__attribute__ ((regparm(...))) in function declaration and gcc 3.4.0

[Giovanni Bajo]

Nicholas Nethercote wrote:

>> Why this fails to compile with gcc 3.4.0 (i686-pc-linux-gnu,
>> 20030229)?
>>
>> $ cat > test.h
>> int plus (int a, int b)  __attribute__ ((regparm (2)));
>> $ cat > test.c
>> #include "test.h"
>>
>> int plus (int a, int b)
>> {
>> return a + b;
>> }
>> $ gcc -c test.c
>> test.c:4: error: conflicting types for 'plus'
>> test.h:1: error: previous declaration of 'plus' was here
>> test.c:4: error: conflicting types for 'plus'
>> test.h:1: error: previous declaration of 'plus' was here
>
> Try adding the __attribute__((regparm(2))) to the function definition
> as well.  It seems this behaviour is new with 3.4.0.

Yes, but I don't know if this is intended. Maybe someone can clarify this?
Otherwise we should file a bugreport.

Giovanni Bajo