buildconf: check in APR[-util] m4 macros

Suggestion by wrowe. These files haven't changed in years; since we need
them anyway, check them in directly. buildconf will still copy over the
latest versions during setup, and SVN will tell us if there are any
changes.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/trunk-buildconf-noapr@1795928 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 211 insertions, 0 deletions

diff --git a/build/find_apu.m4 b/build/find_apu.m4
new file mode 100644
index 0000000000..7937e005a7
--- /dev/null
+++ b/build/find_apu.m4
@@ -0,0 +1,211 @@
+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)
+])