[Bug c/66425] (void) cast doesn't suppress __attribute__((warn_unused_result))

[zsojka at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66425

--- Comment #73 from Zdenek Sojka <zsojka at seznam dot cz> ---
See MISRA C:2012 Rule 17.7:
"...  If the return value of a function is intended not to be used explicitly,
it should be cast to the void type. ..."

It would be helpful if gcc could be used to write MISRA-compliant code, or at
least if it wouldn't generate compilation warnings when the programmer is
targeting MISRA-compliancy.

I understand this might be a very complex topic, due to gcc being free
software, and other companies possibly providing / selling the tool
qualification.