title: Updating libstdc++.so.6 to GLIBCXX_3.4.21 and CXXABI_1.3.9 after updating to gcc 7.3
body: <p>I have a RHEL server (Maipo), and I did the Installing gcc 7.3 (gcc 7.3.0) - released 01/25/2018. For installing gcc, I followed <a href="https://stackoverflow.com/questions/36327805/how-to-install-gcc-5-3-with-yum-on-centos-7-2">How to Install gcc 5.3 with yum on CentOS 7.2?</a> </p>
  
  <p>However, when installing some software I need (that require gcc>4.9) still I am having issues with the g++ libraries. I had assumed that compiling gcc as indicated should have provided the right libraries? But I am getting:</p>
  
  <pre><code>/lib64/libstdc++.so.6: version CXXABI_1.3.9' not found 
  /lib64/libstdc++.so.6: versionGLIBCXX_3.4.21' not found
  </code></pre>
  
  <p>That are still in the 4.8.5 version of g++ (libstdc++.so.6.0.19 - it is the only version there). I checked, and does not reach the 1.3.9 and 3.4.21.</p>
  
  <p>Due to my subscription to RedHat (academic server), I cannot access the developer tool pack - the one available for me goes back to gcc 4.8.5.</p>
  
  <p>If anybody has any idea of how to solve this, I would really appreciate your help. And apologies if it sounds stupid.</p>