diff --git a/Makefile.am b/Makefile.am
index 79dee6c..c355c75 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,7 +1,10 @@
 ## Makefile.am for xsystem35
 
-#SUBDIRS = m4 po libltdl macros modules src 
-SUBDIRS = po libltdl macros modules src 
+SUBDIRS = po macros src
+
+if ENABLE_LTDL
+SUBDIRS += libltdl modules
+endif
 
 ACLOCAL_AMFLAGS = -I macros
 
diff --git a/Makefile.in b/Makefile.in
index 8d91388..bd1eaac 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -78,6 +78,7 @@ POST_UNINSTALL = :
 build_triplet = @build@
 host_triplet = @host@
 target_triplet = @target@
+@ENABLE_LTDL_TRUE@am__append_1 = libltdl modules
 subdir = .
 DIST_COMMON = INSTALL NEWS README AUTHORS ChangeLog \
 	$(srcdir)/Makefile.in $(srcdir)/Makefile.am \
@@ -167,7 +168,7 @@ am__define_uniq_tagged_files = \
 ETAGS = etags
 CTAGS = ctags
 CSCOPE = cscope
-DIST_SUBDIRS = $(SUBDIRS)
+DIST_SUBDIRS = po macros src libltdl modules
 DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 distdir = $(PACKAGE)-$(VERSION)
 top_distdir = $(distdir)
@@ -404,9 +405,7 @@ target_vendor = @target_vendor@
 top_build_prefix = @top_build_prefix@
 top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
-
-#SUBDIRS = m4 po libltdl macros modules src 
-SUBDIRS = po libltdl macros modules src 
+SUBDIRS = po macros src $(am__append_1)
 ACLOCAL_AMFLAGS = -I macros
 EXTRA_DIST = xsystem35.spec
 all: config.h
diff --git a/config.h.in b/config.h.in
index c17ea42..db868b1 100644
--- a/config.h.in
+++ b/config.h.in
@@ -42,6 +42,9 @@
 /* Define this if you have gtk+ >= 2.0.0 */
 #undef ENABLE_GTK
 
+/* define this if you use ltdl */
+#undef ENABLE_LTDL
+
 /* define this if you use external midi player */
 #undef ENABLE_MIDI_EXTPLAYER
 
diff --git a/configure b/configure
index 869e30a..893e576 100755
--- a/configure
+++ b/configure
@@ -639,7 +639,6 @@ ltdl_LIBOBJS
 am__EXEEXT_FALSE
 am__EXEEXT_TRUE
 LTLIBOBJS
-LIBOBJS
 EXTRALDFLAGS
 EXTRALIBS
 EXTRACFLAGS
@@ -702,6 +701,7 @@ XGETTEXT
 GMSGFMT
 MSGFMT
 MKINSTALLDIRS
+LIBOBJS
 LTDLOPEN
 LT_CONFIG_H
 subdirs
@@ -721,6 +721,8 @@ INCLTDL
 LTDLINCL
 LTDLDEPS
 LIBLTDL
+ENABLE_LTDL_FALSE
+ENABLE_LTDL_TRUE
 CPP
 OTOOL64
 OTOOL
@@ -3328,7 +3330,6 @@ fi
 	for k in macros ; do ACLOCAL="$ACLOCAL -I $k" ; done
 
 
-
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@@ -11894,6 +11895,15 @@ CC="$lt_save_CC"
 # Only expand once:
 
 
+ if test "x$enable_shared" = xyes; then
+  ENABLE_LTDL_TRUE=
+  ENABLE_LTDL_FALSE='#'
+else
+  ENABLE_LTDL_TRUE='#'
+  ENABLE_LTDL_FALSE=
+fi
+
+if test "x$enable_shared" = xyes; then
 
 
 
@@ -11901,24 +11911,7 @@ CC="$lt_save_CC"
 
 
 
