access2rohit commented on issue #20088:
URL: 
https://github.com/apache/incubator-mxnet/issues/20088#issuecomment-810549007


   > The `libmxnet.so` must not depend on versions newer than
   > 
   > ```
   > GLIBC_2.17
   > CXXABI_1.3.7, CXXABI_TM_1 is also allowed
   > GLIBCXX_3.4.19
   > GCC_4.8.0
   > ```
   > 
   > By testing on Ubuntu 18, you can't enforce that. The resulting 
`libmxnet.so` may, for example, fail to run on Amazon Linux 1. That's why it's 
crucial to run the final check on CentOS 7.
   > 
   > You can refer to https://www.python.org/dev/peps/pep-0599/ for details.
   > 
   > We can of course manually confirm that above requirements are met by our 
`libmxnet.so`. However, if the CI can do it for us that will be easier and less 
error prone (many people may not know about the requirements)
   
   @leezu  I agree about the dependencies listed. Question: Do we still need to 
support Amazon Linux 1 ? Is it time to re-evaluate support for old OS versions 
like AL1? 


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