Release GNU make 4.2.93

* NEWS: Update the release and date
* configure.ac: Update the release number

AUTHORS

@@ -68,12 +68,13 @@ Other contributors:
   David Boyce <dsb@boyski.com>
   Frank Heckenbach <f.heckenbach@fh-soft.de>
   Kaz Kylheku <kaz@kylheku.com>
+  Christof Warlich <cwarlich@gmx.de>
 
 With suggestions/comments/bug reports from a cast of ... well ...
 hundreds, anyway :)
 
 -------------------------------------------------------------------------------
-Copyright (C) 1997-2019 Free Software Foundation, Inc.
+Copyright (C) 1997-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

Basic.mk.template

@@ -10,7 +10,7 @@
 #
 #   make.exe -f Basic.mk
 #
-# Copyright (C) 2017-2019 Free Software Foundation, Inc.
+# Copyright (C) 2017-2020 Free Software Foundation, Inc.
 # This file is part of GNU Make.
 #
 # GNU Make is free software; you can redistribute it and/or modify it under

Makefile.am

@@ -1,6 +1,6 @@
 # This is a -*-Makefile-*-, or close enough
 #
-# Copyright (C) 1997-2019 Free Software Foundation, Inc.
+# Copyright (C) 1997-2020 Free Software Foundation, Inc.
 # This file is part of GNU Make.
 #
 # GNU Make is free software; you can redistribute it and/or modify it under
@@ -16,7 +16,7 @@
 # You should have received a copy of the GNU General Public License along with
 # this program.  If not, see <http://www.gnu.org/licenses/>.
 
-AUTOMAKE_OPTIONS = dist-bzip2 silent-rules std-options subdir-objects nostdinc
+AUTOMAKE_OPTIONS = dist-lzip silent-rules std-options subdir-objects nostdinc
 ACLOCAL_AMFLAGS = -I m4
 
 MAKE_HOST =	@MAKE_HOST@
@@ -95,7 +95,7 @@ test_FILES =	tests/run_make_tests tests/run_make_tests.bat \
 		tests/run_make_tests.pl tests/test_driver.pl \
 		tests/config-flags.pm.in tests/config_flags_pm.com \
 		tests/config-flags.pm.W32 \
-		tests/mkshadow tests/jhelp.pl tests/guile.supp tests/README
+		tests/mkshadow tests/thelp.pl tests/guile.supp tests/README
 # test/scripts are added via dist-hook below.
 
 EXTRA_DIST =	ChangeLog README build.sh build.cfg.in $(man_MANS) \

NEWS

@@ -1,6 +1,6 @@
 GNU make NEWS                                               -*-indented-text-*-
   History of user-visible changes.
-  8 October 2019
+  3 January 2020
 
 See the end of this file for copyrights and conditions.
 
@@ -9,7 +9,7 @@ which is contained in this distribution as the file doc/make.texi.
 See the README file and the GNU make manual for instructions for
 reporting bugs.
 
-Version 4.2.92 (08 Oct 2019)
+Version 4.2.93 (03 Jan 2020)
 
 A complete list of bugs fixed in this version is available here:
 
@@ -35,14 +35,6 @@ http://sv.gnu.org/bugs/index.php?group=make&report_id=111&fix_release_id=108&set
   already contains some value.  Similarly, appending an empty string does not
   add a trailing space.
 
-* WARNING: Backward-incompatibility!
-  On Linux, and any other systems that provide a /proc/loadavg with similar
-  syntax, the -l/--load-average option will consult that file to determine how
-  many CPUs are busy at that moment and compare that value to the load value
-  requested.  This allows usage such as "-j -lN" for N-processor systems
-  without fear of overload during initial startup.
-  Patch provided by Sven C. Dack <sven.c.dack@sky.com>
-
 * WARNING: Backward-incompatibility!
   Contrary to the documentation, suffix rules with prerequisites were being
   treated BOTH as simple targets AND as pattern rules.  Behavior now matches
@@ -56,6 +48,13 @@ http://sv.gnu.org/bugs/index.php?group=make&report_id=111&fix_release_id=108&set
   search for 'grouped-target' in the .FEATURES special variable.
   Implementation contributed by Kaz Kylheku <kaz@kylheku.com>
 
+* New feature: .EXTRA_PREREQS variable
+  Words in this variable are considered prerequisites of targets but they are
+  not added to any of the automatic variable values when expanding the
+  recipe.  This variable can either be global (applies to all targets) or
+  a target-specific variable.  To detect this feature search for 'extra-prereqs'
+  in the .FEATURES special variable.
+
 * Makefiles can now specify the '-j' option in their MAKEFLAGS variable and
   this will cause make to enable that parallelism mode.
 
@@ -1611,7 +1610,7 @@ Version 3.05
 (Changes from versions 1 through 3.05 were never recorded.  Sorry.)
 
 -------------------------------------------------------------------------------
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

README.Amiga

@@ -64,7 +64,7 @@ If you plan to use recursive makes, install make resident:
 
 
 -------------------------------------------------------------------------------
-Copyright (C) 1995-2019 Free Software Foundation, Inc.
+Copyright (C) 1995-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

README.DOS.template

@@ -280,7 +280,7 @@ Bug reports:
 
 
 -------------------------------------------------------------------------------
-Copyright (C) 1996-2019 Free Software Foundation, Inc.
+Copyright (C) 1996-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

README.OS2.template

@@ -160,7 +160,7 @@ from the make source tree.
 
 
 -------------------------------------------------------------------------------
-Copyright (C) 2003-2019 Free Software Foundation, Inc.
+Copyright (C) 2003-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

README.W32.template

@@ -345,7 +345,7 @@ Bug reports:
         is described in the GNU make manual and the base README.
 
 -------------------------------------------------------------------------------
-Copyright (C) 1996-2019 Free Software Foundation, Inc.
+Copyright (C) 1996-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

README.customs

@@ -96,7 +96,7 @@ SunOS 4.1.x:
 
 
 -------------------------------------------------------------------------------
-Copyright (C) 1998-2019 Free Software Foundation, Inc.
+Copyright (C) 1998-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

README.git

@@ -1,7 +1,7 @@
                                                                      -*-text-*-
 
 -------------------------------------------------------------------------------
-Copyright (C) 2002-2019 Free Software Foundation, Inc.
+Copyright (C) 2002-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the
@@ -88,7 +88,11 @@ need to install the following extra software:
 * GCC (Clang's GCC emulation is not sufficient)
 * GNU make (POSIX make is not sufficient)
 
-And any tools that those utilities require (GNU m4, Perl, etc.)
+And any tools that those utilities require (GNU m4, etc.)
+
+To run the tests you must install Perl.
+
+To build a release you'll need to install lzip.
 
 GNU make requires gnulib to provide some facilities.  If you want to maintain
 a local installation of gnulib you can set GNULIB_SRCDIR to point to it.
@@ -166,16 +170,16 @@ run:
 
 and, if you like:
 
-  $ make dist-bzip2
+  $ make dist-lzip
 
 Even better, you should run this:
 
   $ make distcheck
 
-Which will build both .gz and .bz2 package files, then unpack them into
-a temporary location, try to build them, and repack them, verifying that
-everything works, you get the same results, _and_ no extraneous files
-are left over after the "distclean" rule.
+Which will build both .gz and .lz package files, then unpack one into a
+temporary location, try to build it and repack it, then verifying that
+everything works, you get the same results, _and_ no extraneous files are
+left over after the "distclean" rule.
 
