Re: [RFC][PATCH] A generic boolean (version 3)
Date: Sun Jul 23 2006 - 11:48:52 EST
Citerar Lars Gullik Bjønnes <larsbj@xxxxxxxxxx>:
> ricknu-0@xxxxxxxxxxxxxx writes:
> | --- a/include/asm-i386/types.h
> | +++ b/include/asm-i386/types.h
> | @@ -1,6 +1,13 @@
> | #ifndef _I386_TYPES_H
> | #define _I386_TYPES_H
> | +#if __GNUC__ >= 3
> | +typedef _Bool bool;
> | +#else
> | +#warning You compiler doesn't seem to support boolean types, will set
> 'bool' as
> | an 'unsigned int'
> | +typedef unsigned int bool;
> | +#endif
> | +
> What does C99 say about sizeof(_Bool)?
> At least with gcc 4 it is 1. Can that pose a problem? gcc < 3 giving a
> different size for bool?
Well, it might. I don't see it other then when someone uses a variable of
another type and the "boolean" variable (now an int) is of a larger value then
that variable. But then that is a bug and should be fixed.
But rest easy, bool will only be _Bool from now on. :)
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