[GitHub] [incubator-mxnet] leezu edited a comment on pull request #18801: [submodule] Upgrade to oneDNN v1.6

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leezu edited a comment on pull request #18801:
URL: https://github.com/apache/incubator-mxnet/pull/18801#issuecomment-669293331


   @bgawrych Ubuntu bumped GCC 7 version to 7.4 in April 2019. You can still install the older version from the archives to verify, as the older files are still present in the apt repository (see http://security.ubuntu.com/ubuntu/pool/main/g/gcc-defaults/). Just run `apt` or `aptitude` and install the older version.
   
   Are you sure this is related to bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83204? That bug is, according to the bug tracker, only fixed in GCC 8 but not in GCC 7. It's not listed as part of the fixes for 7.4 and 7.5 (https://gcc.gnu.org/bugzilla/buglist.cgi?bug_status=RESOLVED&list_id=276490&resolution=FIXED&target_milestone=7.4 and https://gcc.gnu.org/bugzilla/buglist.cgi?bug_status=RESOLVED&list_id=276490&resolution=FIXED&target_milestone=7.5)
   
    Did your "On Ubuntu 18.04.4 LTS with gcc 7.5 MXNet is succesfully build." run with the master branch or the 1.x branch?
   
   In any case, CentOS CI uses the GCC 7 from https://www.softwarecollections.org/en/scls/rhscl/devtoolset-7/ We can report a bug and ask them to update to GCC 7.5 instead of 7.3. I opened https://bugzilla.redhat.com/show_bug.cgi?id=1866477 


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