rename.c:78:4: error: #error No getopt functions
   #error No getopt functions
    ^
rename.c: In function ‘main’:
rename.c:118:19: error: array type has incomplete element type
     struct option lopt[] = {
                   ^
rename.c:132:15: error: ‘strstr’ undeclared (first use in this function)
     StrStr  = strstr;
               ^
rename.c:132:15: note: each undeclared identifier is reported only once for each function it appears in
rename.c:133:15: error: ‘strncmp’ undeclared (first use in this function)
     StrnCmp = strncmp;
               ^
rename.c:135:5: warning: implicit declaration of function ‘getopt_long’ [-Wimplicit-function-declaration]
     while ((c = getopt_long(argc, argv, sopt, lopt, NULL)) != EOF)  {
     ^
rename.c:159:21: error: ‘optarg’ undeclared (first use in this function)
      if (setpattern(optarg))
                     ^
rename.c:164:6: warning: implicit declaration of function ‘geteuid’ [-Wimplicit-function-declaration]
      if (geteuid() != 0)  {
      ^
rename.c:197:7: error: ‘optind’ undeclared (first use in this function)
  if ((optind + 2) > argc)  {
       ^
rename.c:203:2: warning: implicit declaration of function ‘strcmp’ [-Wimplicit-function-declaration]
  } else if (strcmp(argv[optind], argv[optind+1]))
  ^
rename.c:214:5: warning: implicit declaration of function ‘getcwd’ [-Wimplicit-function-declaration]
     if (getcwd(cwd, SVRBUF) == NULL)  {
     ^
rename.c:214:29: warning: comparison between pointer and integer [enabled by default]
     if (getcwd(cwd, SVRBUF) == NULL)  {
                             ^
rename.c:233:3: warning: implicit declaration of function ‘chdir’ [-Wimplicit-function-declaration]
   chdir(cwd);
   ^
rename.c:118:19: warning: unused variable ‘lopt’ [-Wunused-variable]
     struct option lopt[] = {
                   ^
rename.c: In function ‘change_name’:
rename.c:292:5: warning: implicit declaration of function ‘strncpy’ [-Wimplicit-function-declaration]
     strncpy(new, oldname, SVRBUF);
     ^
rename.c:292:5: warning: incompatible implicit declaration of built-in function ‘strncpy’ [enabled by default]
rename.c:323:2: warning: implicit declaration of function ‘strlen’ [-Wimplicit-function-declaration]
  n -= strlen(p) - pnlen;
  ^
rename.c:323:7: warning: incompatible implicit declaration of built-in function ‘strlen’ [enabled by default]
  n -= strlen(p) - pnlen;
       ^
rename.c:347:2: warning: implicit declaration of function ‘chown’ [-Wimplicit-function-declaration]
  if (chown(new, pwd->pw_uid, pwd->pw_gid) < 0)
  ^
rename.c: In function ‘match_regexpr’:
rename.c:373:2: warning: incompatible implicit declaration of built-in function ‘strncpy’ [enabled by default]
  strncpy(tmp, str + pmatch->rm_eo, SVRBUF);
  ^
rename.c:377:7: warning: incompatible implicit declaration of built-in function ‘strlen’ [enabled by default]
  n -= strlen(str);
       ^
rename.c:379:2: warning: implicit declaration of function ‘strncat’ [-Wimplicit-function-declaration]
  strncat(str, tmp, n);
  ^
rename.c:379:2: warning: incompatible implicit declaration of built-in function ‘strncat’ [enabled by default]
rename.c: In function ‘match_pattern’:
rename.c:395:2: warning: incompatible implicit declaration of built-in function ‘strncpy’ [enabled by default]
  strncpy(tmp, p + pnlen, SVRBUF);
  ^
rename.c: In function ‘match_backward’:
rename.c:422:10: warning: incompatible implicit declaration of built-in function ‘strlen’ [enabled by default]
     rs = strlen(str) - pnlen;
          ^
rename.c:431:6: warning: incompatible implicit declaration of built-in function ‘strncpy’ [enabled by default]
      strncpy(str, subst, l);
      ^
rename.c:443:6: warning: incompatible implicit declaration of built-in function ‘strncpy’ [enabled by default]
      strncpy(tmp, p + pnlen, SVRBUF);
      ^
rename.c: In function ‘setpattern’:
gcc -Wall -O3  -DHAVE_CONFIG_H -DVERSION=\"1.3\" -D_FORTIFY_SOURCE=2  -c -o misc.o misc.c
rename.c:471:10: warning: incompatible implicit declaration of built-in function ‘strlen’ [enabled by default]
  pnlen = strlen(pattern);
          ^
rename.c:500:16: error: ‘strncasecmp’ undeclared (first use in this function)
      StrnCmp = strncasecmp;
                ^
In file included from /usr/include/stdlib.h:492:0,
                 from rename.c:29:
rename.c: In function ‘do_rename’:
rename.c:543:15: warning: incompatible implicit declaration of built-in function ‘strlen’ [enabled by default]
  new = alloca(strlen(oldp) + strlen(newp) + 5);
               ^
rename.c:544:2: warning: implicit declaration of function ‘strcpy’ [-Wimplicit-function-declaration]
  strcpy(new, newp);
  ^
rename.c:544:2: warning: incompatible implicit declaration of built-in function ‘strcpy’ [enabled by default]
rename.c:551:2: warning: implicit declaration of function ‘strcat’ [-Wimplicit-function-declaration]
  strcat(new, oldp);
  ^
rename.c:551:2: warning: incompatible implicit declaration of built-in function ‘strcat’ [enabled by default]
In file included from /usr/include/stdlib.h:492:0,
                 from rename.c:29:
rename.c:553:15: warning: incompatible implicit declaration of built-in function ‘strlen’ [enabled by default]
  new = alloca(strlen(newp) + 1);
               ^
rename.c:554:2: warning: incompatible implicit declaration of built-in function ‘strcpy’ [enabled by default]
  strcpy(new, newp);
  ^
rename.c:569:6: warning: implicit declaration of function ‘read’ [-Wimplicit-function-declaration]
      read(0, buf, 64);
      ^
make: *** [rename.o] Error 1