[GitHub] KellenSunderland opened a new pull request #8406: Fixed rtc error on Tesla / Jetson TX2

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KellenSunderland opened a new pull request #8406: Fixed rtc error on Tesla / Jetson TX2
URL: https://github.com/apache/incubator-mxnet/pull/8406
 
 
   When rtc was run on a Tesla or Pascal device previously the user would receive an 'imports not found' error.  This was due to the fact that we were using compute capability 3 by default which was causing modern devices to fail to load a correct library.  We now will read from the first cuda capable device on the system  and use it's compute capability instead of the default.  If the user does specify a gpu architecture explicitly when calling rtc then we use the explicit value.
   
   ## Description ##
   Addresses:   #8387 
   
   ## Checklist ##
   ### Essentials ###
   - [x ] Passed code style checking (`make lint`)
   - [x ] Changes are complete (i.e. I finished coding on this PR)
   - [x] All changes have test coverage
   - [x] For user-facing API changes, API doc string has been updated.
   - [x] To my best knowledge, examples are either not affected by this change, or have been fixed to be compatible with this change
   
   @larroy Care to review cpp?

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