freebsd/contrib/cvs/aclocal.m4

# aclocal.m4 generated automatically by aclocal 1.4e

# Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000
# 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.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY, to the extent permitted by law; without
# even the implied warranty of MERCHANTABILITY or FITNESS FOR A
# PARTICULAR PURPOSE.

/* 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
   the Free Software Foundation; either version 2, or (at your option)
   any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.  */

AC_DEFUN(ACX_WITH_GSSAPI,[
#
# Use --with-gssapi[=DIR] to enable GSSAPI support.
#
# defaults to enabled with DIR in default list below
#
# Search for /SUNHEA/ and read the comments about this default below.
#
AC_ARG_WITH([gssapi],
	    [  --with-gssapi=value     GSSAPI directory],
	    [acx_gssapi_withgssapi=$withval], [acx_gssapi_withgssapi=yes])dnl

dnl
dnl FIXME - cache withval and obliterate later cache values when options change
dnl
#
# Try to locate a GSSAPI installation if no location was specified, assuming
# GSSAPI was enabled (the default).
# 
if test -n "$acx_gssapi_cv_gssapi"; then
  # Granted, this is a slightly ugly way to print this info, but the
  # AC_CHECK_HEADER used in the search for a GSSAPI installation makes using
  # AC_CACHE_CHECK worse
  AC_MSG_CHECKING([for GSSAPI])
else :; fi
AC_CACHE_VAL([acx_gssapi_cv_gssapi], [
if test x$acx_gssapi_withgssapi = xyes; then
  # --with but no location specified
  # assume a gssapi.h or gssapi/gssapi.h locates our install.
  #
  # This isn't always strictly true.  For instance Solaris 7's SUNHEA (header)
  # package installs gssapi.h whether or not the necessary libraries are
  # installed.  I'm still not sure whether to consider this a bug.  The long
  # way around is to not consider GSSPAI installed unless gss_import_name is
  # found, but that brings up a lot of other hassles, like continuing to let
  # gcc & ld generate the error messages when the user uses --with-gssapi=dir
  # as a debugging aid.  The short way around is to disable GSSAPI by default,
  # but I think Sun users have been faced with this for awhile and I haven't
  # heard many complaints.
  acx_gssapi_save_CPPFLAGS=$CPPFLAGS
  for acx_gssapi_cv_gssapi in yes /usr/kerberos /usr/cygnus/kerbnet no; do
    if test x$acx_gssapi_cv_gssapi = xno; then
      break
    fi
    if test x$acx_gssapi_cv_gssapi = xyes; then
      AC_CHECKING([for GSSAPI])
    else
      CPPFLAGS="$acx_gssapi_save_CPPFLAGS -I$acx_gssapi_cv_gssapi/include"
      AC_CHECKING([for GSSAPI in $acx_gssapi_cv_gssapi])
    fi
    unset ac_cv_header_gssapi_h
    unset ac_cv_header_gssapi_gssapi_h
    AC_CHECK_HEADERS([gssapi.h gssapi/gssapi.h])
    if test "$ac_cv_header_gssapi_h" = "yes" ||
        test "$ac_cv_header_gssapi_gssapi_h" = "yes"; then
      break
    fi
  done
  CPPFLAGS=$acx_gssapi_save_CPPFLAGS
else
  acx_gssapi_cv_gssapi=$acx_gssapi_withgssapi
fi
AC_MSG_CHECKING([for GSSAPI])
])dnl
AC_MSG_RESULT([$acx_gssapi_cv_gssapi])

#
# Set up GSSAPI includes for later use.  We don't bother to check for
# $acx_gssapi_cv_gssapi=no here since that will be caught later.
#
if test x$acx_gssapi_cv_gssapi = yes; then
  # no special includes necessary
  GSSAPI_INCLUDES=""
else
  # GSSAPI at $acx_gssapi_cv_gssapi (could be 'no')
  GSSAPI_INCLUDES=" -I$acx_gssapi_cv_gssapi/include"
fi

#
# Get the rest of the information CVS needs to compile with GSSAPI support
#
if test x$acx_gssapi_cv_gssapi != xno; then
  # define HAVE_GSSAPI and set up the includes
  AC_DEFINE([HAVE_GSSAPI],, [Define if you have GSSAPI with Kerberos version 5 available.])
  includeopt=$includeopt$GSSAPI_INCLUDES

