ref: 4eb0595fdcfb5064a5f81b1ffe4fb2de4c6a3dd3 dir: /lib/c/src/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; }