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, 26 insertions, 2 deletions

diff --git a/gas/configure b/gas/configure
index a45e531fec3..ea6b3b16a86 100755
--- a/gas/configure
+++ b/gas/configure
@@ -771,6 +771,7 @@ enable_checking
 enable_compressed_debug_sections
 enable_x86_relax_relocations
 enable_elf_stt_common
+enable_generate_build_notes
 enable_werror
 enable_build_warnings
 with_cpu
@@ -1426,6 +1427,9 @@ Optional Features:
                           generate x86 relax relocations by default
   --enable-elf-stt-common generate ELF common symbols with STT_COMMON type by
                           default
+  --enable-generate-build-notes
+                          generate GNU Build notes if none are provided by the
+                          input
   --enable-werror         treat compile warnings as errors
   --enable-build-warnings enable build-time compiler warnings
   --disable-nls           do not use Native Language Support
@@ -10987,7 +10991,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10990 "configure"
+#line 10994 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11093,7 +11097,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 11096 "configure"
+#line 11100 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11747,6 +11751,20 @@ if test "${enable_elf_stt_common+set}" = set; then :
 esac
 fi
 
+
+# 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.
+# Check whether --enable-generate_build_notes was given.
+if test "${enable_generate_build_notes+set}" = set; then :
+  enableval=$enable_generate_build_notes; case "${enableval}" in
+  yes)  ac_default_generate_build_notes=1 ;;
+  no)   ac_default_generate_build_notes=0 ;;
+esac
+fi
+
+
 using_cgen=no
 
 
@@ -12670,6 +12688,12 @@ cat >>confdefs.h <<_ACEOF
 _ACEOF
 
 
+
+cat >>confdefs.h <<_ACEOF
+#define DEFAULT_GENERATE_BUILD_NOTES $ac_default_generate_build_notes
+_ACEOF
+
+
 if test x$ac_default_compressed_debug_sections = xyes ; then
 
 $as_echo "#define DEFAULT_FLAG_COMPRESS_DEBUG 1" >>confdefs.h