ref: e7d32ccc043605258973593c6da0dc60739eeaa5
dir: /src/libc/string/strcat.c/
#include <string.h>
#undef strcat
char *
strcat(char * restrict dst, const char * restrict src)
{
char *ret = dst;
while (*dst)
++dst;
while (*dst++ = *src++)
;
return ret;
}