make: unifdef for other OSes (undefined)

*** 55,74 ****
  #include <sys/stat.h>           /* open() */
  #include <sys/wait.h>           /* wait() */
  #include <ulimit.h>             /* ulimit() */
  #include <unistd.h>             /* close(), dup2() */
  
- #if defined (HP_UX) || defined (linux)
- #       include <sys/param.h>
- #       include <wctype.h>
- #       include <wchar.h>
- #endif
  
- #if defined (linux)
- #       define wslen(x) wcslen(x)
- #       define wscpy(x,y) wcscpy(x,y)
- #endif
  
  /*
   * Defined macros
   */
  #if defined(DISTRIBUTED) || defined(MAKETOOL) /* tolik */
--- 55,65 ----
*** 99,121 ****
   * The second attempt seems to work.
   */
  int
  my_open(const char *path, int oflag, mode_t mode) {
          int res = open(path, oflag, mode);
- #ifdef linux
- // Workaround for NFS problem: even when all directories in 'path'
- // exist, 'open' (file creation) fails with ENOENT.
-         int nattempt = 0;
-         while (res < 0 && (errno == ESTALE || errno == EAGAIN || errno == ENOENT)) {
-                 nattempt++;
-                 if(nattempt > 30) {
-                         break;
-                 }
-                 sleep(1);
- #else
          if (res < 0 && (errno == ESTALE || errno == EAGAIN)) {
- #endif
                  /* Stale NFS file handle. Try again */
                  res = open(path, oflag, mode);
          }
          return res;
  }
--- 90,100 ----
*** 130,150 ****
  redirect_io(char *stdout_file, char *stderr_file)
  {        
          long            descriptor_limit;
          int             i;
  
- #if defined (HP_UX) || defined (linux)
-         /*
-          *  HP-UX does not support the UL_GDESLIM command for ulimit().
-          *  NOFILE == max num open files per process (from <sys/param.h>)
-          */
-         descriptor_limit = NOFILE;
- #else
          if ((descriptor_limit = ulimit(UL_GDESLIM)) < 0) {
                  fatal_mksh(catgets(libmksdmsi18n_catd, 1, 89, "ulimit() failed: %s"), errmsg(errno));
          }
- #endif
          for (i = 3; i < descriptor_limit; i++) {
                  (void) close(i);
          }
          if ((i = my_open(stdout_file,
                   O_WRONLY | O_CREAT | O_TRUNC | O_DSYNC,
--- 109,121 ----
*** 342,378 ****
                  argv[argv_index++] = (char *)NOCATGETS("nice");
                  (void) sprintf(nice_prio_buf, NOCATGETS("-%d"), nice_prio);
                  argv[argv_index++] = strdup(nice_prio_buf);
          }
          argv[argv_index++] = shellname;
- #if defined(linux)
-         if(0 == strcmp(shell->string_mb, (char*)NOCATGETS("/bin/sh"))) {
-                 argv[argv_index++] = (char*)(ignore_error ? NOCATGETS("-c") : NOCATGETS("-ce"));
-         } else {
-                 argv[argv_index++] = (char*)NOCATGETS("-c");
-         }
- #else
          argv[argv_index++] = (char*)(ignore_error ? NOCATGETS("-c") : NOCATGETS("-ce"));
- #endif
          if ((length = wslen(command)) >= MAXPATHLEN) {
                  tmp_mbs_buffer = getmem((length * MB_LEN_MAX) + 1);
                  (void) wcstombs(tmp_mbs_buffer, command, (length * MB_LEN_MAX) + 1);
                  cmd_argv_index = argv_index;
                  argv[argv_index++] = strdup(tmp_mbs_buffer);
                  retmem_mb(tmp_mbs_buffer);
          } else {
                  WCSTOMBS(mbs_buffer, command);
                  cmd_argv_index = argv_index;
- #if defined(linux)
-                 int mbl = strlen(mbs_buffer);
-                 if(mbl > 2) {
-                         if(mbs_buffer[mbl-1] == '\n' && mbs_buffer[mbl-2] == '\\') {
-                                 mbs_buffer[mbl] = '\n';
-                                 mbs_buffer[mbl+1] = 0;
-                         }
-                 }
- #endif
                  argv[argv_index++] = strdup(mbs_buffer);
          }
          argv[argv_index] = NULL;
          (void) fflush(stdout);
          if ((childPid = fork()) == 0) {
--- 313,332 ----