2020-05-12  Douglas B Rupp  <rupp@adacore.com>

	* include/bfdlink.h (aix_gc): New boolean
	* ld/emultempl/aix.em (gld${EMULATION_NAME}_add_options): Set it.
	* ld/ldlang.c (print_one_symbol): Output gc'd symbol info to map file


diff --git include/bfdlink.h include/bfdlink.h
index 773407f861..e00b6fcd76 100644
--- include/bfdlink.h
+++ include/bfdlink.h
@@ -498,6 +498,9 @@ struct bfd_link_info
   /* TRUE if common symbols should be treated as undefined.  */
   unsigned int inhibit_common_definition : 1;
 
+  /* TRUE if AIX style XCOFF garbage collection is ok.  */
+  unsigned int aix_gc: 1;
+
   /* The 1-byte NOP for x86 call instruction.  */
   char call_nop_byte;
 
diff --git ld/emultempl/aix.em ld/emultempl/aix.em
index 92f59f28ed..b9145c2d6f 100644
--- ld/emultempl/aix.em
+++ ld/emultempl/aix.em
@@ -271,6 +271,8 @@ gld${EMULATION_NAME}_add_options
   *longopts = xrealloc (*longopts,
 			nl * sizeof (struct option) + sizeof (xtra_long));
   memcpy (*longopts + nl, &xtra_long, sizeof (xtra_long));
+
+  link_info.aix_gc = TRUE;
 }
 
 static bfd_boolean
diff --git ld/ldlang.c ld/ldlang.c
index 21ef9bea2b..b5b67b4df8 100644
--- ld/ldlang.c
+++ ld/ldlang.c
@@ -4140,6 +4140,11 @@ print_one_symbol (struct bfd_link_hash_entry *hash_entry, void *ptr)
 	      + hash_entry->u.def.section->output_offset
 	      + hash_entry->u.def.section->output_section->vma));
 
+      if (link_info.aix_gc && hash_entry->u.def.section->size == 0)
+	minfo (" -->gc 0x%V   ",
+	       (hash_entry->u.def.section->output_offset
+                + hash_entry->u.def.section->output_section->vma));
+
       minfo ("             %pT\n", hash_entry->root.string);
     }