checks for this warning class.

 

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