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#!/bin/sh
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
#
# buildconf: Build the support scripts needed to compile from a
#            checked-out version of the source code.

# version check for AC_PROG_CC_C99
ac_version=`${AUTOCONF:-autoconf} --version 2>/dev/null|sed -e 's/^[^0-9]*//;s/[a-z]* *$//;q'`
case "$ac_version" in
# versions older than 2.50 are denied by AC_PREREQ
2.5*)
    echo WARNING: You are using an outdated version of autoconf.
    echo WARNING: This may lead to less than optimal performance of httpd.
    echo WARNING: You should use autoconf 2.60 or newer.
    sleep 1
    ;;
esac

# set a couple of defaults for where we should be looking for our support libs.
# can be overridden with --with-apr=[dir] and --with-apr-util=[dir]

apr_src_dir="srclib/apr ../apr"
apu_src_dir=""

while test $# -gt 0 
do
    # Normalize
    case "$1" in
    -*=*) optarg=`echo "$1" | sed 's/[-_a-zA-Z0-9]*=//'` ;;
    *) optarg= ;;
    esac

    case "$1" in
    --with-apr=*)
        apr_src_dir=$optarg
        ;;

    --with-apr-util=*)
        apu_src_dir=$optarg
        ;;

    -h|--help)
        cat <<EOF
buildconf: generates the files needed to configure httpd.

Usage: $0 [OPTION]...

Configuration:
  -h, --help               display this help and exit

  --with-apr=SRCDIR        define a space-separated list of directories to
                           search for the APR source code. If, instead of a
                           directory, an apr-config executable name is passed,
                           APR-Config Mode is enabled (see below). Defaults to
                           "srclib/apr ../apr"
  --with-apr-util=SRCDIR   define a space-separated list of directories to
                           search for the APR-util source code. Defaults to the
                           same location as the --with-apr SRCDIR, but with
                           "apr" replaced with "apr-util" or "aprutil". Ignored
                           in APR-Config Mode.

APR-Config Mode:

  When passing an apr-config executable to --with-apr, buildconf will attempt to
  copy build scripts from various installed locations on your system instead of
  an APR source tree. This allows you to configure httpd from source without
  also requiring you to download the APR and/or APR-util sources.

  For example:

      ./buildconf --with-apr=apr-1-config

  For this functionality to work reliably, you must have automake >= 1.12 and be
  using a distribution that includes both find_apr.m4 and find_apu.m4 in the
  --installbuilddir pointed to by apr-config.

Environment variables used by buildconf:
  AUTOCONF           autoconf executable name [autoconf]
  AUTOMAKE           automake executable name [automake]
  AUTOHEADER         autoheader executable name [autoheader]
EOF
        exit
        ;;

    *)
        echo "unknown option $1 (try --help for usage)"
        exit 1
        ;;
    esac

    shift
done

#
# Check to be sure that we have the srclib dependencies checked-out, or that a
# working apr-config installation has been specified.
#

should_exit=0
apr_config=         # path to apr-config (empty if using a source directory)
apr_found=0
apu_found=0
apr_major_version=2

for dir in $apr_src_dir
do
    if [ -f "${dir}/build/apr_common.m4" ]; then
        echo "found apr source: ${dir}"
        apr_src_dir=$dir
        apr_found=1
        break
    elif which "${dir}" >/dev/null 2>&1; then
        # We're using apr-config. Do a sanity check.
        apr_config=`which "${dir}"`
        echo "testing apr-config executable: ${apr_config}"

        version=`"${apr_config}" --version`
        version=`echo "${version}" | sed -n '/^[0-9][0-9]*\.[0-9][0-9]*\.[0-9][0-9]*$/p'`

        if [ -z "${version}" ]; then
            echo "apr-config gave us an invalid --version"
            apr_config=
            continue
        fi

        echo "using apr-config version ${version}"
        apr_major_version=${version} # we'll make a real "major version" later
        apr_src_dir=`"${apr_config}" --installbuilddir`
        apr_found=1
        break
    fi
done

if [ $apr_found -lt 1 ]; then
    echo ""
    echo "You don't have a copy of the apr source in srclib/apr. "
    echo "Please get the source using the following instructions," 
    echo "or specify the location of the source with " 
    echo "--with-apr=[path to apr] :"
    echo ""
    echo "   svn co http://svn.apache.org/repos/asf/apr/apr/trunk srclib/apr"
    echo ""
    should_exit=1
elif [ -n "${apr_config}" ]; then
    apr_major_version=`echo "${apr_major_version}" | sed 's/\..*//'`
else
    apr_major_version=`grep "#define APR_MAJOR_VERSION" \
                      $apr_src_dir/include/apr_version.h | sed 's/[^0-9]//g'`
fi