-case $enable_ltdl_convenience in
-  no) as_fn_error $? "this package needs a convenience libltdl" "$LINENO" 5 ;;
-  "") enable_ltdl_convenience=yes
-      ac_configure_args="$ac_configure_args --enable-ltdl-convenience" ;;
-esac
-LIBLTDL='${top_build_prefix}'"${lt_ltdl_dir+$lt_ltdl_dir/}libltdlc.la"
-LTDLDEPS=$LIBLTDL
-LTDLINCL='-I${top_srcdir}'"${lt_ltdl_dir+/$lt_ltdl_dir}"
-
-
-
-
-
-# For backwards non-gettext consistent compatibility...
-INCLTDL="$LTDLINCL"
-
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking which extension is used for runtime loadable modules" >&5
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking which extension is used for runtime loadable modules" >&5
 $as_echo_n "checking which extension is used for runtime loadable modules... " >&6; }
 if ${libltdl_cv_shlibext+:} false; then :
   $as_echo_n "(cached) " >&6
@@ -12994,90 +12987,124 @@ eval "LTDLOPEN=\"$libname_spec\""
 
 
 
+$as_echo "#define ENABLE_LTDL 1" >>confdefs.h
 
-
-if test -f $prefix/lib/libltdl.la; then
-  lt_save_LDFLAGS="$LDFLAGS"
-  LDFLAGS="-L$prefix/lib $LDFLAGS"
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for lt_dlinit in -lltdl" >&5
-$as_echo_n "checking for lt_dlinit in -lltdl... " >&6; }
-if ${ac_cv_lib_ltdl_lt_dlinit+:} false; then :
-  $as_echo_n "(cached) " >&6
 else
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-lltdl  $LIBS"
-cat confdefs.h - <<_ACEOF >conftest.$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_dlinit ();
-int
-main ()
-{
-return lt_dlinit ();
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_link "$LINENO"; then :
-  ac_cv_lib_ltdl_lt_dlinit=yes
-else
-  ac_cv_lib_ltdl_lt_dlinit=no
-fi
-rm -f core conftest.err conftest.$ac_objext \
-    conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_ltdl_lt_dlinit" >&5
-$as_echo "$ac_cv_lib_ltdl_lt_dlinit" >&6; }
-if test "x$ac_cv_lib_ltdl_lt_dlinit" = xyes; then :
-  lt_lib_ltdl=yes
+
+# Check whether --enable-ltdl-install was given.
+if test "${enable_ltdl_install+set}" = set; then :
+  enableval=$enable_ltdl_install;
 fi
 
-  LDFLAGS="$lt_save_LDFLAGS"
-  if test x"${lt_lib_ltdl-no}" = xyes; then
-    if test x"$enable_ltdl_install" != xyes; then
-      # Don't overwrite $prefix/lib/libltdl.la without --enable-ltdl-install
-      { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: not overwriting libltdl at $prefix, force with \`--enable-ltdl-install'" >&5
-$as_echo "$as_me: WARNING: not overwriting libltdl at $prefix, force with \`--enable-ltdl-install'" >&2;}
-      enable_ltdl_install=no
-    fi
-  elif test x"$enable_ltdl_install" = xno; then
-    { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: libltdl not installed, but installation disabled" >&5
-$as_echo "$as_me: WARNING: libltdl not installed, but installation disabled" >&2;}
-  fi
-fi
 
-# If configure.ac declared an installable ltdl, and the user didn't override
-# with --disable-ltdl-install, we will install the shipped libltdl.
-case $enable_ltdl_install in
-  no) ac_configure_args="$ac_configure_args --enable-ltdl-install=no"
-      LIBLTDL="-lltdl"
-      LTDLDEPS=
-      LTDLINCL=
-      ;;
-  *)  enable_ltdl_install=yes
-      ac_configure_args="$ac_configure_args --enable-ltdl-install"
-      LIBLTDL='${top_build_prefix}'"${lt_ltdl_dir+$lt_ltdl_dir/}libltdl.la"
-      LTDLDEPS=$LIBLTDL
-      LTDLINCL='-I${top_srcdir}'"${lt_ltdl_dir+/$lt_ltdl_dir}"
-      ;;
+case ,${enable_ltdl_install},${enable_ltdl_convenience} in
+  *yes*) ;;
+  *) enable_ltdl_convenience=yes ;;
 esac
 
+ if test x"${enable_ltdl_install-no}" != xno; then
+  INSTALL_LTDL_TRUE=
+  INSTALL_LTDL_FALSE='#'
+else
+  INSTALL_LTDL_TRUE='#'
+  INSTALL_LTDL_FALSE=
+fi
+
+  if test x"${enable_ltdl_convenience-no}" != xno; then
+  CONVENIENCE_LTDL_TRUE=
+  CONVENIENCE_LTDL_FALSE='#'
+else
+  CONVENIENCE_LTDL_TRUE='#'
+  CONVENIENCE_LTDL_FALSE=
+fi
 
 
 
 
-# For backwards non-gettext consistent compatibility...
-INCLTDL="$LTDLINCL"
+
+# In order that ltdl.c can compile, find out the first AC_CONFIG_HEADERS
+# the user used.  This is so that ltdl.h can pick up the parent projects
+# config.h file, The first file in AC_CONFIG_HEADERS must contain the
+# definitions required by ltdl.c.
+# FIXME: Remove use of undocumented AC_LIST_HEADERS (2.59 compatibility).
 
