PR ld/13177
bfd/
	* elflink.c (_bfd_elf_gc_mark_rsec): Set symbol "mark".
	(elf_gc_sweep_symbol): Don't test plt/got refcounts, instead test
	"mark".  Hide undefweak too.  Clear def_regular and ref_regular.
	* elf-m10300.c (mn10300_elf_relocate_section): Ignore unresolved
	reloc errors from garbage-collected code.
	* elf32-arm.c (elf32_arm_relocate_section): Likewise.
	* elf32-bfin.c (bfin_relocate_section): Likewise.
	(bfinfdpic_relocate_section): Likewise.
	* elf32-cris.c (cris_elf_relocate_section): Likewise.
	* elf32-frv.c (elf32_frv_relocate_section): Likewise.
	* elf32-i386.c (elf_i386_relocate_section): Likewise.
	* elf32-m32r.c (m32r_elf_relocate_section): Likewise.
	* elf32-m68k.c (elf_m68k_relocate_section): Likewise.
	* elf32-ppc.c (ppc_elf_relocate_section): Likewise.
	* elf32-s390.c (elf_s390_relocate_section): Likewise.
	* elf32-sh.c (sh_elf_relocate_section): Likewise.
	* elf32-spu.c (spu_elf_relocate_section): Likewise.
	* elf32-tilepro.c (tilepro_elf_relocate_section): Likewise.
	* elf32-xtensa.c (elf_xtensa_relocate_section): Likewise.
	* elf64-alpha.c (elf64_alpha_relocate_section): Likewise.
	* elf64-ppc.c (ppc64_elf_relocate_section): Likewise.
	* elf64-s390.c (elf_s390_relocate_section): Likewise.
	* elf64-sh64.c (sh_elf64_relocate_section): Likewise.
	* elf64-x86-64.c (elf_x86_64_relocate_section): Likewise.
	* elfxx-sparc.c (_bfd_sparc_elf_relocate_section): Likewise.
	* elfxx-tilegx.c (tilegx_elf_relocate_section): Likewise.
ld/testsuite/
	* ld-elf/elf.exp: Move test for shared lib support..
	* lib/ld-lib.exp (check_shared_lib_support): ..to here. Add m68hc1*,
	and s/ms1/mt/.
	(check_gc_sections_available): Match hppa*64 not hppa64.  Comment.
	* ld-gc/libpersonality.s: New.
	* ld-gc/personality.s, * ld-gc/personality.d: New.
	* ld-gc/gc.exp: Run personality test.
diff --git a/bfd/elf64-alpha.c b/bfd/elf64-alpha.c
index 528476b..94ea685 100644
--- a/bfd/elf64-alpha.c
+++ b/bfd/elf64-alpha.c
@@ -4213,6 +4213,7 @@
       bfd_vma value;
       bfd_vma addend;
       bfd_boolean dynamic_symbol_p;
+      bfd_boolean unresolved_reloc = FALSE;
       bfd_boolean undef_weak_ref = FALSE;
       unsigned long r_type;
 
@@ -4294,7 +4295,6 @@
       else
 	{
 	  bfd_boolean warned;
-	  bfd_boolean unresolved_reloc;
 	  struct elf_link_hash_entry *hh;
 	  struct elf_link_hash_entry **sym_hashes = elf_sym_hashes (input_bfd);
 
@@ -4527,7 +4527,12 @@
 	    else if (info->shared
 		     && r_symndx != STN_UNDEF
 		     && (input_section->flags & SEC_ALLOC)
-		     && !undef_weak_ref)
+		     && !undef_weak_ref
+		     && !(unresolved_reloc
+			  && (_bfd_elf_section_offset (output_bfd, info,
+						       input_section,
+						       rel->r_offset)
+			      == (bfd_vma) -1)))
 	      {
 		if (r_type == R_ALPHA_REFLONG)
 		  {
@@ -4573,7 +4578,11 @@
 	  /* ??? .eh_frame references to discarded sections will be smashed
 	     to relocations against SHN_UNDEF.  The .eh_frame format allows
 	     NULL to be encoded as 0 in any format, so this works here.  */
-	  if (r_symndx == STN_UNDEF)
+	  if (r_symndx == STN_UNDEF
+	      || (unresolved_reloc
+		  && _bfd_elf_section_offset (output_bfd, info,
+					      input_section,
+					      rel->r_offset) == (bfd_vma) -1))
 	    howto = (elf64_alpha_howto_table
 		     + (r_type - R_ALPHA_SREL32 + R_ALPHA_REFLONG));
 	  goto default_reloc;