On 17/01/2015 19:03, "Philipp Klaus Krause" <[email protected]> wrote:
>Currently, when compiling using --std-sdcc89 or --std-sdcc99 (but not
>when using --std-c89, --std-c99 or --std-c11), sdcc does not do integer
>promotion on explicitly cast arguments to functions with variable
>arguments:
>
>void f1(int, ...);
>
>char c;
>
>void f2(void)
>{
> f1(0, (char)c); // Will pass a char
> f1(0, c); // Will pass an int
>}
>
>This can save a byte on the stack when passing an argument of char to a
>functionw with variable arguments. However, it makes code compiled using
>different --std- options incompatible (will fail at run time). I assume
>char arguments to functions with variable arguments to be relatively
>rare, and the cases where the single byte on the stack matters even more
>so.
>
>In anyone using this feature?
>
>If not, I'd suggest to drop it after the next release.
>
>Philipp
>
>
I'm ok with dropping this.
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