ref: 410cbd3227ac3b05a11f820d23bd30c39dde6af5
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++) /* nothing */; return ret; }