diff --git a/ChangeLog b/ChangeLog
index b9d130f81e..c35db9ce0a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+Wed Apr 20 23:22:39 2005  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* Makefile.in, common.mk: miniruby depens on MINIOBJS.
+
+	* dmydln.c (dln_load): dummy function to raise LoadError.
+
+	* cygwin/GNUmakefile.in, {bcc32,win32,wince}/Makefile.sub: miniruby
+	  can't load extensions on Windows.
+
 Wed Apr 20 23:01:35 2005  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* win32/ifchange.bat: delete testing files.
diff --git a/Makefile.in b/Makefile.in
index b677f8216b..d61df932c2 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -97,7 +97,7 @@ all:
 
 miniruby$(EXEEXT):
 		@$(RM) $@
-		$(PURIFY) $(CC) $(MAINOBJ) $(LIBRUBY_A) $(LIBS) $(OUTFLAG)$@ $(LDFLAGS) $(MAINLIBS)
+		$(PURIFY) $(CC) $(MAINOBJ) $(MINIOBJS) $(LIBRUBY_A) $(LIBS) $(OUTFLAG)$@ $(LDFLAGS) $(MAINLIBS)
 
 $(PROGRAM):
 		@$(RM) $@
diff --git a/bcc32/Makefile.sub b/bcc32/Makefile.sub
index c00ad76772..96ba223570 100644
--- a/bcc32/Makefile.sub
+++ b/bcc32/Makefile.sub
@@ -171,6 +171,7 @@ DMYOBJS       = dmyext.obj
 OBJEXT        = obj
 
 WINMAINOBJ    = winmain.$(OBJEXT)
+MINIOBJS      = dmydln.$(OBJEXT)
 
 .path.c = .;$(srcdir);$(srcdir)win32;$(srcdir)missing
 .path.h = .;$(srcdir);$(srcdir)win32;$(srcdir)missing
@@ -394,7 +395,7 @@ s,@top_srcdir@,$(srcdir),;t t
 
 miniruby$(EXEEXT):
 		@echo $(LIBS)
-		$(LD) $(LDFLAGS) $(XLDFLAGS) $(MAINOBJ),$@,nul,$(LIBRUBY_A) $(LIBS)
+		$(LD) $(LDFLAGS) $(XLDFLAGS) $(MAINOBJ) $(MINIOBJS),$@,nul,$(LIBRUBY_A) $(LIBS)
 
 $(PROGRAM):	$(MAINOBJ) $(LIBRUBY_SO) $(RUBY_INSTALL_NAME).res
 		$(LD) $(LDFLAGS) $(XLDFLAGS) $(MAINOBJ),$@,nul,$(LIBRUBYARG) $(LIBS),,$(RUBY_INSTALL_NAME).res
diff --git a/common.mk b/common.mk
index 1a6e0467e8..a316ef8e48 100644
--- a/common.mk
+++ b/common.mk
@@ -58,7 +58,7 @@ all: $(MKFILES) $(PREP) $(RBCONFIG) $(LIBRUBY)
 	@$(MINIRUBY) $(srcdir)/ext/extmk.rb $(EXTMK_ARGS)
 prog: $(PROGRAM) $(WPROGRAM)
 
-miniruby$(EXEEXT): config.status $(LIBRUBY_A) $(MAINOBJ) $(OBJS) $(DMYEXT)
+miniruby$(EXEEXT): config.status $(LIBRUBY_A) $(MAINOBJ) $(MINIOBJS) $(OBJS) $(DMYEXT)
 
 $(PROGRAM): $(LIBRUBY) $(MAINOBJ) $(OBJS) $(EXTOBJS) $(SETUP) $(PREP)
 
