6 * alignof - ALIGNOF() macro to determine alignment of a type.
8 * Many platforms have requirements that certain types must be aligned
9 * to certain address boundaries, such as ints needing to be on 4-byte
10 * boundaries. Attempting to access variables with incorrect
11 * alignment may cause performance loss or even program failure (eg. a
14 * There are times which it's useful to be able to programatically
15 * access these requirements, such as for dynamic allocators.
19 * #include "alignof/alignoff.h"
21 * int main(int argc, char *argv[])
23 * char arr[sizeof(int)];
25 * if ((unsigned long)arr % ALIGNOF(int)) {
26 * printf("arr %p CANNOT hold an int\n", arr);
29 * printf("arr %p CAN hold an int\n", arr);
34 int main(int argc, char *argv[])
39 if (strcmp(argv[1], "depends") == 0) {
40 printf("build_assert\n");