title: Compiling error in GStreamer with ios 7+
body: <p>I am using GStreamer.framework (binary 1.4.5) downloaded <a href="http://gstreamer.freedesktop.org/data/pkg/ios/1.4.5/" rel="nofollow noreferrer">here</a></p>
  
  <p>I can able to run in deployment target iOS 6.0 but when I am trying to run in iOS 7.0, I am getting the linking error.</p>
  
  <p>The following is the errors I received:</p>
  
  <pre><code>Undefined symbols for architecture armv7:
    "_gst_bus_async_signal_func", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "__gst_fraction_type", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "__gst_debug_min", referenced from:
        -[GStreamerBackend dealloc] in GStreamerBackend.o
        -[GStreamerBackend capture] in GStreamerBackend.o
        -[GStreamerBackend getFrame:] in GStreamerBackend.o
        -[GStreamerBackend check_initialization_complete] in GStreamerBackend.o
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_gst_message_parse_state_changed", referenced from:
        _state_changed_cb in GStreamerBackend.o
    "_g_clear_error", referenced from:
        _error_cb in GStreamerBackend.o
    "_gst_message_parse_error", referenced from:
        _error_cb in GStreamerBackend.o
    "_gst_element_get_bus", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_g_free", referenced from:
        _error_cb in GStreamerBackend.o
        _state_changed_cb in GStreamerBackend.o
    "_gst_pipeline_new", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_g_logv", referenced from:
        _g_warning in GStreamerBackend.o
    "_g_main_context_push_thread_default", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_gst_element_factory_make", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_gst_element_link_many", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_gst_sample_get_caps", referenced from:
        -[GStreamerBackend capture] in GStreamerBackend.o
        -[GStreamerBackend getFrame:] in GStreamerBackend.o
    "_gst_bin_get_type", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_gst_object_unref", referenced from:
        -[GStreamerBackend dealloc] in GStreamerBackend.o
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_g_source_set_callback", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_g_main_loop_new", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_gst_video_overlay_get_type", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_g_source_attach", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_g_signal_connect_data", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_g_main_loop_run", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_g_strdup_printf", referenced from:
        _error_cb in GStreamerBackend.o
        _state_changed_cb in GStreamerBackend.o
    "_gst_bus_create_watch", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_gst_sample_get_buffer", referenced from:
        -[GStreamerBackend capture] in GStreamerBackend.o
        -[GStreamerBackend getFrame:] in GStreamerBackend.o
    "_g_main_context_unref", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_gst_buffer_map", referenced from:
        -[GStreamerBackend capture] in GStreamerBackend.o
        -[GStreamerBackend getFrame:] in GStreamerBackend.o
    "_gst_mini_object_unref", referenced from:
        _gst_sample_unref in GStreamerBackend.o
    "_g_print", referenced from:
        -[GStreamerBackend getFrame:] in GStreamerBackend.o
    "_g_type_check_instance_cast", referenced from:
        -[GStreamerBackend capture] in GStreamerBackend.o
        -[GStreamerBackend getFrame:] in GStreamerBackend.o
        -[GStreamerBackend app_function] in GStreamerBackend.o
        _state_changed_cb in GStreamerBackend.o
    "_gst_buffer_unmap", referenced from:
        -[GStreamerBackend getFrame:] in GStreamerBackend.o
    "_gst_debug_set_threshold_for_name", referenced from:
        -[GStreamerBackend init:videoView:] in GStreamerBackend.o
    "_gst_debug_set_colored", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_gst_element_state_get_name", referenced from:
        _state_changed_cb in GStreamerBackend.o
    "_gst_bin_add_many", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_g_object_get", referenced from:
        -[GStreamerBackend capture] in GStreamerBackend.o
        -[GStreamerBackend getFrame:] in GStreamerBackend.o
    "_g_main_context_new", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_gst_object_get_type", referenced from:
        _state_changed_cb in GStreamerBackend.o
    "_gst_structure_get_int", referenced from:
        -[GStreamerBackend capture] in GStreamerBackend.o
        -[GStreamerBackend getFrame:] in GStreamerBackend.o
    "_gst_element_set_state", referenced from:
        -[GStreamerBackend dealloc] in GStreamerBackend.o
        -[GStreamerBackend play] in GStreamerBackend.o
        -[GStreamerBackend pause] in GStreamerBackend.o
        -[GStreamerBackend app_function] in GStreamerBackend.o
        _error_cb in GStreamerBackend.o
    "_gst_video_overlay_set_window_handle", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_gst_debug_log", referenced from:
        -[GStreamerBackend dealloc] in GStreamerBackend.o
        -[GStreamerBackend capture] in GStreamerBackend.o
        -[GStreamerBackend getFrame:] in GStreamerBackend.o
        -[GStreamerBackend check_initialization_complete] in GStreamerBackend.o
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_gst_bin_get_by_interface", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_gst_caps_get_structure", referenced from:
        -[GStreamerBackend capture] in GStreamerBackend.o
        -[GStreamerBackend getFrame:] in GStreamerBackend.o
    "_gst_caps_to_string", referenced from:
        -[GStreamerBackend capture] in GStreamerBackend.o
        -[GStreamerBackend getFrame:] in GStreamerBackend.o
    "_gst_video_convert_sample", referenced from:
        -[GStreamerBackend capture] in GStreamerBackend.o
        -[GStreamerBackend getFrame:] in GStreamerBackend.o
    "_g_object_set", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_gst_caps_new_simple", referenced from:
        -[GStreamerBackend capture] in GStreamerBackend.o
        -[GStreamerBackend getFrame:] in GStreamerBackend.o
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "__gst_debug_category_new", referenced from:
        -[GStreamerBackend init:videoView:] in GStreamerBackend.o
    "_g_main_loop_unref", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_g_main_context_pop_thread_default", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
    "_g_source_unref", referenced from:
        -[GStreamerBackend app_function] in GStreamerBackend.o
  ld: symbol(s) not found for architecture armv7
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  </code></pre>
  
  <p>How can I clear this error. I want to run this <code>GStreamer</code> in iOS 7+.</p>
  
  <p><strong>ADDITIONAL INFORMATION:</strong></p>
  
  <p>Libraries linked:</p>
  
  <ol>
  <li>GStreamer.framework (location: </li>
  </ol>
  
  <blockquote>
    <p>~/Library/Developer/GStreamer/iPhone.sdk/)</p>
  </blockquote>
  
  <ol start="2">
  <li>UIKit </li>
  <li>Foundation</li>
  <li>CoreGraphics</li>
  <li>GLKit</li>
  <li>OpenGLES</li>
  <li>VideoToolbox</li>
  <li>libiconv.dylib</li>
  </ol>
  
  <p>Here is my Architecture settings:
  <img src="https://i.stack.imgur.com/U0kPs.png" alt="enter image description here"></p>
  
  <p>Here is my linking flags:
  <img src="https://i.stack.imgur.com/m99u4.png" alt="enter image description here"></p>
  
  <p>Here is my framework and header paths:
  <img src="https://i.stack.imgur.com/c1y29.png" alt="enter image description here"></p>