[GitHub] [incubator-mxnet] xianyujie edited a comment on issue #15348: Is it possible to add environment variables directly to compilation options when compiling Mxnet？

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xianyujie edited a comment on issue #15348: Is it possible to add environment variables directly to compilation options when compiling Mxnet？
URL: https://github.com/apache/incubator-mxnet/issues/15348#issuecomment-505687785
 
 
   @vdantu I want to take part in the FRVT competition. They ask that mxnet runs in single-thread mode.
   ```
   Implementations must run in single-threaded mode, because NIST will parallelize the test 
   by dividing the workload across many cores and many machines. Implementations must ensure 
   that there are no issues with their software being parallelized via the fork() function. 
   Developers should take caution with checking threading when using third-party frameworks 
   (e.g., TensorFlow, MXNet, etc.).
   ```
   By setting the following steps, the mxnet could run in single-thread mode.
   ```
   compile mxnet with OPENMP=0 
   export OMP_NUM_THREADS=1
   export MXNET_ENGINE_TYPE=NaiveEngine
   ```
   How to make the value of MXNET_ENGINE_TYPE equal to NaiveEngine from the source code instead of using 'export'? I think it should be a switch_case or if_else statement to determine the value of type. Where is this code in the source code?

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