  # locate any other headers
  acx_gssapi_save_CPPFLAGS=$CPPFLAGS
  CPPFLAGS=$CPPFLAGS$GSSAPI_INCLUDES
  dnl We don't use HAVE_KRB5_H anywhere, but including it here might make it
  dnl easier to spot errors by reading configure output
  AC_CHECK_HEADERS([gssapi.h gssapi/gssapi.h gssapi/gssapi_generic.h krb5.h])
  # And look through them for GSS_C_NT_HOSTBASED_SERVICE or its alternatives
  AC_CACHE_CHECK([for GSS_C_NT_HOSTBASED_SERVICE], [acx_gssapi_cv_gss_c_nt_hostbased_service],
   [acx_gssapi_cv_gss_c_nt_hostbased_service=no
    if test "$ac_cv_header_gssapi_h" = "yes"; then
      AC_EGREP_HEADER([GSS_C_NT_HOSTBASED_SERVICE], [gssapi.h],
		      [acx_gssapi_cv_gss_c_nt_hostbased_service=yes],
		      AC_EGREP_HEADER([gss_nt_service_name], [gssapi.h],
				      [acx_gssapi_cv_gss_c_nt_hostbased_service=gss_nt_service_name]))
    fi
    if test $acx_gssapi_cv_gss_c_nt_hostbased_service = no &&
        test "$ac_cv_header_gssapi_gssapi_h" = "yes"; then
      AC_EGREP_HEADER([GSS_C_NT_HOSTBASED_SERVICE], [gssapi/gssapi.h],
		      [acx_gssapi_cv_gss_c_nt_hostbased_service],
		      AC_EGREP_HEADER([gss_nt_service_name], [gssapi/gssapi.h],
				      [acx_gssapi_cv_gss_c_nt_hostbased_service=gss_nt_service_name]))
    fi
    if test $acx_gssapi_cv_gss_c_nt_hostbased_service = no &&
        test "$ac_cv_header_gssapi_gssapi_generic_h" = "yes"; then
      AC_EGREP_HEADER([GSS_C_NT_HOSTBASED_SERVICE], [gssapi/gssapi_generic.h],
		      [acx_gssapi_cv_gss_c_nt_hostbased_service],
		      AC_EGREP_HEADER([gss_nt_service_name], [gssapi/gssapi_generic.h],
				      [acx_gssapi_cv_gss_c_nt_hostbased_service=gss_nt_service_name]))
    fi])
  if test $acx_gssapi_cv_gss_c_nt_hostbased_service != yes &&
      test $acx_gssapi_cv_gss_c_nt_hostbased_service != no; then
    # don't define for yes since that means it already means something and
    # don't define for no since we'd rather the compiler catch the error
    AC_DEFINE_UNQUOTED([GSS_C_NT_HOSTBASED_SERVICE], [$acx_gssapi_cv_gss_c_nt_hostbased_service],
[Define to an alternative value if GSS_C_NT_HOSTBASED_SERVICE isn't defined
in the gssapi.h header file.  MIT Kerberos 1.2.1 requires this.  Only relevant
when using GSSAPI.])
  fi
  CPPFLAGS=$acx_gssapi_save_CPPFLAGS

  # Expect the libs to be installed parallel to the headers
  #
  # We could try once with and once without, but I'm not sure it's worth the
  # trouble.
  if test x$acx_gssapi_cv_gssapi != xyes; then
    if test -z "$LIBS"; then
      LIBS="-L$acx_gssapi_cv_gssapi/lib"
    else
      LIBS="-L$acx_gssapi_cv_gssapi/lib $LIBS"
    fi
  else :; fi

  dnl What happens if we want to enable, say, krb5 and some other GSSAPI
  dnl authentication method at the same time?
  #
  # Some of the order below is particular due to library dependencies
  #

  #
  # des			Heimdal K 0.3d, but Heimdal seems to be set up such
  #			that it could have been installed from elsewhere.
  #
  AC_SEARCH_LIBS([des_set_odd_parity], [des])

  #
  # com_err		Heimdal K 0.3d
  #
  # com_err		MIT K5 v1.2.2-beta1
  #
  AC_SEARCH_LIBS([com_err], [com_err])

  #
  # asn1		Heimdal K 0.3d		-lcom_err
  #
  AC_SEARCH_LIBS([initialize_asn1_error_table_r], [asn1])

  #
  # resolv		required, but not installed by Heimdal K 0.3d
  #
  # resolv		MIT K5 1.2.2-beta1
  # 			Linux 2.2.17
  #
  AC_SEARCH_LIBS([__dn_expand], [resolv])

