[Bug target/85238] [8 Regression] lto-wrapper: fatal error: simple_object_copy_lto_debug_sections not implemented: Invalid argument on Cygwin

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85238

--- Comment #13 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Sure, that works for me.

OK, something like this is apparently sufficient:

===================================================================
--- cgraphunit.c        (revision 259205)
+++ cgraphunit.c        (working copy)
@@ -2700,7 +2700,14 @@ symbol_table::finalize_compilation_unit
   if (!in_lto_p && g->have_offload)
     flag_generate_offload = 1;

-  if (!seen_error ())
+  /* FIXME: Disable debug info generation during the LGEN phase of LTO for
+     PE-COFF targets because the copy_lto_debug_sections operation of the
+     simple object support in libiberty is not implemented yet.  */
+  enum debug_info_levels saved_debug_info_level = debug_info_level;
+  if (TARGET_PECOFF && (flag_generate_lto || flag_generate_offload))
+    debug_info_level = DINFO_LEVEL_NONE;
+
+  if (debug_info_level > DINFO_LEVEL_NONE && !seen_error ())
     {
       /* Emit early debug for reachable functions, and by consequence,
         locally scoped symbols.  */
@@ -2716,6 +2723,8 @@ symbol_table::finalize_compilation_unit
   /* Finally drive the pass manager.  */
   compile ();

+  debug_info_level = saved_debug_info_level;
+
   timevar_pop (TV_CGRAPH);
 }