QA·C Help - 4600

	4600	The macro '%1s' is also defined in '<%2s>'.

Identifiers		REFERENCE - ISO:C90-7.1.2.1 Reserved Identifiers, ISO:C99-7.1.3 Reserved Identifiers

This is a reserved identifier. A macro of this name is defined in the specified library header file.

This is dangerous if the definitions are not consistent. Even if they are, it may still be wiser to #define the macro using the relevant library header file.

For example:


/*PRQA S 553,2017 ++*/

#define NULL (void *)0         /* Message 4600 - "NULL" is a macro which is defined in <stddef.h> */

MISRA-C:2004 Rules applicable to message 4600:

Rule 20.1 (Required)

Reserved identifiers, macros and functions in the standard library, shall not be defined, redefined or undefined.

See also:

4601 The macro '%1s' is the name of an identifier in '<%2s>'.
4602 The identifier '%1s' is declared as a macro in '<%2s>'.
4603 The object/function '%1s'is being defined with the same name as an ordinary identifier defined in '<%2s>'.
4604 The object/function '%1s' is being declared with the same name as an ordinary identifier defined in '<%2s>'.
4605 The typedef '%1s' is also defined in '<%2s>'.
4606 The typedef '%1s' has the same name as another ordinary identifier in '<%2s>'.
4607 The enum constant '%1s' has the same name as another ordinary identifier in '<%2s>'.
4608 The tag '%1s' is also defined in '<%2s>'.

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