autoreconf -f -i

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1252 4c0a9323-5329-0410-9bdc-e9ce6186880e
2024-12-22 15:15:29 +00:00 · 2013-12-10 17:53:50 +00:00 · 2013-12-10 17:53:50 +00:00 · b76bb512a0
parent 07bb2311f8
commit b76bb512a0
6 changed files with 868 additions and 670 deletions
--- a/210
+++ b/210
@ -1,19 +1,25 @@
 Installation Instructions
 *************************
-Copyright (C) 1994, 1995, 1996, 1999, 2000, 2001, 2002, 2004, 2005,
+Copyright (C) 1994-1996, 1999-2002, 2004-2013 Free Software Foundation,
-2006 Free Software Foundation, Inc.
+Inc.
-This file is free documentation; the Free Software Foundation gives
+   Copying and distribution of this file, with or without modification,
-unlimited permission to copy, distribute and modify it.
+are permitted in any medium without royalty provided the copyright
 notice and this notice are preserved.  This file is offered as-is,
 without warranty of any kind.
 Basic Installation
 ==================
-Briefly, the shell commands `./configure; make; make install' should
+   Briefly, the shell commands `./configure; make; make install' should
 configure, build, and install this package.  The following
 more-detailed instructions are generic; see the `README' file for
-instructions specific to this package.
+instructions specific to this package.  Some packages provide this
 `INSTALL' file but do not implement all of the features documented
 below.  The lack of an optional feature in a given package is not
 necessarily a bug.  More recommendations for GNU packages can be found
 in *note Makefile Conventions: (standards)Makefile Conventions.
   The `configure' shell script attempts to guess correct values for
 various system-dependent variables used during compilation.  It uses
@ -42,7 +48,7 @@ may remove or edit it.
 you want to change it or regenerate `configure' using a newer version
 of `autoconf'.
-The simplest way to compile this package is:
+   The simplest way to compile this package is:
  1. `cd' to the directory containing the package's source code and type
     `./configure' to configure the package for your system.
@ -53,12 +59,22 @@ The simplest way to compile this package is:
  2. Type `make' to compile the package.
  3. Optionally, type `make check' to run any self-tests that come with
-     the package.
+     the package, generally using the just-built uninstalled binaries.
  4. Type `make install' to install the programs and any data files and
-     documentation.
+     documentation.  When installing into a prefix owned by root, it is
     recommended that the package be configured and built as a regular
     user, and only the `make install' phase executed with root
     privileges.
-  5. You can remove the program binaries and object files from the
+  5. Optionally, type `make installcheck' to repeat any self-tests, but
     this time using the binaries in their final installed location.
     This target does not install anything.  Running this target as a
     regular user, particularly if the prior `make install' required
     root privileges, verifies that the installation completed
     correctly.
  6. You can remove the program binaries and object files from the
     source code directory by typing `make clean'.  To also remove the
     files that `configure' created (so you can compile the package for
     a different kind of computer), type `make distclean'.  There is
@ -67,12 +83,22 @@ The simplest way to compile this package is:
     all sorts of other programs in order to regenerate files that came
     with the distribution.
  7. Often, you can also type `make uninstall' to remove the installed
     files again.  In practice, not all packages have tested that
     uninstallation works correctly, even though it is required by the
     GNU Coding Standards.
  8. Some packages, particularly those that use Automake, provide `make
     distcheck', which can by used by developers to test that all other
     targets like `make install' and `make uninstall' work correctly.
     This target is generally not run by end users.
 Compilers and Options
 =====================
-Some systems require unusual options for compilation or linking that the
+   Some systems require unusual options for compilation or linking that
-`configure' script does not know about.  Run `./configure --help' for
+the `configure' script does not know about.  Run `./configure --help'
-details on some of the pertinent environment variables.
+for details on some of the pertinent environment variables.
   You can give `configure' initial values for configuration parameters
 by setting variables in the command line or in the environment.  Here
@ -85,25 +111,41 @@ is an example:
 Compiling For Multiple Architectures
 ====================================
-You can compile the package for more than one kind of computer at the
+   You can compile the package for more than one kind of computer at the
 same time, by placing the object files for each architecture in their
 own directory.  To do this, you can use GNU `make'.  `cd' to the
 directory where you want the object files and executables to go and run
 the `configure' script.  `configure' automatically checks for the
-source code in the directory that `configure' is in and in `..'.
+source code in the directory that `configure' is in and in `..'.  This
 is known as a "VPATH" build.
   With a non-GNU `make', it is safer to compile the package for one
 architecture at a time in the source code directory.  After you have
 installed the package for one architecture, use `make distclean' before
 reconfiguring for another architecture.
   On MacOS X 10.5 and later systems, you can create libraries and
 executables that work on multiple system types--known as "fat" or
 "universal" binaries--by specifying multiple `-arch' options to the
 compiler but only a single `-arch' option to the preprocessor.  Like
 this:
     ./configure CC="gcc -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
                 CXX="g++ -arch i386 -arch x86_64 -arch ppc -arch ppc64" \
                 CPP="gcc -E" CXXCPP="g++ -E"
   This is not guaranteed to produce working output in all cases, you
 may have to build one architecture at a time and combine the results
 using the `lipo' tool if you have problems.
 Installation Names
 ==================
-By default, `make install' installs the package's commands under
+   By default, `make install' installs the package's commands under
 `/usr/local/bin', include files under `/usr/local/include', etc.  You
 can specify an installation prefix other than `/usr/local' by giving
-`configure' the option `--prefix=PREFIX'.
+`configure' the option `--prefix=PREFIX', where PREFIX must be an
 absolute file name.
   You can specify separate installation prefixes for
 architecture-specific files and architecture-independent files.  If you
@ -114,16 +156,47 @@ Documentation and other data files still use the regular prefix.
   In addition, if you use an unusual directory layout you can give
 options like `--bindir=DIR' to specify different values for particular
 kinds of files.  Run `configure --help' for a list of the directories
-you can set and what kinds of files go in them.
+you can set and what kinds of files go in them.  In general, the
 default for these options is expressed in terms of `${prefix}', so that
 specifying just `--prefix' will affect all of the other directory
 specifications that were not explicitly provided.
   The most portable way to affect installation locations is to pass the
 correct locations to `configure'; however, many packages provide one or
 both of the following shortcuts of passing variable assignments to the
 `make install' command line to change installation locations without
 having to reconfigure or recompile.
   The first method involves providing an override variable for each
 affected directory.  For example, `make install
 prefix=/alternate/directory' will choose an alternate location for all
 directory configuration variables that were expressed in terms of
 `${prefix}'.  Any directories that were specified during `configure',
 but not in terms of `${prefix}', must each be overridden at install
 time for the entire installation to be relocated.  The approach of
 makefile variable overrides for each directory variable is required by
 the GNU Coding Standards, and ideally causes no recompilation.
 However, some platforms have known limitations with the semantics of
 shared libraries that end up requiring recompilation when using this
 method, particularly noticeable in packages that use GNU Libtool.
   The second method involves providing the `DESTDIR' variable.  For
 example, `make install DESTDIR=/alternate/directory' will prepend
 `/alternate/directory' before all installation names.  The approach of
 `DESTDIR' overrides is not required by the GNU Coding Standards, and
 does not work on platforms that have drive letters.  On the other hand,
 it does better at avoiding recompilation issues, and works well even
 when some directory options were not specified in terms of `${prefix}'
 at `configure' time.
 Optional Features
 =================
   If the package supports it, you can cause programs to be installed
 with an extra prefix or suffix on their names by giving `configure' the
 option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.
-Optional Features
+   Some packages pay attention to `--enable-FEATURE' options to
 =================
 Some packages pay attention to `--enable-FEATURE' options to
 `configure', where FEATURE indicates an optional part of the package.
 They may also pay attention to `--with-PACKAGE' options, where PACKAGE
 is something like `gnu-as' or `x' (for the X Window System).  The
@ -135,14 +208,58 @@ find the X include and library files automatically, but if it doesn't,
 you can use the `configure' options `--x-includes=DIR' and
 `--x-libraries=DIR' to specify their locations.
   Some packages offer the ability to configure how verbose the
 execution of `make' will be.  For these packages, running `./configure
 --enable-silent-rules' sets the default to minimal output, which can be
 overridden with `make V=1'; while running `./configure
 --disable-silent-rules' sets the default to verbose, which can be
 overridden with `make V=0'.
 Particular systems
 ==================
   On HP-UX, the default C compiler is not ANSI C compatible.  If GNU
 CC is not installed, it is recommended to use the following options in
 order to use an ANSI C compiler:
     ./configure CC="cc -Ae -D_XOPEN_SOURCE=500"
 and if that doesn't work, install pre-built binaries of GCC for HP-UX.
   HP-UX `make' updates targets which have the same time stamps as
 their prerequisites, which makes it generally unusable when shipped
 generated files such as `configure' are involved.  Use GNU `make'
 instead.
   On OSF/1 a.k.a. Tru64, some versions of the default C compiler cannot
 parse its `<wchar.h>' header file.  The option `-nodtk' can be used as
 a workaround.  If GNU CC is not installed, it is therefore recommended
 to try
     ./configure CC="cc"
 and if that doesn't work, try
     ./configure CC="cc -nodtk"
   On Solaris, don't put `/usr/ucb' early in your `PATH'.  This
 directory contains several dysfunctional programs; working variants of
 these programs are available in `/usr/bin'.  So, if you need `/usr/ucb'
 in your `PATH', put it _after_ `/usr/bin'.
   On Haiku, software installed for all users goes in `/boot/common',
 not `/usr/local'.  It is recommended to use the following options:
     ./configure --prefix=/boot/common
 Specifying the System Type
 ==========================
-There may be some features `configure' cannot figure out automatically,
+   There may be some features `configure' cannot figure out
-but needs to determine by the type of machine the package will run on.