 
 
+for ac_header in unistd.h dl.h sys/dl.h dld.h mach-o/dyld.h dirent.h
+do :
+  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
+ac_fn_c_check_header_compile "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default
+"
+if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
+_ACEOF
+
+fi
+
+done
+
+
+for ac_func in closedir opendir readdir
+do :
+  as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
+ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
+if eval test \"x\$"$as_ac_var"\" = x"yes"; then :
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
+_ACEOF
+
+else
+  case " $LIBOBJS " in
+  *" lt__dirent.$ac_objext "* ) ;;
+  *) LIBOBJS="$LIBOBJS lt__dirent.$ac_objext"
+ ;;
+esac
+
+fi
+done
+
+for ac_func in strlcat strlcpy
+do :
+  as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
+ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
+if eval test \"x\$"$as_ac_var"\" = x"yes"; then :
+  cat >>confdefs.h <<_ACEOF
+#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
+_ACEOF
+
+else
+  case " $LIBOBJS " in
+  *" lt__strl.$ac_objext "* ) ;;
+  *) LIBOBJS="$LIBOBJS lt__strl.$ac_objext"
+ ;;
+esac
+
+fi
+done
+
+
+
+cat >>confdefs.h <<_ACEOF
+#define LT_LIBEXT "$libext"
+_ACEOF
+
+
+name=
+eval "lt_libprefix=\"$libname_spec\""
+
+cat >>confdefs.h <<_ACEOF
+#define LT_LIBPREFIX "$lt_libprefix"
+_ACEOF
+
+
+name=ltdl
+eval "LTDLOPEN=\"$libname_spec\""
+
+
+fi
+
 
         MKINSTALLDIRS=
   if test -n "$ac_aux_dir"; then
@@ -18384,7 +18411,7 @@ LIBS="$ac_save_LIBS"
 if test "x$available_jpeg" = xyes; then
 
 $as_echo "#define HAVE_JPEG 1" >>confdefs.h
-,
+
 fi
 
  if test "x$available_jpeg" = xyes; then
@@ -18622,6 +18649,10 @@ if test -z "${am__fastdepCC_TRUE}" && test -z "${am__fastdepCC_FALSE}"; then
   as_fn_error $? "conditional \"am__fastdepCC\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
 fi
+if test -z "${ENABLE_LTDL_TRUE}" && test -z "${ENABLE_LTDL_FALSE}"; then
+  as_fn_error $? "conditional \"ENABLE_LTDL\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
 if test -z "${INSTALL_LTDL_TRUE}" && test -z "${INSTALL_LTDL_FALSE}"; then
   as_fn_error $? "conditional \"INSTALL_LTDL\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
@@ -18647,6 +18678,15 @@ LT_CONFIG_H=config.h
     ltdl_LTLIBOBJS=$_ltdl_ltlibobjs
 
 
+if test -z "${INSTALL_LTDL_TRUE}" && test -z "${INSTALL_LTDL_FALSE}"; then
+  as_fn_error $? "conditional \"INSTALL_LTDL\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${CONVENIENCE_LTDL_TRUE}" && test -z "${CONVENIENCE_LTDL_FALSE}"; then
+  as_fn_error $? "conditional \"CONVENIENCE_LTDL\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+LT_CONFIG_H=config.h
 
 if test -z "${HAVE_GTK_TRUE}" && test -z "${HAVE_GTK_FALSE}"; then
   as_fn_error $? "conditional \"HAVE_GTK\" was never defined.
diff --git a/configure.ac b/configure.ac
index 29473c0..2ff4489 100644
--- a/configure.ac
+++ b/configure.ac
@@ -50,11 +50,6 @@ dnl
 dnl AM_ACLOCAL_INCLUDE(m4)
 AM_ACLOCAL_INCLUDE(macros)
 
