__attribute__ ((mode(__byte__)))

Hi,

I would like to map an enum on a byte,so here is my code:


enum my_enum {
A = 1,
B = 2,
} __attribute__ ((mode(__byte__))) ;

int is_A (enum my_enum my_val)
{
return (my_val == A) ;
}

When compiled, I have the following:

cc -c -o toto.o toto.c
toto.c: In function 'is_A':
toto.c:10: warning: comparison is always false due to limited range of
data type

I do not have any problem when i transfrom is_A :
int is_A (unsigned char my_val)
{
return (my_val == A) ;
}

So, muy question is :

Is there a correct way to declare an enum fo map it on a byte.

Thanks

Jérôme

re: __attribute__ ((mode(__byte__)))

JeromeArbezGindre@gmail.com wrote:I don't know quite what you mean by this, or why you feel it's necessary

This, from the rapid websearch I've done, appears to be specific to GCC.
You'd do better posting to a GCC forum like gnu.gcc.help, I suspect.

re: __attribute__ ((mode(__byte__)))

On Oct 9, 3:04 pm, Mark Bluemel <mark_blue...@pobox.comwrote:This enum have to be mapped on a hardware register.
Sorry for the noise.

Thanks.