Error: "va_start used in function with fixed args"

[saurabhchokshi]

I am using the vfprintf in my application. I am using count for va_list.

char *p;
va_list temp;
va_start(temp, p + sizeof(void *));
vfprintf(fd, format, temp);
va_end(temp);

In this code, I am getting compilation for "va_start used in function with fixed args"

Could you please give me input to get rid of this error??

[Banfa]

va_start is intended to be used on the parameters of a varidac function.

Calling it on local variables is likely to have indeterminate results or undefined behaviour as that is not how va_start was designed to be used. Your stack based variables may be held in a different manor to your function parameters on any given platform.

[saurabhchokshi]

Correct. I haven't use that option previously. But I have noticed that sizeof(va_list) on 64-bit is 24 bytes.

I am using the char * as a argument list i.e. 8 bytes. Is this cause an error in compilation?