[Bug fortran/61418] [4.9/4.10 Regression] HDF5 build failure with -flto: libgfortran.spec: attempt to rename spec 'lib' to already defined spec 'liborig'

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61418

--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Index: gfortranspec.c
===================================================================
--- gfortranspec.c      (revision 211228)
+++ gfortranspec.c      (working copy)
@@ -449,12 +449,6 @@ For more information about these matters

 #endif

-  /* Read the specs file corresponding to libgfortran.
-     If we didn't find the spec file on the -L path, we load it
-     via lang_specific_pre_link.  */
-  if (spec_file)
-    append_option (OPT_specs_, spec_file, 1);
-
   if (verbose && g77_new_decoded_options != g77_x_decoded_options)
     {
       fprintf (stderr, _("Driving:"));
@@ -473,8 +467,17 @@ For more information about these matters
 int
 lang_specific_pre_link (void)
 {
-  free (spec_file);
-  if (spec_file == NULL && library)
+  if (!library)
+    return 0;
+
+  if (spec_file)
+    {
+      char cmd = asprintf (&cmd, "%%:include(%s)", spec_file);
+      do_spec (cmd);
+      free (cmd);
+      free (spec_file);
+    }
+  else if (library)
     do_spec ("%:include(libgfortran.spec)");

   return 0;