# Find APR-util. Note: if we're using apr-config, we can completely skip this,
# even if APR is version 1. That's because we only end up caring about
# find_apu.m4, which is not actually installed in the standard APR-util
# distribution to begin with.
if [ -z "${apr_config}" -a $apr_major_version -lt 2 ] ; then
    if test -z "$apu_src_dir"; then
        apu_src_dir=`echo $apr_src_dir | sed -e 's#/apr#/apr-util#g;'`
        apu_src_dir="$apu_src_dir `echo $apr_src_dir | sed -e 's#/apr#/aprutil#;g'`"
        apu_src_dir="$apu_src_dir srclib/apr-util ../apr-util"
    fi

    for dir in $apu_src_dir
    do
        if [ -f "${dir}/Makefile.in" ]; then
            echo "found apr-util source: ${dir}"
            apu_src_dir=$dir
            apu_found=1
            break
        fi
    done

    if [ $apu_found -lt 1 ]; then
        echo ""
        echo "You don't have a copy of the apr-util source in srclib/apr-util. "
        echo "Please get one the source using the following instructions, "
        echo "or specify the location of the source with "
        echo "--with-apr-util=[path to apr-util]:"
        echo ""
        echo "   svn co http://svn.apache.org/repos/asf/apr/apr-util/branches/1.5.x srclib/apr-util"
        echo ""
        should_exit=1
    fi
fi

if [ $should_exit -gt 0 ]; then
    exit 1
fi

# These are temporary until Roy finishes the other build changes
#
touch .deps
rm -f aclocal.m4
rm -f generated_lists

# Remove autoconf 2.5x cache directories
rm -rf autom4te*.cache

case "`uname`" in
*BSD/OS*)
    ./build/bsd_makefile;;
esac
#
# end temporary stuff

apr_configure="$apr_src_dir/configure"
if [ $apr_major_version -lt 2 ] ; then
    aprutil_configure="$apu_src_dir/configure"
fi
config_h_in="include/ap_config_auto.h.in"

cross_compile_warning="warning: AC_TRY_RUN called without default to allow cross compiling"

if [ "$apr_src_dir" = "srclib/apr" ]; then
    echo rebuilding $apr_configure
    (cd srclib/apr && ./buildconf) || {
        echo "./buildconf failed for apr"
        exit 1
    }
    rm -f srclib/apr/apr.spec
fi

apr_src_dir=`cd $apr_src_dir && pwd` 

if [ $apr_major_version -lt 2 ] ; then
    if [ "$apu_src_dir" = "srclib/apr-util" ]; then
        echo rebuilding $aprutil_configure
        (cd srclib/apr-util && ./buildconf --with-apr=$apr_src_dir) || {
            echo "./buildconf failed for apr-util" 
            exit 1
        }
        rm -f srclib/apr-util/apr-util.spec
    fi

    apu_src_dir=`cd $apu_src_dir && pwd`
fi

echo copying build files
if [ -n "${apr_config}" ]; then
    # If we're using apr-config, we switch things up a little bit:
    # - use automake's config.* scripts instead of APR's
    # - use the included PrintPath instead of copying from APR
    # - assume find_apu.m4 is also in APR's --installbuilddir

    # Figure out where to copy config.* from.
    automake=${AUTOMAKE:-automake}
    am_libdir=`"${automake}" --print-libdir`
    cp "${am_libdir}/config.guess" "${am_libdir}/config.sub" build

    # Remember that in this case, $apr_src_dir points to the build directory.
    cp "$apr_src_dir/apr_common.m4" "$apr_src_dir/find_apr.m4" build
    if [ $apr_major_version -lt 2 ] ; then
        cp "$apr_src_dir/find_apu.m4" build
    fi
else
    cp $apr_src_dir/build/config.guess $apr_src_dir/build/config.sub \
       $apr_src_dir/build/PrintPath $apr_src_dir/build/apr_common.m4 \
       $apr_src_dir/build/find_apr.m4 build
    if [ $apr_major_version -lt 2 ] ; then
        cp $apu_src_dir/build/find_apu.m4 build
    fi
fi

# Remove any libtool files so one can switch between libtool 1.3
# and libtool 1.4 by simply rerunning the buildconf script.
(cd build ; rm -f ltconfig ltmain.sh)

if [ -z "${apr_config}" ]; then
    # Optionally copy libtool-1.3.x files
    if [ -f $apr_src_dir/build/ltconfig ]; then
        cp $apr_src_dir/build/ltconfig build
    fi
    if [ -f $apr_src_dir/build/ltmain.sh ]; then
        cp $apr_src_dir/build/ltmain.sh build
    fi
fi

echo rebuilding $config_h_in
rm -f $config_h_in
${AUTOHEADER:-autoheader} 2>&1 | grep -v "$cross_compile_warning"

echo rebuilding configure
rm -f config.cache
${AUTOCONF:-autoconf} 2>&1 | grep -v "$cross_compile_warning"

# Remove autoconf 2.5x cache directories
rm -rf autom4te*.cache

if [ -f `which cut` ]; then
  echo rebuilding rpm spec file
  ( VMMN=`build/get-version.sh mmn include/ap_mmn.h MODULE_MAGIC_NUMBER`
    EPOCH=`build/get-version.sh epoch include/ap_release.h AP_SERVER`
    REVISION=`build/get-version.sh all include/ap_release.h AP_SERVER`
    VERSION=`echo $REVISION | cut -d- -s -f1`
    RELEASE=`echo $REVISION | cut -d- -s -f2`
    if [ "x$VERSION" = "x" ]; then
      VERSION=$REVISION
      RELEASE=1
    fi
    cat ./build/rpm/httpd.spec.in | \
    sed -e "s/APACHE_VERSION/$VERSION/" \
        -e "s/APACHE_RELEASE/$RELEASE/" \
        -e "s/APACHE_MMN/$VMMN/" \
        -e "s/APACHE_EPOCH/$EPOCH/" \
    > httpd.spec )
fi

# ensure that the ap_expr expression parser sources are never regenerated
# when running make
echo fixing timestamps for ap_expr sources
cd server
touch util_expr_parse.y util_expr_scan.l
sleep 1
touch util_expr_parse.c util_expr_parse.h util_expr_scan.c
cd ..

exit 0