#!/bin/sh

#--------------------------------------------------------------------------

# die prints argument string to stdout and exits this shell script.

#

die(){

  echo "buildconf: $@"

  exit 1

}

#--------------------------------------------------------------------------

# findtool works as 'which' but we use a different name to make it more

# obvious we aren't using 'which'! ;-)

#

findtool(){

  file="$1"

  if { echo "$file" | grep "/" >/dev/null 2>&1; } then

    # when file is given with a path check it first

    if test -f "$file"; then

      echo "$file"

      return

    fi

  fi

  old_IFS=$IFS; IFS=':'

  for path in $PATH

  do

    IFS=$old_IFS

    # echo "checks for $file in $path" >&2

    if test -f "$path/$file"; then

      echo "$path/$file"

      return

    fi

  done

  IFS=$old_IFS

}

#--------------------------------------------------------------------------

# removethis() removes all files and subdirectories with the given name,

# inside and below the current subdirectory at invocation time.

#

removethis(){

  if test "$#" = "1"; then

    find . -depth -name $1 -print > buildconf.tmp.$$

    while read fdname

    do

      if test -f "$fdname"; then

        rm -f "$fdname"

      elif test -d "$fdname"; then

        rm -f -r "$fdname"

      fi

    done < buildconf.tmp.$$

    rm -f buildconf.tmp.$$

  fi

}

#--------------------------------------------------------------------------

# Ensure that buildconf runs from the subdirectory where configure.ac lives

#

if test ! -f configure.ac ||

  test ! -f ares_init.c ||

  test ! -f m4/cares-functions.m4; then

  echo "Can not run buildconf from outside of c-ares source subdirectory!"

  echo "Change to the subdirectory where buildconf is found, and try again."

  exit 1

fi

#--------------------------------------------------------------------------

# GNU libtool preliminary check

#

want_lt_major=1

want_lt_minor=4

want_lt_patch=2

want_lt_version=1.4.2

# This approach that tries 'glibtoolize first is intended for systems that

# have GNU libtool named as 'glibtoolize' and libtoolize not being GNU's.

libtoolize=`findtool glibtoolize 2>/dev/null`

if test ! -x "$libtoolize"; then

  libtoolize=`findtool ${LIBTOOLIZE:-libtoolize}`

fi

if test -z "$libtoolize"; then

  echo "buildconf: libtoolize not found."

  echo "    You need GNU libtoolize $want_lt_version or newer installed."

  exit 1

fi

lt_pver=`$libtoolize --version 2>/dev/null|head -n 1`

lt_qver=`echo $lt_pver|sed -e "s/([^)]*)//g" -e "s/^[^0-9]*//g"`

lt_version=`echo $lt_qver|sed -e "s/[- ].*//" -e "s/\([a-z]*\)$//"`

if test -z "$lt_version"; then

  echo "buildconf: libtoolize not found."

  echo "    You need GNU libtoolize $want_lt_version or newer installed."

  exit 1

fi

old_IFS=$IFS; IFS='.'; set $lt_version; IFS=$old_IFS

lt_major=$1

lt_minor=$2

lt_patch=$3

if test -z "$lt_major"; then

  lt_status="bad"

elif test "$lt_major" -gt "$want_lt_major"; then

  lt_status="good"

elif test "$lt_major" -lt "$want_lt_major"; then

  lt_status="bad"

elif test -z "$lt_minor"; then

  lt_status="bad"

elif test "$lt_minor" -gt "$want_lt_minor"; then

  lt_status="good"

elif test "$lt_minor" -lt "$want_lt_minor"; then

  lt_status="bad"

elif test -z "$lt_patch"; then

  lt_status="bad"

elif test "$lt_patch" -gt "$want_lt_patch"; then

  lt_status="good"

elif test "$lt_patch" -lt "$want_lt_patch"; then

  lt_status="bad"

else

  lt_status="good"

fi

if test "$lt_status" != "good"; then

  echo "buildconf: libtoolize version $lt_version found."

  echo "    You need GNU libtoolize $want_lt_version or newer installed."

  exit 1

fi

#--------------------------------------------------------------------------

# perl check

#

PERL=`findtool ${PERL:-perl}`

if test -z "$PERL"; then

  echo "buildconf: perl not found"

  exit 1

fi

#--------------------------------------------------------------------------

# Remove files generated on previous buildconf/configure run.

#

for fname in .deps \

    .libs \

    *.la \

    *.lo \

    *.a \

    *.o \

    Makefile \

    Makefile.in \

    aclocal.m4 \

    aclocal.m4.bak \

    ares_build.h \

    ares_config.h \

    ares_config.h.in \

    autom4te.cache \

    compile \

    config.guess \

    config.log \

    config.lt \

    config.status \

    config.sub \

    configure \

    depcomp \

    libcares.pc \

    libtool \

    libtool.m4 \

    libtool.m4.tmp \

    ltmain.sh \

    ltoptions.m4 \

    ltsugar.m4 \

    ltversion.m4 \

    lt~obsolete.m4 \

    missing \

    stamp-h1 \

    stamp-h2 ; do

  removethis "$fname"

done

#--------------------------------------------------------------------------

# run the correct scripts now

#

echo "buildconf: running libtoolize"