 This package can be unpacked and built to give a "normal" (non-maintainer
 mode) result.

README.template

@@ -172,7 +172,7 @@ at the right README!
 
 
 -------------------------------------------------------------------------------
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

TODO.private

@@ -101,7 +101,7 @@ The Rest of the List
 
 
 -------------------------------------------------------------------------------
-Copyright (C) 1997-2019 Free Software Foundation, Inc.
+Copyright (C) 1997-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

bootstrap.bat

@@ -1,5 +1,5 @@
 @echo off
-:: Copyright (C) 2018-2019 Free Software Foundation, Inc.
+:: Copyright (C) 2018-2020 Free Software Foundation, Inc.
 :: This file is part of GNU Make.
 ::
 :: GNU Make is free software; you can redistribute it and/or modify it under
@@ -30,5 +30,5 @@ if ERRORLEVEL 1 exit /b 1
 goto :EOF
 
 :Done
-echo Done.  Run buld_w32.bat to build GNU make.
+echo Done.  Run build_w32.bat to build GNU make.
 goto :EOF

bootstrap.conf

@@ -1,6 +1,6 @@
 # Bootstrap configuration.                                   -*-shell-script-*-
 
-# Copyright (C) 2018-2019 Free Software Foundation, Inc.
+# Copyright (C) 2018-2020 Free Software Foundation, Inc.
 
 # GNU Make is free software: you can redistribute it and/or modify it under
 # the terms of the GNU General Public License as published by the Free

build.cfg.in

@@ -1,7 +1,7 @@
 # Configuration for building GNU Make in the absence of any 'make' program.
 # @configure_input@
 
-# Copyright (C) 1993-2019 Free Software Foundation, Inc.
+# Copyright (C) 1993-2020 Free Software Foundation, Inc.
 # This file is part of GNU Make.
 #
 # GNU Make is free software; you can redistribute it and/or modify it under

build.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
 # Shell script to build GNU Make in the absence of any 'make' program.
 
-# Copyright (C) 1993-2019 Free Software Foundation, Inc.
+# Copyright (C) 1993-2020 Free Software Foundation, Inc.
 # This file is part of GNU Make.
 #
 # GNU Make is free software; you can redistribute it and/or modify it under

build_w32.bat

@@ -1,5 +1,5 @@
 @echo off
-:: Copyright (C) 1996-2019 Free Software Foundation, Inc.
+:: Copyright (C) 1996-2020 Free Software Foundation, Inc.
 :: This file is part of GNU Make.
 ::
 :: GNU Make is free software; you can redistribute it and/or modify it under

builddos.bat

@@ -1,5 +1,5 @@
 @echo off
-rem Copyright (C) 1998-2019 Free Software Foundation, Inc.
+rem Copyright (C) 1998-2020 Free Software Foundation, Inc.
 rem This file is part of GNU Make.
 rem
 rem GNU Make is free software; you can redistribute it and/or modify it under

configure.ac

@@ -1,6 +1,6 @@
 # Process this file with autoconf to produce a configure script.
 #
-# Copyright (C) 1993-2019 Free Software Foundation, Inc.
+# Copyright (C) 1993-2020 Free Software Foundation, Inc.
 # This file is part of GNU Make.
 #
 # GNU Make is free software; you can redistribute it and/or modify it under
@@ -16,7 +16,7 @@
 # You should have received a copy of the GNU General Public License along with
 # this program.  If not, see <http://www.gnu.org/licenses/>.
 
-AC_INIT([GNU make],[4.2.92],[bug-make@gnu.org])
+AC_INIT([GNU make],[4.2.93],[bug-make@gnu.org])
 
 AC_PREREQ([2.69])
 
@@ -138,7 +138,7 @@ AS_IF([test "$ac_cv_func_gettimeofday" = yes],
             [Define to 1 if you have a standard gettimeofday function])
 ])
 
-AC_CHECK_FUNCS([strdup strndup umask mkstemp mktemp fdopen \
+AC_CHECK_FUNCS([strdup strndup memrchr umask mkstemp mktemp fdopen \
                 dup dup2 getcwd realpath sigsetmask sigaction \
                 getgroups seteuid setegid setlinebuf setreuid setregid \
                 getrlimit setrlimit setvbuf pipe strsignal \
@@ -371,7 +371,28 @@ AC_ARG_ENABLE([posix-spawn],
 AS_CASE([/$ac_cv_header_spawn/$ac_cv_func_posix_spawn/],
   [*/no/*], [make_cv_posix_spawn=no])
 
-AS_CASE([/$make_cv_posix_spawn/$user_posix_spawn/],
+AS_IF([test "$make_cv_posix_spawn" = yes],
+  AC_CACHE_CHECK([for posix_spawn that fails synchronously],
+    [make_cv_synchronous_posix_spawn],
+    [make_cv_synchronous_posix_spawn=no
+     AC_RUN_IFELSE([AC_LANG_SOURCE([[
+       #include <spawn.h>
+       #include <string.h>
+
+       extern char **environ;
+
+       int main() {
+         char* path = strdup("./non-existent");
+         char *argv[[2]];
+         argv[[0]] = path;
+         argv[[1]] =  0;
+         return posix_spawn(0, path, 0, 0, argv, environ);
+       }]])],
+       [make_cv_synchronous_posix_spawn=no],
+       [make_cv_synchronous_posix_spawn=yes],
+       [make_cv_synchronous_posix_spawn="no (cross-compiling)"])]))
+
+AS_CASE([/$user_posix_spawn/$make_cv_posix_spawn/$make_cv_synchronous_posix_spawn/],
   [*/no/*], [make_cv_posix_spawn=no],
   [AC_DEFINE(USE_POSIX_SPAWN, 1, [Define to 1 to use posix_spawn().])
   ])

doc/Makefile.am

@@ -1,5 +1,5 @@
 # -*-Makefile-*-, or close enough
-# Copyright (C) 2000-2019 Free Software Foundation, Inc.
+# Copyright (C) 2000-2020 Free Software Foundation, Inc.
 # This file is part of GNU Make.
 #
 # GNU Make is free software; you can redistribute it and/or modify it under

doc/make.1

@@ -361,7 +361,7 @@ This manual page contributed by Dennis Morse of Stanford University.
 Further updates contributed by Mike Frysinger.  It has been reworked by Roland
 McGrath.  Maintained by Paul Smith.
 .SH "COPYRIGHT"
-Copyright \(co 1992-1993, 1996-2019 Free Software Foundation, Inc.
+Copyright \(co 1992-1993, 1996-2020 Free Software Foundation, Inc.
 This file is part of
 .IR "GNU make" .
 .LP

doc/make.texi

@@ -26,8 +26,8 @@ of @cite{The GNU Make Manual}, for GNU @code{make} version @value{VERSION}.
 
 Copyright @copyright{} 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
 1996, 1997, 1998, 1999, 2000, 2002, 2003, 2004, 2005, 2006, 2007,
-2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019
-Free Software Foundation, Inc.
+2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019,
+2020 Free Software Foundation, Inc.
 
 @quotation
 Permission is granted to copy, distribute and/or modify this document
@@ -6631,6 +6631,57 @@ Supports dynamically loadable objects for creating custom extensions.
 Expands to a list of directories that @code{make} searches for
 included makefiles (@pxref{Include, , Including Other Makefiles}).
 
