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   # We used to keeping the `.' as first argument, in order to
   # allow $(mkdir_p) to be used without argument.  As in

   #   $(mkdir_p) $(somedir)

   # where $(somedir) is conditionally defined.  However this is wrong
   # for two reasons:
   #  1. if the package is installed by a user who cannot write `.'
   #     make install will fail,
   #  2. the above comment should most certainly read
   #     $(mkdir_p) $(DESTDIR)$(somedir)
   #     so it does not work when $(somedir) is undefined and
   #     $(DESTDIR) is not.
   #  To support the latter case, we have to write
   #     test -z "$(somedir)" || $(mkdir_p) $(DESTDIR)$(somedir),
   #  so the `.' trick is pointless.
   mkdir_p='mkdir -p --'

 else
   # On NextStep and OpenStep, the `mkdir' command does not
   # recognize any option.  It will interpret all options as
   # directories to create, and then abort because `.' already
   # exists.
   for d in ./-p ./--version;
   do
     test -d $d && rmdir $d
   done
   # $(mkinstalldirs) is defined by Automake if mkinstalldirs exists.
   if test -f "$ac_aux_dir/mkinstalldirs"; then
     mkdir_p='$(mkinstalldirs)'
   else
     mkdir_p='$(install_sh) -d'
   fi
 fi
 AC_SUBST([mkdir_p])])

 # Helper functions for option handling.                     -*- Autoconf -*-

 # Copyright (C) 2001, 2002, 2003, 2005  Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.

 # serial 3

 # _AM_MANGLE_OPTION(NAME)
 # -----------------------
 AC_DEFUN([_AM_MANGLE_OPTION],
 [[_AM_OPTION_]m4_bpatsubst($1, [[^a-zA-Z0-9_]], [_])])
 
 # _AM_SET_OPTION(NAME)
 # ------------------------------
 # Set option NAME.  Presently that only means defining a flag for this option.
 AC_DEFUN([_AM_SET_OPTION],
 [m4_define(_AM_MANGLE_OPTION([$1]), 1)])
 
 # _AM_SET_OPTIONS(OPTIONS)
 # ----------------------------------
 # OPTIONS is a space-separated list of Automake options.
 AC_DEFUN([_AM_SET_OPTIONS],
 [AC_FOREACH([_AM_Option], [$1], [_AM_SET_OPTION(_AM_Option)])])
 
 # _AM_IF_OPTION(OPTION, IF-SET, [IF-NOT-SET])
 # -------------------------------------------
 # Execute IF-SET if OPTION is set, IF-NOT-SET otherwise.
 AC_DEFUN([_AM_IF_OPTION],
 [m4_ifset(_AM_MANGLE_OPTION([$1]), [$2], [$3])])
 

 # Check to make sure that the build environment is sane.    -*- Autoconf -*-

 # Copyright (C) 1996, 1997, 2000, 2001, 2003, 2005
 # Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.

 # serial 4

 
 # AM_SANITY_CHECK
 # ---------------
 AC_DEFUN([AM_SANITY_CHECK],
 [AC_MSG_CHECKING([whether build environment is sane])
 # Just in case
 sleep 1
 echo timestamp > conftest.file
 # Do `set' in a subshell so we don't clobber the current shell's
 # arguments.  Must try -L first in case configure is actually a
 # symlink; some systems play weird games with the mod time of symlinks
 # (eg FreeBSD returns the mod time of the symlink's containing
 # directory).
 if (
    set X `ls -Lt $srcdir/configure conftest.file 2> /dev/null`
    if test "$[*]" = "X"; then
       # -L didn't work.
       set X `ls -t $srcdir/configure conftest.file`
    fi
    rm -f conftest.file
    if test "$[*]" != "X $srcdir/configure conftest.file" \
       && test "$[*]" != "X conftest.file $srcdir/configure"; then
 
       # If neither matched, then we have a broken ls.  This can happen
       # if, for instance, CONFIG_SHELL is bash and it inherits a
       # broken ls alias from the environment.  This has actually
       # happened.  Such a system could not be considered "sane".
       AC_MSG_ERROR([ls -t appears to fail.  Make sure there is not a broken
 alias in your environment])
    fi
 
    test "$[2]" = conftest.file
    )
 then
    # Ok.
    :
 else
    AC_MSG_ERROR([newly created file is older than distributed files!
 Check your system clock])
 fi
 AC_MSG_RESULT(yes)])
 

