+extern char const * const lyx_version_info;
+
+// Do not remove the comment below, so we get merge conflict in
+// independent branches. Instead add your own.
+#define LYX_FORMAT_LYX 474 // rgh: dummy format change for Chunk switch
+#define LYX_FORMAT_TEX2LYX 474
+
+#if LYX_FORMAT_TEX2LYX != LYX_FORMAT_LYX
+#ifndef _MSC_VER
+#warning "tex2lyx produces an out of date file format."
+#warning "Please update tex2lyx as soon as possible, since it depends implicitly"
+#warning "on the current file format in some places (this causes bugs like #7780)."
+#else
+#pragma message("warning: tex2lyx produces an out of date file format. " \
+ "Please update tex2lyx as soon as possible, since it depends implicitly " \
+ "on the current file format in some places (this causes bugs like #7780).")
+#endif
+#endif
+
+//} // namespace lyx