+automatically, but needs to determine by the type of machine the package
-Usually, assuming the package is built to be run on the _same_
+will run on.  Usually, assuming the package is built to be run on the
-architectures, `configure' can figure that out, but if it prints a
+_same_ architectures, `configure' can figure that out, but if it prints
-message saying it cannot guess the machine type, give it the
+a message saying it cannot guess the machine type, give it the
 `--build=TYPE' option.  TYPE can either be a short name for the system
 type, such as `sun4', or a canonical name which has the form:
@ -150,7 +267,8 @@ type, such as `sun4', or a canonical name which has the form:
 where SYSTEM can have one of these forms:
-     OS KERNEL-OS
+     OS
     KERNEL-OS
   See the file `config.sub' for the possible values of each field.  If
 `config.sub' isn't included in this package, then this package doesn't
@ -168,9 +286,9 @@ eventually be run) with `--host=TYPE'.
 Sharing Defaults
 ================
-If you want to set default values for `configure' scripts to share, you
+   If you want to set default values for `configure' scripts to share,
-can create a site shell script called `config.site' that gives default
+you can create a site shell script called `config.site' that gives
-values for variables like `CC', `cache_file', and `prefix'.
+default values for variables like `CC', `cache_file', and `prefix'.
 `configure' looks for `PREFIX/share/config.site' if it exists, then
 `PREFIX/etc/config.site' if it exists.  Or, you can set the
 `CONFIG_SITE' environment variable to the location of the site script.
@ -179,7 +297,7 @@ A warning: not all `configure' scripts look for a site script.
 Defining Variables
 ==================
-Variables not defined in a site shell script can be set in the
+   Variables not defined in a site shell script can be set in the
 environment passed to `configure'.  However, some packages may run
 configure again during the build, and the customized values of these
 variables may be lost.  In order to avoid this problem, you should set
@ -191,18 +309,27 @@ causes the specified `gcc' to be used as the C compiler (unless it is
 overridden in the site shell script).
 Unfortunately, this technique does not work for `CONFIG_SHELL' due to
-an Autoconf bug.  Until the bug is fixed you can use this workaround:
+an Autoconf limitation.  Until the limitation is lifted, you can use
 this workaround:
-     CONFIG_SHELL=/bin/bash /bin/bash ./configure CONFIG_SHELL=/bin/bash
+     CONFIG_SHELL=/bin/bash ./configure CONFIG_SHELL=/bin/bash
 `configure' Invocation
 ======================
-`configure' recognizes the following options to control how it operates.
+   `configure' recognizes the following options to control how it
 operates.
 `--help'
 `-h'
-     Print a summary of the options to `configure', and exit.
+     Print a summary of all of the options to `configure', and exit.
 `--help=short'
 `--help=recursive'
     Print a summary of the options unique to this package's
     `configure', and exit.  The `short' variant lists options used
     only in the top level, while the `recursive' variant lists options
     also present in any nested packages.
 `--version'
 `-V'
@ -229,6 +356,15 @@ an Autoconf bug.  Until the bug is fixed you can use this workaround:
     Look for the package's source code in directory DIR.  Usually
     `configure' can determine that directory automatically.
 `--prefix=DIR'
     Use DIR as the installation prefix.  *note Installation Names::
     for more details, including other options available for fine-tuning
     the installation locations.
 `--no-create'
 `-n'
     Run the configure checks, but stop before creating any output
     files.
 `configure' also accepts some other, not widely useful, options.  Run
 `configure --help' for more details.
--- a/autotools/config.guess
+++ b/autotools/config.guess
@ -4,7 +4,7 @@
 #   2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
 #   2011, 2012 Free Software Foundation, Inc.
-timestamp='2012-06-17'
+timestamp='2012-02-10'
 # This file is free software; you can redistribute it and/or modify it
 # under the terms of the GNU General Public License as published by
@ -200,10 +200,6 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
 	# CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM is used.
 	echo "${machine}-${os}${release}"
 	exit ;;
    *:Bitrig:*:*)
 	UNAME_MACHINE_ARCH=`arch | sed 's/Bitrig.//'`
 	echo ${UNAME_MACHINE_ARCH}-unknown-bitrig${UNAME_RELEASE}
 	exit ;;
    *:OpenBSD:*:*)
 	UNAME_MACHINE_ARCH=`arch | sed 's/OpenBSD.//'`
 	echo ${UNAME_MACHINE_ARCH}-unknown-openbsd${UNAME_RELEASE}
@ -1260,7 +1256,7 @@ EOF
    NEO-?:NONSTOP_KERNEL:*:*)
 	echo neo-tandem-nsk${UNAME_RELEASE}
 	exit ;;
-    NSE-*:NONSTOP_KERNEL:*:*)
+    NSE-?:NONSTOP_KERNEL:*:*)
 	echo nse-tandem-nsk${UNAME_RELEASE}
 	exit ;;
    NSR-?:NONSTOP_KERNEL:*:*)
--- a/autotools/config.sub
+++ b/autotools/config.sub
@ -4,7 +4,7 @@
 #   2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
 #   2011, 2012 Free Software Foundation, Inc.
-timestamp='2012-06-17'
+timestamp='2012-02-10'
 # This file is (in principle) common to ALL GNU software.
 # The presence of a machine in this file suggests that SOME GNU software
@ -225,12 +225,6 @@ case $os in
 	-isc*)
 		basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
 		;;
 	-lynx*178)
 		os=-lynxos178
 		;;
 	-lynx*5)
 		os=-lynxos5
 		;;
 	-lynx*)
 		os=-lynxos
 		;;
@ -1352,7 +1346,7 @@ case $os in
 	      | -nindy* | -vxsim* | -vxworks* | -ebmon* | -hms* | -mvs* \
 	      | -clix* | -riscos* | -uniplus* | -iris* | -rtu* | -xenix* \
 	      | -hiux* | -386bsd* | -knetbsd* | -mirbsd* | -netbsd* \
-	      | -bitrig* | -openbsd* | -solidbsd* \
+	      | -openbsd* | -solidbsd* \
 	      | -ekkobsd* | -kfreebsd* | -freebsd* | -riscix* | -lynxos* \
 	      | -bosx* | -nextstep* | -cxux* | -aout* | -elf* | -oabi* \
 	      | -ptx* | -coff* | -ecoff* | -winnt* | -domain* | -vsta* \
@ -1543,9 +1537,6 @@ case $basic_machine in
 	c4x-* | tic4x-*)
 		os=-coff
 		;;
 	hexagon-*)
 		os=-elf
 		;;
 	tic54x-*)
 		os=-coff
 		;;
--- a/autotools/depcomp
+++ b/autotools/depcomp
@ -1,10 +1,9 @@
 #! /bin/sh
 # depcomp - compile a program generating dependencies as side-effects
-scriptversion=2006-10-15.18
+scriptversion=2013-05-30.07; # UTC
-# Copyright (C) 1999, 2000, 2003, 2004, 2005, 2006 Free Software
+# Copyright (C) 1999-2013 Free Software Foundation, Inc.
 # Foundation, Inc.
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@ -17,9 +16,7 @@ scriptversion=2006-10-15.18
 # GNU General Public License for more details.
 # You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 # 02110-1301, USA.
 # As a special exception to the GNU General Public License, if you
 # distribute this file as part of a program that contains a
@ -30,9 +27,9 @@ scriptversion=2006-10-15.18
 case $1 in
  '')
-     echo "$0: No command.  Try \`$0 --help' for more information." 1>&2
+    echo "$0: No command.  Try '$0 --help' for more information." 1>&2
-     exit 1;
+    exit 1;
-     ;;
+    ;;
  -h | --h*)
    cat <<\EOF
 Usage: depcomp [--help] [--version] PROGRAM [ARGS]
@ -42,11 +39,11 @@ as side-effects.
 Environment variables:
  depmode     Dependency tracking mode.
-  source      Source file read by `PROGRAMS ARGS'.
+  source      Source file read by 'PROGRAMS ARGS'.
-  object      Object file output by `PROGRAMS ARGS'.
+  object      Object file output by 'PROGRAMS ARGS'.
  DEPDIR      directory where to store dependencies.
  depfile     Dependency file to output.
-  tmpdepfile  Temporary file to use when outputing dependencies.
+  tmpdepfile  Temporary file to use when outputting dependencies.
  libtool     Whether libtool is used (yes/no).
 Report bugs to <bug-automake@gnu.org>.
@ -59,6 +56,66 @@ EOF
    ;;
 esac
 # Get the directory component of the given path, and save it in the
 # global variables '$dir'.  Note that this directory component will
 # be either empty or ending with a '/' character.  This is deliberate.
 set_dir_from ()
 {
  case $1 in
    */*) dir=`echo "$1" | sed -e 's|/[^/]*$|/|'`;;
      *) dir=;;
  esac
 }
 # Get the suffix-stripped basename of the given path, and save it the
 # global variable '$base'.
 set_base_from ()
 {
  base=`echo "$1" | sed -e 's|^.*/||' -e 's/\.[^.]*$//'`
 }
 # If no dependency file was actually created by the compiler invocation,
 # we still have to create a dummy depfile, to avoid errors with the
 # Makefile "include basename.Plo" scheme.
 make_dummy_depfile ()
 {
  echo "#dummy" > "$depfile"
 }
 # Factor out some common post-processing of the generated depfile.
 # Requires the auxiliary global variable '$tmpdepfile' to be set.
 aix_post_process_depfile ()
 {
  # If the compiler actually managed to produce a dependency file,
  # post-process it.
  if test -f "$tmpdepfile"; then
    # Each line is of the form 'foo.o: dependency.h'.
    # Do two passes, one to just change these to
    #   $object: dependency.h
    # and one to simply output
    #   dependency.h:
    # which is needed to avoid the deleted-header problem.
    { sed -e "s,^.*\.[$lower]*:,$object:," < "$tmpdepfile"
      sed -e "s,^.*\.[$lower]*:[$tab ]*,," -e 's,$,:,' < "$tmpdepfile"
    } > "$depfile"
    rm -f "$tmpdepfile"
  else
    make_dummy_depfile
  fi
 }
 # A tabulation character.
 tab='	'
 # A newline character.
 nl='
 '
 # Character ranges might be problematic outside the C locale.
 # These definitions help.
 upper=ABCDEFGHIJKLMNOPQRSTUVWXYZ
 lower=abcdefghijklmnopqrstuvwxyz
 digits=0123456789
 alpha=${upper}${lower}
 if test -z "$depmode" || test -z "$source" || test -z "$object"; then
  echo "depcomp: Variables source, object and depmode must be set" 1>&2
  exit 1
@ -71,6 +128,9 @@ tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`}
 rm -f "$tmpdepfile"
 # Avoid interferences from the environment.
 gccflag= dashmflag=
 # Some modes work just like other modes, but use different flags.  We
 # parameterize here, but still list the modes in the big case below,
 # to make depend.m4 easier to write.  Note that we *cannot* use a case
@ -82,9 +142,32 @@ if test "$depmode" = hp; then
 fi
 if test "$depmode" = dashXmstdout; then
-   # This is just like dashmstdout with a different argument.
