Add dlwrap.c to binutils to simulate dlopen/dlsym for gold plugin

binutils-2.20/bfd/plugin.c

 /* Plugin support for BFD.
    Copyright 2009
    Free Software Foundation, Inc.
 
    This file is part of BFD, the Binary File Descriptor library.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
    MA 02110-1301, USA.  */
 
 #include "config.h"
 #include "bfd.h"
 
 #if BFD_SUPPORTS_PLUGINS
 
 #include <assert.h>
-#include <dlfcn.h>
+#include "../dlwrap.h" // @LOCALMOD
 #include <stdarg.h>
 #include "plugin-api.h"
 #include "sysdep.h"
 #include "plugin.h"
 #include "libbfd.h"
 #include "libiberty.h"
 #include <dirent.h>
 
 #define bfd_plugin_close_and_cleanup                  _bfd_generic_close_and_cleanup
 #define bfd_plugin_bfd_free_cached_info               _bfd_generic_bfd_free_cached_info
@@ skipping 143 matching lines @@
 
 static int
 load_plugin (void)
 {
   char *plugin_dir;
   char *p;
   DIR *d;
   struct dirent *ent;
   int found = 0;
 
+  // @LOCALMOD-BEGIN
+  return try_load_plugin("LLVMgold");
+  // @LOCALMOD-END
+
   if (plugin_name)
     return try_load_plugin (plugin_name);
 
   if (plugin_program_name == NULL)
     return 0;
 
   plugin_dir = concat (BINDIR, "/../lib/bfd-plugins", NULL);
   p = make_relative_prefix (plugin_program_name,
                             BINDIR,
                             plugin_dir);
@@ skipping 311 matching lines @@
   BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
   BFD_JUMP_TABLE_WRITE (bfd_plugin),
   BFD_JUMP_TABLE_LINK (bfd_plugin),
   BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
 
   NULL,
 
   NULL                          /* backend_data.  */
 };
 #endif /* BFD_SUPPORTS_PLUGIN */