install.texi (Building a cross compiler): Add requirements for Java cross compiler.

	* doc/install.texi (Building a cross compiler): Add requirements
	for Java cross compiler.

From-SVN: r124936

gcc/ChangeLog

+2007-05-21  David Daney  <ddaney@avtrex.com>
+
+	* doc/install.texi (Building a cross compiler): Add requirements
+	for Java cross compiler.
+
 2007-05-21  Andrew Pinski  <andrew_pinski@playstation.sony.com>
 
 	PR middle-end/31995

gcc/doc/install.texi

@@ -1767,6 +1767,13 @@ native compiler.  You can then use the native GCC compiler to build the
 cross compiler.  The installed native compiler needs to be GCC version
 2.95 or later.
 
+If the cross compiler is to be built with support for the Java
+programming language and the ability to compile .java source files is
+desired, the installed native compiler used to build the cross
+compiler needs to be the same GCC version as the cross compiler.  In
+addition the cross compiler needs to be configured with
+@option{--with-ecj-jar=@dots{}}.
+
 Assuming you have already installed a native copy of GCC and configured
 your cross compiler, issue the command @command{make}, which performs the
 following steps: