Extend the assembler so that it can automatically generate GNU Build attribute notes if none are present in the input files.

gas	* as.c (flag_generate_build_notes): New variable.
	(show_usage): Add entry for --generate-missing-build-notes.
	(parse_args): Parse --generate-missing-build-notes.
	* as.h: Export flag_generate_build_notes.
	* symbols.c (save_symbol_name): Ensure that the name parameter is
	not NULL.
	* write.c (create_obj_attrs_section): Reformat.
	(create_note_reloc): New function - creates a relocation for a
	field in a GNU Build attribute note.
	(maybe_generate_build_notes): New function - created GNU Build
	attribute notes if none are present in the output file.
	(write_object_file): Call maybe_generate_build_notes.
	* configure.ac (--enable-generate-build-notes): New option.
	* NEWS: Announce the new feature.
	* doc/as.textinfo: Document the new option.
	* config.in: Regenerate.
	* configure: Regenerate.

binutils* readelf.c (is_32bit_abs_reloc): Support R_PARISC_DIR32 as a
	32-bit absolute reloc for the HPPA target.
	* testsuite/binutils-all/note-5.d: New test.
	* testsuite/binutils-all/note-5.s: Source file for new test.
	* testsuite/binutils-all/objcopy.exp: Run new test.

1 files changed, 27 insertions, 1 deletions

diff --git a/gas/as.c b/gas/as.c
index 6e8ec56..cdf8cfe 100644
--- a/gas/as.c
+++ b/gas/as.c
@@ -97,6 +97,7 @@ int verbose = 0;
 
 #if defined OBJ_ELF || defined OBJ_MAYBE_ELF
 int flag_use_elf_stt_common = DEFAULT_GENERATE_ELF_STT_COMMON;
+bfd_boolean flag_generate_build_notes = DEFAULT_GENERATE_BUILD_NOTES;
 #endif
 
 /* Keep the output file.  */
@@ -304,8 +305,19 @@ Options:\n\
                           generate ELF common symbols with STT_COMMON type\n"));
   fprintf (stream, _("\
   --sectname-subst        enable section name substitution sequences\n"));
+
+  fprintf (stream, _("\
+  --generate-missing-build-notes=[no|yes] "));
+#if DEFAULT_GENERATE_BUILD_NOTES
+  fprintf (stream, _("(default: yes)\n"));
+#else
+  fprintf (stream, _("(default: no)\n"));
 #endif
   fprintf (stream, _("\
+                          generate GNU Build notes if none are present in the input\n"));
+#endif /* OBJ_ELF */
+
+  fprintf (stream, _("\
   -f                      skip whitespace and comment preprocessing\n"));
   fprintf (stream, _("\
   -g --gen-debug          generate debugging information\n"));
@@ -470,6 +482,7 @@ parse_args (int * pargc, char *** pargv)
       OPTION_NOEXECSTACK,
       OPTION_SIZE_CHECK,
       OPTION_ELF_STT_COMMON,
+      OPTION_ELF_BUILD_NOTES,
       OPTION_SECTNAME_SUBST,
       OPTION_ALTERNATE,
       OPTION_AL,
@@ -508,6 +521,7 @@ parse_args (int * pargc, char *** pargv)
     ,{"size-check", required_argument, NULL, OPTION_SIZE_CHECK}
     ,{"elf-stt-common", required_argument, NULL, OPTION_ELF_STT_COMMON}
     ,{"sectname-subst", no_argument, NULL, OPTION_SECTNAME_SUBST}
+    ,{"generate-missing-build-notes", required_argument, NULL, OPTION_ELF_BUILD_NOTES}
 #endif
     ,{"fatal-warnings", no_argument, NULL, OPTION_WARN_FATAL}
     ,{"gdwarf-2", no_argument, NULL, OPTION_GDWARF2}
@@ -900,7 +914,19 @@ This program has absolutely no warranty.\n"));
 	case OPTION_SECTNAME_SUBST:
 	  flag_sectname_subst = 1;
 	  break;
-#endif
+
+	case OPTION_ELF_BUILD_NOTES:
+	  if (strcasecmp (optarg, "no") == 0)
+	    flag_generate_build_notes = FALSE;
+	  else if (strcasecmp (optarg, "yes") == 0)
+	    flag_generate_build_notes = TRUE;
+	  else
+	    as_fatal (_("Invalid --generate-missing-build-notes option: `%s'"),
+		      optarg);
+	  break;
+
+#endif /* OBJ_ELF */
+
 	case 'Z':
 	  flag_always_generate_output = 1;
 	  break;