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* configure.ac (BROKEN_GETWD) [unixware]: New define.

* src/sysdep.c: Respect BROKEN_GETWD.

* configure.ac (GNU_LIBRARY_PENDING_OUTPUT_COUNT): Remove.
(PENDING_OUTPUT_COUNT): Absorb GNU_LIBRARY_PENDING_OUTPUT_COUNT.
(DISPNEW_NEEDS_STDIO_EXT): New define.

* src/dispnew.c (GNU_LIBRARY_PENDING_OUTPUT_COUNT, PENDING_OUTPUT_COUNT):
Let configure handle it.
(stdio_ext.h) [DISPNEW_NEEDS_STDIO_EXT]: Include it.

* nt/config.nt (GNU_LIBRARY_PENDING_OUTPUT_COUNT): Remove.
(PENDING_OUTPUT_COUNT): Define it as dispnew.c used to.

* admin/CPP-DEFINES (GNU_LIBRARY_PENDING_OUTPUT_COUNT): Remove.

Fixes: debbugs:11979

(Avoids some trailing whitespace in generated config.h.)

Without this change, 'configure' fails because the recently-added
wait3 prototype in config.h messes up later 'configure' tests.
Fix this problem by droping wait3 and WRETCODE, as they're
no longer needed on hosts that are current porting targets.
* configure.ac (wait3, WRETCODE): Remove, fixing a FIXME.
All uses changed to waitpid and WEXITSTATUS.
* src/syswait.h (WRETCODE): Remove, consistently with ../configure.ac.

* configure.ac (LIB_STANDARD, START_FILES) [FreeBSD]:
Don't include crtbegin.o and crtend.o.

Fixes: debbugs:12047

* configure.ac (DEVICE_SEP, IS_DEVICE_SEP, IS_DIRECTORY_SEP, IS_ANY_SEP):
Move here from src/lisp.h.

* src/lisp.h (IS_DIRECTORY_SEP, IS_DEVICE_SEP, IS_ANY_SEP):
Move to configure.ac.

* src/Makefile.in (S_FILE): No longer set by configure.

* msdos/sed1v2.inp (S_FILE): Update for format change.

* src/editfns.c (USER_FULL_NAME):
* src/emacs.c (SEPCHAR):
* src/process.h (NULL_DEVICE): Let configure set them.

This is a belt-and-braces approach.

* configure.ac: Related comment.

* configure.ac (AMPERSAND_FULL_NAME, subprocesses): Move here from conf_post.h.

* src/conf_post.h (AMPERSAND_FULL_NAME, subprocesses): Move to configure.ac.

* configure.ac (MOTIF): Check for /usr/include/openmotif
and /usr/(lib|lib64)/openmotif if --with-x-toolkit=motif.
* lwlib/lwlib-Xm.c (make_menu_in_widget): Remove unused variable.
* src/xfns.c (Fx_file_dialog): Change to SSDATA to avoid warnings.
* src/xterm.c (x_frame_of_widget): Remove redundant prototype.
Move under #ifdef USE_LUCID.
(x_create_toolkit_scroll_bar): Adjust scroll_bar_name
definition and usage to avoid warnings.

when removing src/s/sol2-6.h yesterday.

* configure.ac (USG5_4): Reintroduce this.
(opsysfile): Set to empty on irix6-5, sol2*, and unixware.

* src/conf_post.h [USG5_4]: Move remaining contents of s/usg5-4-common.h here.
* src/s/usg5-4-common.h: Remove file.

* configure.ac (wait3, WRETCODE): Move here from src/s/usg5-4-common.h.

* s/usg5-4-common.h (wait3, WRETCODE): Let configure set them.

* configure.ac (opsysfile): Set to s/usg5-4-common.h on irix6-5.

* src/conf_post.h [IRIX6_5]: Move remaining contents of s/irix6-5.h here.

* src/s/irix6-5.h: Remove file.

* configure.ac (opsysfile): Set to empty on darwin.

* src/conf_post.h [DARWIN_OS]: Move remaining contents of src/s/darwin.h here.

* src/s/darwin.h: Remove file.

* configure.ac (opsysfile): Set to empty on hpux*.

* src/conf_post.h [HPUX]: Move random, srandom here from s/hpux10-20.h.

* src/s/hpux10-20.h: Remove file, which is now empty.

* configure.ac (AH_BOTTOM): Use an include file, so that the
contents do not get processed by autoheader.  Eg this prevents undefs
being commented out, and is the recommended technique from the
autoconf manual.

* src/conf_post.h: New, split from configure.ac's AH_BOTTOM.

* src/Makefile.in (config_h): Add conf_post.h.
* src/makefile.w32-in (CONFIG_H): Add conf_post.h.

* Makefile.in (MAKEFILE_NAME): New macro.
($(MAKEFILE_NAME)): Rename rule from Makefile.
* configure.ac (epaths): Set MAKEFILE_NAME to a bogus value,
so that GNU 'make' isn't tempted to make the Makefile and then
regenerate config.status while config.status is running.

Fixes: debbugs:11214

* configure.ac (TIOCSIGSEND): Move here from src/s.

* src/s/usg5-4-common.h (TIOCSIGSEND): Let configure set it.
* src/s/irix6-5.h (TIOCSIGSEND): No more need to undefine.

* configure.ac (SIGNAL_H_AHB): New hack macro.
(opsysfile): Set to empty on netbsd, openbsd.
(AH_BOTTOM): Include signal.h if SIGNAL_H_AHB is defined.

