updated the build files to utilize the standalone libltdl library if available

configure

@@ -651,6 +651,8 @@ HCL_SIZEOF_LONG_LONG
 HCL_SIZEOF_CHAR32_T
 HCL_SIZEOF_CHAR16_T
 HCL_SIZEOF_WCHAR_T
+ENABLE_LIBLTDL_FALSE
+ENABLE_LIBLTDL_TRUE
 ENABLE_STATIC_MODULE_FALSE
 ENABLE_STATIC_MODULE_TRUE
 ENABLE_DYNAMIC_MODULE_FALSE
@@ -663,6 +665,7 @@ PACKAGE_VERSION_MINOR
 PACKAGE_VERSION_MAJOR
 QUADMATH_LIBS
 UNICOWS_LIBS
+LTDL_LIBS
 DL_LIBS
 LIBM
 WIN32_FALSE
@@ -807,6 +810,7 @@ enable_unicode
 enable_cxx
 enable_dynamic_module
 enable_static_module
+enable_libltdl
 '
       ac_precious_vars='build_alias
 host_alias
@@ -1460,6 +1464,7 @@ Optional Features:
   --enable-dynamic-module enable dynamic module capability(default. yes)
   --enable-static-module  build modules statically into the main
                           library(default. no)
+  --enable-libltdl        use libltdl(default. yes)
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -17528,7 +17533,7 @@ fi
 
 done
 
-for ac_header in dlfcn.h sys/mman.h
+for ac_header in dlfcn.h ltdl.h sys/mman.h
 do :
   as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
 ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
@@ -17683,6 +17688,72 @@ fi
 LIBS="$save_LIBS"
 
 
+save_LIBS="$LIBS"
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing lt_dlopen" >&5
+$as_echo_n "checking for library containing lt_dlopen... " >&6; }
+if ${ac_cv_search_lt_dlopen+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char lt_dlopen ();
+int
+main ()
+{
+return lt_dlopen ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' ltdl; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_search_lt_dlopen=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if ${ac_cv_search_lt_dlopen+:} false; then :
+  break
+fi
+done
+if ${ac_cv_search_lt_dlopen+:} false; then :
+
+else
+  ac_cv_search_lt_dlopen=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_lt_dlopen" >&5
+$as_echo "$ac_cv_search_lt_dlopen" >&6; }
+ac_res=$ac_cv_search_lt_dlopen
+if test "$ac_res" != no; then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+	LTDL_LIBS="$ac_cv_search_lt_dlopen"
+	if test "x${LTDL_LIBS}" = "xnone required"
+	then
+		LTDL_LIBS=""
+	fi
+
+fi
+
+LIBS="$save_LIBS"
+
+
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for main in -lunicows" >&5
 $as_echo_n "checking for main in -lunicows... " >&6; }
 if ${ac_cv_lib_unicows_main+:} false; then :
@@ -19543,6 +19614,34 @@ else
 fi
 
 
+# Check whether --enable-libltdl was given.
+if test "${enable_libltdl+set}" = set; then :
+  enableval=$enable_libltdl; enable_libltdl_is=$enableval
+else
+  enable_libltdl_is=yes
+
+fi
+
+if test "${enable_libltdl_is}" = "yes"
+then
+	if test "${ac_cv_header_ltdl_h}" = "yes"  -a "${LTDL_LIBS}" != ""
+	then
+
+$as_echo "#define HCL_ENABLE_LIBLTDL /**/" >>confdefs.h
+
+	else
+		enable_libltdl_is="no"
+	fi
+fi
+ if test "${enable_libltdl_is}" = "yes"; then
+  ENABLE_LIBLTDL_TRUE=
+  ENABLE_LIBLTDL_FALSE='#'
+else
+  ENABLE_LIBLTDL_TRUE='#'
+  ENABLE_LIBLTDL_FALSE=
+fi
+
+
 HCL_SIZEOF_WCHAR_T=$ac_cv_sizeof_wchar_t
 
 HCL_SIZEOF_CHAR16_T=$ac_cv_sizeof_char16_t
@@ -19737,6 +19836,10 @@ if test -z "${ENABLE_STATIC_MODULE_TRUE}" && test -z "${ENABLE_STATIC_MODULE_FAL
   as_fn_error $? "conditional \"ENABLE_STATIC_MODULE\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
 fi
+if test -z "${ENABLE_LIBLTDL_TRUE}" && test -z "${ENABLE_LIBLTDL_FALSE}"; then
+  as_fn_error $? "conditional \"ENABLE_LIBLTDL\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
 
 : "${CONFIG_STATUS=./config.status}"
 ac_write_fail=0