find_apr.m4

   1 dnl -------------------------------------------------------- -*- autoconf -*-
   2 dnl Licensed to the Apache Software Foundation (ASF) under one or more
   3 dnl contributor license agreements.  See the NOTICE file distributed with
   4 dnl this work for additional information regarding copyright ownership.
   5 dnl The ASF licenses this file to You under the Apache License, Version 2.0
   6 dnl (the "License"); you may not use this file except in compliance with
   7 dnl the License.  You may obtain a copy of the License at
   8 dnl
   9 dnl     http://www.apache.org/licenses/LICENSE-2.0
  10 dnl
  11 dnl Unless required by applicable law or agreed to in writing, software
  12 dnl distributed under the License is distributed on an "AS IS" BASIS,
  13 dnl WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 dnl See the License for the specific language governing permissions and
  15 dnl limitations under the License.
  16
  17 dnl
  18 dnl find_apr.m4 : locate the APR include files and libraries
  19 dnl
  20 dnl This macro file can be used by applications to find and use the APR
  21 dnl library. It provides a standardized mechanism for using APR. It supports
  22 dnl embedding APR into the application source, or locating an installed
  23 dnl copy of APR.
  24 dnl
  25 dnl APR_FIND_APR(srcdir, builddir, implicit-install-check, acceptable-majors,
  26 dnl              detailed-check)
  27 dnl
  28 dnl   where srcdir is the location of the bundled APR source directory, or
  29 dnl   empty if source is not bundled.
  30 dnl
  31 dnl   where builddir is the location where the bundled APR will will be built,
  32 dnl   or empty if the build will occur in the srcdir.
  33 dnl
  34 dnl   where implicit-install-check set to 1 indicates if there is no
  35 dnl   --with-apr option specified, we will look for installed copies.
  36 dnl
  37 dnl   where acceptable-majors is a space separated list of acceptable major
  38 dnl   version numbers. Often only a single major version will be acceptable.
  39 dnl   If multiple versions are specified, and --with-apr=PREFIX or the
  40 dnl   implicit installed search are used, then the first (leftmost) version
  41 dnl   in the list that is found will be used.  Currently defaults to [0 1].
  42 dnl
  43 dnl   where detailed-check is an M4 macro which sets the apr_acceptable to
  44 dnl   either "yes" or "no". The macro will be invoked for each installed
  45 dnl   copy of APR found, with the apr_config variable set appropriately.
  46 dnl   Only installed copies of APR which are considered acceptable by
  47 dnl   this macro will be considered found. If no installed copies are
  48 dnl   considered acceptable by this macro, apr_found will be set to either
  49 dnl   either "no" or "reconfig".
  50 dnl
  51 dnl Sets the following variables on exit:
  52 dnl
  53 dnl   apr_found : "yes", "no", "reconfig"
  54 dnl
  55 dnl   apr_config : If the apr-config tool exists, this refers to it. If
  56 dnl                apr_found is "reconfig", then the bundled directory
  57 dnl                should be reconfigured *before* using apr_config.
  58 dnl
  59 dnl Note: this macro file assumes that apr-config has been installed; it
  60 dnl       is normally considered a required part of an APR installation.
  61 dnl
  62 dnl If a bundled source directory is available and needs to be (re)configured,
  63 dnl then apr_found is set to "reconfig". The caller should reconfigure the
  64 dnl (passed-in) source directory, placing the result in the build directory,
  65 dnl as appropriate.
  66 dnl
  67 dnl If apr_found is "yes" or "reconfig", then the caller should use the
  68 dnl value of apr_config to fetch any necessary build/link information.