+  # This is just like dashmstdout with a different argument.
-   dashmflag=-xM
+  dashmflag=-xM
-   depmode=dashmstdout
+  depmode=dashmstdout
 fi
 cygpath_u="cygpath -u -f -"
 if test "$depmode" = msvcmsys; then
  # This is just like msvisualcpp but w/o cygpath translation.
  # Just convert the backslash-escaped backslashes to single forward
  # slashes to satisfy depend.m4
  cygpath_u='sed s,\\\\,/,g'
  depmode=msvisualcpp
 fi
 if test "$depmode" = msvc7msys; then
  # This is just like msvc7 but w/o cygpath translation.
  # Just convert the backslash-escaped backslashes to single forward
  # slashes to satisfy depend.m4
  cygpath_u='sed s,\\\\,/,g'
  depmode=msvc7
 fi
 if test "$depmode" = xlc; then
  # IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information.
  gccflag=-qmakedep=gcc,-MF
  depmode=gcc
 fi
 case "$depmode" in
@ -107,8 +190,7 @@ gcc3)
  done
  "$@"
  stat=$?
-  if test $stat -eq 0; then :
+  if test $stat -ne 0; then
  else
    rm -f "$tmpdepfile"
    exit $stat
  fi
@ -116,13 +198,17 @@ gcc3)
  ;;
 gcc)
 ## Note that this doesn't just cater to obsosete pre-3.x GCC compilers.
 ## but also to in-use compilers like IMB xlc/xlC and the HP C compiler.
 ## (see the conditional assignment to $gccflag above).
 ## There are various ways to get dependency output from gcc.  Here's
 ## why we pick this rather obscure method:
 ## - Don't want to use -MD because we'd like the dependencies to end
 ##   up in a subdir.  Having to rename by hand is ugly.
 ##   (We might end up doing this anyway to support other compilers.)
 ## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like
-##   -MM, not -M (despite what the docs say).
+##   -MM, not -M (despite what the docs say).  Also, it might not be
 ##   supported by the other compilers which use the 'gcc' depmode.
 ## - Using -M directly means running the compiler twice (even worse
 ##   than renaming).
  if test -z "$gccflag"; then
@ -130,31 +216,31 @@ gcc)
  fi
  "$@" -Wp,"$gccflag$tmpdepfile"
  stat=$?
-  if test $stat -eq 0; then :
+  if test $stat -ne 0; then
  else
    rm -f "$tmpdepfile"
    exit $stat
  fi
  rm -f "$depfile"
  echo "$object : \\" > "$depfile"
-  alpha=ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
+  # The second -e expression handles DOS-style file names with drive
-## The second -e expression handles DOS-style file names with drive letters.
+  # letters.
  sed -e 's/^[^:]*: / /' \
      -e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile"
-## This next piece of magic avoids the `deleted header file' problem.
+## This next piece of magic avoids the "deleted header file" problem.
 ## The problem is that when a header file which appears in a .P file
 ## is deleted, the dependency causes make to die (because there is
 ## typically no way to rebuild the header).  We avoid this by adding
 ## dummy dependencies for each header file.  Too bad gcc doesn't do
 ## this for us directly.
-  tr ' ' '
+## Some versions of gcc put a space before the ':'.  On the theory
 ' < "$tmpdepfile" |
 ## Some versions of gcc put a space before the `:'.  On the theory
 ## that the space means something, we add a space to the output as
-## well.
+## well.  hp depmode also adds that space, but also prefixes the VPATH
 ## to the object.  Take care to not repeat it in the output.
 ## Some versions of the HPUX 10.20 sed can't process this invocation
 ## correctly.  Breaking it into two sed invocations is a workaround.
-    sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile"
+  tr ' ' "$nl" < "$tmpdepfile" \
    | sed -e 's/^\\$//' -e '/^$/d' -e "s|.*$object$||" -e '/:$/d' \
    | sed -e 's/$/ :/' >> "$depfile"
  rm -f "$tmpdepfile"
  ;;
@ -172,8 +258,7 @@ sgi)
    "$@" -MDupdate "$tmpdepfile"
  fi
  stat=$?
-  if test $stat -eq 0; then :
+  if test $stat -ne 0; then
  else
    rm -f "$tmpdepfile"
    exit $stat
  fi
@ -181,99 +266,156 @@ sgi)
  if test -f "$tmpdepfile"; then  # yes, the sourcefile depend on other files
    echo "$object : \\" > "$depfile"
    # Clip off the initial element (the dependent).  Don't try to be
    # clever and replace this with sed code, as IRIX sed won't handle
    # lines with more than a fixed number of characters (4096 in
    # IRIX 6.2 sed, 8192 in IRIX 6.5).  We also remove comment lines;
-    # the IRIX cc adds comments like `#:fec' to the end of the
+    # the IRIX cc adds comments like '#:fec' to the end of the
    # dependency line.
-    tr ' ' '
+    tr ' ' "$nl" < "$tmpdepfile" \
-' < "$tmpdepfile" \
+      | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' \
-    | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' | \
+      | tr "$nl" ' ' >> "$depfile"
-    tr '
+    echo >> "$depfile"
 ' ' ' >> $depfile
    echo >> $depfile
    # The second pass generates a dummy entry for each header file.
-    tr ' ' '
+    tr ' ' "$nl" < "$tmpdepfile" \
-' < "$tmpdepfile" \
+      | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \
-   | sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \
+      >> "$depfile"
   >> $depfile
  else
-    # The sourcefile does not contain any dependencies, so just
+    make_dummy_depfile
    # store a dummy comment line, to avoid errors with the Makefile
    # "include basename.Plo" scheme.
    echo "#dummy" > "$depfile"
  fi
  rm -f "$tmpdepfile"
  ;;
 xlc)
  # This case exists only to let depend.m4 do its work.  It works by
  # looking at the text of this script.  This case will never be run,
  # since it is checked for above.
  exit 1
  ;;
 aix)
  # The C for AIX Compiler uses -M and outputs the dependencies
  # in a .u file.  In older versions, this file always lives in the
-  # current directory.  Also, the AIX compiler puts `$object:' at the
+  # current directory.  Also, the AIX compiler puts '$object:' at the
  # start of each line; $object doesn't have directory information.
  # Version 6 uses the directory in both cases.
-  stripped=`echo "$object" | sed 's/\(.*\)\..*$/\1/'`
+  set_dir_from "$object"
-  tmpdepfile="$stripped.u"
+  set_base_from "$object"
  if test "$libtool" = yes; then
    tmpdepfile1=$dir$base.u
    tmpdepfile2=$base.u
    tmpdepfile3=$dir.libs/$base.u
    "$@" -Wc,-M
  else
    tmpdepfile1=$dir$base.u
    tmpdepfile2=$dir$base.u
    tmpdepfile3=$dir$base.u
    "$@" -M
  fi
  stat=$?
-
+  if test $stat -ne 0; then
-  if test -f "$tmpdepfile"; then :
+    rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
  else
    stripped=`echo "$stripped" | sed 's,^.*/,,'`
    tmpdepfile="$stripped.u"
  fi
  if test $stat -eq 0; then :
  else
    rm -f "$tmpdepfile"
    exit $stat
  fi
-  if test -f "$tmpdepfile"; then
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
-    outname="$stripped.o"
+  do
-    # Each line is of the form `foo.o: dependent.h'.
+    test -f "$tmpdepfile" && break
-    # Do two passes, one to just change these to
+  done
-    # `$object: dependent.h' and one to simply `dependent.h:'.
+  aix_post_process_depfile
-    sed -e "s,^$outname:,$object :," < "$tmpdepfile" > "$depfile"
+  ;;
-    sed -e "s,^$outname: \(.*\)$,\1:," < "$tmpdepfile" >> "$depfile"
+
-  else
+tcc)
-    # The sourcefile does not contain any dependencies, so just
+  # tcc (Tiny C Compiler) understand '-MD -MF file' since version 0.9.26
-    # store a dummy comment line, to avoid errors with the Makefile
+  # FIXME: That version still under development at the moment of writing.
-    # "include basename.Plo" scheme.
+  #        Make that this statement remains true also for stable, released
-    echo "#dummy" > "$depfile"
+  #        versions.
  # It will wrap lines (doesn't matter whether long or short) with a
  # trailing '\', as in:
  #
  #   foo.o : \
  #    foo.c \
  #    foo.h \
  #
  # It will put a trailing '\' even on the last line, and will use leading
  # spaces rather than leading tabs (at least since its commit 0394caf7
  # "Emit spaces for -MD").
  "$@" -MD -MF "$tmpdepfile"
  stat=$?
  if test $stat -ne 0; then
    rm -f "$tmpdepfile"
    exit $stat
  fi
  rm -f "$depfile"
  # Each non-empty line is of the form 'foo.o : \' or ' dep.h \'.
  # We have to change lines of the first kind to '$object: \'.
  sed -e "s|.*:|$object :|" < "$tmpdepfile" > "$depfile"
  # And for each line of the second kind, we have to emit a 'dep.h:'
  # dummy dependency, to avoid the deleted-header problem.
  sed -n -e 's|^  *\(.*\) *\\$|\1:|p' < "$tmpdepfile" >> "$depfile"
  rm -f "$tmpdepfile"
  ;;
-icc)
+## The order of this option in the case statement is important, since the
-  # Intel's C compiler understands `-MD -MF file'.  However on
+## shell code in configure will try each of these formats in the order
-  #    icc -MD -MF foo.d -c -o sub/foo.o sub/foo.c
+## listed in this file.  A plain '-MD' option would be understood by many
-  # ICC 7.0 will fill foo.d with something like
+## compilers, so we must ensure this comes after the gcc and icc options.
