# How to build Tensorflow on Ubuntu 18.04

git clone https://github.com/tensorflow/tensorflow
cd tensorflow
git checkout tags/v2.3.1

./configure

ashvid@ashvid-MS-7C75:~/tensorflow$ ./configure
You have bazel 3.1.0 installed.
Please specify the location of python. [Default is /usr/bin/python3]:


Found possible Python library paths:
  /usr/lib/python3/dist-packages
  /usr/local/lib/python3.7/dist-packages
Please input the desired Python library path to use.  Default is [/usr/lib/python3/dist-packages]

Do you wish to build TensorFlow with OpenCL SYCL support? [y/N]: n
No OpenCL SYCL support will be enabled for TensorFlow.

Do you wish to build TensorFlow with ROCm support? [y/N]: n
No ROCm support will be enabled for TensorFlow.

Do you wish to build TensorFlow with CUDA support? [y/N]: y
CUDA support will be enabled for TensorFlow.

Do you wish to build TensorFlow with TensorRT support? [y/N]: y
TensorRT support will be enabled for TensorFlow.

Found CUDA 10.2 in:
    /usr/local/cuda-10.2/targets/x86_64-linux/lib
    /usr/local/cuda-10.2/targets/x86_64-linux/include
Found cuDNN 7 in:
    /usr/lib/x86_64-linux-gnu
    /usr/include
Found TensorRT 7 in:
    /usr/lib/x86_64-linux-gnu
    /usr/include/x86_64-linux-gnu


Please specify a list of comma-separated CUDA compute capabilities you want to build with.
You can find the compute capability of your device at: https://developer.nvidia.com/cuda-gpus. Each capability can be specified as "x.y" or "compute_xy" to include both virtual and binary GPU code, or as "sm_xy" to only include the binary code.
Please note that each additional compute capability significantly increases your build time and binary size, and that TensorFlow only supports compute capabilities >= 3.5 [Default is: 6.1]:3.5,6.1,7.0


Do you want to use clang as CUDA compiler? [y/N]: n
nvcc will be used as CUDA compiler.

Please specify which gcc should be used by nvcc as the host compiler. [Default is /usr/bin/gcc]:


Please specify optimization flags to use during compilation when bazel option "--config=opt" is specified [Default is -march=native -Wno-sign-compare]:


Would you like to interactively configure ./WORKSPACE for Android builds? [y/N]: n
Not configuring the WORKSPACE for Android builds.

Preconfigured Bazel build configs. You can use any of the below by adding "--config=<>" to your build command. See .bazelrc for more details.
--config=mkl         # Build with MKL support.
--config=monolithic   # Config for mostly static monolithic build.
--config=ngraph       # Build with Intel nGraph support.
--config=numa         # Build with NUMA support.
--config=dynamic_kernels # (Experimental) Build kernels into separate shared objects.
--config=v2           # Build TensorFlow 2.x instead of 1.x.
Preconfigured Bazel build configs to DISABLE default on features:
--config=noaws       # Disable AWS S3 filesystem support.
--config=nogcp       # Disable GCP support.
--config=nohdfs       # Disable HDFS support.
--config=nonccl       # Disable NVIDIA NCCL support.
Configuration finished

export TMP=/tmp
bazel build --config=opt --config=cuda //tensorflow/tools/pip_package:build_pip_package --verbose_failures

INFO: Elapsed time: 2031.837s, Critical Path: 201.68s
INFO: 8526 processes: 8526 local.
INFO: Build completed successfully, 8548 total actions

bazel-bin/tensorflow/tools/pip_package/build_pip_package /tmp/tensorflow_pkg/

ashvid@ashvid-MS-7C75:~/distr$ mv tensorflow-2.3.1-cp37-cp37m-cuda10.2-notrt-linux_x86_64.whl tensorflow-2.3.1-cp37-cp37m-linux_x86_64.whl
ashvid@ashvid-MS-7C75:~/distr$ pip3 install tensorflow-2.3.1-cp37-cp37m-linux_x86_64.whl
...
Successfully installed tensorflow-2.3.1

In [1]: import tensorflow as tf
2020-12-16 09:20:30.816523: I tensorflow/stream_executor/platform/default/dso_loader.cc:48] Successfully opened dynamic library libcudart.so.10.2