${libtoolize} --copy --automake --force || die "libtoolize command failed"

# When using libtool 1.5.X (X < 26) we copy libtool.m4 to our local m4

# subdirectory and this local copy is patched to fix some warnings that

# are triggered when running aclocal and using autoconf 2.62 or later.

if test "$lt_major" = "1" && test "$lt_minor" = "5"; then

  if test -z "$lt_patch" || test "$lt_patch" -lt "26"; then

    echo "buildconf: copying libtool.m4 to local m4 subdir"

    ac_dir=`${ACLOCAL:-aclocal} --print-ac-dir`

    if test -f $ac_dir/libtool.m4; then

      cp -f $ac_dir/libtool.m4 m4/libtool.m4

    else

      echo "buildconf: $ac_dir/libtool.m4 not found"

    fi

    if test -f m4/libtool.m4; then

      echo "buildconf: renaming some variables in local m4/libtool.m4"

      $PERL -i.tmp -pe \

        's/lt_prog_compiler_pic_works/lt_cv_prog_compiler_pic_works/g; \

         s/lt_prog_compiler_static_works/lt_cv_prog_compiler_static_works/g;' \

        m4/libtool.m4

      rm -f m4/libtool.m4.tmp

    fi

  fi

fi

if test -f m4/libtool.m4; then

  echo "buildconf: converting all mv to mv -f in local m4/libtool.m4"

  $PERL -i.tmp -pe 's/\bmv +([^-\s])/mv -f $1/g' m4/libtool.m4

  rm -f m4/libtool.m4.tmp

fi

echo "buildconf: running aclocal"

${ACLOCAL:-aclocal} -I m4 $ACLOCAL_FLAGS || die "aclocal command failed"

echo "buildconf: converting all mv to mv -f in local aclocal.m4"

$PERL -i.bak -pe 's/\bmv +([^-\s])/mv -f $1/g' aclocal.m4

echo "buildconf: running autoheader"

${AUTOHEADER:-autoheader} || die "autoheader command failed"

echo "buildconf: running autoconf"

${AUTOCONF:-autoconf} || die "autoconf command failed"

echo "buildconf: running automake"

${AUTOMAKE:-automake} --add-missing --copy || die "automake command failed"

#--------------------------------------------------------------------------

# GNU libtool complementary check

#

# Depending on the libtool and automake versions being used, config.guess

# might not be installed in the subdirectory until automake has finished.

# So we can not attempt to use it until this very last buildconf stage.

#

if test ! -f ./config.guess; then

  echo "buildconf: config.guess not found"

else

  buildhost=`./config.guess 2>/dev/null|head -n 1`

  case $buildhost in

    *-*-darwin*)

      need_lt_major=1

      need_lt_minor=5

      need_lt_patch=26

      need_lt_check="yes"

      ;;

    *-*-hpux*)

      need_lt_major=1

      need_lt_minor=5

      need_lt_patch=24

      need_lt_check="yes"

      ;;

  esac

  if test ! -z "$need_lt_check"; then

    if test -z "$lt_major"; then

      lt_status="bad"

    elif test "$lt_major" -gt "$need_lt_major"; then

      lt_status="good"

    elif test "$lt_major" -lt "$need_lt_major"; then

      lt_status="bad"

    elif test -z "$lt_minor"; then

      lt_status="bad"

    elif test "$lt_minor" -gt "$need_lt_minor"; then

      lt_status="good"

    elif test "$lt_minor" -lt "$need_lt_minor"; then

      lt_status="bad"

    elif test -z "$lt_patch"; then

      lt_status="bad"

    elif test "$lt_patch" -gt "$need_lt_patch"; then

      lt_status="good"

    elif test "$lt_patch" -lt "$need_lt_patch"; then

      lt_status="bad"

    else

      lt_status="good"

    fi

    if test "$lt_status" != "good"; then

      need_lt_version="$need_lt_major.$need_lt_minor.$need_lt_patch"

      echo "buildconf: libtool version $lt_version found."

      echo "            $buildhost requires GNU libtool $need_lt_version or newer installed."

      rm -f configure

      exit 1

    fi

  fi

fi

#--------------------------------------------------------------------------

# Finished successfully.

#

echo "buildconf: OK"

if test -f "test/buildconf"; then

  cd test && ./buildconf

fi

exit 0