+# pycaml. Binding between Python and OCaml
+my $syspydir=`ocamlfind query pycaml 2> /dev/null | xargs echo -n`;
+
+if($syspydir) {
+ $pydir=$syspydir;
+ pr2 "'pycaml' library is present in $pydir";
+} else {
+ pr2 "'pycaml' library is not present. A local copy will be used.";
+}
+
+# menhirLib. Runtime system for the parsers generated with menhir
+my $sysmenhirdir=`ocamlfind query menhirLib 2> /dev/null | xargs echo -n`;
+
+if($sysmenhirdir) {
+ $menhirdir=$sysmenhirdir;
+ pr2 "'menhirLib' library is present in $menhirdir";
+} else {
+ pr2 "'menhirLib' library is not present. A local copy will be used..";
+}
+
+# sexplib. Runtime system for the parsers generated with menhir
+my $syssexpdir=`ocamlfind query sexplib 2> /dev/null | xargs echo -n`;
+
+if($syssexpdir) {
+ $sexpdir=$syssexpdir;
+ pr2 "'sexplib' library is present in $sexpdir";
+} else {
+ pr2 "'sexplib' library is not present. A local copy will be used..";
+}
+