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=== In my OOT Module, I'm trying to use a GNU Radio block or class but get an ImportError "undefined symbol". What do I do? ===
 
=== In my OOT Module, I'm trying to use a GNU Radio block or class but get an ImportError "undefined symbol". What do I do? ===
  
You need to tell your OOT module to link against the right set of GNU Radio libraries. Basically, an OOT module is only told to link against RUNTIME, or libgnuradio-runtime.so. If you're using a class or block from another GNU Radio component, you'll need to add that component for proper linking. In your CMakeLists.txt file in the top-level directory of the OOT project, make sure to add whatever components you might need with this line:
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You need to tell your OOT module to link against the right set of GNU Radio libraries. Instructions are found in our [[OutOfTreeModulesConfig]] page.
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Basically, an OOT module is only told to link against RUNTIME, or libgnuradio-runtime.so. If you're using a class or block from another GNU Radio component, you'll need to add that component for proper linking. In your CMakeLists.txt file in the top-level directory of the OOT project, make sure to add whatever components you might need with this line:
  
 
<code>set(GR_REQUIRED_COMPONENTS RUNTIME <YOUR COMPONENTS>)</code>
 
<code>set(GR_REQUIRED_COMPONENTS RUNTIME <YOUR COMPONENTS>)</code>

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