title: Package gnuradio-core was not found
body: <p>I am trying to run <code>configure</code>command for <code>gnuradio-802.15.4-demodulation</code> file downloaded from github.</p>
  <p>It is showing these error.</p>
  <blockquote>
  <p>checking for gnuradio-core &gt;= 2... Package gnuradio-core was not found in the pkg-config search path. Perhaps you should add the directory containing `gnuradio-core.pc' to the PKG_CONFIG_PATH environment variable No package 'gnuradio-core' found</p>
  <p>configure: error: Library requirements (gnuradio-core &gt;= 2) not met; consider adjusting the PKG_CONFIG_PATH environment variable if your libraries are in a nonstandard prefix so pkg-config can find them.</p>
  </blockquote>
  <p>i have already installed <code>gnuradio-companion</code> and its working well.</p>
  <p>I do not much programming and kindly tell what is the problem in simple terms and what correction i should make?</p>