invoke.texi (ARM Options): Update description of -mthumb-interwork.

	* doc/invoke.texi (ARM Options): Update description of
	-mthumb-interwork.

From-SVN: r174811

gcc/ChangeLog

+2011-06-08  Nick Clifton  <nickc@redhat.com>
+
+	* doc/invoke.texi (ARM Options): Update description of
+	-mthumb-interwork.
+
 2011-06-08  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* config/i386/driver-i386.c (host_detect_local_cpu): Support
@@ -48,7 +53,7 @@
 	to use gimple_val_nonnegative_real_p.
 	* gimple-fold.c (gimple_val_nonnegative_real_p): New function.
 	* gimple.h (gimple_val_nonnegative_real_p): New declaration.
-	
+
 2011-06-07  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* config/i386/i386.md (*movsf_internal): Optimize AVX check.

gcc/doc/invoke.texi

@@ -10180,10 +10180,11 @@ Generate reentrant, position independent code.  The default is
 @item -mthumb-interwork
 @opindex mthumb-interwork
 Generate code which supports calling between the ARM and Thumb
-instruction sets.  Without this option the two instruction sets cannot
-be reliably used inside one program.  The default is
-@option{-mno-thumb-interwork}, since slightly larger code is generated
-when @option{-mthumb-interwork} is specified.
+instruction sets.  Without this option, on pre-v5 architectures, the
+two instruction sets cannot be reliably used inside one program.  The
+default is @option{-mno-thumb-interwork}, since slightly larger code
+is generated when @option{-mthumb-interwork} is specified.  In AAPCS
+configurations this option is meaningless.
 
 @item -mno-sched-prolog
 @opindex mno-sched-prolog