ref: b9d7c95aa5bf9e06fc7d6a58cd5d0c600f128bf3
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; }