PR ld/12365

	PR ld/12672
bfd/
	* bfd.c (BFD_PLUGIN): Define.
	(BFD_FLAGS_SAVED, BFD_FLAGS_FOR_BFD_USE_MASK): Add BFD_PLUGIN.
	* bfd-in2.h: Regenerate.
	* elflink.c (elf_link_output_extsym): Strip undefined plugin syms.
	* opncls.c (bfd_make_readable): Don't lose original bfd flags.
ld/
	* ldfile.c (ldfile_try_open_bfd): Don't attempt any plugin action
	when no_more_claiming.
	* ldmain.c (add_archive_element): Likewise.
	(multiple_definition): Remove plugin_multiple_definition call.
	(notice): Remove plugin_notice call.
	* ldlang.c (lang_list_insert_after, void lang_list_remove_tail): Move.
	Delete prototype.
	(plugin_insert): New static var.
	(open_input_bfds): Only rescan libs after plugin insert point.
	(lang_gc_sections): Omit plugin claimed files.
	(lang_process): Set plugin_insert.  Only rescan when plugin adds
	objects.
	* plugin.h (no_more_claiming): Declare.
	(plugin_notice, plugin_multiple_definition): Don't declare.
	* plugin.c: Formatting.
	(orig_notice_all, orig_allow_multiple_defs, orig_callbacks,
	plugin_callbacks): New static vars.
	(no_more_claiming): Make global.
	(plugin_cached_allow_multiple_defs): Delete.
	(plugin_get_ir_dummy_bfd): Set SEC_EXCLUDE on dummy .text section,
	use newer bfd_make_section variant.  Make COMMON section too.
	Error handling.  Correct setting of gp size.
	(asymbol_from_plugin_symbol): Properly cast last arg of concat.
	(message): Likewise for ACONCAT.
	(asymbol_from_plugin_symbol): Use our COMMON section.
	(get_symbols): When report_plugin_symbols, show visibility too.
	(init_non_ironly_hash): Move.  Don't test non_ironly_hash.
	(plugin_load_plugins): Save state of linker callbacks, set up to
	call plugin_notice instead.  Call init_non_ironly_hash here.
	(plugin_call_all_symbols_read): Set plugin_multiple_definition in
	plugin callbacks.
	(plugin_notice): Rewrite.
	(plugin_multiple_definition): Make static, call original callback.
ld/testsuite/
	* ld-plugin/plugin-7.d: Adjust for plugin changes.
	* ld-plugin/plugin-8.d: Likewise.
	* ld-plugin/plugin.exp: Pass --verbose=2 for visibility test, and
	compare ld output to..
	* ld-plugin/plugin-12.d: New.

4 files changed, 16 insertions, 5 deletions

diff --git a/bfd/bfd-in2.h b/bfd/bfd-in2.h
index e7c410d..2c795b6 100644
--- a/bfd/bfd-in2.h
+++ b/bfd/bfd-in2.h
@@ -5110,14 +5110,17 @@ struct bfd
   /* Decompress sections in this BFD.  */
 #define BFD_DECOMPRESS 0x10000
 
+  /* BFD is a dummy, for plugins.  */
+#define BFD_PLUGIN 0x20000
+
   /* Flags bits to be saved in bfd_preserve_save.  */
 #define BFD_FLAGS_SAVED \
-  (BFD_IN_MEMORY | BFD_COMPRESS | BFD_DECOMPRESS)
+  (BFD_IN_MEMORY | BFD_COMPRESS | BFD_DECOMPRESS | BFD_PLUGIN)
 
   /* Flags bits which are for BFD use only.  */
 #define BFD_FLAGS_FOR_BFD_USE_MASK \
   (BFD_IN_MEMORY | BFD_COMPRESS | BFD_DECOMPRESS | BFD_LINKER_CREATED \
-   | BFD_TRADITIONAL_FORMAT | BFD_DETERMINISTIC_OUTPUT)
+   | BFD_PLUGIN | BFD_TRADITIONAL_FORMAT | BFD_DETERMINISTIC_OUTPUT)
 
   /* Currently my_archive is tested before adding origin to
      anything. I believe that this can become always an add of
diff --git a/bfd/bfd.c b/bfd/bfd.c
index 77582ec..c729d63 100644
--- a/bfd/bfd.c
+++ b/bfd/bfd.c
@@ -157,14 +157,17 @@ CODE_FRAGMENT
 .  {* Decompress sections in this BFD.  *}
 .#define BFD_DECOMPRESS 0x10000
 .
+.  {* BFD is a dummy, for plugins.  *}
+.#define BFD_PLUGIN 0x20000
+.
 .  {* Flags bits to be saved in bfd_preserve_save.  *}
 .#define BFD_FLAGS_SAVED \
-.  (BFD_IN_MEMORY | BFD_COMPRESS | BFD_DECOMPRESS)
+.  (BFD_IN_MEMORY | BFD_COMPRESS | BFD_DECOMPRESS | BFD_PLUGIN)
 .
 .  {* Flags bits which are for BFD use only.  *}
 .#define BFD_FLAGS_FOR_BFD_USE_MASK \
 .  (BFD_IN_MEMORY | BFD_COMPRESS | BFD_DECOMPRESS | BFD_LINKER_CREATED \
-.   | BFD_TRADITIONAL_FORMAT | BFD_DETERMINISTIC_OUTPUT)
+.   | BFD_PLUGIN | BFD_TRADITIONAL_FORMAT | BFD_DETERMINISTIC_OUTPUT)
 .
 .  {* Currently my_archive is tested before adding origin to
 .     anything. I believe that this can become always an add of
diff --git a/bfd/elflink.c b/bfd/elflink.c
index 9ccc841..2275503 100644
--- a/bfd/elflink.c
+++ b/bfd/elflink.c
@@ -8704,6 +8704,11 @@ elf_link_output_extsym (struct elf_link_hash_entry *h, void *data)
 	       || h->root.type == bfd_link_hash_defweak)
 	   && elf_discarded_section (h->root.u.def.section))
     strip = TRUE;
+  else if ((h->root.type == bfd_link_hash_undefined
+	    || h->root.type == bfd_link_hash_undefweak)
+	   && h->root.u.undef.abfd != NULL
+	   && (h->root.u.undef.abfd->flags & BFD_PLUGIN) != 0)
+    strip = TRUE;
   else
     strip = FALSE;
 
diff --git a/bfd/opncls.c b/bfd/opncls.c
index 3597dae..4043200 100644
--- a/bfd/opncls.c
+++ b/bfd/opncls.c
@@ -875,7 +875,7 @@ bfd_make_readable (bfd *abfd)
   abfd->section_count = 0;
   abfd->usrdata = NULL;
   abfd->cacheable = FALSE;
-  abfd->flags = BFD_IN_MEMORY;
+  abfd->flags |= BFD_IN_MEMORY;
   abfd->mtime_set = FALSE;
 
   abfd->target_defaulted = TRUE;