link with -rdynamic on Linux

gyp/common_conditions.gypi

 # Copyright 2015 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # conditions used in both common.gypi and skia.gyp in chromium
 #
 {
   'defines': [
     'SK_ALLOW_STATIC_GLOBAL_INITIALIZERS=<(skia_static_initializers)',
@@ skipping 221 matching lines @@
           '-Wsign-compare',
 
           '-Wno-unused-parameter',
         ],
         'cflags_cc': [
           '-std=c++11',
           '-fno-rtti',
           '-fno-threadsafe-statics',
           '-Wnon-virtual-dtor',
         ],
+        'ldflags': [ '-rdynamic' ],
         'conditions': [
           [ 'skia_fast', { 'cflags': [ '<@(skia_fast_flags)' ] }],
           [ 'skia_os != "chromeos"', {
             'conditions': [
               [ 'skia_arch_type == "x86_64" and not skia_android_framework', {
                 'cflags': [
                   '-m64',
                 ],
                 'ldflags': [
                   '-m64',
@@ skipping 424 matching lines @@
           'LD_RUNPATH_SEARCH_PATHS': ['@executable_path/.'],
       },
     }],
 
   ], # end 'conditions'
   # The Xcode SYMROOT must be at the root. See build/common.gypi in chromium for more details
   'xcode_settings': {
     'SYMROOT': '<(DEPTH)/xcodebuild',
   },
 }