-  #    foo.o: sub/foo.c
+pgcc)
-  #    foo.o: sub/foo.h
+  # Portland's C compiler understands '-MD'.
-  # which is wrong.  We want:
+  # Will always output deps to 'file.d' where file is the root name of the
-  #    sub/foo.o: sub/foo.c
+  # source file under compilation, even if file resides in a subdirectory.
-  #    sub/foo.o: sub/foo.h
+  # The object file name does not affect the name of the '.d' file.
-  #    sub/foo.c:
+  # pgcc 10.2 will output
  #    sub/foo.h:
  # ICC 7.1 will output
  #    foo.o: sub/foo.c sub/foo.h
-  # and will wrap long lines using \ :
+  # and will wrap long lines using '\' :
  #    foo.o: sub/foo.c ... \
  #     sub/foo.h ... \
  #     ...
  set_dir_from "$object"
  # Use the source, not the object, to determine the base name, since
  # that's sadly what pgcc will do too.
  set_base_from "$source"
  tmpdepfile=$base.d
-  "$@" -MD -MF "$tmpdepfile"
+  # For projects that build the same source file twice into different object
-  stat=$?
+  # files, the pgcc approach of using the *source* file root name can cause
-  if test $stat -eq 0; then :
+  # problems in parallel builds.  Use a locking strategy to avoid stomping on
-  else
+  # the same $tmpdepfile.
  lockdir=$base.d-lock
  trap "
    echo '$0: caught signal, cleaning up...' >&2
    rmdir '$lockdir'
    exit 1
  " 1 2 13 15
  numtries=100
  i=$numtries
  while test $i -gt 0; do
    # mkdir is a portable test-and-set.
    if mkdir "$lockdir" 2>/dev/null; then
      # This process acquired the lock.
      "$@" -MD
      stat=$?
      # Release the lock.
      rmdir "$lockdir"
      break
    else
      # If the lock is being held by a different process, wait
      # until the winning process is done or we timeout.
      while test -d "$lockdir" && test $i -gt 0; do
        sleep 1
        i=`expr $i - 1`
      done
    fi
    i=`expr $i - 1`
  done
  trap - 1 2 13 15
  if test $i -le 0; then
    echo "$0: failed to acquire lock after $numtries attempts" >&2
    echo "$0: check lockdir '$lockdir'" >&2
    exit 1
  fi
  if test $stat -ne 0; then
    rm -f "$tmpdepfile"
    exit $stat
  fi
@ -285,8 +427,8 @@ icc)
  sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile"
  # Some versions of the HPUX 10.20 sed can't process this invocation
  # correctly.  Breaking it into two sed invocations is a workaround.
-  sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" |
+  sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" \
-    sed -e 's/$/ :/' >> "$depfile"
+    | sed -e 's/$/ :/' >> "$depfile"
  rm -f "$tmpdepfile"
  ;;
@ -297,9 +439,8 @@ hp2)
  # 'foo.d', which lands next to the object file, wherever that
  # happens to be.
  # Much of this is similar to the tru64 case; see comments there.
-  dir=`echo "$object" | sed -e 's|/[^/]*$|/|'`
+  set_dir_from  "$object"
-  test "x$dir" = "x$object" && dir=
+  set_base_from "$object"
  base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'`
  if test "$libtool" = yes; then
    tmpdepfile1=$dir$base.d
    tmpdepfile2=$dir.libs/$base.d
@ -310,8 +451,7 @@ hp2)
    "$@" +Maked
  fi
  stat=$?
-  if test $stat -eq 0; then :
+  if test $stat -ne 0; then
  else
     rm -f "$tmpdepfile1" "$tmpdepfile2"
     exit $stat
  fi
@ -321,72 +461,107 @@ hp2)
    test -f "$tmpdepfile" && break
  done
  if test -f "$tmpdepfile"; then
-    sed -e "s,^.*\.[a-z]*:,$object:," "$tmpdepfile" > "$depfile"
+    sed -e "s,^.*\.[$lower]*:,$object:," "$tmpdepfile" > "$depfile"
-    # Add `dependent.h:' lines.
+    # Add 'dependent.h:' lines.
-    sed -ne '2,${; s/^ *//; s/ \\*$//; s/$/:/; p;}' "$tmpdepfile" >> "$depfile"
+    sed -ne '2,${
               s/^ *//
               s/ \\*$//
               s/$/:/
               p
             }' "$tmpdepfile" >> "$depfile"
  else
-    echo "#dummy" > "$depfile"
+    make_dummy_depfile
  fi
  rm -f "$tmpdepfile" "$tmpdepfile2"
  ;;
 tru64)
-   # The Tru64 compiler uses -MD to generate dependencies as a side
+  # The Tru64 compiler uses -MD to generate dependencies as a side
-   # effect.  `cc -MD -o foo.o ...' puts the dependencies into `foo.o.d'.
+  # effect.  'cc -MD -o foo.o ...' puts the dependencies into 'foo.o.d'.
-   # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put
+  # At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put
-   # dependencies in `foo.d' instead, so we check for that too.
+  # dependencies in 'foo.d' instead, so we check for that too.
-   # Subdirectories are respected.
+  # Subdirectories are respected.
-   dir=`echo "$object" | sed -e 's|/[^/]*$|/|'`
+  set_dir_from  "$object"
-   test "x$dir" = "x$object" && dir=
+  set_base_from "$object"
   base=`echo "$object" | sed -e 's|^.*/||' -e 's/\.o$//' -e 's/\.lo$//'`
-   if test "$libtool" = yes; then
+  if test "$libtool" = yes; then
-      # With Tru64 cc, shared objects can also be used to make a
+    # Libtool generates 2 separate objects for the 2 libraries.  These
-      # static library.  This mechanism is used in libtool 1.4 series to
+    # two compilations output dependencies in $dir.libs/$base.o.d and
-      # handle both shared and static libraries in a single compilation.
+    # in $dir$base.o.d.  We have to check for both files, because
-      # With libtool 1.4, dependencies were output in $dir.libs/$base.lo.d.
+    # one of the two compilations can be disabled.  We should prefer
-      #
+    # $dir$base.o.d over $dir.libs/$base.o.d because the latter is
-      # With libtool 1.5 this exception was removed, and libtool now
+    # automatically cleaned when .libs/ is deleted, while ignoring
-      # generates 2 separate objects for the 2 libraries.  These two
+    # the former would cause a distcleancheck panic.
-      # compilations output dependencies in $dir.libs/$base.o.d and
+    tmpdepfile1=$dir$base.o.d          # libtool 1.5
-      # in $dir$base.o.d.  We have to check for both files, because
+    tmpdepfile2=$dir.libs/$base.o.d    # Likewise.
-      # one of the two compilations can be disabled.  We should prefer
+    tmpdepfile3=$dir.libs/$base.d      # Compaq CCC V6.2-504
-      # $dir$base.o.d over $dir.libs/$base.o.d because the latter is
+    "$@" -Wc,-MD
-      # automatically cleaned when .libs/ is deleted, while ignoring
+  else
-      # the former would cause a distcleancheck panic.
+    tmpdepfile1=$dir$base.d
-      tmpdepfile1=$dir.libs/$base.lo.d   # libtool 1.4
+    tmpdepfile2=$dir$base.d
-      tmpdepfile2=$dir$base.o.d          # libtool 1.5
+    tmpdepfile3=$dir$base.d
-      tmpdepfile3=$dir.libs/$base.o.d    # libtool 1.5
+    "$@" -MD
-      tmpdepfile4=$dir.libs/$base.d      # Compaq CCC V6.2-504
+  fi
      "$@" -Wc,-MD
   else
      tmpdepfile1=$dir$base.o.d
      tmpdepfile2=$dir$base.d
      tmpdepfile3=$dir$base.d
      tmpdepfile4=$dir$base.d
      "$@" -MD
   fi
-   stat=$?
+  stat=$?
-   if test $stat -eq 0; then :
+  if test $stat -ne 0; then
-   else
+    rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
-      rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" "$tmpdepfile4"
+    exit $stat
-      exit $stat
+  fi
   fi
-   for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3" "$tmpdepfile4"
+  for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
-   do
+  do
-     test -f "$tmpdepfile" && break
+    test -f "$tmpdepfile" && break
-   done
+  done
-   if test -f "$tmpdepfile"; then
+  # Same post-processing that is required for AIX mode.
-      sed -e "s,^.*\.[a-z]*:,$object:," < "$tmpdepfile" > "$depfile"
+  aix_post_process_depfile
-      # That's a tab and a space in the [].
+  ;;
-      sed -e 's,^.*\.[a-z]*:[	 ]*,,' -e 's,$,:,' < "$tmpdepfile" >> "$depfile"
+
-   else
+msvc7)
-      echo "#dummy" > "$depfile"
+  if test "$libtool" = yes; then
-   fi
+    showIncludes=-Wc,-showIncludes
-   rm -f "$tmpdepfile"
+  else
-   ;;
+    showIncludes=-showIncludes
  fi
  "$@" $showIncludes > "$tmpdepfile"
  stat=$?
  grep -v '^Note: including file: ' "$tmpdepfile"
  if test $stat -ne 0; then
    rm -f "$tmpdepfile"
    exit $stat
  fi
  rm -f "$depfile"
  echo "$object : \\" > "$depfile"
  # The first sed program below extracts the file names and escapes
  # backslashes for cygpath.  The second sed program outputs the file
  # name when reading, but also accumulates all include files in the
  # hold buffer in order to output them again at the end.  This only
  # works with sed implementations that can handle large buffers.
  sed < "$tmpdepfile" -n '
 /^Note: including file:  *\(.*\)/ {
  s//\1/
  s/\\/\\\\/g
  p
 }' | $cygpath_u | sort -u | sed -n '
 s/ /\\ /g
 s/\(.*\)/'"$tab"'\1 \\/p
 s/.\(.*\) \\/\1:/
 H
 $ {
  s/.*/'"$tab"'/
  G
  p
 }' >> "$depfile"
  echo >> "$depfile" # make sure the fragment doesn't end with a backslash
  rm -f "$tmpdepfile"
  ;;
 msvc7msys)
  # This case exists only to let depend.m4 do its work.  It works by
  # looking at the text of this script.  This case will never be run,
  # since it is checked for above.
  exit 1
  ;;
 #nosideeffect)
  # This comment above is used by automake to tell side-effect
@ -399,13 +574,13 @@ dashmstdout)
  # Remove the call to Libtool.
  if test "$libtool" = yes; then
-    while test $1 != '--mode=compile'; do
+    while test "X$1" != 'X--mode=compile'; do
      shift
    done
    shift
  fi
-  # Remove `-o $object'.