  #
  # roken		Heimdal K 0.3d		-lresolv
  #
  AC_SEARCH_LIBS([roken_gethostbyaddr], [roken])

  #
  # k5crypto		MIT K5 v1.2.2-beta1
  #
  AC_SEARCH_LIBS([valid_enctype], [k5crypto])

  #
  # gen			? ? ?			Needed on Irix 5.3 with some
  #			Irix 5.3		version of Kerberos.  I'm not
  #						sure which since Irix didn't
  #						get any testing this time
  #						around.  Original comment:
  #
  # This is necessary on Irix 5.3, in order to link against libkrb5 --
  # there, an_to_ln.o refers to things defined only in -lgen.
  #
  AC_SEARCH_LIBS([compile], [gen])

  #
  # krb5		? ? ?			-lgen -l???
  #			Irix 5.3
  #
  # krb5		MIT K5 v1.1.1
  #
  # krb5		MIT K5 v1.2.2-beta1	-lcrypto -lcom_err
  # 			Linux 2.2.17
  #
  # krb5		MIT K5 v1.2.2-beta1	-lcrypto -lcom_err -lresolv
  #
  # krb5		Heimdal K 0.3d		-lasn1 -lroken -ldes
  #
  AC_SEARCH_LIBS([krb5_free_context], [krb5])

  #
  # gssapi_krb5		Only lib needed with MIT K5 v1.2.1, so find it first in
  #			order to prefer MIT Kerberos.  If both MIT & Heimdal
  #			Kerberos are installed and in the path, this will leave
  #			some of the libraries above in LIBS unnecessarily, but
  #			noone would ever do that, right?
  #
  # gssapi_krb5		MIT K5 v1.2.2-beta1	-lkrb5
  #
  # gssapi		Heimdal K 0.3d		-lkrb5
  #
  AC_SEARCH_LIBS([gss_import_name], [gssapi_krb5 gssapi])
fi
])dnl

# Do all the work for Automake.  This macro actually does too much --
# some checks are only needed if your package does certain things.
# But this isn't really a big deal.

# serial 5

# There are a few dirty hacks below to avoid letting `AC_PROG_CC' be
# written in clear, in which case automake, when reading aclocal.m4,
# will think it sees a *use*, and therefore will trigger all it's
# C support machinery.  Also note that it means that autoscan, seeing
# CC etc. in the Makefile, will ask for an AC_PROG_CC use...


# We require 2.13 because we rely on SHELL being computed by configure.
AC_PREREQ([2.13])

# AC_PROVIDE_IFELSE(MACRO-NAME, IF-PROVIDED, IF-NOT-PROVIDED)
# -----------------------------------------------------------
# If MACRO-NAME is provided do IF-PROVIDED, else IF-NOT-PROVIDED.
# The purpose of this macro is to provide the user with a means to
# check macros which are provided without letting her know how the
# information is coded.
# If this macro is not defined by Autoconf, define it here.
ifdef([AC_PROVIDE_IFELSE],
      [],
      [define([AC_PROVIDE_IFELSE],
              [ifdef([AC_PROVIDE_$1],
                     [$2], [$3])])])


# AM_INIT_AUTOMAKE(PACKAGE,VERSION, [NO-DEFINE])
# ----------------------------------------------
AC_DEFUN([AM_INIT_AUTOMAKE],
[AC_REQUIRE([AC_PROG_INSTALL])dnl
# test to see if srcdir already configured
if test "`CDPATH=:; cd $srcdir && pwd`" != "`pwd`" &&
   test -f $srcdir/config.status; then
  AC_MSG_ERROR([source directory already configured; run \"make distclean\" there first])
fi

# Define the identity of the package.
PACKAGE=$1
AC_SUBST(PACKAGE)dnl
VERSION=$2
AC_SUBST(VERSION)dnl
ifelse([$3],,
[AC_DEFINE_UNQUOTED(PACKAGE, "$PACKAGE", [Name of package])
AC_DEFINE_UNQUOTED(VERSION, "$VERSION", [Version number of package])])

# Autoconf 2.50 wants to disallow AM_ names.  We explicitly allow
# the ones we care about.
ifdef([m4_pattern_allow],
      [m4_pattern_allow([^AM_(C|CPP|CXX|OBJC|F|R|GCJ)FLAGS])])dnl