 # Copyright (C) 2001, 2003, 2005  Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.

 # AM_PROG_INSTALL_STRIP
 # ---------------------

 # One issue with vendor `install' (even GNU) is that you can't
 # specify the program used to strip binaries.  This is especially
 # annoying in cross-compiling environments, where the build's strip
 # is unlikely to handle the host's binaries.
 # Fortunately install-sh will honor a STRIPPROG variable, so we
 # always use install-sh in `make install-strip', and initialize
 # STRIPPROG with the value of the STRIP variable (set by the user).
 AC_DEFUN([AM_PROG_INSTALL_STRIP],
 [AC_REQUIRE([AM_PROG_INSTALL_SH])dnl
 # Installed binaries are usually stripped using `strip' when the user
 # run `make install-strip'.  However `strip' might not be the right
 # tool to use in cross-compilation environments, therefore Automake
 # will honor the `STRIP' environment variable to overrule this program.
 dnl Don't test for $cross_compiling = yes, because it might be `maybe'.
 if test "$cross_compiling" != no; then
   AC_CHECK_TOOL([STRIP], [strip], :)
 fi
 INSTALL_STRIP_PROGRAM="\${SHELL} \$(install_sh) -c -s"
 AC_SUBST([INSTALL_STRIP_PROGRAM])])

 # Check how to create a tarball.                            -*- Autoconf -*-
 
 # Copyright (C) 2004, 2005  Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
 
 # serial 2
 
 # _AM_PROG_TAR(FORMAT)
 # --------------------
 # Check how to create a tarball in format FORMAT.
 # FORMAT should be one of `v7', `ustar', or `pax'.
 #
 # Substitute a variable $(am__tar) that is a command
 # writing to stdout a FORMAT-tarball containing the directory
 # $tardir.
 #     tardir=directory && $(am__tar) > result.tar
 #
 # Substitute a variable $(am__untar) that extract such
 # a tarball read from stdin.
 #     $(am__untar) < result.tar
 AC_DEFUN([_AM_PROG_TAR],
 [# Always define AMTAR for backward compatibility.
 AM_MISSING_PROG([AMTAR], [tar])
 m4_if([$1], [v7],
      [am__tar='${AMTAR} chof - "$$tardir"'; am__untar='${AMTAR} xf -'],
      [m4_case([$1], [ustar],, [pax],,
               [m4_fatal([Unknown tar format])])
 AC_MSG_CHECKING([how to create a $1 tar archive])
 # Loop over all known methods to create a tar archive until one works.
 _am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none'
 _am_tools=${am_cv_prog_tar_$1-$_am_tools}
 # Do not fold the above two line into one, because Tru64 sh and
 # Solaris sh will not grok spaces in the rhs of `-'.
 for _am_tool in $_am_tools
 do
   case $_am_tool in
   gnutar)
     for _am_tar in tar gnutar gtar;
     do
       AM_RUN_LOG([$_am_tar --version]) && break
     done
     am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$$tardir"'
     am__tar_="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$tardir"'
     am__untar="$_am_tar -xf -"
     ;;
   plaintar)
     # Must skip GNU tar: if it does not support --format= it doesn't create
     # ustar tarball either.
     (tar --version) >/dev/null 2>&1 && continue
     am__tar='tar chf - "$$tardir"'
     am__tar_='tar chf - "$tardir"'
     am__untar='tar xf -'
     ;;
   pax)
     am__tar='pax -L -x $1 -w "$$tardir"'
     am__tar_='pax -L -x $1 -w "$tardir"'
     am__untar='pax -r'
     ;;
   cpio)
     am__tar='find "$$tardir" -print | cpio -o -H $1 -L'
     am__tar_='find "$tardir" -print | cpio -o -H $1 -L'
     am__untar='cpio -i -H $1 -d'
     ;;
   none)
     am__tar=false
     am__tar_=false
     am__untar=false
     ;;
   esac
 
   # If the value was cached, stop now.  We just wanted to have am__tar
   # and am__untar set.
   test -n "${am_cv_prog_tar_$1}" && break
 
   # tar/untar a dummy directory, and stop if the command works
   rm -rf conftest.dir
   mkdir conftest.dir
   echo GrepMe > conftest.dir/file
   AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar])
   rm -rf conftest.dir
   if test -s conftest.tar; then
     AM_RUN_LOG([$am__untar <conftest.tar])
     grep GrepMe conftest.dir/file >/dev/null 2>&1 && break
   fi
 done
 rm -rf conftest.dir
 
 AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])
 AC_MSG_RESULT([$am_cv_prog_tar_$1])])
 AC_SUBST([am__tar])
 AC_SUBST([am__untar])
 ]) # _AM_PROG_TAR
 

 m4_include([acinclude.m4])