@@ -207,6 +207,9 @@ dir.$(OBJEXT): {$(VPATH)}dir.c {$(VPATH)}ruby.h config.h \
 dln.$(OBJEXT): {$(VPATH)}dln.c {$(VPATH)}ruby.h config.h \
   {$(VPATH)}defines.h {$(VPATH)}intern.h {$(VPATH)}missing.h \
   {$(VPATH)}dln.h
+dmydln.$(OBJEXT): {$(VPATH)}dmydln.c {$(VPATH)}dln.c {$(VPATH)}ruby.h \
+  config.h {$(VPATH)}defines.h {$(VPATH)}intern.h {$(VPATH)}missing.h \
+  {$(VPATH)}dln.h
 dmyext.$(OBJEXT): {$(VPATH)}dmyext.c
 enum.$(OBJEXT): {$(VPATH)}enum.c {$(VPATH)}ruby.h config.h \
   {$(VPATH)}defines.h {$(VPATH)}intern.h {$(VPATH)}missing.h \
diff --git a/cygwin/GNUmakefile.in b/cygwin/GNUmakefile.in
index 03208df11c..b366b2096f 100644
--- a/cygwin/GNUmakefile.in
+++ b/cygwin/GNUmakefile.in
@@ -1,3 +1,5 @@
+MINIOBJS = dmydln.o
+
 include Makefile
 
 ENABLE_SHARED=@ENABLE_SHARED@
diff --git a/dln.c b/dln.c
index efdbcc8d02..fbfd6c2db2 100644
--- a/dln.c
+++ b/dln.c
@@ -91,6 +91,8 @@ char *getenv();
 
 int eaccess();
 
+#ifndef NO_DLN_LOAD
+
 #if defined(HAVE_DLOPEN) && !defined(USE_DLN_A_OUT) && !defined(_AIX) && !defined(__APPLE__) && !defined(_UNICOSMP)
 /* dynamic load with dlopen() */
 # define USE_DLN_DLOPEN
@@ -1274,10 +1276,16 @@ static int vms_fileact(char *filespec, int type);
 static long vms_fisexh(long *sigarr, long *mecarr);
 #endif
 
+#endif /* NO_DLN_LOAD */
+
 void*
 dln_load(file)
     const char *file;
 {
+#ifdef NO_DLN_LOAD
+    rb_raise(rb_eLoadError, "this executable file can't load extension libraries");
+#else
+
 #if !defined(_AIX) && !defined(NeXT)
     const char *error = 0;
 #define DLN_ERROR() (error = dln_strerror(), strcpy(ALLOCA_N(char, strlen(error) + 1), error))
@@ -1633,6 +1641,8 @@ dln_load(file)
   failed:
     rb_loaderror("%s - %s", error, file);
 #endif
+
+#endif /* NO_DLN_LOAD */
     return 0;			/* dummy return */
 }
 
diff --git a/win32/Makefile.sub b/win32/Makefile.sub
index bb99e88a08..2e4f7c6bd9 100644
--- a/win32/Makefile.sub
+++ b/win32/Makefile.sub
@@ -172,6 +172,7 @@ EXTOBJS       =
 DLDOBJS       = 
 
 WINMAINOBJ    = winmain.$(OBJEXT)
+MINIOBJS      = dmydln.$(OBJEXT)
 
 all: $(srcdir)/win32/Makefile.sub $(srcdir)/common.mk
 
@@ -396,7 +397,7 @@ s,@top_srcdir@,$(srcdir),;t t
 
 miniruby$(EXEEXT):
 		@echo. $(LIBS)
-		$(PURIFY) $(CC) $(MAINOBJ) $(LIBRUBY_A) $(LIBS) -Fe$@ $(LDFLAGS)
+		$(PURIFY) $(CC) $(MAINOBJ) $(MINIOBJS) $(LIBRUBY_A) $(LIBS) -Fe$@ $(LDFLAGS)
 
 $(PROGRAM):	$(RUBY_INSTALL_NAME).res
 		$(PURIFY) $(CC) $(MAINOBJ) $(RUBY_INSTALL_NAME).res \