Fix gcc.dg/debug/pr41893-1.c with Solaris ld (PR lto/81968)

	PR lto/81968
	* simple-object.c (handle_lto_debug_sections): Keep .comment
	section.

From-SVN: r259364

libiberty/ChangeLog

+2018-04-13  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
+
+	PR lto/81968
+	* simple-object.c (handle_lto_debug_sections): Keep .comment
+	section.
+
 2018-03-02  David Malcolm  <dmalcolm@redhat.com>
 
 	* cp-demangle.c: Update URL for g++ V3 ABI.

libiberty/simple-object.c

@@ -284,6 +284,11 @@ handle_lto_debug_sections (const char *name)
   /* Copy over .note.GNU-stack section under the same name if present.  */
   else if (strcmp (name, ".note.GNU-stack") == 0)
     return strcpy (newname, name);
+  /* Copy over .comment section under the same name if present.  Solaris
+     ld uses them to relax its checking of ELF gABI access rules for
+     COMDAT sections in objects produced by GCC.  */
+  else if (strcmp (name, ".comment") == 0)
+    return strcpy (newname, name);
   return NULL;
 }