  69 dnl
  70
  71 AC_DEFUN([APR_FIND_APR], [
  72   apr_found="no"
  73
  74   if test "$target_os" = "os2-emx"; then
  75     # Scripts don't pass test -x on OS/2
  76     TEST_X="test -f"
  77   else
  78     TEST_X="test -x"
  79   fi
  80
  81   ifelse([$4], [], [
  82          ifdef(AC_WARNING,AC_WARNING([$0: missing argument 4 (acceptable-majors): Defaulting to APR 0.x then APR 1.x]))
  83          acceptable_majors="0 1"],
  84          [acceptable_majors="$4"])
  85
  86   apr_temp_acceptable_apr_config=""
  87   for apr_temp_major in $acceptable_majors
  88   do
  89     case $apr_temp_major in
  90       0)
  91       apr_temp_acceptable_apr_config="$apr_temp_acceptable_apr_config apr-config"
  92       ;;
  93       *)
  94       apr_temp_acceptable_apr_config="$apr_temp_acceptable_apr_config apr-$apr_temp_major-config"
  95       ;;
  96     esac
  97   done
  98
  99   AC_MSG_CHECKING(for APR)
 100   AC_ARG_WITH(apr,
 101   [  --with-apr=PATH         prefix for installed APR or the full path to
 102                              apr-config],
 103   [
 104     if test "$withval" = "no" || test "$withval" = "yes"; then
 105       AC_MSG_ERROR([--with-apr requires a directory or file to be provided])
 106     fi
 107
 108     for apr_temp_apr_config_file in $apr_temp_acceptable_apr_config
 109     do
 110       for lookdir in "$withval/bin" "$withval"
 111       do
 112         if $TEST_X "$lookdir/$apr_temp_apr_config_file"; then
 113           apr_config="$lookdir/$apr_temp_apr_config_file"
 114           ifelse([$5], [], [], [
 115           apr_acceptable="yes"
 116           $5
 117           if test "$apr_acceptable" != "yes"; then
 118             AC_MSG_WARN([Found APR in $apr_config, but we think it is considered unacceptable])
 119             continue
 120           fi])
 121           apr_found="yes"
 122           break 2
 123         fi
 124       done
 125     done
 126
 127     if test "$apr_found" != "yes" && $TEST_X "$withval" && $withval --help > /dev/null 2>&1 ; then
 128       apr_config="$withval"
 129       ifelse([$5], [], [apr_found="yes"], [
 130           apr_acceptable="yes"
 131           $5
 132           if test "$apr_acceptable" = "yes"; then
 133                 apr_found="yes"
 134           fi])
 135     fi
 136
 137     dnl if --with-apr is used, it is a fatal error for its argument
 138     dnl to be invalid
 139     if test "$apr_found" != "yes"; then
 140       AC_MSG_ERROR([the --with-apr parameter is incorrect. It must specify an install prefix, a build directory, or an apr-config file.])
 141     fi
 142   ],[
 143     dnl If we allow installed copies, check those before using bundled copy.
 144     if test -n "$3" && test "$3" = "1"; then
 145       for apr_temp_apr_config_file in $apr_temp_acceptable_apr_config
 146       do
 147         if $apr_temp_apr_config_file --help > /dev/null 2>&1 ; then
 148           apr_config="$apr_temp_apr_config_file"
 149           ifelse([$5], [], [], [
 150           apr_acceptable="yes"
 151           $5
 152           if test "$apr_acceptable" != "yes"; then
 153             AC_MSG_WARN([skipped APR at $apr_config, version not acceptable])
 154             continue
 155           fi])
 156           apr_found="yes"
 157           break
 158         else
 159           dnl look in some standard places
 160           for lookdir in /usr /usr/local /usr/local/apr /opt/apr; do
 161             if $TEST_X "$lookdir/bin/$apr_temp_apr_config_file"; then
 162               apr_config="$lookdir/bin/$apr_temp_apr_config_file"
 163               ifelse([$5], [], [], [
 164               apr_acceptable="yes"
 165               $5
 166               if test "$apr_acceptable" != "yes"; then
 167                 AC_MSG_WARN([skipped APR at $apr_config, version not acceptable])
 168                 continue
 169               fi])
 170               apr_found="yes"
 171               break 2
 172             fi
 173           done
 174         fi
 175       done
 176     fi
 177     dnl if we have not found anything yet and have bundled source, use that
 178     if test "$apr_found" = "no" && test -d "$1"; then
 179       apr_temp_abs_srcdir="`cd $1 && pwd`"
 180       apr_found="reconfig"
 181       apr_bundled_major="`sed -n '/#define.*APR_MAJOR_VERSION/s/^[^0-9]*\([0-9]*\).*$/\1/p' \"$1/include/apr_version.h\"`"
 182       case $apr_bundled_major in
 183         "")
 184           AC_MSG_ERROR([failed to find major version of bundled APR])
 185         ;;
 186         0)
 187           apr_temp_apr_config_file="apr-config"
 188         ;;
 189         *)
 190           apr_temp_apr_config_file="apr-$apr_bundled_major-config"
 191         ;;
 192       esac
 193       if test -n "$2"; then
 194         apr_config="$2/$apr_temp_apr_config_file"
 195       else
 196         apr_config="$1/$apr_temp_apr_config_file"
 197       fi
 198     fi
 199   ])
 200
 201   AC_MSG_RESULT($apr_found)
 202 ])