dnl -------------------------------------------------------- -*- autoconf -*-

dnl Licensed to the Apache Software Foundation (ASF) under one or more

dnl contributor license agreements.  See the NOTICE file distributed with

dnl this work for additional information regarding copyright ownership.

dnl The ASF licenses this file to You under the Apache License, Version 2.0

dnl (the "License"); you may not use this file except in compliance with

dnl 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, software

dnl distributed under the License is distributed on an "AS IS" BASIS,

dnl WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

dnl See the License for the specific language governing permissions and

dnl limitations under the License.

dnl

dnl find_apu.m4 : locate the APR-util (APU) include files and libraries

dnl

dnl This macro file can be used by applications to find and use the APU

dnl library. It provides a standardized mechanism for using APU. It supports

dnl embedding APU into the application source, or locating an installed

dnl copy of APU.

dnl

dnl APR_FIND_APU(srcdir, builddir, implicit-install-check, acceptable-majors,

dnl              detailed-check)

dnl

dnl   where srcdir is the location of the bundled APU source directory, or

dnl   empty if source is not bundled.

dnl

dnl   where builddir is the location where the bundled APU will be built,

dnl   or empty if the build will occur in the srcdir.

dnl

dnl   where implicit-install-check set to 1 indicates if there is no

dnl   --with-apr-util option specified, we will look for installed copies.

dnl

dnl   where acceptable-majors is a space separated list of acceptable major

dnl   version numbers. Often only a single major version will be acceptable.

dnl   If multiple versions are specified, and --with-apr-util=PREFIX or the

dnl   implicit installed search are used, then the first (leftmost) version

dnl   in the list that is found will be used.  Currently defaults to [0 1].

dnl

dnl   where detailed-check is an M4 macro which sets the apu_acceptable to

dnl   either "yes" or "no". The macro will be invoked for each installed

dnl   copy of APU found, with the apu_config variable set appropriately.

dnl   Only installed copies of APU which are considered acceptable by

dnl   this macro will be considered found. If no installed copies are

dnl   considered acceptable by this macro, apu_found will be set to either

dnl   either "no" or "reconfig".

dnl

dnl Sets the following variables on exit:

dnl

dnl   apu_found : "yes", "no", "reconfig"

dnl

dnl   apu_config : If the apu-config tool exists, this refers to it.  If

dnl                apu_found is "reconfig", then the bundled directory

dnl                should be reconfigured *before* using apu_config.

dnl

dnl Note: this macro file assumes that apr-config has been installed; it

dnl       is normally considered a required part of an APR installation.

dnl

dnl Note: At this time, we cannot find *both* a source dir and a build dir.

dnl       If both are available, the build directory should be passed to

dnl       the --with-apr-util switch.

dnl

dnl Note: the installation layout is presumed to follow the standard

dnl       PREFIX/lib and PREFIX/include pattern. If the APU config file

dnl       is available (and can be found), then non-standard layouts are

dnl       possible, since it will be described in the config file.

dnl

dnl If a bundled source directory is available and needs to be (re)configured,

dnl then apu_found is set to "reconfig". The caller should reconfigure the

dnl (passed-in) source directory, placing the result in the build directory,

dnl as appropriate.

dnl

dnl If apu_found is "yes" or "reconfig", then the caller should use the

dnl value of apu_config to fetch any necessary build/link information.

dnl

AC_DEFUN([APR_FIND_APU], [

  apu_found="no"

  if test "$target_os" = "os2-emx"; then

    # Scripts don't pass test -x on OS/2

    TEST_X="test -f"

  else

    TEST_X="test -x"

  fi

  ifelse([$4], [],

  [

    ifdef(AC_WARNING,([$0: missing argument 4 (acceptable-majors): Defaulting to APU 0.x then APU 1.x]))

    acceptable_majors="0 1"

  ], [acceptable_majors="$4"])

  apu_temp_acceptable_apu_config=""

  for apu_temp_major in $acceptable_majors

  do

    case $apu_temp_major in

      0)

      apu_temp_acceptable_apu_config="$apu_temp_acceptable_apu_config apu-config"