+  # Remove '-o $object'.
  IFS=" "
  for arg
  do
@ -425,18 +600,18 @@ dashmstdout)
  done
  test -z "$dashmflag" && dashmflag=-M
-  # Require at least two characters before searching for `:'
+  # Require at least two characters before searching for ':'
  # in the target name.  This is to cope with DOS-style filenames:
-  # a dependency such as `c:/foo/bar' could be seen as target `c' otherwise.
+  # a dependency such as 'c:/foo/bar' could be seen as target 'c' otherwise.
  "$@" $dashmflag |
-    sed 's:^[  ]*[^: ][^:][^:]*\:[    ]*:'"$object"'\: :' > "$tmpdepfile"
+    sed "s|^[$tab ]*[^:$tab ][^:][^:]*:[$tab ]*|$object: |" > "$tmpdepfile"
  rm -f "$depfile"
  cat < "$tmpdepfile" > "$depfile"
-  tr ' ' '
+  # Some versions of the HPUX 10.20 sed can't process this sed invocation
-' < "$tmpdepfile" | \
+  # correctly.  Breaking it into two sed invocations is a workaround.
-## Some versions of the HPUX 10.20 sed can't process this invocation
+  tr ' ' "$nl" < "$tmpdepfile" \
-## correctly.  Breaking it into two sed invocations is a workaround.
+    | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
-    sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile"
+    | sed -e 's/$/ :/' >> "$depfile"
  rm -f "$tmpdepfile"
  ;;
@ -450,41 +625,51 @@ makedepend)
  "$@" || exit $?
  # Remove any Libtool call
  if test "$libtool" = yes; then
-    while test $1 != '--mode=compile'; do
+    while test "X$1" != 'X--mode=compile'; do
      shift
    done
    shift
  fi
  # X makedepend
  shift
-  cleared=no
+  cleared=no eat=no
-  for arg in "$@"; do
+  for arg
  do
    case $cleared in
    no)
      set ""; shift
      cleared=yes ;;
    esac
    if test $eat = yes; then
      eat=no
      continue
    fi
    case "$arg" in
    -D*|-I*)
      set fnord "$@" "$arg"; shift ;;
    # Strip any option that makedepend may not understand.  Remove
    # the object too, otherwise makedepend will parse it as a source file.
    -arch)
      eat=yes ;;
    -*|$object)
      ;;
    *)
      set fnord "$@" "$arg"; shift ;;
    esac
  done
-  obj_suffix="`echo $object | sed 's/^.*\././'`"
+  obj_suffix=`echo "$object" | sed 's/^.*\././'`
  touch "$tmpdepfile"
  ${MAKEDEPEND-makedepend} -o"$obj_suffix" -f"$tmpdepfile" "$@"
  rm -f "$depfile"
-  cat < "$tmpdepfile" > "$depfile"
+  # makedepend may prepend the VPATH from the source file name to the object.
-  sed '1,2d' "$tmpdepfile" | tr ' ' '
+  # No need to regex-escape $object, excess matching of '.' is harmless.
-' | \
+  sed "s|^.*\($object *:\)|\1|" "$tmpdepfile" > "$depfile"
-## Some versions of the HPUX 10.20 sed can't process this invocation
+  # Some versions of the HPUX 10.20 sed can't process the last invocation
-## correctly.  Breaking it into two sed invocations is a workaround.
+  # correctly.  Breaking it into two sed invocations is a workaround.
-    sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' | sed -e 's/$/ :/' >> "$depfile"
+  sed '1,2d' "$tmpdepfile" \
    | tr ' ' "$nl" \
    | sed -e 's/^\\$//' -e '/^$/d' -e '/:$/d' \
    | sed -e 's/$/ :/' >> "$depfile"
  rm -f "$tmpdepfile" "$tmpdepfile".bak
  ;;
@ -495,13 +680,13 @@ cpp)
  # Remove the call to Libtool.
  if test "$libtool" = yes; then
-    while test $1 != '--mode=compile'; do
+    while test "X$1" != 'X--mode=compile'; do
      shift
    done
    shift
  fi
-  # Remove `-o $object'.
+  # Remove '-o $object'.
  IFS=" "
  for arg
  do
@ -520,10 +705,10 @@ cpp)
    esac
  done
-  "$@" -E |
+  "$@" -E \
-    sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
+    | sed -n -e '/^# [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
-       -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' |
+             -e '/^#line [0-9][0-9]* "\([^"]*\)".*/ s:: \1 \\:p' \
-    sed '$ s: \\$::' > "$tmpdepfile"
+    | sed '$ s: \\$::' > "$tmpdepfile"
  rm -f "$depfile"
  echo "$object : \\" > "$depfile"
  cat < "$tmpdepfile" >> "$depfile"
@ -533,35 +718,56 @@ cpp)
 msvisualcpp)
  # Important note: in order to support this mode, a compiler *must*
-  # always write the preprocessed file to stdout, regardless of -o,
+  # always write the preprocessed file to stdout.
  # because we must use -o when running libtool.
  "$@" || exit $?
  # Remove the call to Libtool.
  if test "$libtool" = yes; then
    while test "X$1" != 'X--mode=compile'; do
      shift
    done
    shift
  fi
  IFS=" "
  for arg
  do
    case "$arg" in
    -o)
      shift
      ;;
    $object)
      shift
      ;;
    "-Gm"|"/Gm"|"-Gi"|"/Gi"|"-ZI"|"/ZI")
-	set fnord "$@"
+        set fnord "$@"
-	shift
+        shift
-	shift
+        shift
-	;;
+        ;;
    *)
-	set fnord "$@" "$arg"
+        set fnord "$@" "$arg"
-	shift
+        shift
-	shift
+        shift
-	;;
+        ;;
    esac
  done
-  "$@" -E |
+  "$@" -E 2>/dev/null |
-  sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::echo "`cygpath -u \\"\1\\"`":p' | sort | uniq > "$tmpdepfile"
+  sed -n '/^#line [0-9][0-9]* "\([^"]*\)"/ s::\1:p' | $cygpath_u | sort -u > "$tmpdepfile"
  rm -f "$depfile"
  echo "$object : \\" > "$depfile"
-  . "$tmpdepfile" | sed 's% %\\ %g' | sed -n '/^\(.*\)$/ s::	\1 \\:p' >> "$depfile"
+  sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::'"$tab"'\1 \\:p' >> "$depfile"
-  echo "	" >> "$depfile"
+  echo "$tab" >> "$depfile"
-  . "$tmpdepfile" | sed 's% %\\ %g' | sed -n '/^\(.*\)$/ s::\1\::p' >> "$depfile"
+  sed < "$tmpdepfile" -n -e 's% %\\ %g' -e '/^\(.*\)$/ s::\1\::p' >> "$depfile"
  rm -f "$tmpdepfile"
  ;;
 msvcmsys)
  # This case exists only to let depend.m4 do its work.  It works by
  # looking at the text of this script.  This case will never be run,
  # since it is checked for above.
  exit 1
  ;;
 none)
  exec "$@"
  ;;
@ -580,5 +786,6 @@ exit 0
 # eval: (add-hook 'write-file-hooks 'time-stamp)
 # time-stamp-start: "scriptversion="
 # time-stamp-format: "%:y-%02m-%02d.%02H"
-# time-stamp-end: "$"
+# time-stamp-time-zone: "UTC"
 # time-stamp-end: "; # UTC"
 # End:
--- a/autotools/install-sh
+++ b/autotools/install-sh
@ -1,7 +1,7 @@
 #!/bin/sh
 # install - install a program, script, or datafile
-scriptversion=2006-10-14.15
+scriptversion=2011-11-20.07; # UTC
 # This originates from X11R5 (mit/util/scripts/install.sh), which was
 # later released in X11R6 (xc/config/util/install.sh) with the
@ -35,7 +35,7 @@ scriptversion=2006-10-14.15
 # FSF changes to this file are in the public domain.
 #
 # Calling this script install-sh is preferred over install.sh, to prevent
-# `make' implicit rules from creating a file called install from it
+# 'make' implicit rules from creating a file called install from it
 # when there is no Makefile.
 #
 # This script is compatible with the BSD install script, but was written
@ -48,7 +48,7 @@ IFS=" ""	$nl"
 # set DOITPROG to echo to test this script
 # Don't use :- since 4.3BSD and earlier shells don't like it.
-doit="${DOITPROG-}"
+doit=${DOITPROG-}
 if test -z "$doit"; then
  doit_exec=exec
 else
@ -58,34 +58,49 @@ fi
 # Put in absolute file names if you don't have them in your path;
 # or use environment vars.
-mvprog="${MVPROG-mv}"
+chgrpprog=${CHGRPPROG-chgrp}
-cpprog="${CPPROG-cp}"
+chmodprog=${CHMODPROG-chmod}
-chmodprog="${CHMODPROG-chmod}"
+chownprog=${CHOWNPROG-chown}
-chownprog="${CHOWNPROG-chown}"
+cmpprog=${CMPPROG-cmp}
-chgrpprog="${CHGRPPROG-chgrp}"
+cpprog=${CPPROG-cp}
-stripprog="${STRIPPROG-strip}"
+mkdirprog=${MKDIRPROG-mkdir}
-rmprog="${RMPROG-rm}"
+mvprog=${MVPROG-mv}
-mkdirprog="${MKDIRPROG-mkdir}"
+rmprog=${RMPROG-rm}
 stripprog=${STRIPPROG-strip}
 posix_glob='?'
 initialize_posix_glob='
  test "$posix_glob" != "?" || {
    if (set -f) 2>/dev/null; then
      posix_glob=
    else
      posix_glob=:
    fi
  }
 '
 posix_glob=
 posix_mkdir=
 # Desired mode of installed file.
 mode=0755
 chgrpcmd=
 chmodcmd=$chmodprog
 chowncmd=
-chgrpcmd=
+mvcmd=$mvprog
 stripcmd=
 rmcmd="$rmprog -f"
-mvcmd="$mvprog"
+stripcmd=
 src=
 dst=
 dir_arg=
-dstarg=
+dst_arg=
 copy_on_change=false
 no_target_directory=
-usage="Usage: $0 [OPTION]... [-T] SRCFILE DSTFILE
+usage="\
 Usage: $0 [OPTION]... [-T] SRCFILE DSTFILE
   or: $0 [OPTION]... SRCFILES... DIRECTORY
   or: $0 [OPTION]... -t DIRECTORY SRCFILES...
   or: $0 [OPTION]... -d DIRECTORIES...