# Some tools Automake needs.
AC_REQUIRE([AM_SANITY_CHECK])dnl
AC_REQUIRE([AC_ARG_PROGRAM])dnl
AM_MISSING_PROG(ACLOCAL, aclocal)
AM_MISSING_PROG(AUTOCONF, autoconf)
AM_MISSING_PROG(AUTOMAKE, automake)
AM_MISSING_PROG(AUTOHEADER, autoheader)
AM_MISSING_PROG(MAKEINFO, makeinfo)
AM_MISSING_PROG(AMTAR, tar)
AM_MISSING_INSTALL_SH
AM_PROG_INSTALL_STRIP
# We need awk for the "check" target.  The system "awk" is bad on
# some platforms.
AC_REQUIRE([AC_PROG_AWK])dnl
AC_REQUIRE([AC_PROG_MAKE_SET])dnl
AC_REQUIRE([AM_PROG_ETAGS])dnl
AC_REQUIRE([AM_DEP_TRACK])dnl
AC_REQUIRE([AM_SET_DEPDIR])dnl
AC_PROVIDE_IFELSE([AC_PROG_][CC],
                  [AM_DEPENDENCIES(CC)],
                  [define([AC_PROG_][CC],
                          defn([AC_PROG_][CC])[AM_DEPENDENCIES(CC)])])dnl
AC_PROVIDE_IFELSE([AC_PROG_][CXX],
                  [AM_DEPENDENCIES(CXX)],
                  [define([AC_PROG_][CXX],
                          defn([AC_PROG_][CXX])[AM_DEPENDENCIES(CXX)])])dnl
])

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

# serial 3

# 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 $srcdir/configure conftest.file`
   fi
   if test "$[*]" != "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
rm -f conftest*
AC_MSG_RESULT(yes)])


# serial 2

# AM_MISSING_PROG(NAME, PROGRAM)
# ------------------------------
AC_DEFUN([AM_MISSING_PROG],
[AC_REQUIRE([AM_MISSING_HAS_RUN])
$1=${$1-"${am_missing_run}$2"}
AC_SUBST($1)])


# AM_MISSING_INSTALL_SH
# ---------------------
# Like AM_MISSING_PROG, but only looks for install-sh.
AC_DEFUN([AM_MISSING_INSTALL_SH],
[AC_REQUIRE([AM_MISSING_HAS_RUN])
if test -z "$install_sh"; then
   for install_sh in "$ac_aux_dir/install-sh" \
                     "$ac_aux_dir/install.sh" \
                     "${am_missing_run}${ac_auxdir}/install-sh";
   do
     test -f "$install_sh" && break
   done
   # FIXME: an evil hack: we remove the SHELL invocation from
   # install_sh because automake adds it back in.  Sigh.
   install_sh=`echo $install_sh | sed -e 's/\${SHELL}//'`
fi
AC_SUBST(install_sh)])


# AM_MISSING_HAS_RUN
# ------------------
# Define MISSING if not defined so far and test if it supports --run.
# If it does, set am_missing_run to use it, otherwise, to nothing.
AC_DEFUN([AM_MISSING_HAS_RUN],
[test x"${MISSING+set}" = xset ||
  MISSING="\${SHELL} `CDPATH=:; cd $ac_aux_dir && pwd`/missing"
# Use eval to expand $SHELL
if eval "$MISSING --run true"; then
  am_missing_run="$MISSING --run "
else
  am_missing_run=
  am_backtick='`'
  AC_MSG_WARN([${am_backtick}missing' script is too old or missing])
fi
])

# AM_AUX_DIR_EXPAND

# For projects using AC_CONFIG_AUX_DIR([foo]), Autoconf sets
# $ac_aux_dir to ${srcdir}/foo.  In other projects, it is set to `.'.
# Of course, Automake must honor this variable whenever it call a tool
# from the auxiliary directory.  The problem is that $srcdir (hence
# $ac_aux_dir) can be either an absolute path or a path relative to
# $top_srcdir or absolute, this depends on how configure is run.  This
# is pretty anoying since it makes $ac_aux_dir quite unusable in
# subdirectories: on the top source directory, any form will work
# fine, but in subdirectories relative pat needs to be adapted.
# - calling $top_srcidr/$ac_aux_dir/missing would success if $srcdir is
#   relative, but fail if $srcdir is absolute
# - conversly, calling $ax_aux_dir/missing would fail if $srcdir is
#   absolute, and success on relative paths.
#
# Consequently, we define and use $am_aux_dir, the "always absolute"
# version of $ac_aux_dir.

