FIX: build using tf sysconfig (#197)

* Build using sysconfig for linux and macos

Author: seanpmorgan

README.md

@@ -62,8 +62,8 @@ To install the latest version, run the following:
 ```
 pip install tensorflow-addons
 ```
-
-**Note:** You will also need [TensorFlow 2.0 or higher](https://www.tensorflow.org/alpha). 
+ 
+**Note:** You will also need [`tensorflow==2.0.0.a0`](https://www.tensorflow.org/alpha) installed.
 
 To use addons:
 
@@ -76,6 +76,8 @@ import tensorflow_addons as tfa
 You can also install from source. This requires the [Bazel](
 https://bazel.build/) build system.
 
+**Note:** If building from master you must install `tf-nightly-2.0-preview` in the process.
+
 ```
 git clone https://github.com/tensorflow/addons.git
 cd addons

configure.sh

@@ -44,6 +44,8 @@ pip install $QUIET_FLAG -r requirements.txt
 
 TF_CFLAGS=( $(python -c 'import tensorflow as tf; print(" ".join(tf.sysconfig.get_compile_flags()))') )
 TF_LFLAGS=( $(python -c 'import tensorflow as tf; print(" ".join(tf.sysconfig.get_link_flags()))') )
+TF_SHAREDLIB=( $(python -c 'import tensorflow as tf; print(tf.sysconfig.get_link_flags()[-1])') )
 
 write_action_env_to_bazelrc "TF_HEADER_DIR" ${TF_CFLAGS:2}
 write_action_env_to_bazelrc "TF_SHARED_LIBRARY_DIR" ${TF_LFLAGS:2}
+write_action_env_to_bazelrc "TF_SHARED_LIBRARY_NAME" ${TF_SHAREDLIB:3}

tf_dependency/BUILD.tpl

@@ -7,14 +7,10 @@ cc_library(
     visibility = ["//visibility:public"],
 )
 
-# FIXME: Read shared library name from the installed python package.
-# See https://github.com/tensorflow/tensorflow/issues/27430 for why we're
-# linking with hardcoded framework.so.2
 
 cc_library(
     name = "libtensorflow_framework",
-    srcs = [":libtensorflow_framework.so.2"],
-    #data = ["lib/libtensorflow_framework.so.2"],
+    srcs = ["%{TF_SHARED_LIBRARY_NAME}"],
     visibility = ["//visibility:public"],
 )
 

tf_dependency/tf_configure.bzl

@@ -4,6 +4,8 @@ _TF_HEADER_DIR = "TF_HEADER_DIR"
 
 _TF_SHARED_LIBRARY_DIR = "TF_SHARED_LIBRARY_DIR"
 
+_TF_SHARED_LIBRARY_NAME = "TF_SHARED_LIBRARY_NAME"
+
 def _tpl(repository_ctx, tpl, substitutions = {}, out = None):
     if not out:
         out = tpl
@@ -183,19 +185,22 @@ def _tf_pip_impl(repository_ctx):
     )
 
     tf_shared_library_dir = repository_ctx.os.environ[_TF_SHARED_LIBRARY_DIR]
-    tf_shared_library_path = "%s/libtensorflow_framework.so.2" % tf_shared_library_dir
+    tf_shared_library_name = repository_ctx.os.environ[_TF_SHARED_LIBRARY_NAME]
+    tf_shared_library_path = "%s/%s" % (tf_shared_library_dir, tf_shared_library_name)
+
     tf_shared_library_rule = _symlink_genrule_for_dir(
         repository_ctx,
         None,
         "",
-        "libtensorflow_framework.so.2",
+        tf_shared_library_name,
         [tf_shared_library_path],
-        ["libtensorflow_framework.so.2"],
+        [tf_shared_library_name],
     )
 
     _tpl(repository_ctx, "BUILD", {
         "%{TF_HEADER_GENRULE}": tf_header_rule,
         "%{TF_SHARED_LIBRARY_GENRULE}": tf_shared_library_rule,
+        "%{TF_SHARED_LIBRARY_NAME}": tf_shared_library_name,
     })
 
 tf_configure = repository_rule(