larroy commented on a change in pull request #14534: [DOC] Update ubuntu 
install instructions from source
URL: https://github.com/apache/incubator-mxnet/pull/14534#discussion_r274217846
 
 

 ##########
 File path: docs/install/ubuntu_setup.md
 ##########
 @@ -170,44 +191,72 @@ If building on CPU and using OpenBLAS:
 ```bash
     git clone --recursive https://github.com/apache/incubator-mxnet.git
     cd incubator-mxnet
-    echo "USE_OPENCV = 1" >> ./config.mk
-    echo "USE_BLAS = openblas" >> ./config.mk
-    make -j $(nproc)
+```
+
+
+```bash
+    rm -rf build
+    mkdir -p build && cd build
+    cmake -GNinja \
+        -DUSE_CUDA=OFF \
+        -DUSE_MKL_IF_AVAILABLE=OFF \
+        -DCMAKE_CUDA_COMPILER_LAUNCHER=ccache \
 
 Review comment:
   needs to be enabled explicitly with this flag, is not default. I think we 
should enable it in our instructions to speed up development process. Otherwise 
it becomes an obscure trick.

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