- Make sure the VM actually asks for libdl when being linked.

runtime/vm/vm.gypi

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 {
   'variables': {
     'gen_source_dir': '<(SHARED_INTERMEDIATE_DIR)',
     'libgen_in_cc_file': '../lib/libgen_in.cc',
     'builtin_in_cc_file': '../bin/builtin_in.cc',
     'async_cc_file': '<(gen_source_dir)/async_gen.cc',
@@ skipping 44 matching lines @@
       ],
       'include_dirs': [
         '..',
       ],
       'conditions': [
         ['OS=="linux"', {
           'link_settings': {
             'libraries': [
               '-lpthread',
               '-lrt',
+              '-ldl',
             ],
           },
         }],
         ['OS=="android" and _toolset=="host"', {
           'link_settings': {
             'libraries': [
               '-lpthread',
               '-lrt',
+              '-ldl',
             ],
           },
         }],
         ['OS=="win"', {
           'sources/' : [
             ['exclude', 'gdbjit.cc'],
           ],
        }],
        ['dart_vtune_support==0', {
           'sources/' : [
@@ skipping 954 matching lines @@
             '--table_name', 'service',
             '--root_prefix', 'vm/service/',
             '<@(_sources)'
           ],
           'message': 'Generating ''<(service_cc_file)'' file.'
         },
       ]
     },
   ]
 }