+@vindex .EXTRA_PREREQS @r{(prerequisites not added to automatic variables)}
+@item .EXTRA_PREREQS
+Each word in this variable is a new prerequisite which is added to
+targets for which it is set.  These prerequisites differ from normal
+prerequisites in that they do not appear in any of the automatic
+variables (@pxref{Automatic Variables}).  This allows prerequisites to
+be defined which do not impact the recipe.
+
+Consider a rule to link a program:
+
+@example
+myprog: myprog.o file1.o file2.o
+       $(CC) $(CFLAGS) $(LDFLAGS) -o $@@ $^ $(LDLIBS)
+@end example
+
+Now suppose you want to enhance this makefile to ensure that updates
+to the compiler cause the program to be re-linked.  You can add the
+compiler as a prerequisite, but you must ensure that it's not passed
+as an argument to link command.  You'll need something like this:
+
+@example
+myprog: myprog.o file1.o file2.o $(CC)
+       $(CC) $(CFLAGS) $(LDFLAGS) -o $@@ $(filter-out $(CC),$^) $(LDLIBS)
+@end example
+
+Then consider having multiple extra prerequisites: they would all have
+to be filtered out.  Using @code{.EXTRA_PREREQS} and target-specific
+variables provides a simpler solution:
+
+@example
+myprog: myprog.o file1.o file2.o
+       $(CC) $(CFLAGS) $(LDFLAGS) -o $@@ $^ $(LDLIBS)
+myprog: .EXTRA_PREREQS = $(CC)
+@end example
+
+This feature can also be useful if you want to add prerequisites to a
+makefile you cannot easily modify: you can create a new file such as
+@file{extra.mk}:
+
+@example
+myprog: .EXTRA_PREREQS = $(CC)
+@end example
+
+then invoke @code{make -f extra.mk -f Makefile}.
+
+Setting @code{.EXTRA_PREREQS} globally will cause those prerequisites
+to be added to all targets (which did not themselves override it with
+a target-specific value).  Note @code{make} is smart enough not to add
+a prerequisite listed in @code{.EXTRA_PREREQS} as a prerequisite to
+itself.
+
 @end table
 
 @node Conditionals, Functions, Using Variables, Top

m4/acinclude.m4

@@ -1,7 +1,7 @@
 dnl acinclude.m4 -- Extra macros needed for GNU make.
 dnl
 dnl Automake will incorporate this into its generated aclocal.m4.
-dnl Copyright (C) 1998-2019 Free Software Foundation, Inc.
+dnl Copyright (C) 1998-2020 Free Software Foundation, Inc.
 dnl This file is part of GNU Make.
 dnl
 dnl GNU Make is free software; you can redistribute it and/or modify it under

m4/dospaths.m4

@@ -1,7 +1,7 @@
 # Test if the system uses DOS-style pathnames (drive specs and backslashes)
 # By Paul Smith <psmith@gnu.org>.  Based on dos.m4 by Jim Meyering.
 #
-# Copyright (C) 1993-2019 Free Software Foundation, Inc.
+# Copyright (C) 1993-2020 Free Software Foundation, Inc.
 # This file is part of GNU Make.
 #
 # GNU Make is free software; you can redistribute it and/or modify it under

maintMakefile

@@ -483,7 +483,7 @@ $(UPLOADS): $(DIST_ARCHIVES) $(DIST_ARCHIVES_SIG) $(DIST_ARCHIVES_DIRECTIVE)
 # Rebuild Makefile.in if this file is modifed.
 Makefile.in: maintMakefile
 
-# Copyright (C) 1997-2019 Free Software Foundation, Inc.
+# Copyright (C) 1997-2020 Free Software Foundation, Inc.
 # This file is part of GNU Make.
 #
 # GNU Make is free software; you can redistribute it and/or modify it under

makefile.com

@@ -154,7 +154,7 @@ $ exit
 $ endsubroutine : compileit
 $!
 $!-----------------------------------------------------------------------------
-$!Copyright (C) 1996-2019 Free Software Foundation, Inc.
+$!Copyright (C) 1996-2020 Free Software Foundation, Inc.
 $!This file is part of GNU Make.
 $!
 $!GNU Make is free software; you can redistribute it and/or modify it under

mk/Amiga.mk

@@ -2,7 +2,7 @@
 #
 # Amiga overrides for use with Basic.mk.
 #
-# Copyright (C) 2017-2019 Free Software Foundation, Inc.
+# Copyright (C) 2017-2020 Free Software Foundation, Inc.
 # This file is part of GNU Make.
 #
 # GNU Make is free software; you can redistribute it and/or modify it under

mk/Posix.mk.in

@@ -2,7 +2,7 @@
 #
 # POSIX overrides for use with Basic.mk.
 #
-# Copyright (C) 2017-2019 Free Software Foundation, Inc.
+# Copyright (C) 2017-2020 Free Software Foundation, Inc.
 # This file is part of GNU Make.
 #
 # GNU Make is free software; you can redistribute it and/or modify it under

mk/VMS.mk

@@ -2,7 +2,7 @@
 #
 # VMS overrides for use with Basic.mk.
 #
-# Copyright (C) 2017-2019 Free Software Foundation, Inc.
+# Copyright (C) 2017-2020 Free Software Foundation, Inc.
 # This file is part of GNU Make.
 #
 # GNU Make is free software; you can redistribute it and/or modify it under

mk/Windows32.mk

@@ -2,7 +2,7 @@
 #
 # Windows overrides for use with Basic.mk.
 #
-# Copyright (C) 2017-2019 Free Software Foundation, Inc.
+# Copyright (C) 2017-2020 Free Software Foundation, Inc.
 # This file is part of GNU Make.
 #
 # GNU Make is free software; you can redistribute it and/or modify it under

mk/msdosdjgpp.mk

@@ -2,7 +2,7 @@
 #
 # MS-DOS overrides for use with Basic.mk.
 #
-# Copyright (C) 2017-2019 Free Software Foundation, Inc.
+# Copyright (C) 2017-2020 Free Software Foundation, Inc.
 # This file is part of GNU Make.
 #
 # GNU Make is free software; you can redistribute it and/or modify it under

po/POTFILES.in

@@ -1,5 +1,5 @@
 # List of source files containing translatable strings.
-# Copyright (C) 2000-2019 Free Software Foundation, Inc.
+# Copyright (C) 2000-2020 Free Software Foundation, Inc.
 # This file is part of GNU Make.
 #
 # GNU Make is free software; you can redistribute it and/or modify it under

scripts/copyright-update

@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# Copyright (C) 2014-2019 Free Software Foundation, Inc.
+# Copyright (C) 2014-2020 Free Software Foundation, Inc.
 # This file is part of GNU Make.
 #
 # Update GNU make copyrights using gnulib update-copyright

src/amiga.c

@@ -1,5 +1,5 @@
 /* Running commands on Amiga
-Copyright (C) 1995-2019 Free Software Foundation, Inc.
+Copyright (C) 1995-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/amiga.h

@@ -1,5 +1,5 @@
 /* Definitions for amiga specific things
-Copyright (C) 1995-2019 Free Software Foundation, Inc.
+Copyright (C) 1995-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/ar.c

@@ -1,5 +1,5 @@
 /* Interface to 'ar' archives for GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 
 This file is part of GNU Make.
 

src/arscan.c

@@ -1,5 +1,5 @@
 /* Library function for scanning an archive file.
-Copyright (C) 1987-2019 Free Software Foundation, Inc.
+Copyright (C) 1987-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/commands.c

