buildconf

#!/bin/sh

#--------------------------------------------------------------------------
# findtool works as 'which' but we use a different name to make it more
# obvious we aren't using 'which'! ;-)
#
findtool(){
  file="$1"

  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

#--------------------------------------------------------------------------
# this approach that tries 'glibtool' first is some kind of work-around for
# some BSD-systems I believe that use to provide the GNU libtool named
# glibtool, with 'libtool' being something completely different.
libtool=`findtool glibtool 2>/dev/null`
if test ! -x "$libtool"; then
  libtool=`findtool ${LIBTOOL:-libtool}`
fi

if test -z "$LIBTOOLIZE"; then
  # set the LIBTOOLIZE here so that glibtoolize is used if glibtool was found
  # $libtool is already the full path
  libtoolize="${libtool}ize"
else
  libtoolize=`findtool $LIBTOOLIZE`
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 \
    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
#

${libtoolize} --copy --automake --force
${ACLOCAL:-aclocal} -I m4 $ACLOCAL_FLAGS
${AUTOHEADER:-autoheader}
${AUTOCONF:-autoconf}
${AUTOMAKE:-automake} --add-missing --copy