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diff --git a/gcc-4.2.1/gcc/c-objc-common.c b/gcc-4.2.1/gcc/c-objc-common.c
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+/* Some code common to C and ObjC front ends.
+ Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING. If not, write to the Free
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA. */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "tree.h"
+#include "rtl.h"
+#include "insn-config.h"
+#include "integrate.h"
+#include "c-tree.h"
+#include "c-pretty-print.h"
+#include "function.h"
+#include "flags.h"
+#include "toplev.h"
+#include "diagnostic.h"
+#include "tree-inline.h"
+#include "varray.h"
+#include "ggc.h"
+#include "langhooks.h"
+#include "tree-mudflap.h"
+#include "target.h"
+#include "c-objc-common.h"
+
+static bool c_tree_printer (pretty_printer *, text_info *, const char *,
+ int, bool, bool, bool);
+
+bool
+c_missing_noreturn_ok_p (tree decl)
+{
+ /* A missing noreturn is not ok for freestanding implementations and
+ ok for the `main' function in hosted implementations. */
+ return flag_hosted && MAIN_NAME_P (DECL_ASSEMBLER_NAME (decl));
+}
+
+/* We want to inline `extern inline' functions even if this would
+ violate inlining limits. Some glibc and linux constructs depend on
+ such functions always being inlined when optimizing. */
+
+int
+c_disregard_inline_limits (tree fn)
+{
+ if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) != NULL)
+ return 1;
+
+ return (!flag_really_no_inline && DECL_DECLARED_INLINE_P (fn)
+ && DECL_EXTERNAL (fn));
+}
+
+int
+c_cannot_inline_tree_fn (tree *fnp)
+{
+ tree fn = *fnp;
+ bool do_warning = (warn_inline
+ && DECL_INLINE (fn)
+ && DECL_DECLARED_INLINE_P (fn)
+ && !DECL_IN_SYSTEM_HEADER (fn));
+
+ if (flag_really_no_inline
+ && lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) == NULL)
+ {
+ if (do_warning)
+ warning (OPT_Winline, "function %q+F can never be inlined because it "
+ "is suppressed using -fno-inline", fn);
+ goto cannot_inline;
+ }
+
+ /* Don't auto-inline anything that might not be bound within
+ this unit of translation. */
+ if (!DECL_DECLARED_INLINE_P (fn) && !targetm.binds_local_p (fn))
+ {
+ if (do_warning)
+ warning (OPT_Winline, "function %q+F can never be inlined because it "
+ "might not be bound within this unit of translation", fn);
+ goto cannot_inline;
+ }
+
+ if (!function_attribute_inlinable_p (fn))
+ {
+ if (do_warning)
+ warning (OPT_Winline, "function %q+F can never be inlined because it "
+ "uses attributes conflicting with inlining", fn);
+ goto cannot_inline;
+ }
+
+ return 0;
+
+ cannot_inline:
+ DECL_UNINLINABLE (fn) = 1;
+ return 1;
+}
+
+/* Called from check_global_declarations. */
+
+bool
+c_warn_unused_global_decl (tree decl)
+{
+ if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl))
+ return false;
+ if (DECL_IN_SYSTEM_HEADER (decl))
+ return false;
+
+ return true;
+}
+
+/* Initialization common to C and Objective-C front ends. */
+bool
+c_objc_common_init (void)
+{
+ c_init_decl_processing ();
+
+ if (c_common_init () == false)
+ return false;
+
+ /* These were not defined in the Objective-C front end, but I'm
+ putting them here anyway. The diagnostic format decoder might
+ want an enhanced ObjC implementation. */
+ diagnostic_format_decoder (global_dc) = &c_tree_printer;
+
+ /* If still unspecified, make it match -std=c99
+ (allowing for -pedantic-errors). */
+ if (mesg_implicit_function_declaration < 0)
+ {
+ if (flag_isoc99)
+ mesg_implicit_function_declaration = flag_pedantic_errors ? 2 : 1;
+ else
+ mesg_implicit_function_declaration = 0;
+ }
+
+ return true;
+}
+
+/* Called during diagnostic message formatting process to print a
+ source-level entity onto BUFFER. The meaning of the format specifiers
+ is as follows:
+ %D: a general decl,
+ %E: an identifier or expression,
+ %F: a function declaration,
+ %T: a type.
+
+ These format specifiers form a subset of the format specifiers set used
+ by the C++ front-end.
+ Please notice when called, the `%' part was already skipped by the
+ diagnostic machinery. */
+static bool
+c_tree_printer (pretty_printer *pp, text_info *text, const char *spec,
+ int precision, bool wide, bool set_locus, bool hash)
+{
+ tree t = va_arg (*text->args_ptr, tree);
+ tree name;
+ const char *n = "({anonymous})";
+ c_pretty_printer *cpp = (c_pretty_printer *) pp;
+ pp->padding = pp_none;
+
+ if (precision != 0 || wide || hash)
+ return false;
+
+ if (set_locus && text->locus)
+ *text->locus = DECL_SOURCE_LOCATION (t);
+
+ switch (*spec)
+ {
+ case 'D':
+ if (DECL_DEBUG_EXPR_IS_FROM (t) && DECL_DEBUG_EXPR (t))
+ {
+ t = DECL_DEBUG_EXPR (t);
+ if (!DECL_P (t))
+ {
+ pp_c_expression (cpp, t);
+ return true;
+ }
+ }
+ /* FALLTHRU */
+
+ case 'F':
+ if (DECL_NAME (t))
+ n = lang_hooks.decl_printable_name (t, 2);
+ break;
+
+ case 'T':
+ gcc_assert (TYPE_P (t));
+ name = TYPE_NAME (t);
+
+ if (name && TREE_CODE (name) == TYPE_DECL)
+ {
+ if (DECL_NAME (name))
+ pp_string (cpp, lang_hooks.decl_printable_name (name, 2));
+ else
+ pp_type_id (cpp, t);
+ return true;
+ }
+ else
+ {
+ pp_type_id (cpp, t);
+ return true;
+ }
+ break;
+
+ case 'E':
+ if (TREE_CODE (t) == IDENTIFIER_NODE)
+ n = IDENTIFIER_POINTER (t);
+ else
+ {
+ pp_expression (cpp, t);
+ return true;
+ }
+ break;
+
+ default:
+ return false;
+ }
+
+ pp_string (cpp, n);
+ return true;
+}
+
+/* In C and ObjC, all decls have "C" linkage. */
+bool
+has_c_linkage (tree decl ATTRIBUTE_UNUSED)
+{
+ return true;
+}
+
+void
+c_initialize_diagnostics (diagnostic_context *context)
+{
+ pretty_printer *base = context->printer;
+ c_pretty_printer *pp = XNEW (c_pretty_printer);
+ memcpy (pp_base (pp), base, sizeof (pretty_printer));
+ pp_c_pretty_printer_init (pp);
+ context->printer = (pretty_printer *) pp;
+
+ /* It is safe to free this object because it was previously XNEW()'d. */
+ XDELETE (base);
+}
+
+int
+c_types_compatible_p (tree x, tree y)
+{
+ return comptypes (TYPE_MAIN_VARIANT (x), TYPE_MAIN_VARIANT (y));
+}
+
+/* Determine if the type is a vla type for the backend. */
+
+bool
+c_vla_unspec_p (tree x, tree fn ATTRIBUTE_UNUSED)
+{
+ return c_vla_type_p (x);
+}