@@ -1,5 +1,5 @@
 /* Command processing for GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the
@@ -133,7 +133,7 @@ set_file_variables (struct file *file)
   /* $< is the first not order-only dependency.  */
   less = "";
   for (d = file->deps; d != 0; d = d->next)
-    if (!d->ignore_mtime)
+    if (!d->ignore_mtime && !d->ignore_automatic_vars)
       {
         if (!d->need_2nd_expansion)
           less = dep_name (d);
@@ -178,7 +178,7 @@ set_file_variables (struct file *file)
     bar_len = 0;
     for (d = file->deps; d != 0; d = d->next)
       {
-        if (!d->need_2nd_expansion)
+        if (!d->need_2nd_expansion && !d->ignore_automatic_vars)
           {
             if (d->ignore_mtime)
               bar_len += strlen (dep_name (d)) + 1;
@@ -200,7 +200,7 @@ set_file_variables (struct file *file)
 
     qmark_len = plus_len + 1;   /* Will be this or less.  */
     for (d = file->deps; d != 0; d = d->next)
-      if (! d->ignore_mtime && ! d->need_2nd_expansion)
+      if (! d->ignore_mtime && ! d->need_2nd_expansion && ! d->ignore_automatic_vars)
         {
           const char *c = dep_name (d);
 
@@ -247,7 +247,7 @@ set_file_variables (struct file *file)
 
     for (d = file->deps; d != 0; d = d->next)
       {
-        if (d->need_2nd_expansion)
+        if (d->need_2nd_expansion || d->ignore_automatic_vars)
           continue;
 
         slot = hash_find_slot (&dep_hash, d);
@@ -269,7 +269,7 @@ set_file_variables (struct file *file)
       {
         const char *c;
 
-        if (d->need_2nd_expansion || hash_find_item (&dep_hash, d) != d)
+        if (d->need_2nd_expansion || d->ignore_automatic_vars || hash_find_item (&dep_hash, d) != d)
           continue;
 
         c = dep_name (d);

src/commands.h

@@ -1,5 +1,5 @@
 /* Definition of data structures describing shell commands for GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/config.ami.template

@@ -1,5 +1,5 @@
 /* config.h -- hand-massaged for Amiga                                  -*-C-*-
-Copyright (C) 1995-2019 Free Software Foundation, Inc.
+Copyright (C) 1995-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/config.h-vms.template

@@ -1,6 +1,6 @@
 /* config.h-vms. Generated by hand by Klaus Kämpf <kkaempf@rmi.de>      -*-C-*-
 
-Copyright (C) 1996-2019 Free Software Foundation, Inc.
+Copyright (C) 1996-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/config.h.W32.template

@@ -1,6 +1,6 @@
 /* config.h.W32 -- hand-massaged config.h file for Windows builds       -*-C-*-
 
-Copyright (C) 1996-2019 Free Software Foundation, Inc.
+Copyright (C) 1996-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the
@@ -292,7 +292,10 @@ this program.  If not, see <http://www.gnu.org/licenses/>.  */
 /* #undef HAVE_STRSIGNAL */
 
 /* Define to 1 if `d_type' is a member of `struct dirent'. */
-#define HAVE_STRUCT_DIRENT_D_TYPE 1
+/* SV 57152: MinGW64 version of dirent doesn't support d_type. */
+#ifndef __MINGW64__
+# define HAVE_STRUCT_DIRENT_D_TYPE 1
+#endif
 
 /* Define to 1 if you have the `isatty' function. */
 #define HAVE_ISATTY 1

src/configh.dos.template

@@ -1,6 +1,6 @@
 /* configh.dos -- hand-massaged config.h file for MS-DOS builds         -*-C-*-
 
-Copyright (C) 1994-2019 Free Software Foundation, Inc.
+Copyright (C) 1994-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/debug.h

@@ -1,5 +1,5 @@
 /* Debugging macros and interface.
-Copyright (C) 1999-2019 Free Software Foundation, Inc.
+Copyright (C) 1999-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/default.c

@@ -1,5 +1,5 @@
 /* Data base of default implicit rules for GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/dep.h

@@ -1,5 +1,5 @@
 /* Definitions of dependency data structures for GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the
@@ -48,7 +48,8 @@ struct nameseq
     unsigned int changed : 1;                   \
     unsigned int ignore_mtime : 1;              \
     unsigned int staticpattern : 1;             \
-    unsigned int need_2nd_expansion : 1
+    unsigned int need_2nd_expansion : 1;        \
+    unsigned int ignore_automatic_vars : 1
 
 struct dep
   {
@@ -74,6 +75,7 @@ struct goaldep
 #define PARSEFS_NOGLOB  0x0004
 #define PARSEFS_EXISTS  0x0008
 #define PARSEFS_NOCACHE 0x0010
+#define PARSEFS_ONEWORD 0x0020
 
 #define PARSE_FILE_SEQ(_s,_t,_c,_p,_f) \
             (_t *)parse_file_seq ((_s),sizeof (_t),(_c),(_p),(_f))

src/dir.c

@@ -1,5 +1,5 @@
 /* Directory hashing for GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/expand.c

@@ -1,5 +1,5 @@
 /* Variable expansion functions for GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/file.c

@@ -1,5 +1,5 @@
 /* Target file management for GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the
@@ -550,15 +550,6 @@ enter_prereqs (struct dep *deps, const char *stem)
   return deps;
 }
 
-/* Set the intermediate flag.  */
-
-static void
-set_intermediate (const void *item)
-{
-  struct file *f = (struct file *) item;
-  f->intermediate = 1;
-}
-
 /* Expand and parse each dependency line. */
 static void
 expand_deps (struct file *f)
@@ -644,13 +635,69 @@ expand_deps (struct file *f)
     }
 }
 
-/* Reset the updating flag.  */
+/* Add extra prereqs to the file in question.  */
+
+struct dep *
+expand_extra_prereqs (const struct variable *extra)
+{
+  struct dep *prereqs = extra ? split_prereqs (variable_expand (extra->value)) : NULL;
+
+  for (struct dep *d = prereqs; d; d = d->next)
+    {
+      d->file = lookup_file (d->name);
+      if (!d->file)
+        d->file = enter_file (d->name);
+      d->name = NULL;
+      d->ignore_automatic_vars = 1;
+    }
+
+  return prereqs;
+}
+
+/* Perform per-file snap operations. */
 
 static void
-reset_updating (const void *item)
+snap_file (const void *item, void *arg)
 {
-  struct file *f = (struct file *) item;
-  f->updating = 0;
+  struct file *f = (struct file*)item;
+  struct dep *prereqs = NULL;
+
+  /* If we're not doing second expansion then reset updating.  */
+  if (!second_expansion)
+    f->updating = 0;
+
+  /* If .SECONDARY is set with no deps, mark all targets as intermediate.  */
+  if (all_secondary)
+    f->intermediate = 1;
+
+  /* If .EXTRA_PREREQS is set, add them as ignored by automatic variables.  */
+  if (f->variables)
+    prereqs = expand_extra_prereqs (lookup_variable_in_set (STRING_SIZE_TUPLE(".EXTRA_PREREQS"), f->variables->set));
+
+  else if (f->is_target)
+    prereqs = copy_dep_chain (arg);
+
+  if (prereqs)
+    {
+      struct dep *d;
+      for (d = prereqs; d; d = d->next)
+        if (streq (f->name, dep_name (d)))
+          /* Skip circular dependencies.  */
+          break;
+
+      if (d)
+        /* We broke early: must have found a circular dependency.  */
+        free_dep_chain (prereqs);
+      else if (!f->deps)
+        f->deps = prereqs;
+      else
+        {
+          d = f->deps;
+          while (d->next)
+            d = d->next;
+          d->next = prereqs;
+        }
+    }
 }
 
