gistfile1.txt

clang -g -O2  -DHAVE_CONFIG_H     -c -o wakelan.o wakelan.c
wakelan.c:39:26: warning: cast to 'void *' from smaller integer type 'int' [-Wint-to-void-pointer-cast]
static void *use_rcsid = (void *)((char *)&use_rcsid || (void *)&rcsid);
                         ^
wakelan.c:49:5: warning: implicitly declaring library function 'exit' with type 'void (int) __attribute__((noreturn))' [-Wimplicit-function-declaration]
    exit (0);
    ^
wakelan.c:49:5: note: include the header <stdlib.h> or explicitly provide a declaration for 'exit'
wakelan.c:65:10: warning: implicitly declaring library function 'toupper' with type 'int (int)' [-Wimplicit-function-declaration]
            c = toupper(*str++);
                ^
wakelan.c:65:10: note: include the header <ctype.h> or explicitly provide a declaration for 'toupper'
wakelan.c:104:17: warning: implicit declaration of function 'getopt' is invalid in C99 [-Wimplicit-function-declaration]
    while ((c = getopt(argc, argv, "hvp:m:b:")) != EOF) {
                ^
wakelan.c:106:25: error: use of undeclared identifier 'optarg'
            case 'b': target = optarg;             break;
                               ^
wakelan.c:107:25: error: use of undeclared identifier 'optarg'
            case 'm': mac    = optarg;             break;
                               ^
wakelan.c:108:30: warning: implicit declaration of function 'atoi' is invalid in C99 [-Wimplicit-function-declaration]
            case 'p': bport = htons(atoi(optarg)); break;
                                    ^
wakelan.c:108:35: error: use of undeclared identifier 'optarg'
            case 'p': bport = htons(atoi(optarg)); break;
                                         ^
wakelan.c:108:35: error: use of undeclared identifier 'optarg'
wakelan.c:108:35: error: use of undeclared identifier 'optarg'
wakelan.c:108:35: error: use of undeclared identifier 'optarg'
wakelan.c:124:14: error: use of undeclared identifier 'optind'
    if (argv[optind] != NULL) {
             ^
wakelan.c:125:13: error: use of undeclared identifier 'optind'
        mac = argv[optind++];
                   ^
wakelan.c:127:14: error: use of undeclared identifier 'optind'
    if (argv[optind] != NULL) {
             ^
wakelan.c:128:16: error: use of undeclared identifier 'optind'
        target = argv[optind++];
                      ^
wakelan.c:130:14: error: use of undeclared identifier 'optind'
    if (argv[optind] != NULL) {
             ^
wakelan.c:131:26: error: use of undeclared identifier 'optind'
        bport = htons(atoi(argv[optind++]));
                                ^
wakelan.c:131:26: error: use of undeclared identifier 'optind'
wakelan.c:131:26: error: use of undeclared identifier 'optind'
wakelan.c:131:26: error: use of undeclared identifier 'optind'
wakelan.c:133:14: error: use of undeclared identifier 'optind'
    if (argv[optind] != NULL) {