Build Addons for MacOS

[seanpmorgan]

Currently our template for custom-ops is designed for linux builds. We'll need to adapt our build setup to build for all operating systems.

https://github.com/tensorflow/custom-op

@yifeif @karmel When time allows after the summit, could we discuss the steps needed.

[hksonngan]

in Windows in tf.sysconfig.get_link_flags() return empty
and truncate if my username have space at line 38
I think we should check compile flags by build_ext

[seanpmorgan]

@yifeif bumping for your feedback, now that the summit is over and GPU op is in place on the custom-op repo. I noticed there is a crosstool build for nvcc on windows so I figured there's been some thought on this.

Without having dug too deeply on tensorflow/tensorflow BUILD, my first question is how does it work to lookup .so files? Shouldn't it be dependent on OS (i.e. dll/dylib/so)

[armando-fandango]

Doesn't autconf or ./configure figure out the dll/dylib/so dependencies ?

[armando-fandango]

pip install tf-nightly-2.0-preview fails on mac with the following error:
Could not find a version that satisfies the requirement tf-nightly-2.0-preview (from versions: )
No matching distribution found for tf-nightly-2.0-preview

[seanpmorgan]

Had some time to look at the tensorflow build wrappers. Seems like we'll need to do something along these lines for the multi OS build

https://github.com/tensorflow/tensorflow/blob/master/tensorflow/tensorflow.bzl#L599

[seanpmorgan]

Doesn't autconf or ./configure figure out the dll/dylib/so dependencies ?

Good point. Yeah the readlink or whatever we build with should discover the libtensorflow_framework, but the C++ ops we compile ourselves are currently hardcoded as .so files.

[ageron]

Tried installing from source on my Mac, as instructed on the home page, but it failed, first because the .so names are hardcoded. I renamed them to dylib. But then I ran into another issue:

In file included from tensorflow_addons/custom_ops/image/cc/kernels/euclidean_distance_transform_op.cc:22:
./tensorflow_addons/custom_ops/image/cc/kernels/euclidean_distance_transform_op.h:55:11: error: no viable conversion from 'Eigen::half' to 'float'
    float minDistance = std::numeric_limits<T>::max();
          ^             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

So I guess there's no way to install TensorFlow Addons on Mac or Windows for now, it's Linux only.

Side note for @armando-fandango: perhaps you are using Python 3.7? tf-nightly-2.0-preview and tf-nightly-2.0-gpu-preview are not available for Python 3.7, but they are available for Python 3.6. For some reason, TF 2.0 alpha0 is available for both Python 3.6 and 3.7.

[armando-fandango]

@ageron thanks and Yes, I realized it sometime back and switched all of my dev venvs to to 3.6.8 for now.

[seanpmorgan]

@ageron Thank you for reporting this and sorry for the trouble. I'll be working on a macos build and release this week and hopefully we'll have published whls ~within a week.