diff --git a/ChangeLog b/ChangeLog
index bf2b4c363d..7555e8551b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+Mon Mar 16 09:28:58 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* Makefile.in, common.mk, win32/Makefile.sub: added preprocessing rules.
+
+Sun Mar 15 12:34:17 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* test/minitest/test_mini_test.rb: fixed tests depending on the
+	  detail of floating point representation.
+
 Sun Mar 15 12:01:36 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* lib/rubygems/installer.rb (Gem::Installer#shebang): fix for env
diff --git a/Makefile.in b/Makefile.in
index 6f617c34d2..766b1124d6 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -215,6 +215,9 @@ lex.c: defs/keywords
 .c.S:
 	$(CC) $(CFLAGS) $(XCFLAGS) $(CPPFLAGS) $(COUTFLAG)$@ -S $<
 
+.c.i:
+	$(CC) $(CFLAGS) $(XCFLAGS) $(CPPFLAGS) $(COUTFLAG)$@ -E $< > $@
+
 clean-local::
 	@$(RM) ext/extinit.c ext/extinit.$(OBJEXT) ext/ripper/y.output
 
diff --git a/common.mk b/common.mk
index 62c755dd03..bb80ca1e58 100644
--- a/common.mk
+++ b/common.mk
@@ -2,7 +2,7 @@ bin: $(PROGRAM) $(WPROGRAM)
 lib: $(LIBRUBY)
 dll: $(LIBRUBY_SO)
 
-.SUFFIXES: .inc .h .c .y
+.SUFFIXES: .inc .h .c .y .i
 
 RUBYLIB       = -
 RUBYOPT       = -
diff --git a/version.h b/version.h
index fb153c45e5..6c4fd2ba82 100644
--- a/version.h
+++ b/version.h
@@ -1,5 +1,5 @@
 #define RUBY_VERSION "1.9.2"
-#define RUBY_RELEASE_DATE "2009-03-15"
+#define RUBY_RELEASE_DATE "2009-03-16"
 #define RUBY_PATCHLEVEL -1
 #define RUBY_BRANCH_NAME "trunk"
 
@@ -8,7 +8,7 @@
 #define RUBY_VERSION_TEENY 1
 #define RUBY_RELEASE_YEAR 2009
 #define RUBY_RELEASE_MONTH 3
-#define RUBY_RELEASE_DAY 15
+#define RUBY_RELEASE_DAY 16
 
 #ifdef RUBY_EXTERN
 RUBY_EXTERN const char ruby_version[];
diff --git a/win32/Makefile.sub b/win32/Makefile.sub
index aa3bcaf55b..fd7cd1747e 100644
--- a/win32/Makefile.sub
+++ b/win32/Makefile.sub
@@ -830,6 +830,15 @@ end
 .c.asm:
 	$(CC) $(CFLAGS) $(XCFLAGS) $(CPPFLAGS) -Fa$@ -c -Tc$(<:\=/)
 
+{$(srcdir)/missing}.c.i:
+	$(CC) $(XCFLAGS) $(CPPFLAGS) -P -Tc$(<:\=/) > $@
+{$(srcdir)/win32}.c.i:
+	$(CC) $(XCFLAGS) $(CPPFLAGS) -P -Tc$(<:\=/)
+{$(srcdir)}.c.i:
+	$(CC) $(XCFLAGS) $(CPPFLAGS) -P -Tc$(<:\=/)
+.c.i:
+	$(CC) $(XCFLAGS) $(CPPFLAGS) -P -Tc$(<:\=/)
+
 .rc.res:
 	$(RC) -I. -I$(<D) $(iconinc) -I$(srcdir)/win32 $(RFLAGS) -fo$@ $(<:\=/)