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==== Current GNU Radio 3.9 March 2020 ====
 
==== Current GNU Radio 3.9 March 2020 ====
 
With the current ''master'' branch, logging got way easier. In your OOT module, just write:
 
With the current ''master'' branch, logging got way easier. In your OOT module, just write:
<syntaxhighlight lang="c++">
+
<syntaxhighlight lang="c++" line='line'>
 
GR_LOG_INFO(this->d_logger, "My INFO message");
 
GR_LOG_INFO(this->d_logger, "My INFO message");
 
</syntaxhighlight>
 
</syntaxhighlight>
for logging to the standard logger with level 'INFO'. More generally, we'd use:
 
<syntaxhighlight lang="c++">
 
GR_LOG_<LOGLEVEL>(this->d_logger, "My <LOGLEVEL> message");
 
</syntaxhighlight>
 
 
It is not necessary to apply any CMake changes or to include additional headers.
 
Be aware that
 
<syntaxhighlight lang="c++" inline>
 
this->d_logger
 
</syntaxhighlight>
 
implies that you call the logger within a class inherited from
 
<syntaxhighlight lang="c++" inline>gr::block</syntaxhighlight>.
 
  
 
== Logging from Python ==
 
== Logging from Python ==

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