config.gcc (need_64bit_hwint): Document libcpp dependency.

2008-05-02  David S. Miller  <davem@davemloft.net>

	* config.gcc (need_64bit_hwint): Document libcpp dependency.

From-SVN: r134898

gcc/ChangeLog

+2008-05-02  David S. Miller  <davem@davemloft.net>
+
+	* config.gcc (need_64bit_hwint): Document libcpp dependency.
+
 2008-05-02  Simon Baldwin <simonb@google.com>
 
 	PR bootstrap/36108

gcc/config.gcc

@@ -141,6 +141,8 @@
 #  need_64bit_hwint	Set to yes if HOST_WIDE_INT must be 64 bits wide
 #			for this target.  This is true iff this target
 #			supports "long" or "wchar_t" wider than 32 bits.
+#			The setting made here must match the one made in
+#			other locations such as libcpp/configure.ac
 #
 #  configure_default_options
 #			Set to an initializer for configure_default_options