tm.texi.in (TARGET_OBJC_DECLARE_UNRESOLVED_CLASS_REFERENCE, [...]): Add @hooks.

gcc/
	* doc/tm.texi.in (TARGET_OBJC_DECLARE_UNRESOLVED_CLASS_REFERENCE,
	TARGET_OBJC_DECLARE_CLASS_DEFINITION): Add @hooks.
	(ASM_DECLARE_CLASS_REFERENCE, ASM_DECLARE_UNRESOLVED_REFERENCE):
	Remove.
	* doc/tm.texi: Regenerate.
	* config/darwin.h (ASM_OUTPUT_LABELREF): Remove special case for
	.objc_class_name_*.
	* config/darwin-c.c: Include target.h.
	(darwin_objc_declare_unresolved_class_reference): New function.
	(darwin_objc_declare_class_definition): New function.
	(TARGET_OBJC_DECLARE_UNRESOLVED_CLASS_REFERENCE): Define.
	(TARGET_OBJC_DECLARE_CLASS_DEFINITION): Define.

c-family/
	* c-target.def (objc_declare_unresolved_class_reference,
	objc_declare_class_definition): Add new hooks.

objc/
	* objc-next-runtime-abi-01.c: Do not include tm.h and output.h.
	Include c-family/c-target.h.
	(handle_next_class_ref): Rewrite to emit top-level asm statements.
	(handle_next_impent): Likewise.
	* objc/Make-lang.in: Fix dependencies for objc-next-runtime-abi-01.o.

From-SVN: r188793

1 files changed, 37 insertions, 37 deletions

diff --git a/gcc/objc/objc-next-runtime-abi-01.c b/gcc/objc/objc-next-runtime-abi-01.c
index 151930e..b60bd46 100644
--- a/gcc/objc/objc-next-runtime-abi-01.c
+++ b/gcc/objc/objc-next-runtime-abi-01.c
@@ -26,7 +26,6 @@ along with GCC; see the file COPYING3.  If not see
 #include "config.h"
 #include "system.h"
 #include "coretypes.h"
-#include "tm.h"
 #include "tree.h"
 
 #ifdef OBJCPLUS
@@ -49,7 +48,7 @@ along with GCC; see the file COPYING3.  If not see
 
 #include "ggc.h"
 #include "target.h"
-#include "output.h" /* for asm_out_file */
+#include "c-family/c-target.h"
 #include "tree-iterator.h"
 
 #include "objc-runtime-hooks.h"
@@ -2267,47 +2266,50 @@ generate_objc_symtab_decl (void)
 		   init_objc_symtab (TREE_TYPE (UOBJC_SYMBOLS_decl)));
 }
 
+/* Any target implementing NeXT ObjC m32 ABI has to ensure that objects
+   refer to, and define, symbols that enforce linkage of classes into the
+   executable image, preserving unix archive semantics.
+
+   At present (4.8), the only targets implementing this are Darwin; these
+   use top level asms to implement a scheme (see config/darwin-c.c).  The
+   latter method is a hack, but compatible with LTO see also PR48109 for
+   further discussion and other possible methods.  */
 
 static void
-handle_next_class_ref (tree chain)
+handle_next_class_ref (tree chain ATTRIBUTE_UNUSED)
 {
-  const char *name = IDENTIFIER_POINTER (TREE_VALUE (chain));
-  char *string = (char *) alloca (strlen (name) + 30);
-
-  sprintf (string, ".objc_class_name_%s", name);
-
-#ifdef ASM_DECLARE_UNRESOLVED_REFERENCE
-  ASM_DECLARE_UNRESOLVED_REFERENCE (asm_out_file, string);
-#else
-  return ; /* NULL build for targets other than Darwin.  */
-#endif
+  if (targetcm.objc_declare_unresolved_class_reference)
+    {
+      const char *name = IDENTIFIER_POINTER (TREE_VALUE (chain));
+      char *string = (char *) alloca (strlen (name) + 30);
+      sprintf (string, ".objc_class_name_%s", name);
+      targetcm.objc_declare_unresolved_class_reference (string);
+    }
 }
 
 static void
-handle_next_impent (struct imp_entry *impent)
+handle_next_impent (struct imp_entry *impent ATTRIBUTE_UNUSED)
 {
-  char buf[BUFSIZE];
-
-  switch (TREE_CODE (impent->imp_context))
+  if (targetcm.objc_declare_class_definition)
     {
-    case CLASS_IMPLEMENTATION_TYPE:
-      snprintf (buf, BUFSIZE, ".objc_class_name_%s",
-		IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context)));
-      break;
-    case CATEGORY_IMPLEMENTATION_TYPE:
-      snprintf (buf, BUFSIZE, "*.objc_category_name_%s_%s",
-		IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context)),
-		IDENTIFIER_POINTER (CLASS_SUPER_NAME (impent->imp_context)));
-      break;
-    default:
-      return;
-    }
+      char buf[BUFSIZE];
 
-#ifdef ASM_DECLARE_CLASS_REFERENCE
-  ASM_DECLARE_CLASS_REFERENCE (asm_out_file, buf);
-#else
-  return ; /* NULL build for targets other than Darwin.  */
-#endif
+      switch (TREE_CODE (impent->imp_context))
+	{
+	  case CLASS_IMPLEMENTATION_TYPE:
+	    snprintf (buf, BUFSIZE, ".objc_class_name_%s",
+		      IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context)));
+	    break;
+	  case CATEGORY_IMPLEMENTATION_TYPE:
+	    snprintf (buf, BUFSIZE, "*.objc_category_name_%s_%s",
+		      IDENTIFIER_POINTER (CLASS_NAME (impent->imp_context)),
+		      IDENTIFIER_POINTER (CLASS_SUPER_NAME (impent->imp_context)));
+	    break;
+	  default:
+	    return;
+	}
+      targetcm.objc_declare_class_definition (buf);
+    }
 }
 
 static void
@@ -2414,9 +2416,7 @@ objc_generate_v1_next_metadata (void)
 
   /* Dump the class references.  This forces the appropriate classes
      to be linked into the executable image, preserving unix archive
-     semantics.  This can be removed when we move to a more dynamically
-     linked environment.  */
-
+     semantics.  */
   for (chain = cls_ref_chain; chain; chain = TREE_CHAIN (chain))
     {
       handle_next_class_ref (chain);