@ -95,65 +110,59 @@ In the 2nd and 3rd, copy all SRCFILES to DIRECTORY.
 In the 4th, create DIRECTORIES.
 Options:
-c         (ignored)
+     --help     display this help and exit.
-d         create directories instead of installing files.
+     --version  display version info and exit.
-g GROUP   $chgrpprog installed files to GROUP.
+
-m MODE    $chmodprog installed files to MODE.
+  -c            (ignored)
-o USER    $chownprog installed files to USER.
+  -C            install only if different (preserve the last data modification time)
-s         $stripprog installed files.
+  -d            create directories instead of installing files.
-t DIRECTORY  install into DIRECTORY.
+  -g GROUP      $chgrpprog installed files to GROUP.
-T         report an error if DSTFILE is a directory.
+  -m MODE       $chmodprog installed files to MODE.
--help     display this help and exit.
+  -o USER       $chownprog installed files to USER.
--version  display version info and exit.
+  -s            $stripprog installed files.
  -t DIRECTORY  install into DIRECTORY.
  -T            report an error if DSTFILE is a directory.
 Environment variables override the default commands:
-  CHGRPPROG CHMODPROG CHOWNPROG CPPROG MKDIRPROG MVPROG RMPROG STRIPPROG
+  CHGRPPROG CHMODPROG CHOWNPROG CMPPROG CPPROG MKDIRPROG MVPROG
  RMPROG STRIPPROG
 "
 while test $# -ne 0; do
  case $1 in
-    -c) shift
+    -c) ;;
        continue;;
-    -d) dir_arg=true
+    -C) copy_on_change=true;;
-        shift
+
-        continue;;
+    -d) dir_arg=true;;
    -g) chgrpcmd="$chgrpprog $2"
-        shift
+	shift;;
        shift
        continue;;
    --help) echo "$usage"; exit $?;;
    -m) mode=$2
        shift
        shift
 	case $mode in
 	  *' '* | *'	'* | *'
 '*	  | *'*'* | *'?'* | *'['*)
 	    echo "$0: invalid mode: $mode" >&2
 	    exit 1;;
 	esac
-        continue;;
+	shift;;
    -o) chowncmd="$chownprog $2"
-        shift
+	shift;;
        shift
        continue;;
-    -s) stripcmd=$stripprog
+    -s) stripcmd=$stripprog;;
        shift
        continue;;
-    -t) dstarg=$2
+    -t) dst_arg=$2
-	shift
+	# Protect names problematic for 'test' and other utilities.
-	shift
+	case $dst_arg in
-	continue;;
+	  -* | [=\(\)!]) dst_arg=./$dst_arg;;
 	esac
 	shift;;
-    -T) no_target_directory=true
+    -T) no_target_directory=true;;
 	shift
 	continue;;
    --version) echo "$0 $scriptversion"; exit $?;;
@ -165,21 +174,26 @@ while test $# -ne 0; do
    *)  break;;
  esac
  shift
 done
-if test $# -ne 0 && test -z "$dir_arg$dstarg"; then
+if test $# -ne 0 && test -z "$dir_arg$dst_arg"; then
  # When -d is used, all remaining arguments are directories to create.
  # When -t is used, the destination is already specified.
  # Otherwise, the last argument is the destination.  Remove it from $@.
  for arg
  do
-    if test -n "$dstarg"; then
+    if test -n "$dst_arg"; then
      # $@ is not empty: it contains at least $arg.
-      set fnord "$@" "$dstarg"
+      set fnord "$@" "$dst_arg"
      shift # fnord
    fi
    shift # arg
-    dstarg=$arg
+    dst_arg=$arg
    # Protect names problematic for 'test' and other utilities.
    case $dst_arg in
      -* | [=\(\)!]) dst_arg=./$dst_arg;;
    esac
  done
 fi
@ -188,13 +202,17 @@ if test $# -eq 0; then
    echo "$0: no input file specified." >&2
    exit 1
  fi
-  # It's OK to call `install-sh -d' without argument.
+  # It's OK to call 'install-sh -d' without argument.
  # This can happen when creating conditional directories.
  exit 0
 fi
 if test -z "$dir_arg"; then
-  trap '(exit $?); exit' 1 2 13 15
+  do_exit='(exit $ret); exit $ret'
  trap "ret=129; $do_exit" 1
  trap "ret=130; $do_exit" 2
  trap "ret=141; $do_exit" 13
  trap "ret=143; $do_exit" 15
  # Set umask so as not to create temps with too-generous modes.
  # However, 'strip' requires both read and write access to temps.
@ -222,9 +240,9 @@ fi
 for src
 do
-  # Protect names starting with `-'.
+  # Protect names problematic for 'test' and other utilities.
  case $src in
-    -*) src=./$src ;;
+    -* | [=\(\)!]) src=./$src;;
  esac
  if test -n "$dir_arg"; then
@ -242,22 +260,17 @@ do
      exit 1
    fi
-    if test -z "$dstarg"; then
+    if test -z "$dst_arg"; then
      echo "$0: no destination specified." >&2
      exit 1
    fi
-
+    dst=$dst_arg
    dst=$dstarg
    # Protect names starting with `-'.
    case $dst in
      -*) dst=./$dst ;;
    esac
    # If destination is a directory, append the input filename; won't work
    # if double slashes aren't ignored.
    if test -d "$dst"; then
      if test -n "$no_target_directory"; then
-	echo "$0: $dstarg: Is a directory" >&2
+	echo "$0: $dst_arg: Is a directory" >&2
 	exit 1
      fi
      dstdir=$dst
@ -341,7 +354,7 @@ do
 	      if test -z "$dir_arg" || {
 		   # Check for POSIX incompatibilities with -m.
 		   # HP-UX 11.23 and IRIX 6.5 mkdir -m -p sets group- or
-		   # other-writeable bit of parent directory when it shouldn't.
+		   # other-writable bit of parent directory when it shouldn't.
 		   # FreeBSD 6.1 mkdir -m -p sets mode of existing directory.
 		   ls_ld_tmpdir=`ls -ld "$tmpdir"`
 		   case $ls_ld_tmpdir in
@ -378,33 +391,26 @@ do
      # directory the slow way, step by step, checking for races as we go.
      case $dstdir in
-	/*) prefix=/ ;;
+	/*) prefix='/';;
-	-*) prefix=./ ;;
+	[-=\(\)!]*) prefix='./';;
-	*)  prefix= ;;
+	*)  prefix='';;
      esac
-      case $posix_glob in
+      eval "$initialize_posix_glob"
        '')
 	  if (set -f) 2>/dev/null; then
 	    posix_glob=true
 	  else
 	    posix_glob=false
 	  fi ;;
      esac
      oIFS=$IFS
      IFS=/
-      $posix_glob && set -f
+      $posix_glob set -f
      set fnord $dstdir
      shift
-      $posix_glob && set +f
+      $posix_glob set +f
      IFS=$oIFS
      prefixes=
      for d
      do
-	test -z "$d" && continue
+	test X"$d" = X && continue
 	prefix=$prefix$d
 	if test -d "$prefix"; then
@ -459,41 +465,54 @@ do
    # ignore errors from any of these, just make sure not to ignore
    # errors from the above "$doit $cpprog $src $dsttmp" command.
    #
-    { test -z "$chowncmd" || $doit $chowncmd "$dsttmp"; } \
+    { test -z "$chowncmd" || $doit $chowncmd "$dsttmp"; } &&
-      && { test -z "$chgrpcmd" || $doit $chgrpcmd "$dsttmp"; } \
+    { test -z "$chgrpcmd" || $doit $chgrpcmd "$dsttmp"; } &&
-      && { test -z "$stripcmd" || $doit $stripcmd "$dsttmp"; } \
+    { test -z "$stripcmd" || $doit $stripcmd "$dsttmp"; } &&
-      && { test -z "$chmodcmd" || $doit $chmodcmd $mode "$dsttmp"; } &&
+    { test -z "$chmodcmd" || $doit $chmodcmd $mode "$dsttmp"; } &&
-    # Now rename the file to the real destination.
+    # If -C, don't bother to copy if it wouldn't change the file.
-    { $doit $mvcmd -f "$dsttmp" "$dst" 2>/dev/null \
+    if $copy_on_change &&
-      || {
+       old=`LC_ALL=C ls -dlL "$dst"	2>/dev/null` &&
-	   # The rename failed, perhaps because mv can't rename something else
+       new=`LC_ALL=C ls -dlL "$dsttmp"	2>/dev/null` &&
 	   # to itself, or perhaps because mv is so ancient that it does not
 	   # support -f.
-	   # Now remove or move aside any old file at destination location.
