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support vax on BSDs.

* s/aix4-2.h (ORDINARY_LINK): ... here.

* lisp/Makefile.in (top_srcdir): Define.
(abs_top_builddir): Define.
(srcdir): Don't append `/..'.
(EMACS): Use ${abs_top_builddir}.
(all, compile, compile-always, compile-last): Don't set emacswd.
(update-subdirs, update-authors): Use $(top_srcdir) instead of
$(srcdir).
(lisp): Use $(srcdir) instead of @srcdir@.
* src/Makefile.in (abs_builddir): Define.
(bootstrap_exe): Use it.
(VPATH): Use $(srcdir) instead of @srcdir@.

* lisp/Makefile.in (EMACS): Arrange for it to work when we chdir.
(setwins, setwins_almost, setwins_for_subdirs):
Don't `cd'; output relative names.
(all, compile, compile-always, compile-last): Set emacswd.
(custom-deps, finder-data, autoloads, update-subdirs, compile-last):
Just cd to the lisp source dir so we can use relative file names.
* src/Makefile.in (bootstrap_exe): Use an absolute name.

* m/alpha.h (LINUX_SBRK_BUG): Remove definition.
* emacs.c (main): Remove code depending on LINUX_SBRK_BUG.

* s/bsd-common.h (BSD4_2, TABDLY, TAB3, HAVE_TERMIOS, NO_TERMIO)
(LIBS_DEBUG, SYSV_SYSTEM_DIR, UNEXEC, NARROWPROTO, BSD_PGRPS)
(LDAV_SYMBOL, KERNEL_FILE): Define (or undefine) here instead of
doing it in all files that include this one.
* s/gnu.h (BSD4_2, TABDLY, TAB3, HAVE_TERMIOS, NO_TERMIO)
(LIBS_DEBUG, SYSV_SYSTEM_DIR, UNEXEC, NARROWPROTO, BSD_PGRPS)
(LDAV_SYMBOL, KERNEL_FILE): Remove.
* s/freebsd.h (BSD4_2, TABDLY, TAB3, HAVE_TERMIOS, NO_TERMIO)
(LIBS_DEBUG, SYSV_SYSTEM_DIR, UNEXEC, NARROWPROTO, BSD_PGRPS)
(LDAV_SYMBOL, KERNEL_FILE): Remove.
* s/netbsd.h (BSD4_2, TABDLY, TAB3, HAVE_TERMIOS, NO_TERMIO)
(LIBS_DEBUG, SYSV_SYSTEM_DIR, UNEXEC, NARROWPROTO, BSD_PGRPS)
(LDAV_SYMBOL, KERNEL_FILE): Remove.

* s/usg5-4.h (sigsetmask, PTY_TTY_NAME_SPRINTF): Do not define,
it's undefined in all files that include this one.
(POSIX_SIGNALS): Define here instead of doing it in all files that
include this one.
* s/irix6-5.h (sigsetmask, PTY_TTY_NAME_SPRINTF): Do not undef.
(POSIX_SIGNALS): Do not define.
* s/sol2-6.h (sigsetmask, PTY_TTY_NAME_SPRINTF): Do not undef.
(POSIX_SIGNALS): Do not define.
* s/unixware.h (sigsetmask, PTY_TTY_NAME_SPRINTF): Do not undef.
(POSIX_SIGNALS): Do not define.

* s/unixware.h: Add the contents of s/usg-5-4-2.h.
* s/usg-5-4-2.h: Remove.

* configure.in: Remove support for old UNIX System V systems and
for Unixware on non-x86 machines.

* s/sol2-6.h: Add the contents of s/sol-2.3.h, s/sol-2.4.h, s/sol-2.5.h.
(LD_SWITCH_SYSTEM, USE_MMAP_FOR_BUFFERS): Remove #defines/#undef
that cancel each other.
* s/sol2-3.h:
* s/sol2-4.h:
* s/sol2-5.h: Remove.
* m/ibmrs6000.h: Remove code for USG5_4, this file is only used on AIX.
(NO_REMAP): Remove, unused.
(UNEXEC): Move definition ...
* s/aix4-2.h (UNEXEC): ... here.

* configure.in:	Remove support for Solaris on PPC and for old versions.

not support shared libraries.
* s/netbsd.h:
* s/freebsd.h: Likewise.

* s/lynxos.h: Remove file.

* unexec.c (unexec, adjust_lnnoptrs): Do not depend on
COFF_BSD_SYMBOLS, nothing defines it anymore.

* os.texi (System Environment): Do not mention lynxos.

* configure.in: Remove non-working lynxos port.

* emacs.c (standard_args):
(Fdump_emacs):
(syms_of_emacs): Remove code depending on HAVE_SHM.

* alloc.c: Remove HAVE_SHM dependent definition.

