dnl ===================================================================
dnl   Licensed to the Apache Software Foundation (ASF) under one
dnl   or more contributor license agreements.  See the NOTICE file
dnl   distributed with this work for additional information
dnl   regarding copyright ownership.  The ASF licenses this file
dnl   to you under the Apache License, Version 2.0 (the
dnl   "License"); you may not use this file except in compliance
dnl   with the License.  You may obtain a copy of the License at
dnl
dnl     http://www.apache.org/licenses/LICENSE-2.0
dnl
dnl   Unless required by applicable law or agreed to in writing,
dnl   software distributed under the License is distributed on an
dnl   "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
dnl   KIND, either express or implied.  See the License for the
dnl   specific language governing permissions and limitations
dnl   under the License.
dnl ===================================================================
dnl
dnl  SVN_LIB_APRUTIL(wanted_regex, alt_wanted_regex)
dnl
dnl  'wanted_regex' and 'alt_wanted_regex are regular expressions 
dnl  that the aprutil version string must match.
dnl
dnl  Check configure options and assign variables related to
dnl  the Apache Portable Runtime Utilities (APRUTIL) library.
dnl
dnl  If there is an apr-util source directory, there *must* be a
dnl  corresponding apr source directory.  APRUTIL's build system
dnl  is too tied in with apr.  (You can't use an installed APR and
dnl  a source APR-util.)
dnl


AC_DEFUN(SVN_LIB_APRUTIL,
[
  APRUTIL_WANTED_REGEXES="$1"

  AC_MSG_NOTICE([Apache Portable Runtime Utility (APRUTIL) library configuration])

  APR_FIND_APU("", "", 1, [1 0])

  if test $apu_found = "no"; then
    AC_MSG_WARN([APRUTIL not found])
    SVN_DOWNLOAD_APRUTIL
  fi

  if test $apu_found = "reconfig"; then
    AC_MSG_ERROR([Unexpected APRUTIL reconfig])
  fi

  dnl check APRUTIL version number against regex  

  AC_MSG_CHECKING([APRUTIL version])    
  apu_version="`$apu_config --version`"
  if test $? -ne 0; then
    # This is a hack as suggested by Ben Collins-Sussman.  It can be
    # removed after apache 2.0.44 has been released.  (The apu-config
    # shipped in 2.0.43 contains a correct version number, but
    # stupidly doesn't understand the --version switch.)
    apu_version=`grep "APRUTIL_DOTTED_VERSION=" $(which $apu_config) | tr -d "APRUTIL_DOTTED_VERSION="| tr -d '"'`
    #AC_MSG_ERROR([
    #    apu-config --version failed.
    #    Your apu-config doesn't support the --version switch, please upgrade
    #    to APR-UTIL more recent than 2002-Nov-05.])
  fi
  AC_MSG_RESULT([$apu_version])

  APU_WANTED_REGEX_MATCH=0
  for apu_wanted_regex in $APRUTIL_WANTED_REGEXES; do
    if test `expr $apu_version : $apu_wanted_regex` -ne 0; then
      APU_WANTED_REGEX_MATCH=1
      break
    fi
  done

  if test $APU_WANTED_REGEX_MATCH -eq 0; then
    echo "wanted regexes are $APRUTIL_WANTED_REGEXES"
    AC_MSG_ERROR([invalid APRUTIL version found])
  fi

  dnl Get libraries and thread flags from APRUTIL ---------------------

  apu_ldflags="`$apu_config --ldflags`"
  if test $? -ne 0; then
    AC_MSG_ERROR([apu-config --ldflags failed])
  fi
  LDFLAGS="$LDFLAGS `SVN_REMOVE_STANDARD_LIB_DIRS($apu_ldflags)`"

  SVN_APRUTIL_INCLUDES="`$apu_config --includes`"
  if test $? -ne 0; then
    AC_MSG_ERROR([apu-config --includes failed])
  fi

  if test "$enable_all_static" = "yes"; then
    SVN_APRUTIL_LIBS="`$apu_config --link-ld --libs`"
    if test $? -ne 0; then
      AC_MSG_ERROR([apu-config --link-ld --libs failed])
    fi
  else
    SVN_APRUTIL_LIBS="`$apu_config --link-ld`"
    if test $? -ne 0; then
      AC_MSG_ERROR([apu-config --link-ld failed])
    fi
  fi
  SVN_APRUTIL_LIBS="`SVN_REMOVE_STANDARD_LIB_DIRS($SVN_APRUTIL_LIBS)`"

  AC_SUBST(SVN_APRUTIL_INCLUDES)
  AC_SUBST(SVN_APRUTIL_CONFIG, ["$apu_config"])
  AC_SUBST(SVN_APRUTIL_LIBS)

  dnl What version of Expat are we using? -----------------
  SVN_HAVE_OLD_EXPAT="`$apu_config --old-expat`"
  if test "$SVN_HAVE_OLD_EXPAT" = "yes"; then
    AC_DEFINE(SVN_HAVE_OLD_EXPAT, 1, [Defined if Expat 1.0 or 1.1 was found])
  fi
])

dnl SVN_DOWNLOAD_APRUTIL()
dnl no apr-util found, print out a message telling the user what to do
AC_DEFUN(SVN_DOWNLOAD_APRUTIL,
[
  echo "The Apache Portable Runtime Utility (APRUTIL) library cannot be found."
  echo "Install APRUTIL on this system and configure Subversion with the"
  echo " appropriate --with-apr-util option."
  echo ""
  AC_MSG_ERROR([no suitable APRUTIL found])
])