 /* For each dependency of each file, make the 'struct dep' point
@@ -700,9 +747,6 @@ snap_deps (void)
             expand_deps (f);
       free (file_slot_0);
     }
-  else
-    /* We're not doing second expansion, so reset updating.  */
-    hash_map (&files, reset_updating);
 
   /* Now manage all the special targets.  */
 
@@ -744,10 +788,7 @@ snap_deps (void)
           f2->intermediate = f2->secondary = 1;
     /* .SECONDARY with no deps listed marks *all* files that way.  */
     else
-      {
-        all_secondary = 1;
-        hash_map (&files, set_intermediate);
-      }
+      all_secondary = 1;
 
   f = lookup_file (".EXPORT_ALL_VARIABLES");
   if (f != 0 && f->is_target)
@@ -779,6 +820,15 @@ snap_deps (void)
   if (f != 0 && f->is_target)
     not_parallel = 1;
 
+  {
+    struct dep *prereqs = expand_extra_prereqs (lookup_variable (STRING_SIZE_TUPLE(".EXTRA_PREREQS")));
+
+    /* Perform per-file snap operations.  */
+    hash_map_arg(&files, snap_file, prereqs);
+
+    free_dep_chain (prereqs);
+  }
+
 #ifndef NO_MINUS_C_MINUS_O
   /* If .POSIX was defined, remove OUTPUT_OPTION to comply.  */
   /* This needs more work: what if the user sets this in the makefile?

src/filedef.h

@@ -1,5 +1,5 @@
 /* Definition of target file data structures for GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the
@@ -21,6 +21,11 @@ this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "hash.h"
 
+struct commands;
+struct dep;
+struct variable;
+struct variable_set_list;
+
 struct file
   {
     const char *name;
@@ -110,6 +115,7 @@ struct file *lookup_file (const char *name);
 struct file *enter_file (const char *name);
 struct dep *split_prereqs (char *prereqstr);
 struct dep *enter_prereqs (struct dep *prereqs, const char *stem);
+struct dep *expand_extra_prereqs (const struct variable *extra);
 void remove_intermediates (int sig);
 void snap_deps (void);
 void rename_file (struct file *file, const char *name);

src/function.c

@@ -1,5 +1,5 @@
 /* Builtin function expansion for GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/getopt.c

@@ -3,7 +3,7 @@ NOTE: getopt is now part of the C library, so if you don't know what
 "Keep this file name-space clean" means, talk to drepper@gnu.org
 before changing it!
 
-Copyright (C) 1987-2019 Free Software Foundation, Inc.
+Copyright (C) 1987-2020 Free Software Foundation, Inc.
 
 NOTE: The canonical source of this file is maintained with the GNU C Library.
 Bugs can be reported to bug-glibc@gnu.org.

src/getopt.h

@@ -1,5 +1,5 @@
 /* Declarations for getopt.
-Copyright (C) 1989-2019 Free Software Foundation, Inc.
+Copyright (C) 1989-2020 Free Software Foundation, Inc.
 
 NOTE: The canonical source of this file is maintained with the GNU C Library.
 Bugs can be reported to bug-glibc@gnu.org.

src/getopt1.c

@@ -1,5 +1,5 @@
 /* getopt_long and getopt_long_only entry points for GNU getopt.
-Copyright (C) 1987-1994, 1996-2019 Free Software Foundation, Inc.
+Copyright (C) 1987-1994, 1996-2020 Free Software Foundation, Inc.
 
 NOTE: The canonical source of this file is maintained with the GNU C Library.
 Bugs can be reported to bug-glibc@gnu.org.

src/gettext.h

@@ -1,5 +1,5 @@
 /* Convenience header for conditional use of GNU <libintl.h>.
-Copyright (C) 1995-2019 Free Software Foundation, Inc.
+Copyright (C) 1995-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/gmk-default.scm

@@ -1,5 +1,5 @@
 ;; Contents of the (gnu make) Guile module
-;; Copyright (C) 2011-2019 Free Software Foundation, Inc.
+;; Copyright (C) 2011-2020 Free Software Foundation, Inc.
 ;; This file is part of GNU Make.
 ;;
 ;; GNU Make is free software; you can redistribute it and/or modify it under

src/gnumake.h

@@ -1,7 +1,7 @@
 /* External interfaces usable by dynamic objects loaded into GNU Make.
    --THIS API IS A "TECHNOLOGY PREVIEW" ONLY.  IT IS NOT A STABLE INTERFACE--
 
-Copyright (C) 2013-2019 Free Software Foundation, Inc.
+Copyright (C) 2013-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/guile.c

@@ -1,5 +1,5 @@
 /* GNU Guile interface for GNU Make.
-Copyright (C) 2011-2019 Free Software Foundation, Inc.
+Copyright (C) 2011-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/implicit.c

@@ -1,5 +1,5 @@
 /* Implicit rule searching for GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the
@@ -152,6 +152,7 @@ struct patdeps
     const char *pattern;
     struct file *file;
     unsigned int ignore_mtime : 1;
+    unsigned int ignore_automatic_vars : 1;
   };
 
 /* This structure stores information about pattern rules that we need
@@ -220,8 +221,9 @@ pattern_search (struct file *file, int archive,
   struct patdeps *deplist = xmalloc (max_deps * sizeof (struct patdeps));
   struct patdeps *pat = deplist;
 
-  /* Names of possible dependencies are constructed in this buffer.  */
-  char *depname = alloca (namelen + max_pattern_dep_length);
+  /* Names of possible dependencies are constructed in this buffer.
+     We may replace % by $(*F) for second expansion, increasing the length.  */
+  char *depname = alloca (namelen + max_pattern_dep_length + 4);
 
   /* The start and length of the stem of FILENAME for the current rule.  */
   const char *stem = 0;
@@ -265,7 +267,7 @@ pattern_search (struct file *file, int archive,
       /* Set LASTSLASH to point at the last slash in FILENAME
          but not counting any slash at the end.  (foo/bar/ counts as
          bar/ in directory foo/, not empty in directory foo/bar/.)  */
-      lastslash = strrchr (filename, '/');
+      lastslash = memrchr (filename, '/', namelen - 1);
 #ifdef VMS
       if (lastslash == NULL)
         lastslash = strrchr (filename, ']');
@@ -278,18 +280,16 @@ pattern_search (struct file *file, int archive,
       /* Handle backslashes (possibly mixed with forward slashes)
          and the case of "d:file".  */
       {
-        char *bslash = strrchr (filename, '\\');
+        char *bslash = memrchr (filename, '\\', namelen - 1);
         if (lastslash == 0 || bslash > lastslash)
           lastslash = bslash;
         if (lastslash == 0 && filename[0] && filename[1] == ':')
           lastslash = filename + 1;
       }
 #endif
-      if (lastslash != 0 && lastslash[1] == '\0')
-        lastslash = 0;
     }
 
-  pathlen = lastslash - filename + 1;
+  pathlen = lastslash ? lastslash - filename + 1 : 0;
 
   /* First see which pattern rules match this target and may be considered.
      Put them in TRYRULES.  */
@@ -443,7 +443,6 @@ pattern_search (struct file *file, int archive,
           unsigned int deps_found = 0;
           /* NPTR points to the part of the prereq we haven't processed.  */
           const char *nptr = 0;
-          const char *dir = NULL;
           int order_only = 0;
           unsigned int matches;
 
