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, 19 insertions, 0 deletions

diff --git a/gas/configure.ac b/gas/configure.ac
index 4a84f16..a639422 100644
--- a/gas/configure.ac
+++ b/gas/configure.ac
@@ -100,6 +100,20 @@ AC_ARG_ENABLE(elf_stt_common,
   yes)  ac_default_elf_stt_common=1 ;;
 esac])dnl
 
+
+# Decide if the ELF assembler should default to generating
+# GNU Build notes if none are provided by the input.
+ac_default_generate_build_notes=0
+# Provide a configuration option to override the default.
+AC_ARG_ENABLE(generate_build_notes,
+	      AS_HELP_STRING([--enable-generate-build-notes],
+	      [generate GNU Build notes if none are provided by the input]),
+[case "${enableval}" in
+  yes)  ac_default_generate_build_notes=1 ;;
+  no)   ac_default_generate_build_notes=0 ;;
+esac])dnl
+
+
 using_cgen=no
 
 AM_BINUTILS_WARNINGS
@@ -596,6 +610,11 @@ AC_DEFINE_UNQUOTED(DEFAULT_GENERATE_ELF_STT_COMMON,
   [Define to 1 if you want to generate ELF common symbols with the
    STT_COMMON type by default.])
 
+AC_DEFINE_UNQUOTED(DEFAULT_GENERATE_BUILD_NOTES,
+  $ac_default_generate_build_notes,
+  [Define to 1 if you want to generate GNU Build attribute notes
+   by default, if none are contained in the input.])
+
 if test x$ac_default_compressed_debug_sections = xyes ; then
   AC_DEFINE(DEFAULT_FLAG_COMPRESS_DEBUG, 1, [Define if you want compressed debug sections by default.])
 fi