-dnl
-dnl add subdirectory for libltdl
-dnl
-dnl AC_CONFIG_SUBDIRS(libltdl)
-
 dnl
 dnl Checks for programs.
 dnl
@@ -67,21 +62,15 @@ dnl AC_C_VAR_FUNC
 dnl
 dnl Check for libltdl
 dnl 
-dnl AC_CONFIG_SUBDIRS(libltdl)
 LT_INIT([dlopen])
-LT_CONFIG_LTDL_DIR([libltdl])
-_LTDL_CONVENIENCE
-LTDL_INIT([])
-AC_SUBST([LTDLINCL])
-AC_SUBST([LIBLTDL])
-
-dnl LT_INIT
-dnl AC_SUBST(INCLTDL)
-dnl AC_SUBST(LIBLTDL)
-dnl AC_SUBST(LIBADD_DL)
-dnl _LT_CONFIG_LTDL_DIR([m4_default([], [libltdl])])
-_LTDL_INSTALLABLE
-dnl LTDL_INIT([])
+AM_CONDITIONAL(ENABLE_LTDL, test "x$enable_shared" = xyes)
+if test "x$enable_shared" = xyes; then
+  LT_CONFIG_LTDL_DIR([libltdl])
+  LTDL_INIT
+  AC_DEFINE(ENABLE_LTDL,1,[define this if you use ltdl])
+else
+  _LTDL_SETUP
+fi
 
 dnl
 dnl Check for gettext
@@ -730,7 +719,7 @@ CFLAGS="$ac_save_CFLAGS"
 LIBS="$ac_save_LIBS"
 
 if test "x$available_jpeg" = xyes; then
-   AC_DEFINE(HAVE_JPEG,1,[Define this if you have libjpeg installed]),
+   AC_DEFINE(HAVE_JPEG,1,[Define this if you have libjpeg installed])
 fi
 
 AM_CONDITIONAL(ENABLE_JPEG, test "x$available_jpeg" = xyes)
diff --git a/src/cmd2F60.c b/src/cmd2F60.c
index 5114ca3..7d0b8e4 100644
--- a/src/cmd2F60.c
+++ b/src/cmd2F60.c
@@ -22,7 +22,9 @@
 /* $Id: cmd2F60.c,v 1.11 2003/01/12 10:48:50 chikama Exp $ */
 
 #include <stdio.h>
+#ifdef ENABLE_LTDL
 #include <ltdl.h>
+#endif
 
 #include "portab.h"
 #include "system.h"
@@ -40,6 +42,7 @@ void commands2F60() {
 	int fnum = sys_getdw();  /* function number */
 	entrypoint *function = NULL;
 
+#ifdef ENABLE_LTDL
 	if (dll == NULL) {
 		SYSERROR("No DLL initilized\n");
 	}
@@ -58,6 +61,7 @@ void commands2F60() {
 		(*function)();
 		return;
 	}
+#endif
 	
  eexit:
 	SYSERROR("Can't continue further scenario.(%d,%d)(%s,%s)\n", type, fnum, dll[type].name, dll[type].function[fnum].name);
diff --git a/src/s39ain.c b/src/s39ain.c
index 56ca04e..8f4eae0 100644
--- a/src/s39ain.c
+++ b/src/s39ain.c
@@ -25,7 +25,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
-#include <ltdl.h>
 
 #include "portab.h"
 #include "system.h"
@@ -49,6 +48,7 @@
   system39.ain の読み込み
 */
 int s39ain_init(void) {
+#ifdef ENABLE_LTDL
 	FILE *fp;
 	long len;
 	char *buf;
@@ -211,4 +211,7 @@ int s39ain_init(void) {
 	
 	free(buf);
 	return OK;
+#else
+	return NG;
+#endif // ENABLE_LTDL
 }
diff --git a/src/s39ain.h b/src/s39ain.h
index 361658a..4445716 100644
--- a/src/s39ain.h
+++ b/src/s39ain.h
@@ -24,7 +24,12 @@
 #ifndef __S39AIN_H__
 #define __S39AIN_H__
 
+#ifdef ENABLE_LTDL
 #include <ltdl.h>
+#else
+typedef void lt_dlhandle;
+#endif
+
 #include "portab.h"
 
 /* DLL 内関数情報 */