@@ -478,12 +477,12 @@ pattern_search (struct file *file, int archive,
                   memcpy (pathdir, filename, pathlen);
                   pathdir[pathlen] = '\0';
                 }
-              dir = pathdir;
             }
 
-          if (stemlen > GET_PATH_MAX)
+          if (stemlen + (check_lastslash ? pathlen : 0) > GET_PATH_MAX)
             {
-              DBS (DB_IMPLICIT, (_("Stem too long: '%.*s'.\n"),
+              DBS (DB_IMPLICIT, (_("Stem too long: '%s%.*s'.\n"),
+                                 check_lastslash ? pathdir : "",
                                  (int) stemlen, stem));
               continue;
             }
@@ -491,8 +490,19 @@ pattern_search (struct file *file, int archive,
           DBS (DB_IMPLICIT, (_("Trying pattern rule with stem '%.*s'.\n"),
                              (int) stemlen, stem));
 
-          strncpy (stem_str, stem, stemlen);
-          stem_str[stemlen] = '\0';
+          if (!check_lastslash)
+            {
+              memcpy (stem_str, stem, stemlen);
+              stem_str[stemlen] = '\0';
+            }
+          else
+            {
+              /* We want to prepend the directory from
+                 the original FILENAME onto the stem.  */
+              memcpy (stem_str, filename, pathlen);
+              memcpy (stem_str + pathlen, stem, stemlen);
+              stem_str[pathlen + stemlen] = '\0';
+            }
 
           /* If there are no prerequisites, then this rule matches.  */
           if (rule->deps == 0)
@@ -543,18 +553,19 @@ pattern_search (struct file *file, int archive,
                         }
                       memcpy (o, nptr, p - nptr);
                       o += p - nptr;
-                      memcpy (o, stem_str, stemlen);
+                      memcpy (o, stem, stemlen);
                       o += stemlen;
                       strcpy (o, p + 1);
                     }
 
                   /* Parse the expanded string.  It might have wildcards.  */
                   p = depname;
-                  dl = PARSE_SIMPLE_SEQ (&p, struct dep);
+                  dl = PARSE_FILE_SEQ (&p, struct dep, MAP_NUL, NULL, PARSEFS_ONEWORD);
                   for (d = dl; d != NULL; d = d->next)
                     {
                       ++deps_found;
                       d->ignore_mtime = dep->ignore_mtime;
+                      d->ignore_automatic_vars = dep->ignore_automatic_vars;
                     }
 
                   /* We've used up this dep, so next time get a new one.  */
@@ -594,10 +605,10 @@ pattern_search (struct file *file, int archive,
                      again.  This is not good if you have certain characters
                      in your stem (like $).
 
-                     Instead, we will replace % with $* and allow the second
-                     expansion to take care of it for us.  This way (since $*
-                     is a simple variable) there won't be additional
-                     re-expansion of the stem.  */
+                     Instead, we will replace % with $* or $(*F) and allow the
+                     second expansion to take care of it for us.  This way
+                     (since $* and $(*F) are simple variables) there won't be
+                     additional re-expansion of the stem.  */
 
                   p = lindex (nptr, nptr + len, '%');
                   if (p == 0)
@@ -608,13 +619,22 @@ pattern_search (struct file *file, int archive,
                   else
                     {
                       size_t i = p - nptr;
-                      memcpy (depname, nptr, i);
-                      memcpy (depname + i, "$*", 2);
-                      memcpy (depname + i + 2, p + 1, len - i - 1);
-                      depname[len + 2 - 1] = '\0';
-
+                      char *o = depname;
+                      memcpy (o, nptr, i);
+                      o += i;
                       if (check_lastslash)
-                        add_dir = 1;
+                        {
+                          add_dir = 1;
+                          memcpy (o, "$(*F)", 5);
+                          o += 5;
+                        }
+                      else
+                        {
+                          memcpy (o, "$*", 2);
+                          o += 2;
+                        }
+                      memcpy (o, p + 1, len - i - 1);
+                      o[len - i - 1] = '\0';
                     }
 
                   /* Set up for the next word.  */
@@ -646,7 +666,7 @@ pattern_search (struct file *file, int archive,
                       /* Parse the expanded string. */
                       struct dep *dp = PARSE_FILE_SEQ (&p, struct dep,
                                                        order_only ? MAP_NUL : MAP_PIPE,
-                                                       add_dir ? dir : NULL, PARSEFS_NONE);
+                                                       add_dir ? pathdir : NULL, PARSEFS_NONE);
                       *dptr = dp;
 
                       for (d = dp; d != NULL; d = d->next)
@@ -705,6 +725,7 @@ pattern_search (struct file *file, int archive,
 
                   memset (pat, '\0', sizeof (struct patdeps));
                   pat->ignore_mtime = d->ignore_mtime;
+                  pat->ignore_automatic_vars = d->ignore_automatic_vars;
 
                   DBS (DB_IMPLICIT,
                        (is_rule
@@ -895,6 +916,7 @@ pattern_search (struct file *file, int archive,
 
       dep = alloc_dep ();
       dep->ignore_mtime = pat->ignore_mtime;
+      dep->ignore_automatic_vars = pat->ignore_automatic_vars;
       s = strcache_add (pat->name);
       if (recursions)
         dep->name = s;
@@ -931,17 +953,13 @@ pattern_search (struct file *file, int archive,
     }
   else
     {
-      size_t dirlen = (lastslash + 1) - filename;
-      char *sp;
-
       /* We want to prepend the directory from
          the original FILENAME onto the stem.  */
-      fullstemlen = dirlen + stemlen;
-      sp = alloca (fullstemlen + 1);
-      memcpy (sp, filename, dirlen);
-      memcpy (sp + dirlen, stem, stemlen);
-      sp[fullstemlen] = '\0';
-      file->stem = strcache_add (sp);
+      fullstemlen = pathlen + stemlen;
+      memcpy (stem_str, filename, pathlen);
+      memcpy (stem_str + pathlen, stem, stemlen);
+      stem_str[fullstemlen] = '\0';
+      file->stem = strcache_add (stem_str);
     }
 
   file->cmds = rule->cmds;

src/job.c

@@ -1,5 +1,5 @@
 /* Job execution and handling for GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the
@@ -2008,7 +2008,18 @@ load_too_high (void)
 #else
   static double last_sec;
   static time_t last_now;
-  static int proc_fd = -2;
+
+  /* This is disabled by default for now, because it will behave badly if the
+     user gives a value > the number of cores; in that situation the load will
+     never be exceeded, this function always returns false, and we'll start
+     all the jobs.  Also, it's not quite right to limit jobs to the number of
+     cores not busy since a job takes some time to start etc.  Maybe that's
+     OK, I'm not sure exactly how to handle that, but for sure we need to
+     clamp this value at the number of cores before this can be enabled.
+   */
+#define PROC_FD_INIT -1
+  static int proc_fd = PROC_FD_INIT;
+
   double load, guess;
   time_t now;
 

src/job.h

@@ -1,5 +1,5 @@
 /* Definitions for managing subprocesses in GNU Make.
-Copyright (C) 1992-2019 Free Software Foundation, Inc.
+Copyright (C) 1992-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/load.c

@@ -1,5 +1,5 @@
 /* Loading dynamic objects for GNU Make.
-Copyright (C) 2012-2019 Free Software Foundation, Inc.
+Copyright (C) 2012-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/loadapi.c

