make: unifdef SUN5_0 (defined)

*** 47,59 ****
  #include <stdarg.h>             /* va_list, va_start(), va_end() */
  #include <stdlib.h>             /* mbstowcs() */
  #include <sys/signal.h>         /* SIG_DFL */
  #include <sys/wait.h>           /* wait() */
  
- #ifdef SUN5_0
  #include <string.h>             /* strerror() */
- #endif
  
  #if defined (HP_UX) || defined (linux)
  #include <unistd.h>
  #endif
  
--- 47,57 ----
*** 66,88 ****
   */
  
  /*
   * Static variables
   */
- #ifdef SUN5_0
  extern "C" {
          void            (*sigivalue)(int) = SIG_DFL;
          void            (*sigqvalue)(int) = SIG_DFL;
          void            (*sigtvalue)(int) = SIG_DFL;
          void            (*sighvalue)(int) = SIG_DFL;
  }
- #else
- static  void            (*sigivalue)(int) = (void (*) (int)) SIG_DFL;
- static  void            (*sigqvalue)(int) = (void (*) (int)) SIG_DFL;
- static  void            (*sigtvalue)(int) = (void (*) (int)) SIG_DFL;
- static  void            (*sighvalue)(int) = (void (*) (int)) SIG_DFL;
- #endif
  
  long    getname_bytes_count = 0;
  long    getname_names_count = 0;
  long    getname_struct_count = 0;
  
--- 64,79 ----
*** 120,132 ****
          if (result == NULL) {
                  char buf[FATAL_ERROR_MSG_SIZE];
                  sprintf(buf, NOCATGETS("*** Error: malloc(%d) failed: %s\n"), size, strerror(errno));
                  strcat(buf, catgets(libmksdmsi18n_catd, 1, 126, "mksh: Fatal error: Out of memory\n"));
                  fputs(buf, stderr);
- #ifdef SUN5_0
                  exit_status = 1;
- #endif
                  exit(1);
          }
          return result;
  }
  
--- 111,121 ----
*** 282,317 ****
   *              sighvalue       The original signal handler
   */
  void
  enable_interrupt(register void (*handler) (int))
  {
- #ifdef SUN5_0
          if (sigivalue != SIG_IGN) {
- #else
-         if (sigivalue != (void (*) (int)) SIG_IGN) {
- #endif
                  (void) bsd_signal(SIGINT, (SIG_PF) handler);
          }
- #ifdef SUN5_0
          if (sigqvalue != SIG_IGN) {
- #else
-         if (sigqvalue != (void (*) (int)) SIG_IGN) {
- #endif
                  (void) bsd_signal(SIGQUIT, (SIG_PF) handler);
          }
- #ifdef SUN5_0
          if (sigtvalue != SIG_IGN) {
- #else
-         if (sigtvalue != (void (*) (int)) SIG_IGN) {
- #endif
                  (void) bsd_signal(SIGTERM, (SIG_PF) handler);
          }
- #ifdef SUN5_0
          if (sighvalue != SIG_IGN) {
- #else
-         if (sighvalue != (void (*) (int)) SIG_IGN) {
- #endif
                  (void) bsd_signal(SIGHUP, (SIG_PF) handler);
          }
  }
  
  /*
--- 271,290 ----
*** 392,404 ****
                  return errbuf;
          } else {
  #ifdef SUN4_x
                  return(sys_errlist[errnum]);
  #endif
- #ifdef SUN5_0
                  return strerror(errnum);
- #endif
  
          }
  #endif // linux
  }
  
--- 365,375 ----
*** 453,465 ****
          (void) fputs(buf, stderr);
          (void) fflush(stderr);
          if (buf != static_buf) {
                  retmem_mb(buf);
          }
- #ifdef SUN5_0
          exit_status = 1;
- #endif
          exit(1);
  }
  
  /*
   *      fatal_reader_mksh(format, args...)
--- 424,434 ----
*** 517,529 ****
                  (void) fprintf(stderr,
                                 catgets(libmksdmsi18n_catd, 1, 133, "Current working directory %s\n"),
                                 get_current_path_mksh());
          }
          (void) fflush(stderr);
- #ifdef SUN5_0
          exit_status = 1;
- #endif
          exit(1);
  }
  
  /*
   *      warning_mksh(format, args...)
--- 486,496 ----
*** 571,585 ****
  {
          char                    pwd[(MAXPATHLEN * MB_LEN_MAX)];
          static char             *current_path;
  
          if (current_path == NULL) {
- #if defined(SUN5_0) || defined(HP_UX) || defined(linux)
                  getcwd(pwd, sizeof(pwd));
- #else
-                 (void) getwd(pwd);
- #endif
                  if (pwd[0] == (int) nul_char) {
                          pwd[0] = (int) slash_char;
                          pwd[1] = (int) nul_char;
                  }
                  current_path = strdup(pwd);
--- 538,548 ----
*** 864,881 ****
          /* Make sure the processes running under us terminate first. */
          if (childPid > 0) {
                  kill(childPid, SIGTERM);
                  childPid = -1;
          }
- #if defined(SUN5_0) || defined(HP_UX) || defined(linux)
          while (wait((int *) NULL) != -1);
- #if defined(SUN5_0)
          exit_status = 2;
- #endif
- #else
-         while (wait((union wait *) NULL) != -1);
- #endif
          exit(2);
  }
  
  /*
   *      setup_interrupt()
--- 827,838 ----
*** 891,911 ****
   *              sighvalue       The original signal handler
   */
  void
  setup_interrupt(register void (*handler) (int))
  {
- #ifdef SUN5_0
          sigivalue = bsd_signal(SIGINT, SIG_IGN);
          sigqvalue = bsd_signal(SIGQUIT, SIG_IGN);
          sigtvalue = bsd_signal(SIGTERM, SIG_IGN);
          sighvalue = bsd_signal(SIGHUP, SIG_IGN);
- #else
-         sigivalue = (void (*) (int)) bsd_signal(SIGINT, SIG_IGN);
-         sigqvalue = (void (*) (int)) bsd_signal(SIGQUIT, SIG_IGN);
-         sigtvalue = (void (*) (int)) bsd_signal(SIGTERM, SIG_IGN);
-         sighvalue = (void (*) (int)) bsd_signal(SIGHUP, SIG_IGN);
- #endif
          enable_interrupt(handler);
  }
  
  
  void
--- 848,861 ----