+Changes in version 1.49a:
+\f
+Changes in version 1.30:
+
+* `--defines' and `--graph' have now an optionnal argument which is the
+ output file name. `-d' and `-g' do not change, they do not take any
+ argument.
+
+* `%source_extension' and `%header_extension' are removed, failed
+ experiment.
+
+* Portability fixes.
+\f
+Changes in version 1.29, 2001-09-07:
+
+* The output file does not define const, as this caused problems when used
+ with common autoconfiguration schemes. If you still use ancient compilers
+ that lack const, compile with the equivalent of the C compiler option
+ `-Dconst='. autoconf's AC_C_CONST macro provides one way to do this.
+
+* Added `-g' and `--graph'.
+
+* The Bison manual is now distributed under the terms of the GNU FDL.
+
+* The input and the output files has automatically a similar extension.