+- MISRA Discussion Forums (https://forum.misra.org.uk)
+-- Forum: MISRA C (https://forum.misra.org.uk/forumdisplay.php?fid=4)
+--- Forum: MISRA C:2012 and MISRA C:2023 guidelines (https://forum.misra.org.uk/forumdisplay.php?fid=21)
+---- Forum: 8.21 Standard libraries (https://forum.misra.org.uk/forumdisplay.php?fid=176)
+---- Thread: Definition of "declare" for Rule 21.2 (/showthread.php?tid=1051)
Definition of "declare" for Rule 21.2 - satoshi - 17-04-2014
Rule's title say "shall not be declared."
C90/C99 use the "declare" for function declarations and variable declarations.
And, macros are used the "define".
Quote:p.167
#define __BUILTIN_sqrt(x) (x) /* Non-compliant */
"example" is a rule violation for the macro definition.
To error the macro definitions could not be a role of rule 21.1?
-----
Best regards,
Satoshi Kawajiri
Re: Definition of "declare" for Rule 21.2 - misra-c - 20-05-2014
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.