--- binutils.orig/gas/dwarf2dbg.c	2021-01-18 15:02:20.322260068 +0000

+++ binutils-2.35.1/gas/dwarf2dbg.c	2021-01-18 15:04:20.078481127 +0000

@@ -537,7 +537,11 @@ dwarf2_gen_line_info (addressT ofs, stru

   if (loc->line == 0)

     return;

   if (loc->filenum == 0 && DWARF2_LINE_VERSION < 5)

-    return;

+    {

+      dwarf_level = 5;

+      if (DWARF2_LINE_VERSION < 5)

+       return;

+    }

   /* Don't emit sequences of line symbols for the same line when the

      symbols apply to assembler code.  It is necessary to emit

@@ -1030,9 +1034,13 @@ dwarf2_directive_filename (void)

   if ((offsetT) num < 1 && DWARF2_LINE_VERSION < 5)

     {

-      as_bad (_("file number less than one"));

-      ignore_rest_of_line ();

-      return NULL;

+      dwarf_level = 5;

+      if (DWARF2_LINE_VERSION < 5)

+       {

+         as_bad (_("file number less than one"));

+         ignore_rest_of_line ();

+         return NULL;

+       }

     }

   /* FIXME: Should we allow ".file <N>\n" as an expression meaning

@@ -1129,8 +1137,12 @@ dwarf2_directive_loc (int dummy ATTRIBUT

     {

       if (filenum != 0 || DWARF2_LINE_VERSION < 5)

 	{

-	  as_bad (_("file number less than one"));

-	  return;

+	  dwarf_level = 5;

+	  if (DWARF2_LINE_VERSION < 5)

+	    {

+	      as_bad (_("file number less than one"));

+	      return;

+	    }

 	}

     }