2020-08-03  Richard Biener  <rguenther@suse.de>

	PR lto/96385

libiberty/

	* simple-object-elf.c

	(simple_object_elf_copy_lto_debug_sections): Localize global

	UNDEFs and reuse the prevailing name.

--- libiberty/simple-object-elf.c

+++ libiberty/simple-object-elf.c

@@ -1467,6 +1467,11 @@ simple_object_elf_copy_lto_debug_sections (simple_object_read *sobj,

 		       && st_shndx < shnum

 		       && pfnret[st_shndx - 1] == -1)

 		discard = 1;

+	      /* We also need to remove global UNDEFs which can

+		 cause link fails later.  */

+	      else if (st_shndx == SHN_UNDEF

+		       && ELF_ST_BIND (*st_info) == STB_GLOBAL)

+		discard = 1;

 	      if (discard)

 		{