AC_DEFUN([AM_AUX_DIR_EXPAND], [
# expand $ac_aux_dir to an absolute path
am_aux_dir=`CDPATH=:; cd $ac_aux_dir && pwd`
])

# 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 if we ever
# need to use a non standard strip, we just have to make sure we use
# install-sh with the STRIPPROG variable set.
AC_DEFUN([AM_PROG_INSTALL_STRIP],
[AC_REQUIRE([AM_MISSING_INSTALL_SH])
dnl Don't test for $cross_compiling = yes, it might be `maybe'...
# We'd like to do this but we can't because it will unconditionally
# require config.guess.  One way would be if autoconf had the capability
# to let us compile in this code only when config.guess was already
# a possibility.
#if test "$cross_compiling" != no; then
#  # since we are cross-compiling, we need to check for a suitable `strip'
#  AM_PROG_STRIP
#  if test -z "$STRIP"; then
#    AC_MSG_WARN([strip missing, install-strip will not strip binaries])
#  fi
#fi

# If $STRIP is defined (either by the user, or by AM_PROG_STRIP),
# instruct install-strip to use install-sh and the given $STRIP program.
# Otherwise, just use ${INSTALL}: the idea is to use the vendor install
# as much as possible, because it's faster.
if test -z "$STRIP"; then
  # The top level make will set INSTALL_PROGRAM=$(INSTALL_STRIP_PROGRAM)
  # and the double dolard below is there to make sure that ${INSTALL}
  # is substitued in the sub-makes, not at the top-level; this is
  # needed if ${INSTALL} is a relative path (ajusted in each subdirectory
  # by config.status).
  INSTALL_STRIP_PROGRAM='$${INSTALL} -s'
  INSTALL_STRIP_PROGRAM_ENV=''
else
  _am_dirpart="`echo $install_sh | sed -e 's,//*[[^/]]*$,,'`"
  INSTALL_STRIP_PROGRAM="\${SHELL} \`CDPATH=: && cd $_am_dirpart && pwd\`/install-sh -c -s"
  INSTALL_STRIP_PROGRAM_ENV="STRIPPROG='\$(STRIP)'"
fi
AC_SUBST([STRIP])
AC_SUBST([INSTALL_STRIP_PROGRAM])
AC_SUBST([INSTALL_STRIP_PROGRAM_ENV])])

#AC_DEFUN([AM_PROG_STRIP],
#[# Check for `strip', unless the installer
# has set the STRIP environment variable.
# Note: don't explicitly check for -z "$STRIP" here because
# that will cause problems if AC_CANONICAL_* is AC_REQUIREd after
# this macro, and anyway it doesn't have an effect anyway.
#AC_CHECK_TOOL([STRIP],[strip])
#])

#
# Find some information about the etags program
#
# Sets
#	ETAGS = path to etags
#	ETAGS_INCLUDE_OPTION = option to pass to etags with arg for includes
#

AC_DEFUN([AM_PROG_ETAGS],
[AC_BEFORE([$0], [AM_PROG_ETAGS_WORKS])dnl
AC_CHECK_PROG(ETAGS, etags, etags)
if test -z "$ETAGS"; then
  AC_CHECK_PROG(ETAGS, ctags, ctags -e)
fi
if test -n "$ETAGS"; then
	AM_PROG_ETAGS_WORKS
	if test "$am_cv_prog_etags_works" = yes ; then
		AM_PROG_ETAGS_INCLUDE_OPTION
	else
		AM_MISSING_PROG(ETAGS, etags)
	fi
else
	AM_MISSING_PROG(ETAGS, etags)
fi])


AC_DEFUN([AM_PROG_ETAGS_WORKS],
[AC_CACHE_CHECK([whether ${ETAGS-etags} works], [am_cv_prog_etags_works],
[cat >conftest.c <<EOF
int globalvar;
EOF
if AC_TRY_COMMAND([${ETAGS-etags} -f - conftest.c |egrep ^int\ globalvar\; >&2]); then
	am_cv_prog_etags_works=yes
else
	am_cv_prog_etags_works=no
fi
rm -f conftest.c])])

