* atimer.c (set_alarm): Remove dead code, all USG systems define
POSIX_SIGNALS.
* data.c (arith_error): Likewise.
* keyboard.c (input_available_signal, handle_user_signal)
(interrupt_signal): Likewise.
* process.c (sigchld_handler): Likewise.
(create_process): Remove if 0 code. Remove HPUX conditional when
!defined (POSIX_SIGNALS), it cannot be true.
* syssignal.h: Remove USG5_4 and USG conditionals when
!POSIX_SIGNALS, they cannot be true.
* 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.
* 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.
* 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.
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.
* 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.
