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From: "howarth at bromo dot med.uc.edu" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgomp/64625] ___OFFLOAD_TABLE__ symbol not produced on x86_64 darwin
Date: Fri, 16 Jan 2015 16:05:00 -0000
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X-Bugzilla-Component: libgomp
X-Bugzilla-Version: 5.0
X-Bugzilla-Keywords: openacc, openmp
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64625

--- Comment #6 from howarth at bromo dot med.uc.edu ---
The code producing this problematic symbol appears to be...

/* Holds a decl for __OFFLOAD_TABLE__.  */
static GTY(()) tree offload_symbol_decl;

/* Get the __OFFLOAD_TABLE__ symbol. */
static tree
get_offload_symbol_decl (void)
{
  if (!offload_symbol_decl)
    {
      tree decl = build_decl (UNKNOWN_LOCATION, VAR_DECL,
                              get_identifier ("__OFFLOAD_TABLE__"),
                              ptr_type_node);
      TREE_ADDRESSABLE (decl) = 1;
      TREE_PUBLIC (decl) = 1;
      DECL_EXTERNAL (decl) = 1;
      DECL_WEAK (decl) = 1;
      DECL_ATTRIBUTES (decl)
        = tree_cons (get_identifier ("weak"),
                     NULL_TREE, DECL_ATTRIBUTES (decl));
      offload_symbol_decl = decl;
    }
  return offload_symbol_decl;
}

in mop-low.c but get_offload_symbol_decl() is used to assign offload_table in
expand_omp_target().