Objective-C++, Darwin : Make metadata 'extern "C"'.

For current system toolchains NeXT runtime metadata symbols are not
mangled for Objective-C++ (i.e. they are considered to be
'extern "C"').

This change becomes essential when we start to emit metadata refs
as hidden and weak which is required by later editions of the runtime
and linkers.

gcc/objc/ChangeLog:

	* objc-runtime-shared-support.c (start_var_decl): Make the
	decl_assembler_name follow the metadata name for C++ on NeXT
	runtime platforms.

diff --git a/gcc/objc/objc-runtime-shared-support.c b/gcc/objc/objc-runtime-shared-support.c
index 4aecc7f339ff9a1de9e381ad4c9bc8649c968e0d..16d4d63c86f3d6e67bbabbed3010e46afedbe6aa 100644 (file)
--- a/gcc/objc/objc-runtime-shared-support.c
+++ b/gcc/objc/objc-runtime-shared-support.c
@@ -117,14 +117,17 @@ add_field_decl (tree type, const char *name, tree **chain)
 tree
 start_var_decl (tree type, const char *name)
 {
-  tree var = build_decl (input_location,
-                        VAR_DECL, get_identifier (name), type);
-  TREE_STATIC (var) = 1;
+  tree name_id = get_identifier (name);
+  tree var = build_decl (input_location, VAR_DECL, name_id, type);
   DECL_INITIAL (var) = error_mark_node;  /* A real initializer is coming... */
+  TREE_STATIC (var) = 1;
   DECL_IGNORED_P (var) = 1;
   DECL_ARTIFICIAL (var) = 1;
   DECL_CONTEXT (var) = NULL_TREE;
 #ifdef OBJCPLUS
+  /* Meta-data for the NeXT runtime is expected to be 'extern "C"'.  */
+  if (flag_next_runtime)
+    SET_DECL_ASSEMBLER_NAME (var, name_id);
   DECL_THIS_STATIC (var) = 1; /* squash redeclaration errors */
 #endif
   return var;