+
+# Ensure that whenever we pull in a gnulib update or otherwise change to a
+# different version (i.e., when switching branches), we also rerun ./bootstrap.
+curr_status=.git-module-status
+t=$(git submodule status|sed 's/^[ +-]//;s/ .*//')
+if test "$t" = "$(cat $curr_status 2>/dev/null)"; then
+ : # good, it's up to date
+else
+ echo running bootstrap...
+ ./bootstrap && echo "$t" > $curr_status
+fi
+
+CONFIGUREDIR=.
+
+# Run configure in BUILDDIR if it's set
+if [ ! -z "$BUILDDIR" ]; then
+ mkdir -p $BUILDDIR
+ cd $BUILDDIR
+
+ CONFIGUREDIR=..
+fi
+
+# Ensure that an ocaml package is present for build-from sources.
+# This is *not* for anything that is required at configure-time
+# when configure is run from a distribution tarball. From those,
+# nothing ocaml-related is required.
+# ocamlfind cannot detect the presence of -devel packages directly,
+# so if $pkg ends in -devel, first check for the base package, and
+# if that's found, check for the existence of $base.cmxa in the
+# resulting directory.
+require_ocaml_pkg()
+{
+ pkg=$1
+ case $pkg in
+ *-devel)
+ local base=${pkg%%-devel}
+ local dir=$(ocamlfind query "$base") || return 1
+ test -f "$dir/$base.cmxa" || return 1
+ ;;
+ *) ocamlfind query "$pkg" > /dev/null 2>&1 || return 1;;
+ esac
+ return 0
+}
+
+{ require_ocaml_pkg xml-light && require_ocaml_pkg xml-light-devel; } \
+ || { echo "you must have ocaml, ocamlfind, ocaml-xml-light" \
+ "and ocaml-xml-light-devel" >&2; exit 1; }
+
+# If no arguments were specified and configure has run before, use the previous
+# arguments
+if [ $# == 0 -a -x ./config.status ]; then
+ ./config.status --recheck
+else
+ $CONFIGUREDIR/configure "$@"
+fi