* src/s/netbsd.h: Let configure include signal.h if needed.
Remove file, which is now empty.

* configure.ac (_longjmp, _setjmp): Move here from src/s.

* src/s/usg5-4-common.h (_longjmp, _setjmp): Let configure set them.
* src/s/irix6-5.h (_longjmp, _setjmp): No more need to undefine.

* configure.ac (opsysfile): Set to empty on aix4-2.

* src/s/aix4-2.h: Remove empty file.

(The autoconf manual says this is portable.)

* configure.ac (opsysfile): Set to empty on freebsd, gnu-linux,
gnu-kfreebsd; and to usg5-4-common.h on sol2*, unixware.

* src/s/freebsd.h, src/s/gnu-linux.h, src/s/sol2-6.h, src/s/unixware.h:
Remove empty files.

* .bzrignore: Add lib/stdalign.h.
* config.bat: Do not set NO_DECL_ALIGN; no longer needed.
Copy lib/stdalign.in.h to lib/stdalign.in-h as needed.
* configure.ac (HAVE_ATTRIBUTE_ALIGNED): Remove the code that
fiddles with this, as gnulib now does this for us.
* admin/merge-gnulib: Add environ, stdalign.
* m4/environ.m4: New file, from gnulib.
* lib/gnulib.mk, m4/gnulib-comp.m4: Regenerate.
* lib/stdalign.in.h, m4/stdalign.m4: New files, from gnulib.
* sed2v2.inp (HAVE_ATTRIBUTE_ALIGNED): Remove edit.
* sedlibmk.inp (STDALIGN_H, @GL_GENERATE_STDALIGN_H_TRUE@)
(GL_GENERATE_STDALIGN_H_FALSE): New edits.
* nt/config.nt (HAVE_ATTRIBUTE_ALIGNED): Remove.
* src/alloc.c (XMALLOC_BASE_ALIGNMENT, GC_POINTER_ALIGNMENT, pure_alloc):
Simplify by using alignof.
(pure_alloc) [! USE_LSB_TAG]: Don't over-align EMACS_INT values.
* src/lisp.h: Include <stdalign.h>.
(GCALIGNMENT): New macro and constant.
(DECL_ALIGN): Remove.  All uses replaced by alignas (GCALIGNMENT).
(USE_LSB_TAG): ifdef on alignas, not on DECL_ALIGN.
(stdalign): New macro, if not already defined.

* configure.ac (USE_X_TOOLKIT): Report toolkit as GTK3 if
--with-x-toolkit=gtk3 is used.

* configure.ac: Configure gnulib at the end, not before running
pkg-config.  This restores the behavior before 2012-06-22, when
higher-resolution time stamps were added, and fixes a bug whereby
LIB_PTHREAD was not used and gnulib's part of 'configure'
therefore incorrectly assumed that pthread_sigmask wasn't working.
Fix the problem with -lrt and clock_gettime a different way.
This should complete the fix for Bug#11884.
(pre_PKG_CONFIG_CFLAGS, pre_PKG_CONFIG_LIBS): New shell vars.

* configure.ac (GC_SETJMP_WORKS, GC_MARK_STACK): Move here from src/s.
(AH_BOTTOM): Move GC_SETJMP_WORKS GCC fallback to main body.

* src/s/aix4-2.h, src/s/freebsd.h, src/s/gnu-linux.h, src/s/hpux10-20.h:
* src/s/irix6-5.h, src/s/netbsd.h, src/s/sol2-6.h, src/s/unixware.h:
Let configure set GC_SETJMP_WORKS, GC_MARK_STACK.

* configure.ac (GC_MARK_SECONDARY_STACK): Move here from src/s.

* src/s/gnu-linux.h (GC_MARK_SECONDARY_STACK): Let configure set it.

* configure.ac (SETUP_SLAVE_PTY): Move here from src/s.
(FIRST_PTY_LETTER, PTY_NAME_SPRINTF): Combine sol2/unixware cases.

* src/s/usg5-4-common.h (SETUP_SLAVE_PTY): Let configure set it.
* src/s/irix6-5.h (SETUP_SLAVE_PTY): No more need to unset it.

* configure.ac (opsysfile): Set to empty on gnu, cygwin.

* src/s/bsd-common, src/s/cygwin.h: Remove empty files.
* src/s/freebsd.h, src/s/netbsd.h: Do not include bsd-common.h.

* configure.ac (BSD4_2, BSD_SYSTEM, USG, USG5, _AIX, CYGWIN)
(DARWIN_OS, GNU_LINUX, HPUX, IRIX6_5, SOLARIS2):
Move "system type" macros here from src/s.
(BSD_SYSTEM_AHB): New hack macro.
(AH_BOTTOM): Set BSD_SYSTEM, using BSD_SYSTEM_AHB.

* src/s/usg5-4-common.h (USG, USG5):
* src/s/template.h (USG5, USG, HPUX, BSD4_2, BSD_SYSTEM):
* src/s/sol2-6.h (SOLARIS2):
* src/s/irix6-5.h (IRIX6_5):
* src/s/hpux10-20.h (USG, USG5, HPUX):
* src/s/gnu-linux.h (USG, GNU_LINUX):
* src/s/freebsd.h (BSD_SYSTEM):
* src/s/darwin.h (BSD4_2, BSD_SYSTEM, DARWIN_OS):
* src/s/cygwin.h (CYGWIN):
* src/s/bsd-common.h (BSD_SYSTEM, BSD4_2):
* src/s/aix4-2.h (USG, USG5, _AIX): Move "system type" macros to configure.