From: Jakub Jelinek <jakub at redhat dot com>
Subject: [PATCH] Set TREE_READONLY const POD arrays with size determined from initializer (PR c++/21454)

This is a fallout of the PR c++/20073 fix.
For arrays like:
const int a[] = { 0, 1, 2, 3 };
when cp_apply_type_quals_to_decl is called, its type is not complete yet,
so C++ frontend does not set TREE_READONLY flag.  But such variables
aren't put into incomplete_vars chain either, so nothing sets the flag
afterwards.

2005-05-11  Jakub Jelinek  <jakub@redhat.com>

	PR c++/21454
	* decl.c (maybe_deduce_size_from_array_init): Call
	cp_apply_type_quals_to_decl after completing array type.

	* g++.dg/opt/const4.C: New test.

--- gcc/gcc/cp/decl.c	2005-05-11 11:50:14.000000000 +0200
+++ gcc/gcc/cp/decl.c	2005-05-11 19:03:28.000000000 +0200
@@ -3933,6 +3933,8 @@ maybe_deduce_size_from_array_init (tree 
       if (failure == 3)
 	error ("zero-size array %qD", decl);
 
+      cp_apply_type_quals_to_decl (cp_type_quals (TREE_TYPE (decl)), decl);
+
       layout_decl (decl, 0);
     }
 }