      ;;

      *)

      apu_temp_acceptable_apu_config="$apu_temp_acceptable_apu_config apu-$apu_temp_major-config"

      ;;

    esac

  done

  AC_MSG_CHECKING(for APR-util)

  AC_ARG_WITH(apr-util,

  [  --with-apr-util=PATH    prefix for installed APU or the full path to 

                             apu-config],

  [

    if test "$withval" = "no" || test "$withval" = "yes"; then

      AC_MSG_ERROR([--with-apr-util requires a directory or file to be provided])

    fi

    for apu_temp_apu_config_file in $apu_temp_acceptable_apu_config

    do

      for lookdir in "$withval/bin" "$withval"

      do

        if $TEST_X "$lookdir/$apu_temp_apu_config_file"; then

          apu_config="$lookdir/$apu_temp_apu_config_file"

          ifelse([$5], [], [], [

          apu_acceptable="yes"

          $5

          if test "$apu_acceptable" != "yes"; then

            AC_MSG_WARN([Found APU in $apu_config, but it is considered unacceptable])

            continue

          fi])

          apu_found="yes"

          break 2

        fi

      done

    done

    if test "$apu_found" != "yes" && $TEST_X "$withval" && $withval --help > /dev/null 2>&1 ; then

      apu_config="$withval"

      ifelse([$5], [], [apu_found="yes"], [

          apu_acceptable="yes"

          $5

          if test "$apu_acceptable" = "yes"; then

                apu_found="yes"

          fi])

    fi

    dnl if --with-apr-util is used, it is a fatal error for its argument

    dnl to be invalid

    if test "$apu_found" != "yes"; then

      AC_MSG_ERROR([the --with-apr-util parameter is incorrect. It must specify an install prefix, a build directory, or an apu-config file.])

    fi

  ],[

    if test -n "$3" && test "$3" = "1"; then

      for apu_temp_apu_config_file in $apu_temp_acceptable_apu_config

      do

        if $apu_temp_apu_config_file --help > /dev/null 2>&1 ; then

          apu_config="$apu_temp_apu_config_file" 

          ifelse([$5], [], [], [

          apu_acceptable="yes"

          $5

          if test "$apu_acceptable" != "yes"; then

            AC_MSG_WARN([skipped APR-util at $apu_config, version not acceptable])

            continue

          fi])

          apu_found="yes"

          break

        else

          dnl look in some standard places (apparently not in builtin/default)

          for lookdir in /usr /usr/local /usr/local/apr /opt/apr; do

            if $TEST_X "$lookdir/bin/$apu_temp_apu_config_file"; then

              apu_config="$lookdir/bin/$apu_temp_apu_config_file"

              ifelse([$5], [], [], [

              apu_acceptable="yes"

              $5

              if test "$apu_acceptable" != "yes"; then

                AC_MSG_WARN([skipped APR-util at $apu_config, version not acceptable])

                continue

              fi])

              apu_found="yes"

              break 2

            fi

          done

        fi

      done

    fi

    dnl if we have not found anything yet and have bundled source, use that

    if test "$apu_found" = "no" && test -d "$1"; then

      apu_temp_abs_srcdir="`cd \"$1\" && pwd`"

      apu_found="reconfig"

      apu_bundled_major="`sed -n '/#define.*APU_MAJOR_VERSION/s/^[^0-9]*\([0-9]*\).*$/\1/p' \"$1/include/apu_version.h\"`"

      case $apu_bundled_major in

        "")

          AC_MSG_ERROR([failed to find major version of bundled APU])

        ;;

        0)

          apu_temp_apu_config_file="apu-config"

        ;;

        *)

          apu_temp_apu_config_file="apu-$apu_bundled_major-config"

        ;;

      esac

      if test -n "$2"; then

        apu_config="$2/$apu_temp_apu_config_file"

      else

        apu_config="$1/$apu_temp_apu_config_file"

      fi

    fi

  ])

  AC_MSG_RESULT($apu_found)

])