[patch] document requirements for building gjdoc

[Matthias Klose]

The build of gjdoc was enabled with the merge of the classpath-0.98
merge branch.  This documents the requirements if you do want to build
gjdoc.

Ok for trunk?

  Matthias

gcc/

2008-10-26  Matthias Klose  <doko@ubuntu.com>

	* doc/install.texi: Document requirements on antlr.

Index: doc/install.texi
===================================================================
--- doc/install.texi	(revision 141372)
+++ doc/install.texi	(working copy)
@@ -448,6 +448,17 @@
 @uref{ftp://sourceware.org/pub/java/}, or by running the script
 @command{contrib/download_ecj}.
 
+@item antlr.jar version 2.7.1 (or later)
+@itemx antlr binary
+
+If you wish to build the @command{gjdoc} binary in libjava, you will
+need to have a @file{antlr.jar} library available. The library is
+searched in system locations but can be configured with
+@option{--with-antlr-jar=} instead.  When configuring with
+@option{--enable-java-maintainer-mode}, you will need to have one of
+the executables named @command{cantlr}, @command{runantlr} or
+@command{antlr} in your path.
+
 @end table
 
 @html