@@ -1,5 +1,5 @@
 /* API for GNU Make dynamic objects.
-Copyright (C) 2013-2019 Free Software Foundation, Inc.
+Copyright (C) 2013-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/main.c

@@ -1,5 +1,5 @@
 /* Argument parsing and main program of GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the
@@ -1313,7 +1313,7 @@ main (int argc, char **argv, char **envp)
   {
     const char *features = "target-specific order-only second-expansion"
                            " else-if shortest-stem undefine oneshell nocomment"
-                           " grouped-target"
+                           " grouped-target extra-prereqs"
 #ifndef NO_ARCHIVES
                            " archives"
 #endif
@@ -2134,9 +2134,9 @@ main (int argc, char **argv, char **envp)
 
   install_default_implicit_rules ();
 
-  /* Compute implicit rule limits.  */
+  /* Compute implicit rule limits and do magic for pattern rules.  */
 
-  count_implicit_rule_limits ();
+  snap_implicit_rules ();
 
   /* Construct the listings of directories in VPATH lists.  */
 
@@ -3370,7 +3370,7 @@ print_version (void)
      year, and none of the rest of it should be translated (including the
      word "Copyright"), so it hardly seems worth it.  */
 
-  printf ("%sCopyright (C) 1988-2019 Free Software Foundation, Inc.\n",
+  printf ("%sCopyright (C) 1988-2020 Free Software Foundation, Inc.\n",
           precede);
 
   printf (_("%sLicense GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>\n\

src/makeint.h

@@ -1,5 +1,5 @@
 /* Miscellaneous global declarations and portability cruft for GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the
@@ -528,8 +528,12 @@ void print_spaces (unsigned int);
 char *find_percent (char *);
 const char *find_percent_cached (const char **);
 FILE *get_tmpfile (char **, const char *);
-ssize_t writebuf (int, const void*, size_t);
-ssize_t readbuf (int, void*, size_t);
+ssize_t writebuf (int, const void *, size_t);
+ssize_t readbuf (int, void *, size_t);
+
+#ifndef HAVE_MEMRCHR
+void *memrchr(const void *, int, size_t);
+#endif
 
 #ifndef NO_ARCHIVES
 int ar_name (const char *);

src/misc.c

@@ -1,5 +1,5 @@
 /* Miscellaneous generic support functions for GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the
@@ -24,6 +24,7 @@ this program.  If not, see <http://www.gnu.org/licenses/>.  */
 #include <stdarg.h>
 
 #ifdef WINDOWS32
+# include <windows.h>
 # include <io.h>
 #endif
 
@@ -260,6 +261,30 @@ xstrndup (const char *str, size_t length)
 
   return result;
 }
+
+#ifndef HAVE_MEMRCHR
+void *
+memrchr(const void* str, int ch, size_t len)
+{
+  const char* sp = str;
+  const char* cp = sp;
+
+  if (len == 0)
+    return NULL;
+
+  cp += len - 1;
+
+  while (cp[0] != ch)
+    {
+      if (cp == sp)
+        return NULL;
+      --cp;
+    }
+
+  return (void*)cp;
+}
+#endif
+
 
 
 /* Limited INDEX:
@@ -407,7 +432,8 @@ free_ns_chain (struct nameseq *ns)
 
 #ifdef MAKE_MAINTAINER_MODE
 
-void spin(const char* type)
+void
+spin (const char* type)
 {
   char filenm[256];
   struct stat dummy;
@@ -418,7 +444,11 @@ void spin(const char* type)
     {
       fprintf (stderr, "SPIN on %s\n", filenm);
       do
+#ifdef WINDOWS32
+        Sleep (1000);
+#else
         sleep (1);
+#endif
       while (stat (filenm, &dummy) == 0);
     }
 }

src/os.h

@@ -1,5 +1,5 @@
 /* Declarations for operating system interfaces for GNU Make.
-Copyright (C) 2016-2019 Free Software Foundation, Inc.
+Copyright (C) 2016-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/output.c

@@ -1,5 +1,5 @@
 /* Output to stdout / stderr for GNU make
-Copyright (C) 2013-2019 Free Software Foundation, Inc.
+Copyright (C) 2013-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/output.h

@@ -1,5 +1,5 @@
 /* Output to stdout / stderr for GNU make
-Copyright (C) 2013-2019 Free Software Foundation, Inc.
+Copyright (C) 2013-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/posixos.c

@@ -1,5 +1,5 @@
 /* POSIX-based operating system interface for GNU Make.
-Copyright (C) 2016-2019 Free Software Foundation, Inc.
+Copyright (C) 2016-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/read.c

@@ -1,5 +1,5 @@
 /* Reading and parsing of makefiles for GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the
@@ -3138,7 +3138,10 @@ parse_file_seq (char **stringp, size_t size, int stopmap,
   char *p;
   glob_t gl;
   char *tp;
-  int findmap = stopmap|MAP_VMSCOMMA|MAP_BLANK|MAP_NUL;
+  int findmap = stopmap|MAP_VMSCOMMA|MAP_NUL;
+
+  if (NONE_SET (flags, PARSEFS_ONEWORD))
+    findmap |= MAP_BLANK;
 
   /* Always stop on NUL.  */
   stopmap |= MAP_NUL;

src/remake.c

@@ -1,5 +1,5 @@
 /* Basic dependency engine for GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/remote-cstms.c

@@ -3,7 +3,7 @@
    Please do not send bug reports or questions about it to
    the Make maintainers.
 
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/remote-stub.c

@@ -1,5 +1,5 @@
 /* Template for the remote job exportation interface to GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/rule.c

@@ -1,5 +1,5 @@
 /* Pattern and suffix rule internals for GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the
@@ -60,36 +60,43 @@ struct file *suffix_file;
 
 static size_t maxsuffix;
 
-/* Compute the maximum dependency length and maximum number of
-   dependencies of all implicit rules.  Also sets the subdir
-   flag for a rule when appropriate, possibly removing the rule
-   completely when appropriate.  */
+/* Compute the maximum dependency length and maximum number of dependencies of
+   all implicit rules.  Also sets the subdir flag for a rule when appropriate,
+   possibly removing the rule completely when appropriate.
+
+   Add any global EXTRA_PREREQS here as well.  */
 
 void
-count_implicit_rule_limits (void)
+snap_implicit_rules (void)
 {
-  char *name;
-  size_t namelen;
-  struct rule *rule;
+  char *name = NULL;
+  size_t namelen = 0;
+  struct dep *prereqs = expand_extra_prereqs (lookup_variable (STRING_SIZE_TUPLE(".EXTRA_PREREQS")));
+  unsigned int pre_deps = 0;
 
-  num_pattern_rules = max_pattern_targets = max_pattern_deps = 0;
   max_pattern_dep_length = 0;
 
-  name = 0;
-  namelen = 0;
-  rule = pattern_rules;
-  while (rule != 0)
+  for (struct dep *d = prereqs; d; d = d->next)
     {
-      unsigned int ndeps = 0;
-      struct dep *dep;
-      struct rule *next = rule->next;
+      size_t l = strlen (dep_name (d));
+      if (l > max_pattern_dep_length)
+        max_pattern_dep_length = l;
+      ++pre_deps;
+    }
+
+  num_pattern_rules = max_pattern_targets = max_pattern_deps = 0;
+
+  for (struct rule *rule = pattern_rules; rule; rule = rule->next)
+    {
+      unsigned int ndeps = pre_deps;
+      struct dep *lastdep = NULL;
 
       ++num_pattern_rules;
 
       if (rule->num > max_pattern_targets)
         max_pattern_targets = rule->num;
 
