invoke.texi: Document default code model for 64-bit Linux.

2017-03-01  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* doc/invoke.texi: Document default code model for 64-bit Linux.

From-SVN: r245821

gcc/ChangeLog

+2017-03-01  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
+
+	* doc/invoke.texi: Document default code model for 64-bit Linux.
+
 2017-03-01  Aaron Sawdey  <acsawdey@linux.vnet.ibm.com>
 
 	PR target/79752

gcc/doc/invoke.texi

@@ -21166,7 +21166,8 @@ Generate PowerPC64 code for the small model: The TOC is limited to
 @item -mcmodel=medium
 @opindex mcmodel=medium
 Generate PowerPC64 code for the medium model: The TOC and other static
-data may be up to a total of 4G in size.
+data may be up to a total of 4G in size.  This is the default for 64-bit
+Linux.
 
 @item -mcmodel=large
 @opindex mcmodel=large