* Makefile.in (RUN_TEMACS): Do not depend on HAVE_SHM.

* emacs.c (USAGE4): Hard-code bug address.
(REPORT_EMACS_BUG_ADDRESS, REPORT_EMACS_BUG_PRETEST_ADDRESS): Remove.
(bug_reporting_address): Remove.
(main): Don't call bug_reporting_address.

* configure.in (--with-mmdf, --with-mail-unlink):
New options, off by default.
(--with-mailhost): New option to set default POP host.
(LIBXPM, LIBJPEG, LIBPNG, LIBTIFF, LIBGIF, LIBGPM, LIBS_MAIL)
(LIBHESIOD, LIBRESOLV, COM_ERRLIB, CRYPTOLIB, KRB5LIB, DESLIB, KRB4LIB):
New variables, substituted in Makefiles.
(try_libungif, ac_gif_lib_name): Replace with HAVE_GIF=maybe, LIBGIF.
(LIBGIF): Use AC_SUBST rather than AC_DEFINE.
(HAVE_LIBMAIL, HAVE_LIBLOCKFILE, HAVE_LIBCOM_ERR, HAVE_LIBCRYPTO)
(HAVE_LIBK5CRYPTO, HAVE_LIBKRB5, HAVE_LIBDES425, HAVE_LIBDES)
(HAVE_LIBKRB4, HAVE_LIBKRB): New AC_DEFINEs.

* lib-src/Makefile.in (KRB4LIB, DESLIB, KRB5LIB, CRYPTOLIB, COM_ERRLIB)
(HESIODLIB, LIBS_MAIL): Set using autoconf rather than cpp.
(BASE_CFLAGS): Remove (identical to CPP_CFLAGS).

* src/Makefile.in (XFT_LIBS, LIBXPM, LIBJPEG, LIBPNG, LIBTIFF, LIBGIF)
(LIBGPM, LIBRESOLV): Set using autoconf rather than cpp.

* xfns.c (Fx_create_frame):
* frame.c (Vdefault_frame_scroll_bars): Put non-GTK X scroll-bars on left.

* editfns.c (Fformat): Account for string precision when computing
field width (Bug#5710).

* frame.c (Vdefault_frame_scroll_bars): Set default to Qright for all window systems.

 configure.in <AC_CHECK_HEADERS>: Remove termcap.h.
 configure: Regenerated.
 src/Makefilie.in (termcapobj): Move termcap.o from here...
 (MSDOS_OBJ): ...to here.
 (termcapobj) [!LIBS_TERMCAP]: Remove specialized value, as it is
 now identical to when LIBS_TERMCAP is defined.
 src/term.c: Remove (ifdef'ed away) inclusion of termcap.h.
 src/cm.c: Remove (ifdef'ed away) inclusion of termcap.h.
 src/config.in: Regenerated.

* syntax.h (SETUP_BUFFER_SYNTAX_TABLE): New macro.
(SETUP_SYNTAX_TABLE, SETUP_SYNTAX_TABLE_FOR_OBJECT):
* syntax.c (find_defun_start, Fchar_syntax, Fmatching_paren, skip_chars):
* regex.c (regex_compile): Use it.
(re_compile_pattern): Don't set gl_state.current_syntax_table since
it's now set in regex_compile when/if we need it.

* lisp.h (ELSE_PENDING_SIGNALS): New macro.
(QUIT): Use it to consolidate code and remove redundancy.
* bytecode.c (BYTE_CODE_QUIT): Use it as well.

(in_classes): Use CONSP before XCAR/XCDR.

* src/keymap.c (Fwhere_is_internal): Use Fequal to compare
definitions, so that keyboard macros are correctly handled
(Bug#5481).

* lisp/macros.el (insert-kbd-macro): Look up keyboard macro
using the definition, not the name (Bug#5481).

 coding.c (decode_coding_emacs_mule): Fixup pointers to buffer
 text that could be relocated inside the call to emacs_mule_char.
 (emacs_mule_char): Use CODING_DECODE_CHAR instead of DECODE_CHAR.
 (CODING_DECODE_CHAR): Add a comment describing its purpose.

* charset.c (load_charset_map_from_file)
(load_charset_map_from_vector): Zero out allocated
charset_map_entries before using them.

* font.c (font_parse_fcname): Recognize "Book", "Condensed", and
"Semi-Condensed" keywords in GTK names (Bug#5646).

* xterm.c (XTflash): Move declarations before statements.

* gtkutil.c (xg_get_gdk_display): Remove (unused).
(xg_get_pixbuf_from_pix_and_mask, xg_create_frame_widgets)
(xg_toggle_notify_cb, xg_set_toolkit_scroll_bar_thumb)
(xg_create_tool_bar): Remove unused variables.
(x_wm_set_size_hint): Move declarations before statements.
(xg_create_frame_widgets): Remove variable grav,