-      for (dep = rule->deps; dep != 0; dep = dep->next)
+      for (struct dep *dep = rule->deps; dep != 0; dep = dep->next)
         {
           const char *dname = dep_name (dep);
           size_t len = strlen (dname);
@@ -99,17 +106,20 @@ count_implicit_rule_limits (void)
           const char *p2;
           if (p == 0)
             p = strrchr (dname, ':');
-          p2 = p != 0 ? strchr (dname, '%') : 0;
+          p2 = p ? strchr (p, '%') : 0;
 #else
           const char *p = strrchr (dname, '/');
-          const char *p2 = p != 0 ? strchr (dname, '%') : 0;
+          const char *p2 = p ? strchr (p, '%') : 0;
 #endif
           ndeps++;
 
           if (len > max_pattern_dep_length)
             max_pattern_dep_length = len;
 
-          if (p != 0 && p2 > p)
+          if (!dep->next)
+            lastdep = dep;
+
+          if (p2)
             {
               /* There is a slash before the % in the dep name.
                  Extract the directory name.  */
@@ -134,13 +144,20 @@ count_implicit_rule_limits (void)
             dep->changed = 0;
         }
 
+      if (prereqs)
+        {
+          if (lastdep)
+            lastdep->next = copy_dep_chain (prereqs);
+          else
+            rule->deps = copy_dep_chain (prereqs);
+        }
+
       if (ndeps > max_pattern_deps)
         max_pattern_deps = ndeps;
-
-      rule = next;
     }
 
   free (name);
+  free_dep_chain (prereqs);
 }
 
 /* Create a pattern rule from a suffix rule.

src/rule.h

@@ -1,5 +1,5 @@
 /* Definitions for using pattern rules in GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the
@@ -48,7 +48,7 @@ extern size_t max_pattern_dep_length;
 extern struct file *suffix_file;
 
 
-void count_implicit_rule_limits (void);
+void snap_implicit_rules (void);
 void convert_to_pattern (void);
 void install_pattern_rule (struct pspec *p, int terminal);
 void create_pattern_rule (const char **targets, const char **target_percents,

src/signame.c

@@ -1,5 +1,5 @@
 /* Convert between signal names and numbers.
-Copyright (C) 1990-2019 Free Software Foundation, Inc.
+Copyright (C) 1990-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/strcache.c

@@ -1,5 +1,5 @@
 /* Constant string caching for GNU Make.
-Copyright (C) 2006-2019 Free Software Foundation, Inc.
+Copyright (C) 2006-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/variable.c

@@ -1,5 +1,5 @@
 /* Internals of variables for GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/variable.h

@@ -1,5 +1,5 @@
 /* Definitions for using variables in GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/version.c

@@ -1,5 +1,5 @@
 /* Record version and build host architecture for GNU make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/vms_exit.c

@@ -7,7 +7,7 @@
  * Author: John E. Malmberg
  */
 
-/* Copyright (C) 2014-2019 Free Software Foundation, Inc.
+/* Copyright (C) 2014-2020 Free Software Foundation, Inc.
 
 GNU Make is free software; you can redistribute it and/or modify it under the
 terms of the GNU General Public License as published by the Free Software

src/vms_export_symbol.c

@@ -4,7 +4,7 @@
  * DCL symbols.
  */
 
-/* Copyright (C) 2014-2019 Free Software Foundation, Inc.
+/* Copyright (C) 2014-2020 Free Software Foundation, Inc.
 
 GNU Make is free software; you can redistribute it and/or modify it under the
 terms of the GNU General Public License as published by the Free Software

src/vms_progname.c

@@ -36,7 +36,7 @@
  *
  */
 
-/* Copyright (C) 2014-2019 Free Software Foundation, Inc.
+/* Copyright (C) 2014-2020 Free Software Foundation, Inc.
 
 GNU Make is free software; you can redistribute it and/or modify it under the
 terms of the GNU General Public License as published by the Free Software

src/vmsdir.h

@@ -1,5 +1,5 @@
 /* dirent.h for vms
-Copyright (C) 1996-2019 Free Software Foundation, Inc.
+Copyright (C) 1996-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/vmsfunctions.c

@@ -1,5 +1,5 @@
 /* VMS functions
-Copyright (C) 1996-2019 Free Software Foundation, Inc.
+Copyright (C) 1996-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/vmsify.c

@@ -1,5 +1,5 @@
 /* vmsify.c -- Module for vms <-> unix file name conversion
-Copyright (C) 1996-2019 Free Software Foundation, Inc.
+Copyright (C) 1996-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/vmsjobs.c

@@ -1,7 +1,7 @@
 /* --------------- Moved here from job.c ---------------
    This file must be #included in job.c, as it accesses static functions.
 
-Copyright (C) 1996-2019 Free Software Foundation, Inc.
+Copyright (C) 1996-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/vpath.c

@@ -1,5 +1,5 @@
 /* Implementation of pattern-matching file search paths for GNU Make.
-Copyright (C) 1988-2019 Free Software Foundation, Inc.
+Copyright (C) 1988-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/w32/compat/dirent.c

@@ -1,5 +1,5 @@
 /* Directory entry code for Window platforms.
-Copyright (C) 1996-2019 Free Software Foundation, Inc.
+Copyright (C) 1996-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/w32/compat/posixfcn.c

@@ -1,6 +1,6 @@
 /* Replacements for Posix functions and Posix functionality for MS-Windows.
 
-Copyright (C) 2013-2019 Free Software Foundation, Inc.
+Copyright (C) 2013-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/w32/include/dirent.h

@@ -1,5 +1,5 @@
 /* Windows version of dirent.h
-Copyright (C) 1996-2019 Free Software Foundation, Inc.
+Copyright (C) 1996-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/w32/include/dlfcn.h

@@ -1,5 +1,5 @@
 /* dlfcn.h replacement for MS-Windows build.
-Copyright (C) 2013-2019 Free Software Foundation, Inc.
+Copyright (C) 2013-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/w32/include/pathstuff.h

@@ -1,5 +1,5 @@
 /* Definitions for Windows path manipulation.
-Copyright (C) 1996-2019 Free Software Foundation, Inc.
+Copyright (C) 1996-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/w32/include/sub_proc.h

@@ -1,5 +1,5 @@
 /* Definitions for Windows process invocation.
-Copyright (C) 1996-2019 Free Software Foundation, Inc.
+Copyright (C) 1996-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/w32/include/w32err.h

@@ -1,5 +1,5 @@
 /* Definitions for Windows error handling.
-Copyright (C) 1996-2019 Free Software Foundation, Inc.
+Copyright (C) 1996-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/w32/pathstuff.c

@@ -1,5 +1,5 @@
 /* Path conversion for Windows pathnames.
-Copyright (C) 1996-2019 Free Software Foundation, Inc.
+Copyright (C) 1996-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/w32/subproc/misc.c

@@ -1,5 +1,5 @@
 /* Process handling for Windows
-Copyright (C) 1996-2019 Free Software Foundation, Inc.
+Copyright (C) 1996-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/w32/subproc/proc.h

@@ -1,5 +1,5 @@
 /* Definitions for Windows
-Copyright (C) 1996-2019 Free Software Foundation, Inc.
+Copyright (C) 1996-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the

src/w32/subproc/sub_proc.c

@@ -1,5 +1,5 @@
 /* Process handling for Windows.
-Copyright (C) 1996-2019 Free Software Foundation, Inc.
+Copyright (C) 1996-2020 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify it under the