make: unifdef for other OSes (undefined)

*** 59,71 ****
  #       include <rx/api.h>
  #endif
  
  #include <signal.h>
  
- #ifndef HP_UX
  #       include <stropts.h>
- #endif
  
  #include <sys/errno.h>
  #include <sys/stat.h>
  #include <sys/types.h>
  #include <sys/utsname.h>        /* uname() */
--- 59,69 ----
*** 3557,3571 ****
          switch (child) {
          case -1:
                  break;
          case 0:
                  enable_interrupt((void (*) (int))SIG_DFL);
- #ifdef linux
-                 (void) signal(SIGUSR1, Avo_PollResultsAction_Sigusr1Handler);
- #else
                  (void) sigset(SIGUSR1, Avo_PollResultsAction_Sigusr1Handler);
- #endif
                  pollResultsAction(outFn, errFn);
  
                  exit(0);
                  break;
          default:
--- 3555,3565 ----
*** 3615,3640 ****
                          outFn, strerror(errno));
                  exit(1);
          }
  
          while (!pollResultsActionTimeToFinish && stat(outFn, &statbuf) == 0) {
- #ifdef linux
-                 if ((statbuf.st_mtime > file_time)
-                    ) {
-                         file_time = statbuf.st_mtime;
-                         rxmGetNextResultsBlock(fd);
-                 }
- #else
                  if ((statbuf.st_mtim.tv_sec > file_time) ||
                      ((statbuf.st_mtim.tv_sec == file_time) &&
                      (statbuf.st_mtim.tv_nsec > file_time_nsec))
                     ) {
                          file_time = statbuf.st_mtim.tv_sec;
                          file_time_nsec = statbuf.st_mtim.tv_nsec;
                          rxmGetNextResultsBlock(fd);
                  }
- #endif
                  us_sleep(STAT_RETRY_SLEEP_TIME);
          }
          // Check for the rest of output
          rxmGetNextResultsBlock(fd);
  
--- 3609,3626 ----