bfd:

	* elf32-ppc.c (ppc_elf_merge_obj_attributes): New.
	(ppc_elf_merge_private_bfd_data): Call it.

binutils:
	* readelf.c (display_power_gnu_attribute, process_power_specific):
	New.
	(process_arch_specific): Call process_power_specific.

include/elf:
	* ppc.h (Tag_GNU_Power_ABI_FP): Define.

ld/testsuite:
	* ld-powerpc/attr-gnu-4-0.s, ld-powerpc/attr-gnu-4-00.d,
	ld-powerpc/attr-gnu-4-01.d, ld-powerpc/attr-gnu-4-02.d,
	ld-powerpc/attr-gnu-4-1.s, ld-powerpc/attr-gnu-4-10.d,
	ld-powerpc/attr-gnu-4-11.d, ld-powerpc/attr-gnu-4-12.d,
	ld-powerpc/attr-gnu-4-13.d, ld-powerpc/attr-gnu-4-2.s,
	ld-powerpc/attr-gnu-4-20.d, ld-powerpc/attr-gnu-4-21.d,
	ld-powerpc/attr-gnu-4-22.d, ld-powerpc/attr-gnu-4-3.s,
	ld-powerpc/attr-gnu-4-31.d: New.
	* ld-powerpc/powerpc.exp: Run these new tests.

2 files changed, 64 insertions, 0 deletions

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index 92de3e5..bd2a82c 100644
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,5 +1,10 @@
 2007-06-29  Joseph Myers  <joseph@codesourcery.com>
 
+	* elf32-ppc.c (ppc_elf_merge_obj_attributes): New.
+	(ppc_elf_merge_private_bfd_data): Call it.
+
+2007-06-29  Joseph Myers  <joseph@codesourcery.com>
+
 	* elfxx-mips.c (mips_elf_merge_obj_attributes): New.
 	(_bfd_mips_elf_merge_private_bfd_data): Call it.
 
diff --git a/bfd/elf32-ppc.c b/bfd/elf32-ppc.c
index b84f0af..d67ad86 100644
--- a/bfd/elf32-ppc.c
+++ b/bfd/elf32-ppc.c
@@ -3594,6 +3594,62 @@ ppc_elf_check_relocs (bfd *abfd,
   return TRUE;
 }
 
+
+/* Merge object attributes from IBFD into OBFD.  Raise an error if
+   there are conflicting attributes.  */
+static bfd_boolean
+ppc_elf_merge_obj_attributes (bfd *ibfd, bfd *obfd)
+{
+  obj_attribute *in_attr;
+  obj_attribute *out_attr;
+
+  if (!elf_known_obj_attributes_proc (obfd)[0].i)
+    {
+      /* This is the first object.  Copy the attributes.  */
+      _bfd_elf_copy_obj_attributes (ibfd, obfd);
+
+      /* Use the Tag_null value to indicate the attributes have been
+	 initialized.  */
+      elf_known_obj_attributes_proc (obfd)[0].i = 1;
+
+      return TRUE;
+    }
+
+  /* Check for conflicting Tag_GNU_Power_ABI_FP attributes and merge
+     non-conflicting ones.  */
+  in_attr = elf_known_obj_attributes (ibfd)[OBJ_ATTR_GNU];
+  out_attr = elf_known_obj_attributes (obfd)[OBJ_ATTR_GNU];
+  if (in_attr[Tag_GNU_Power_ABI_FP].i != out_attr[Tag_GNU_Power_ABI_FP].i)
+    {
+      out_attr[Tag_GNU_Power_ABI_FP].type = 1;
+      if (out_attr[Tag_GNU_Power_ABI_FP].i == 0)
+	out_attr[Tag_GNU_Power_ABI_FP].i = in_attr[Tag_GNU_Power_ABI_FP].i;
+      else if (in_attr[Tag_GNU_Power_ABI_FP].i == 0)
+	;
+      else if (out_attr[Tag_GNU_Power_ABI_FP].i == 1
+	       && in_attr[Tag_GNU_Power_ABI_FP].i == 2)
+	_bfd_error_handler
+	  (_("Warning: %B uses hard float, %B uses soft float"), obfd, ibfd);
+      else if (out_attr[Tag_GNU_Power_ABI_FP].i == 2
+	       && in_attr[Tag_GNU_Power_ABI_FP].i == 1)
+	_bfd_error_handler
+	  (_("Warning: %B uses hard float, %B uses soft float"), ibfd, obfd);
+      else if (in_attr[Tag_GNU_Power_ABI_FP].i > 2)
+	_bfd_error_handler
+	  (_("Warning: %B uses unknown floating point ABI %d"), ibfd,
+	   in_attr[Tag_GNU_Power_ABI_FP].i);
+      else
+	_bfd_error_handler
+	  (_("Warning: %B uses unknown floating point ABI %d"), obfd,
+	   out_attr[Tag_GNU_Power_ABI_FP].i);
+    }
+
+  /* Merge Tag_compatibility attributes and any common GNU ones.  */
+  _bfd_elf_merge_object_attributes (ibfd, obfd);
+
+  return TRUE;
+}
+
 /* Merge backend specific data from an object file to the output
    object file when linking.  */
 
@@ -3612,6 +3668,9 @@ ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
   if (! _bfd_generic_verify_endian_match (ibfd, obfd))
     return FALSE;
 
+  if (!ppc_elf_merge_obj_attributes (ibfd, obfd))
+    return FALSE;
+
   new_flags = elf_elfheader (ibfd)->e_flags;
   old_flags = elf_elfheader (obfd)->e_flags;
   if (!elf_flags_init (obfd))