Avoid incompatible pointer warning when dealing with double-indirection
- by fnawothnig
Assuming this program:
#include <stdio.h>
#include <string.h>
static void ring_pool_alloc(void **p, size_t n) {
static unsigned char pool[256], i = 0;
*p = &pool[i];
i += n;
}
int main(void) {
char *str;
ring_pool_alloc(&str, 7);
strcpy(str, "foobar");
printf("%s\n", str);
return 0;
}
... is it possible to somehow avoid the GCC warning
test.c:12: warning: passing argument 1 of ‘ring_pool_alloc’ from incompatible pointer type
test.c:4: note: expected ‘void **’ but argument is of type ‘char **’
... without casting to (void**) (or simply disabling the compatibility checks)? Because I would very much like to keep compatibility warnings regarding indirection-level...
