extern int inside_main; typedef __SIZE_TYPE__ size_t; char * strncat (char *s1, const char *s2, size_t n) { char *dest = s1; char c; #ifdef __OPTIMIZE__ if (inside_main) abort(); #endif while (*s1) s1++; while (n > 0) { c = *s2++; *s1++ = c; if (c == 0) return dest; n--; } if (c != '\0') *s1 = '\0'; return dest; }