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_apr.m4 : locate the APR include files and libraries

dnl

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

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

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

dnl copy of APR.

dnl

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

dnl              detailed-check)

dnl

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

dnl   empty if source is not bundled.

dnl

dnl   where builddir is the location where the bundled APR will 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 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=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 apr_acceptable to

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

dnl   copy of APR found, with the apr_config variable set appropriately.

dnl   Only installed copies of APR which are considered acceptable by

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

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

dnl   either "no" or "reconfig".

dnl

dnl Sets the following variables on exit:

dnl

dnl   apr_found : "yes", "no", "reconfig"

dnl

dnl   apr_config : If the apr-config tool exists, this refers to it. If

dnl                apr_found is "reconfig", then the bundled directory

dnl                should be reconfigured *before* using apr_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 If a bundled source directory is available and needs to be (re)configured,

dnl then apr_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 apr_found is "yes" or "reconfig", then the caller should use the

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

dnl

AC_DEFUN([APR_FIND_APR], [

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

         acceptable_majors="0 1"],

         [acceptable_majors="$4"])

  apr_temp_acceptable_apr_config=""

  for apr_temp_major in $acceptable_majors

  do

    case $apr_temp_major in

      0)

      apr_temp_acceptable_apr_config="$apr_temp_acceptable_apr_config apr-config"

      ;;

      *)

      apr_temp_acceptable_apr_config="$apr_temp_acceptable_apr_config apr-$apr_temp_major-config"

      ;;

    esac

  done

  AC_MSG_CHECKING(for APR)

  AC_ARG_WITH(apr,

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

                             apr-config],

  [

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

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

    fi

    for apr_temp_apr_config_file in $apr_temp_acceptable_apr_config

    do

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

      do

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

          apr_config="$lookdir/$apr_temp_apr_config_file"

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

          apr_acceptable="yes"

          $5

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

            AC_MSG_WARN([Found APR in $apr_config, but we think it is considered unacceptable])

            continue

          fi])

          apr_found="yes"

          break 2

        fi

      done

    done

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

      apr_config="$withval"

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

          apr_acceptable="yes"

          $5

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

                apr_found="yes"

          fi])

    fi

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

    dnl to be invalid

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

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

    fi

  ],[

    dnl If we allow installed copies, check those before using bundled copy.

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

      for apr_temp_apr_config_file in $apr_temp_acceptable_apr_config

      do

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

          apr_config="$apr_temp_apr_config_file"

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

          apr_acceptable="yes"

          $5

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

            AC_MSG_WARN([skipped APR at $apr_config, version not acceptable])

            continue

          fi])

          apr_found="yes"

          break

        else

          dnl look in some standard places

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

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

              apr_config="$lookdir/bin/$apr_temp_apr_config_file"

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

              apr_acceptable="yes"

              $5

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

                AC_MSG_WARN([skipped APR at $apr_config, version not acceptable])

                continue

              fi])

              apr_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 "$apr_found" = "no" && test -d "$1"; then

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

      apr_found="reconfig"

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

      case $apr_bundled_major in

        "")

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

        ;;

        0)

          apr_temp_apr_config_file="apr-config"

        ;;

        *)

          apr_temp_apr_config_file="apr-$apr_bundled_major-config"

        ;;

      esac

      if test -n "$2"; then

        apr_config="$2/$apr_temp_apr_config_file"

      else

        apr_config="$1/$apr_temp_apr_config_file"

      fi

    fi

  ])

  AC_MSG_RESULT($apr_found)

])