[cfe-dev] Unexpected warning in -std=gnu89 -pedantic mode.

[Chris Lattner]

On Aug 26, 2009, at 11:42 AM, Eli Friedman wrote:
>> $ cat aaa.c
>> int foo() {
>>   return ({2+3;});
>> }
>>
>> $ clang-cc -std=gnu89 -pedantic aaa.c
>> aaa.c:2:11: warning: use of GNU statement expression extension
>>   return ({2+3;});
>>           ^
>> 1 diagnostic generated.
>> $
>
> I think it's worth noting that our behavior matches gcc here... what
> exactly were you expecting?

Right, my understanding is that -pedantic emits warnings vs the base  
language (c89 in this case) not vs "gnu89".

-Chris