ref: 1ec4d62ccec0872d1ecc64f6834e5ea8d36f7a1f dir: /lib/c/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; }