+       eval "$initialize_posix_glob" &&
-	   # We try this two ways since rm can't unlink itself on some
+       $posix_glob set -f &&
-	   # systems and the destination file might be busy for other
+       set X $old && old=:$2:$4:$5:$6 &&
-	   # reasons.  In this case, the final cleanup might fail but the new
+       set X $new && new=:$2:$4:$5:$6 &&
-	   # file should still install successfully.
+       $posix_glob set +f &&
 	   {
 	     if test -f "$dst"; then
 	       $doit $rmcmd -f "$dst" 2>/dev/null \
 	       || { $doit $mvcmd -f "$dst" "$rmtmp" 2>/dev/null \
 		     && { $doit $rmcmd -f "$rmtmp" 2>/dev/null; :; }; }\
 	       || {
 		 echo "$0: cannot unlink or rename $dst" >&2
 		 (exit 1); exit 1
 	       }
 	     else
 	       :
 	     fi
 	   } &&
-	   # Now rename the file to the real destination.
+       test "$old" = "$new" &&
-	   $doit $mvcmd "$dsttmp" "$dst"
+       $cmpprog "$dst" "$dsttmp" >/dev/null 2>&1
-	 }
+    then
-    } || exit 1
+      rm -f "$dsttmp"
    else
      # Rename the file to the real destination.
      $doit $mvcmd -f "$dsttmp" "$dst" 2>/dev/null ||
      # The rename failed, perhaps because mv can't rename something else
      # to itself, or perhaps because mv is so ancient that it does not
      # support -f.
      {
 	# Now remove or move aside any old file at destination location.
 	# We try this two ways since rm can't unlink itself on some
 	# systems and the destination file might be busy for other
 	# reasons.  In this case, the final cleanup might fail but the new
 	# file should still install successfully.
 	{
 	  test ! -f "$dst" ||
 	  $doit $rmcmd -f "$dst" 2>/dev/null ||
 	  { $doit $mvcmd -f "$dst" "$rmtmp" 2>/dev/null &&
 	    { $doit $rmcmd -f "$rmtmp" 2>/dev/null; :; }
 	  } ||
 	  { echo "$0: cannot unlink or rename $dst" >&2
 	    (exit 1); exit 1
 	  }
 	} &&
 	# Now rename the file to the real destination.
 	$doit $mvcmd "$dsttmp" "$dst"
      }
    fi || exit 1
    trap '' 0
  fi
@ -503,5 +522,6 @@ done
 # eval: (add-hook 'write-file-hooks 'time-stamp)
 # time-stamp-start: "scriptversion="
 # time-stamp-format: "%:y-%02m-%02d.%02H"
-# time-stamp-end: "$"
+# time-stamp-time-zone: "UTC"
 # time-stamp-end: "; # UTC"
 # End:
--- a/autotools/missing
+++ b/autotools/missing
@ -1,11 +1,10 @@
 #! /bin/sh
-# Common stub for a few missing GNU programs while installing.
+# Common wrapper for a few potentially missing GNU programs.
-scriptversion=2006-05-10.23
+scriptversion=2012-06-26.16; # UTC
-# Copyright (C) 1996, 1997, 1999, 2000, 2002, 2003, 2004, 2005, 2006
+# Copyright (C) 1996-2013 Free Software Foundation, Inc.
-#   Free Software Foundation, Inc.
+# Originally written by Fran,cois Pinard <pinard@iro.umontreal.ca>, 1996.
 # Originally by Fran,cois Pinard <pinard@iro.umontreal.ca>, 1996.
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@ -18,9 +17,7 @@ scriptversion=2006-05-10.23
 # GNU General Public License for more details.
 # You should have received a copy of the GNU General Public License
-# along with this program; if not, write to the Free Software
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 # 02110-1301, USA.
 # As a special exception to the GNU General Public License, if you
 # distribute this file as part of a program that contains a
@ -28,66 +25,40 @@ scriptversion=2006-05-10.23
 # the same distribution terms that you use for the rest of that program.
 if test $# -eq 0; then
-  echo 1>&2 "Try \`$0 --help' for more information"
+  echo 1>&2 "Try '$0 --help' for more information"
  exit 1
 fi
 run=:
 sed_output='s/.* --output[ =]\([^ ]*\).*/\1/p'
 sed_minuso='s/.* -o \([^ ]*\).*/\1/p'
 # In the cases where this matters, `missing' is being run in the
 # srcdir already.
 if test -f configure.ac; then
  configure_ac=configure.ac
 else
  configure_ac=configure.in
 fi
 msg="missing on your system"
 case $1 in
--run)
+
-  # Try to run requested program, and just exit if it succeeds.
+  --is-lightweight)
-  run=
+    # Used by our autoconf macros to check whether the available missing
-  shift
+    # script is modern enough.
-  "$@" && exit 0
+    exit 0
-  # Exit code 63 means version mismatch.  This often happens
+    ;;
-  # when the user try to use an ancient version of a tool on
+
-  # a file that requires a minimum version.  In this case we
+  --run)
-  # we should proceed has if the program had been absent, or
+    # Back-compat with the calling convention used by older automake.
-  # if --run hadn't been passed.
+    shift
-  if test $? = 63; then
+    ;;
    run=:
    msg="probably too old"
  fi
  ;;
  -h|--h|--he|--hel|--help)
    echo "\
 $0 [OPTION]... PROGRAM [ARGUMENT]...
-Handle \`PROGRAM [ARGUMENT]...' for when PROGRAM is missing, or return an
+Run 'PROGRAM [ARGUMENT]...', returning a proper advice when this fails due
-error status if there is no known handling for PROGRAM.
+to PROGRAM being missing or too old.
 Options:
  -h, --help      display this help and exit
  -v, --version   output version information and exit
  --run           try to run the given command, and emulate it if it fails
 Supported PROGRAM values:
-  aclocal      touch file \`aclocal.m4'
+  aclocal   autoconf  autoheader   autom4te  automake  makeinfo
-  autoconf     touch file \`configure'
+  bison     yacc      flex         lex       help2man
-  autoheader   touch file \`config.h.in'
+
-  autom4te     touch the output file, or create a stub one
+Version suffixes to PROGRAM as well as the prefixes 'gnu-', 'gnu', and
-  automake     touch all \`Makefile.in' files
+'g' are ignored when checking the name.
  bison        create \`y.tab.[ch]', if possible, from existing .[ch]
  flex         create \`lex.yy.c', if possible, from existing .c
  help2man     touch the output file
  lex          create \`lex.yy.c', if possible, from existing .c
  makeinfo     touch the output file
  tar          try tar, gnutar, gtar, then tar without non-portable flags
  yacc         create \`y.tab.[ch]', if possible, from existing .[ch]
 Send bug reports to <bug-automake@gnu.org>."
    exit $?
@ -99,269 +70,146 @@ Send bug reports to <bug-automake@gnu.org>."
    ;;
  -*)
-    echo 1>&2 "$0: Unknown \`$1' option"
+    echo 1>&2 "$0: unknown '$1' option"
-    echo 1>&2 "Try \`$0 --help' for more information"
+    echo 1>&2 "Try '$0 --help' for more information"
    exit 1
    ;;
 esac
-# Now exit if we have it, but it failed.  Also exit now if we
+# Run the given program, remember its exit status.
-# don't have it and --version was passed (most likely to detect
+"$@"; st=$?
-# the program).
+
-case $1 in
+# If it succeeded, we are done.
-  lex|yacc)
+test $st -eq 0 && exit 0
-    # Not GNU programs, they don't have --version.
+
 # Also exit now if we it failed (or wasn't found), and '--version' was
 # passed; such an option is passed most likely to detect whether the
 # program is present and works.
 case $2 in --version|--help) exit $st;; esac
 # Exit code 63 means version mismatch.  This often happens when the user
 # tries to use an ancient version of a tool on a file that requires a
 # minimum version.
 if test $st -eq 63; then
  msg="probably too old"
 elif test $st -eq 127; then
  # Program was missing.
  msg="missing on your system"
 else
  # Program was found and executed, but failed.  Give up.
  exit $st
 fi
 perl_URL=http://www.perl.org/
 flex_URL=http://flex.sourceforge.net/
 gnu_software_URL=http://www.gnu.org/software
 program_details ()
 {
  case $1 in
    aclocal|automake)
      echo "The '$1' program is part of the GNU Automake package:"
      echo "<$gnu_software_URL/automake>"
      echo "It also requires GNU Autoconf, GNU m4 and Perl in order to run:"
      echo "<$gnu_software_URL/autoconf>"
      echo "<$gnu_software_URL/m4/>"
      echo "<$perl_URL>"
      ;;
    autoconf|autom4te|autoheader)
      echo "The '$1' program is part of the GNU Autoconf package:"
      echo "<$gnu_software_URL/autoconf/>"
      echo "It also requires GNU m4 and Perl in order to run:"
      echo "<$gnu_software_URL/m4/>"
      echo "<$perl_URL>"
      ;;
  esac
 }
 give_advice ()
 {
  # Normalize program name to check for.
  normalized_program=`echo "$1" | sed '
    s/^gnu-//; t
    s/^gnu//; t
    s/^g//; t'`
  printf '%s\n' "'$1' is $msg."
  configure_deps="'configure.ac' or m4 files included by 'configure.ac'"
  case $normalized_program in
    autoconf*)
      echo "You should only need it if you modified 'configure.ac',"
      echo "or m4 files included by it."
      program_details 'autoconf'
      ;;
    autoheader*)
      echo "You should only need it if you modified 'acconfig.h' or"
      echo "$configure_deps."
      program_details 'autoheader'
      ;;
    automake*)
      echo "You should only need it if you modified 'Makefile.am' or"
      echo "$configure_deps."
      program_details 'automake'
      ;;
    aclocal*)
      echo "You should only need it if you modified 'acinclude.m4' or"
      echo "$configure_deps."
      program_details 'aclocal'
      ;;
   autom4te*)
      echo "You might have modified some maintainer files that require"
      echo "the 'automa4te' program to be rebuilt."
      program_details 'autom4te'
      ;;
    bison*|yacc*)
      echo "You should only need it if you modified a '.y' file."
      echo "You may want to install the GNU Bison package:"
      echo "<$gnu_software_URL/bison/>"
      ;;
    lex*|flex*)
      echo "You should only need it if you modified a '.l' file."
      echo "You may want to install the Fast Lexical Analyzer package:"
      echo "<$flex_URL>"
      ;;
    help2man*)
      echo "You should only need it if you modified a dependency" \
           "of a man page."
      echo "You may want to install the GNU Help2man package:"
      echo "<$gnu_software_URL/help2man/>"
    ;;
    makeinfo*)
      echo "You should only need it if you modified a '.texi' file, or"
      echo "any other file indirectly affecting the aspect of the manual."
      echo "You might want to install the Texinfo package:"
      echo "<$gnu_software_URL/texinfo/>"
      echo "The spurious makeinfo call might also be the consequence of"
      echo "using a buggy 'make' (AIX, DU, IRIX), in which case you might"
      echo "want to install GNU make:"
      echo "<$gnu_software_URL/make/>"
      ;;
    *)
      echo "You might have modified some files without having the proper"
      echo "tools for further handling them.  Check the 'README' file, it"
      echo "often tells you about the needed prerequisites for installing"
      echo "this package.  You may also peek at any GNU archive site, in"
      echo "case some other package contains this missing '$1' program."
