Definition of "declare" for Rule 21.2

[misra-c]

Rule 21.1 restricts the use of #define and #undef on certain names.
Rule 21.2 restricts the declarations of certain names.

As you found, we have incorrectly put an example in the incorrect rule.

Code:

#define _BUILTIN_sqrt(x) (x)      /* Non-compliant with Rule 21.1, but compliant with Rule 21.2 */

int _BUILTIN_sqrt;                /* Non-compliant with Rule 21.2 */

Thank you for pointing this out to us.