AC_DEFUN([AM_PROG_ETAGS_INCLUDE_OPTION],
[AC_REQUIRE([AM_PROG_ETAGS_WORKS])dnl
if test "$am_cv_prog_etags_works" = yes ; then
	AC_CACHE_CHECK([for etags include option],
	[am_cv_prog_etags_include_option],
	[cat >conftest.c <<EOF
int globalvar;
EOF
	if AC_TRY_COMMAND([${ETAGS-etags} --etags-include=TAGS.inc -f - conftest.c |egrep ^TAGS.inc,include\$ >&2]); then
		am_cv_prog_etags_include_option=--etags-include=
	elif AC_TRY_COMMAND([${ETAGS-etags} -i TAGS.inc -f - conftest.c |egrep ^TAGS.inc,include\$ >&2]); then
		am_cv_prog_etags_include_option='"-i "'
	else :
		# AC_MSG_ERROR(unfamiliar etags implementation)
	fi
	rm -f conftest.c])
else
	:
fi
ETAGS_INCLUDE_OPTION="$am_cv_prog_etags_include_option"
AC_SUBST(ETAGS_INCLUDE_OPTION)])

# serial 3

# There are a few dirty hacks below to avoid letting `AC_PROG_CC' be
# written in clear, in which case automake, when reading aclocal.m4,
# will think it sees a *use*, and therefore will trigger all it's
# C support machinery.  Also note that it means that autoscan, seeing
# CC etc. in the Makefile, will ask for an AC_PROG_CC use...

# AM_DEPENDENCIES(NAME)
# ---------------------
# See how the compiler implements dependency checking.
# NAME is "CC", "CXX" or "OBJC".
# We try a few techniques and use that to set a single cache variable.
AC_DEFUN([AM_DEPENDENCIES],
[AC_REQUIRE([AM_SET_DEPDIR])dnl
AC_REQUIRE([AM_OUTPUT_DEPENDENCY_COMMANDS])dnl
ifelse([$1], CC,
       [AC_REQUIRE([AC_PROG_][CC])dnl
AC_REQUIRE([AC_PROG_][CPP])
depcc="$CC"
depcpp="$CPP"],
       [$1], CXX, [AC_REQUIRE([AC_PROG_][CXX])dnl
AC_REQUIRE([AC_PROG_][CXXCPP])
depcc="$CXX"
depcpp="$CXXCPP"],
       [$1], OBJC, [am_cv_OBJC_dependencies_compiler_type=gcc],
       [AC_REQUIRE([AC_PROG_][$1])dnl
depcc="$$1"
depcpp=""])

AC_REQUIRE([AM_MAKE_INCLUDE])

AC_CACHE_CHECK([dependency style of $depcc],
               [am_cv_$1_dependencies_compiler_type],
[if test -z "$AMDEP"; then
  # We make a subdir and do the tests there.  Otherwise we can end up
  # making bogus files that we don't know about and never remove.  For
  # instance it was reported that on HP-UX the gcc test will end up
  # making a dummy file named `D' -- because `-MD' means `put the output
  # in D'.
  mkdir confdir
  # Copy depcomp to subdir because otherwise we won't find it if we're
  # using a relative directory.
  cp "$am_depcomp" confdir
  cd confdir

  am_cv_$1_dependencies_compiler_type=none
  for depmode in `sed -n ['s/^#*\([a-zA-Z0-9]*\))$/\1/p'] < "./depcomp"`; do
    # We need to recreate these files for each test, as the compiler may
    # overwrite some of them when testing with obscure command lines.
    # This happens at least with the AIX C compiler.
    echo '#include "conftest.h"' > conftest.c
    echo 'int i;' > conftest.h

    case "$depmode" in
    nosideeffect)
      # after this tag, mechanisms are not by side-effect, so they'll
      # only be used when explicitly requested
      if test "x$enable_dependency_tracking" = xyes; then
	continue
      else
	break
      fi
      ;;
    none) break ;;
    esac
    # We check with `-c' and `-o' for the sake of the "dashmstdout"
    # mode.  It turns out that the SunPro C++ compiler does not properly
    # handle `-M -o', and we need to detect this.
    if depmode="$depmode" \
       source=conftest.c object=conftest.o \
       depfile=conftest.Po tmpdepfile=conftest.TPo \
       $SHELL ./depcomp $depcc -c conftest.c -o conftest.o >/dev/null 2>&1 &&
       grep conftest.h conftest.Po > /dev/null 2>&1; then
      am_cv_$1_dependencies_compiler_type="$depmode"
      break
    fi
  done

  cd ..
  rm -rf confdir
else
  am_cv_$1_dependencies_compiler_type=none
fi
])
$1DEPMODE="depmode=$am_cv_$1_dependencies_compiler_type"
AC_SUBST([$1DEPMODE])
])