      ;;
  esac
 }
-  tar)
+give_advice "$1" | sed -e '1s/^/WARNING: /' \
-    if test -n "$run"; then
+                       -e '2,$s/^/         /' >&2
       echo 1>&2 "ERROR: \`tar' requires --run"
       exit 1
    elif test "x$2" = "x--version" || test "x$2" = "x--help"; then
       exit 1
    fi
    ;;
-  *)
+# Propagate the correct exit status (expected to be 127 for a program
-    if test -z "$run" && ($1 --version) > /dev/null 2>&1; then
+# not found, 63 for a program that failed due to version mismatch).
-       # We have it, but it failed.
+exit $st
       exit 1
    elif test "x$2" = "x--version" || test "x$2" = "x--help"; then
       # Could not run --version or --help.  This is probably someone
       # running `$TOOL --version' or `$TOOL --help' to check whether
       # $TOOL exists and not knowing $TOOL uses missing.
       exit 1
    fi
    ;;
 esac
 # If it does not exist, or fails to run (possibly an outdated version),
 # try to emulate it.
 case $1 in
  aclocal*)
    echo 1>&2 "\
 WARNING: \`$1' is $msg.  You should only need it if
         you modified \`acinclude.m4' or \`${configure_ac}'.  You might want
         to install the \`Automake' and \`Perl' packages.  Grab them from
         any GNU archive site."
    touch aclocal.m4
    ;;
  autoconf)
    echo 1>&2 "\
 WARNING: \`$1' is $msg.  You should only need it if
         you modified \`${configure_ac}'.  You might want to install the
         \`Autoconf' and \`GNU m4' packages.  Grab them from any GNU
         archive site."
    touch configure
    ;;
  autoheader)
    echo 1>&2 "\
 WARNING: \`$1' is $msg.  You should only need it if
         you modified \`acconfig.h' or \`${configure_ac}'.  You might want
         to install the \`Autoconf' and \`GNU m4' packages.  Grab them
         from any GNU archive site."
    files=`sed -n 's/^[ ]*A[CM]_CONFIG_HEADER(\([^)]*\)).*/\1/p' ${configure_ac}`
    test -z "$files" && files="config.h"
    touch_files=
    for f in $files; do
      case $f in
      *:*) touch_files="$touch_files "`echo "$f" |
 				       sed -e 's/^[^:]*://' -e 's/:.*//'`;;
      *) touch_files="$touch_files $f.in";;
      esac
    done
    touch $touch_files
    ;;
  automake*)
    echo 1>&2 "\
 WARNING: \`$1' is $msg.  You should only need it if
         you modified \`Makefile.am', \`acinclude.m4' or \`${configure_ac}'.
         You might want to install the \`Automake' and \`Perl' packages.
         Grab them from any GNU archive site."
    find . -type f -name Makefile.am -print |
 	   sed 's/\.am$/.in/' |
 	   while read f; do touch "$f"; done
    ;;
  autom4te)
    echo 1>&2 "\
 WARNING: \`$1' is needed, but is $msg.
         You might have modified some files without having the
         proper tools for further handling them.
         You can get \`$1' as part of \`Autoconf' from any GNU
         archive site."
    file=`echo "$*" | sed -n "$sed_output"`
    test -z "$file" && file=`echo "$*" | sed -n "$sed_minuso"`
    if test -f "$file"; then
 	touch $file
    else
 	test -z "$file" || exec >$file
 	echo "#! /bin/sh"
 	echo "# Created by GNU Automake missing as a replacement of"
 	echo "#  $ $@"
 	echo "exit 0"
 	chmod +x $file
 	exit 1
    fi
    ;;
  bison|yacc)
    echo 1>&2 "\
 WARNING: \`$1' $msg.  You should only need it if
         you modified a \`.y' file.  You may need the \`Bison' package
         in order for those modifications to take effect.  You can get
         \`Bison' from any GNU archive site."
    rm -f y.tab.c y.tab.h
    if test $# -ne 1; then
        eval LASTARG="\${$#}"
 	case $LASTARG in
 	*.y)
 	    SRCFILE=`echo "$LASTARG" | sed 's/y$/c/'`
 	    if test -f "$SRCFILE"; then
 	         cp "$SRCFILE" y.tab.c
 	    fi
 	    SRCFILE=`echo "$LASTARG" | sed 's/y$/h/'`
 	    if test -f "$SRCFILE"; then
 	         cp "$SRCFILE" y.tab.h
 	    fi
 	  ;;
 	esac
    fi
    if test ! -f y.tab.h; then
 	echo >y.tab.h
    fi
    if test ! -f y.tab.c; then
 	echo 'main() { return 0; }' >y.tab.c
    fi
    ;;
  lex|flex)
    echo 1>&2 "\
 WARNING: \`$1' is $msg.  You should only need it if
         you modified a \`.l' file.  You may need the \`Flex' package
         in order for those modifications to take effect.  You can get
         \`Flex' from any GNU archive site."
    rm -f lex.yy.c
    if test $# -ne 1; then
        eval LASTARG="\${$#}"
 	case $LASTARG in
 	*.l)
 	    SRCFILE=`echo "$LASTARG" | sed 's/l$/c/'`
 	    if test -f "$SRCFILE"; then
 	         cp "$SRCFILE" lex.yy.c
 	    fi
 	  ;;
 	esac
    fi
    if test ! -f lex.yy.c; then
 	echo 'main() { return 0; }' >lex.yy.c
    fi
    ;;
  help2man)
    echo 1>&2 "\
 WARNING: \`$1' is $msg.  You should only need it if
 	 you modified a dependency of a manual page.  You may need the
 	 \`Help2man' package in order for those modifications to take
 	 effect.  You can get \`Help2man' from any GNU archive site."
    file=`echo "$*" | sed -n "$sed_output"`
    test -z "$file" && file=`echo "$*" | sed -n "$sed_minuso"`
    if test -f "$file"; then
 	touch $file
    else
 	test -z "$file" || exec >$file
 	echo ".ab help2man is required to generate this page"
 	exit 1
    fi
    ;;
  makeinfo)
    echo 1>&2 "\
 WARNING: \`$1' is $msg.  You should only need it if
         you modified a \`.texi' or \`.texinfo' file, or any other file
         indirectly affecting the aspect of the manual.  The spurious
         call might also be the consequence of using a buggy \`make' (AIX,
         DU, IRIX).  You might want to install the \`Texinfo' package or
         the \`GNU make' package.  Grab either from any GNU archive site."
    # The file to touch is that specified with -o ...
    file=`echo "$*" | sed -n "$sed_output"`
    test -z "$file" && file=`echo "$*" | sed -n "$sed_minuso"`
    if test -z "$file"; then
      # ... or it is the one specified with @setfilename ...
      infile=`echo "$*" | sed 's/.* \([^ ]*\) *$/\1/'`
      file=`sed -n '
 	/^@setfilename/{
 	  s/.* \([^ ]*\) *$/\1/
 	  p
 	  q
 	}' $infile`
      # ... or it is derived from the source name (dir/f.texi becomes f.info)
      test -z "$file" && file=`echo "$infile" | sed 's,.*/,,;s,.[^.]*$,,'`.info
    fi
    # If the file does not exist, the user really needs makeinfo;
    # let's fail without touching anything.
    test -f $file || exit 1
    touch $file
    ;;
  tar)
    shift
    # We have already tried tar in the generic part.
    # Look for gnutar/gtar before invocation to avoid ugly error
    # messages.
    if (gnutar --version > /dev/null 2>&1); then
       gnutar "$@" && exit 0
    fi
    if (gtar --version > /dev/null 2>&1); then
       gtar "$@" && exit 0
    fi
    firstarg="$1"
    if shift; then
 	case $firstarg in
 	*o*)
 	    firstarg=`echo "$firstarg" | sed s/o//`
 	    tar "$firstarg" "$@" && exit 0
 	    ;;
 	esac
 	case $firstarg in
 	*h*)
 	    firstarg=`echo "$firstarg" | sed s/h//`
 	    tar "$firstarg" "$@" && exit 0
 	    ;;
 	esac
    fi
    echo 1>&2 "\
 WARNING: I can't seem to be able to run \`tar' with the given arguments.
         You may want to install GNU tar or Free paxutils, or check the
         command line arguments."
    exit 1
    ;;
  *)
    echo 1>&2 "\
 WARNING: \`$1' is needed, and is $msg.
         You might have modified some files without having the
         proper tools for further handling them.  Check the \`README' file,
         it often tells you about the needed prerequisites for installing
         this package.  You may also peek at any GNU archive site, in case
         some other package would contain this missing \`$1' program."
    exit 1
    ;;
 esac
 exit 0
 # Local variables:
 # eval: (add-hook 'write-file-hooks 'time-stamp)
 # time-stamp-start: "scriptversion="
 # time-stamp-format: "%:y-%02m-%02d.%02H"
-# time-stamp-end: "$"
+# time-stamp-time-zone: "UTC"
 # time-stamp-end: "; # UTC"
 # End: