5 files changed, 83 insertions, 0 deletions
diff --git a/include/ruby/backward/classext.h b/include/ruby/backward/classext.h
new file mode 100644
index 0000000000..9d5747316a
--- /dev/null
+++ b/include/ruby/backward/classext.h
@@ -0,0 +1,18 @@
+#if   defined __GNUC__
+#warning use of RClass internals is deprecated
+#elif defined _MSC_VER
+#pragma message("warning: use of RClass internals is deprecated")
+#endif
+
+#ifndef RUBY_BACKWARD_CLASSEXT_H
+#define RUBY_BACKWARD_CLASSEXT_H 1
+
+typedef struct rb_deprecated_classext_struct {
+    VALUE super;
+} rb_deprecated_classext_t;
+
+#undef RCLASS_SUPER(c)
+#define RCLASS_EXT(c) ((rb_deprecated_classext_t *)RCLASS(c)->ptr)
+#define RCLASS_SUPER(c) (RCLASS(c)->super)
+
+#endif	/* RUBY_BACKWARD_CLASSEXT_H */
diff --git a/include/ruby/backward/rubyio.h b/include/ruby/backward/rubyio.h
new file mode 100644
index 0000000000..a6e3a7c78b
--- /dev/null
+++ b/include/ruby/backward/rubyio.h
@@ -0,0 +1,6 @@
+#if   defined __GNUC__
+#warning use "ruby/io.h" instead of "rubyio.h"
+#elif defined _MSC_VER
+#pragma message("warning: use \"ruby/io.h\" instead of \"rubyio.h\"")
+#endif
+#include "ruby/io.h"
diff --git a/include/ruby/backward/rubysig.h b/include/ruby/backward/rubysig.h
new file mode 100644
index 0000000000..58b13cab1c
--- /dev/null
+++ b/include/ruby/backward/rubysig.h
@@ -0,0 +1,47 @@
+/**********************************************************************
+
+  rubysig.h -
+
+  $Author$
+  $Date$
+  created at: Wed Aug 16 01:15:38 JST 1995
+
+  Copyright (C) 1993-2008 Yukihiro Matsumoto
+
+**********************************************************************/
+
+#if   defined __GNUC__
+#warning rubysig.h is obsolete
+#elif defined _MSC_VER
+#pragma message("warning: rubysig.h is obsolete")
+#endif
+
+#ifndef RUBYSIG_H
+#define RUBYSIG_H
+#include "ruby/ruby.h"
+
+#if defined(__cplusplus)
+extern "C" {
+#if 0
+} /* satisfy cc-mode */
+#endif
+#endif
+
+RUBY_SYMBOL_EXPORT_BEGIN
+
+#define RUBY_CRITICAL(statements) do {statements;} while (0)
+#define DEFER_INTS (0)
+#define ENABLE_INTS (1)
+#define ALLOW_INTS do {CHECK_INTS;} while (0)
+#define CHECK_INTS rb_thread_check_ints()
+
+RUBY_SYMBOL_EXPORT_END
+
+#if defined(__cplusplus)
+#if 0
+{ /* satisfy cc-mode */
+#endif
+}  /* extern "C" { */
+#endif
+
+#endif
diff --git a/include/ruby/backward/st.h b/include/ruby/backward/st.h
new file mode 100644
index 0000000000..3e36d44cf8
--- /dev/null
+++ b/include/ruby/backward/st.h
@@ -0,0 +1,6 @@
+#if   defined __GNUC__
+#warning use "ruby/st.h" instead of bare "st.h"
+#elif defined _MSC_VER
+#pragma message("warning: use \"ruby/st.h\" instead of bare \"st.h\"")
+#endif
+#include "ruby/st.h"
diff --git a/include/ruby/backward/util.h b/include/ruby/backward/util.h
new file mode 100644
index 0000000000..11d32a2da8
--- /dev/null
+++ b/include/ruby/backward/util.h
@@ -0,0 +1,6 @@
+#if   defined __GNUC__
+#warning use "ruby/util.h" instead of bare "util.h"
+#elif defined _MSC_VER
+#pragma message("warning: use \"ruby/util.h\" instead of bare \"util.h\"")
+#endif
+#include "ruby/util.h"