# AM_SET_DEPDIR
# -------------
# Choose a directory name for dependency files.
# This macro is AC_REQUIREd in AM_DEPENDENCIES
AC_DEFUN([AM_SET_DEPDIR],
[if test -d .deps || mkdir .deps 2> /dev/null || test -d .deps; then
  DEPDIR=.deps
  # We redirect because .deps might already exist and be populated.
  # In this situation we don't want to see an error.
  rmdir .deps > /dev/null 2>&1
else
  DEPDIR=_deps
fi
AC_SUBST(DEPDIR)
])


# AM_DEP_TRACK
# ------------
AC_DEFUN([AM_DEP_TRACK],
[AC_ARG_ENABLE(dependency-tracking,
[  --disable-dependency-tracking Speeds up one-time builds
  --enable-dependency-tracking  Do not reject slow dependency extractors])
if test "x$enable_dependency_tracking" != xno; then
  am_depcomp="$ac_aux_dir/depcomp"
  AMDEPBACKSLASH='\'
fi
AM_CONDITIONAL([AMDEP], [test "x$enable_dependency_tracking" != xno])
pushdef([subst], defn([AC_SUBST]))
subst(AMDEPBACKSLASH)
popdef([subst])
])

# Generate code to set up dependency tracking.
# This macro should only be invoked once -- use via AC_REQUIRE.
# Usage:
# AM_OUTPUT_DEPENDENCY_COMMANDS

#
# This code is only required when automatic dependency tracking
# is enabled.  FIXME.  This creates each `.P' file that we will
# need in order to bootstrap the dependency handling code.
AC_DEFUN([AM_OUTPUT_DEPENDENCY_COMMANDS],[
AC_OUTPUT_COMMANDS([
test x"$AMDEP" != x"" ||
for mf in $CONFIG_FILES; do
  case "$mf" in
  Makefile) dirpart=.;;
  */Makefile) dirpart=`echo "$mf" | sed -e 's|/[^/]*$||'`;;
  *) continue;;
  esac
  grep '^DEP_FILES *= *[^ #]' < "$mf" > /dev/null || continue
  # Extract the definition of DEP_FILES from the Makefile without
  # running `make'.
  DEPDIR=`sed -n -e '/^DEPDIR = / s///p' < "$mf"`
  test -z "$DEPDIR" && continue
  # When using ansi2knr, U may be empty or an underscore; expand it
  U=`sed -n -e '/^U = / s///p' < "$mf"`
  test -d "$dirpart/$DEPDIR" || mkdir "$dirpart/$DEPDIR"
  # We invoke sed twice because it is the simplest approach to
  # changing $(DEPDIR) to its actual value in the expansion.
  for file in `sed -n -e '
    /^DEP_FILES = .*\\\\$/ {
      s/^DEP_FILES = //
      :loop
	s/\\\\$//
	p
	n
	/\\\\$/ b loop
      p
    }
    /^DEP_FILES = / s/^DEP_FILES = //p' < "$mf" | \
       sed -e 's/\$(DEPDIR)/'"$DEPDIR"'/g' -e 's/\$U/'"$U"'/g'`; do
    # Make sure the directory exists.
    test -f "$dirpart/$file" && continue
    fdir=`echo "$file" | sed -e 's|/[^/]*$||'`
    $ac_aux_dir/mkinstalldirs "$dirpart/$fdir" > /dev/null 2>&1
    # echo "creating $dirpart/$file"
    echo '# dummy' > "$dirpart/$file"
  done
done
], [AMDEP="$AMDEP"
ac_aux_dir="$ac_aux_dir"])])

# AM_MAKE_INCLUDE()
# -----------------
# Check to see how make treats includes.
AC_DEFUN([AM_MAKE_INCLUDE],
[am_make=${MAKE-make}
cat > confinc << 'END'
doit:
	@echo done
END
# If we don't find an include directive, just comment out the code.
AC_MSG_CHECKING([for style of include used by $am_make])
_am_include='#'
_am_quote=
_am_result=none
# First try GNU make style include.
echo "include confinc" > confmf
if test "`$am_make -s -f confmf 2> /dev/null`" = "done"; then
   _am_include=include
   _am_quote=
   _am_result=GNU
fi
# Now try BSD make style include.
if test "$_am_include" = "#"; then
   echo '.include "confinc"' > confmf
   if test "`$am_make -s -f confmf 2> /dev/null`" = "done"; then
      _am_include=.include
      _am_quote='"'
      _am_result=BSD
   fi
fi
AC_SUBST(_am_include)
AC_SUBST(_am_quote)
AC_MSG_RESULT($_am_result)
rm -f confinc confmf
])

