Remove support for DJGPP < 2.02

This also removes some specially-licensed files and lots of accompanying
explanation.

3 files changed, 5 insertions, 112 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index b5831d811d5..bc044923fe8 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2014-08-09  Reuben Thomas  <rrt@sc3d.org>
+
+        * msdos.c:
+        * dosfns.c (init_dosfns): Remove support for DJGPP < 2.02.
+
 2014-08-09  Jan Djärv  <jan.h.d@swipnet.se>
 
         * widgetprv.h (EmacsFramePart): Remove font.
diff --git a/src/dosfns.c b/src/dosfns.c
index e557dcba022..bdd296bf658 100644
--- a/src/dosfns.c
+++ b/src/dosfns.c
@@ -370,13 +370,6 @@ init_dosfns (void)
      Don't OR it with the previous value, so the value recorded at dump
      time, possibly with `preserve-case' flags set, won't get through.  */
   __opendir_flags = __OPENDIR_FIND_HIDDEN;
-
-#if __DJGPP_MINOR__ == 0
-  /* Under LFN, preserve the case of files as recorded in the directory
-     (in DJGPP 2.01 and later this is automagically done by the library).  */
-  if (!NILP (Fmsdos_long_file_names ()))
-    __opendir_flags |= __OPENDIR_PRESERVE_CASE;
-#endif /* __DJGPP_MINOR__ == 0 */
 }
 
 #ifndef HAVE_X_WINDOWS
diff --git a/src/msdos.c b/src/msdos.c
index ccca371583f..9fe078d0746 100644
--- a/src/msdos.c
+++ b/src/msdos.c
@@ -4016,103 +4016,6 @@ unsetenv (const char *name)
 #endif
 
 
-#if __DJGPP__ == 2 && __DJGPP_MINOR__ < 2
-
-/* Augment DJGPP library POSIX signal functions.  This is needed
-   as of DJGPP v2.01, but might be in the library in later releases. */
-
-#include <libc/bss.h>
-
-/* A counter to know when to re-initialize the static sets.  */
-static int sigprocmask_count = -1;
-
-/* Which signals are currently blocked (initially none).  */
-static sigset_t current_mask;
-
-/* Which signals are pending (initially none).  */
-static sigset_t msdos_pending_signals;
-
-/* Previous handlers to restore when the blocked signals are unblocked.  */
-typedef void (*sighandler_t)(int);
-static sighandler_t prev_handlers[320];
-
-/* A signal handler which just records that a signal occurred
-   (it will be raised later, if and when the signal is unblocked).  */
-static void
-sig_suspender (int signo)
-{
-  sigaddset (&msdos_pending_signals, signo);
-}
-
-int
-sigprocmask (int how, const sigset_t *new_set, sigset_t *old_set)
-{
-  int signo;
-  sigset_t new_mask;
-
-  /* If called for the first time, initialize.  */
-  if (sigprocmask_count != __bss_count)
-    {
-      sigprocmask_count = __bss_count;
-      sigemptyset (&msdos_pending_signals);
-      sigemptyset (&current_mask);
-      for (signo = 0; signo < 320; signo++)
-        prev_handlers[signo] = SIG_ERR;
-    }
-
-  if (old_set)
-    *old_set = current_mask;
-
-  if (new_set == 0)
-    return 0;
-
-  if (how != SIG_BLOCK && how != SIG_UNBLOCK && how != SIG_SETMASK)
-    {
-      errno = EINVAL;
-      return -1;
-    }
-
-  sigemptyset (&new_mask);
-
-  /* DJGPP supports upto 320 signals.  */
-  for (signo = 0; signo < 320; signo++)
-    {
-      if (sigismember (&current_mask, signo))
-        sigaddset (&new_mask, signo);
-      else if (sigismember (new_set, signo) && how != SIG_UNBLOCK)
-        {
-          sigaddset (&new_mask, signo);
-
-          /* SIGKILL is silently ignored, as on other platforms.  */
-          if (signo != SIGKILL && prev_handlers[signo] == SIG_ERR)
-            prev_handlers[signo] = signal (signo, sig_suspender);
-        }
-      if ((   how == SIG_UNBLOCK
-              && sigismember (&new_mask, signo)
-              && sigismember (new_set, signo))
-          || (how == SIG_SETMASK
-              && sigismember (&new_mask, signo)
-              && !sigismember (new_set, signo)))
-        {
-          sigdelset (&new_mask, signo);
-          if (prev_handlers[signo] != SIG_ERR)
-            {
-              signal (signo, prev_handlers[signo]);
-              prev_handlers[signo] = SIG_ERR;
-            }
-          if (sigismember (&msdos_pending_signals, signo))
-            {
-              sigdelset (&msdos_pending_signals, signo);
-              raise (signo);
-            }
-        }
-    }
-  current_mask = new_mask;
-  return 0;
-}
-
-#endif /* not __DJGPP_MINOR__ < 2 */
-
 #ifndef HAVE_SELECT
 #include "sysselect.h"
 
@@ -4259,15 +4162,7 @@ msdos_abort (void)
   dos_ttcooked ();
   ScreenSetCursor (10, 0);
   cputs ("\r\n\nEmacs aborted!\r\n");
-#if __DJGPP__ == 2 && __DJGPP_MINOR__ < 2
-  if (screen_virtual_segment)
-    dosv_refresh_virtual_screen (2 * 10 * screen_size_X, 4 * screen_size_X);
-  /* Generate traceback, so we could tell whodunit.  */
-  signal (SIGINT, SIG_DFL);
-  __asm__ __volatile__ ("movb $0x1b,%al;call ___djgpp_hw_exception");
-#else  /* __DJGPP_MINOR__ >= 2 */
   raise (SIGABRT);
-#endif /* __DJGPP_MINOR__ >= 2 */
   exit (2);
 }