Fix the MSDOS build.

 src/unexcoff.c [MSDOS]: Include libc/atexit.h.
 (copy_text_and_data): Zero out the atexit chain pointer before
 dumping Emacs.
 src/termhooks.h (encode_terminal_code): Update prototype.
 src/term.c (encode_terminal_code) [DOS_NT]: Make it externally
 visible for all DOS_NT ports, not just WINDOWSNT.
 (syms_of_term) [!MSDOS]: Don't define 'tty-menu-*' symbols on MSDOS.
 src/sysdep.c (emacs_sigaction_init, init_signals): Don't use SIGCHLD
 unless it is defined.
 (emacs_pipe) [MSDOS]: Redirect to 'pipe'.
 src/process.c (close_on_exec, accept4, process_socket): Move into
 the "ifdef subprocesses" part.
 (catch_child_signal): Condition by "ifdef subprocesses".
 (syms_of_process) <Qinternal_default_process_sentinel>
 <Qinternal_default_process_filter>: Condition by "ifdef subprocesses".
 src/msdos.h: Add prototypes for new functions.
 (EINPROGRESS): Define.
 (O_CLOEXEC): Define to zero.
 src/msdos.c (check_window_system): Remove unnecessary an
 incompatible duplicate function.
 (sys_opendir, readlinkat, faccessat, fstatat, unsetenv): New
 functions in support of new functionality.
 src/menu.c (single_menu_item): Add visual indication  of submenu
 also for menus on MSDOS frames.
 (Fx_popup_menu) [!MSDOS]: Do not call tty_menu_show on MSDOS.
 src/lisp.h (CHECK_PROCESS) [!subprocesses]: Do not define
 when async subprocesses aren't supported.
 src/font.h (FONT_WIDTH) [MSDOS]: MSDOS-specific definition.
 src/emacs.c (close_output_streams): Zero out errno before calling
 close_stream.
 src/dired.c [MSDOS]: Include msdos.h.
 src/conf_post.h (opendir) [MSDOS]: Redirect to sys_opendir.
 (DATA_START) [MSDOS]: Define.
 (SYSTEM_PURESIZE_EXTRA) [MSDOS]: Enlarge by 25K.
 src/callproc.c (block_child_signal, unblock_child_signal) [MSDOS]:
 Ifdef away for MSDOS.
 (record_kill_process) [MSDOS]: Ifdef away the entire body for MSDOS.
 (call_process_cleanup) [MSDOS]: Ifdef away portions not relevant
 for MSDOS.
 (call_process) [MSDOS]: Fix call sequence of dostounix_filename.
 Use temporary file template that is compatible with mkostemp.
 Move vfork-related portions under #ifndef MSDOS.
 (syms_of_callproc): Unify templates of MSDOS and WINDOWSNT.

 lisp/term/pc-win.el (x-list-fonts, x-get-selection-value): Provide
 doc strings, as required by snarf-documentation.

 msdos/sedlisp.inp:
 msdos/sedlibmk.inp:
 msdos/sedleim.inp:
 msdos/sed3v2.inp:
 msdos/sed2v2.inp:
 msdos/sed1v2.inp: Update Sed scripts for Emacs 24.4.
 msdos/inttypes.h: Add PRIdMAX.
 msdos/INSTALL: Update for Emacs 24.4.
 msdos/sedadmin.inp: New file.

1 files changed, 12 insertions, 1 deletions

diff --git a/src/unexcoff.c b/src/unexcoff.c
index 5710ac04570..043f3348d16 100644
--- a/src/unexcoff.c
+++ b/src/unexcoff.c
@@ -65,6 +65,8 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <crt0.h>   /* for _crt0_startup_flags and its bits */
 #include <sys/exceptn.h>
 static int save_djgpp_startup_flags;
+#include <libc/atexit.h>
+static struct __atexit *save_atexit_ptr;
 #define filehdr external_filehdr
 #define scnhdr external_scnhdr
 #define syment external_syment
@@ -82,7 +84,7 @@ struct aouthdr
   unsigned long	 	text_start;/* base of text used for this file */
   unsigned long	 	data_start;/* base of data used for this file */
 };
-#endif /* not MSDOS */
+#endif /* MSDOS */
 #else  /* not HAVE_COFF_H */
 #include <a.out.h>
 #endif /* not HAVE_COFF_H */
@@ -368,6 +370,12 @@ copy_text_and_data (int new, int a_out)
      and which might change the way that dumped Emacs works.  */
   save_djgpp_startup_flags = _crt0_startup_flags;
   _crt0_startup_flags &= ~(_CRT0_FLAG_NO_LFN | _CRT0_FLAG_NEARPTR);
+
+  /* Zero out the 'atexit' chain in the dumped executable, to avoid
+     calling the atexit functions twice.  (emacs.c:main installs an
+     atexit function.)  */
+  save_atexit_ptr = __atexit_ptr;
+  __atexit_ptr = NULL;
 #endif
 
   lseek (new, (long) text_scnptr, 0);
@@ -386,6 +394,9 @@ copy_text_and_data (int new, int a_out)
 
   /* Restore the startup flags.  */
   _crt0_startup_flags = save_djgpp_startup_flags;
+
+  /* Restore the atexit chain.  */
+  __atexit_ptr = save_atexit_ptr;
 #endif