# serial 3

# AM_CONDITIONAL(NAME, SHELL-CONDITION)
# -------------------------------------
# Define a conditional.
#
# FIXME: Once using 2.50, use this:
# m4_match([$1], [^TRUE\|FALSE$], [AC_FATAL([$0: invalid condition: $1])])dnl
AC_DEFUN([AM_CONDITIONAL],
[ifelse([$1], [TRUE],
        [errprint(__file__:__line__: [$0: invalid condition: $1
])dnl
m4exit(1)])dnl
ifelse([$1], [FALSE],
       [errprint(__file__:__line__: [$0: invalid condition: $1
])dnl
m4exit(1)])dnl
AC_SUBST([$1_TRUE])
AC_SUBST([$1_FALSE])
if $2; then
  $1_TRUE=
  $1_FALSE='#'
else
  $1_TRUE='#'
  $1_FALSE=
fi])

# Like AC_CONFIG_HEADER, but automatically create stamp file.

# serial 3

# When config.status generates a header, we must update the stamp-h file.
# This file resides in the same directory as the config header
# that is generated.  We must strip everything past the first ":",
# and everything past the last "/".

AC_PREREQ([2.12])

AC_DEFUN([AM_CONFIG_HEADER],
[ifdef([AC_FOREACH],dnl
	 [dnl init our file count if it isn't already
	 m4_ifndef([_AM_Config_Header_Index], m4_define([_AM_Config_Header_Index], [0]))
	 dnl prepare to store our destination file list for use in config.status
	 AC_FOREACH([_AM_File], [$1],
		    [m4_pushdef([_AM_Dest], m4_patsubst(_AM_File, [:.*]))
		    m4_define([_AM_Config_Header_Index], m4_incr(_AM_Config_Header_Index))
		    dnl and add it to the list of files AC keeps track of, along
		    dnl with our hook
		    AC_CONFIG_HEADERS(_AM_File,
dnl COMMANDS, [, INIT-CMDS]
[# update the timestamp
echo timestamp >"AS_ESCAPE(_AM_DIRNAME(]_AM_Dest[))/stamp-h]_AM_Config_Header_Index["
][$2]m4_ifval([$3], [, [$3]]))dnl AC_CONFIG_HEADERS
		    m4_popdef([_AM_Dest])])],dnl
[AC_CONFIG_HEADER([$1])
  AC_OUTPUT_COMMANDS(
   ifelse(patsubst([$1], [[^ ]], []),
	  [],
	  [test -z "$CONFIG_HEADERS" || echo timestamp >dnl
	   patsubst([$1], [^\([^:]*/\)?.*], [\1])stamp-h]),dnl
[am_indx=1
for am_file in $1; do
  case " \$CONFIG_HEADERS " in
  *" \$am_file "*)
    am_dir=\`echo \$am_file |sed 's%:.*%%;s%[^/]*\$%%'\`
    if test -n "\$am_dir"; then
      am_tmpdir=\`echo \$am_dir |sed 's%^\(/*\).*\$%\1%'\`
      for am_subdir in \`echo \$am_dir |sed 's%/% %'\`; do
        am_tmpdir=\$am_tmpdir\$am_subdir/
        if test ! -d \$am_tmpdir; then
          mkdir \$am_tmpdir
        fi
      done
    fi
    echo timestamp > "\$am_dir"stamp-h\$am_indx
    ;;
  esac
  am_indx=\`expr \$am_indx + 1\`
done])
])]) # AM_CONFIG_HEADER

# _AM_DIRNAME(PATH)
# -----------------
# Like AS_DIRNAME, only do it during macro expansion
AC_DEFUN([_AM_DIRNAME],
       [m4_if(m4_regexp([$1], [^.*[^/]//*[^/][^/]*/*$]), -1,
	      m4_if(m4_regexp([$1], [^//\([^/]\|$\)]), -1,
		    m4_if(m4_regexp([$1], [^/.*]), -1,
			  [.],
			  m4_patsubst([$1], [^\(/\).*], [\1])),
		    m4_patsubst([$1], [^\(//\)\([^/].*\|$\)], [\1])),
	      m4_patsubst([$1], [^\(.*[^/]\)//*[^/][^/]*/*$], [\1]))[]dnl
]) # _AM_DIRNAME