Build and stage dynamic op libraries before wheel creation (#51)

Add explicit build and copy steps for dynamic op libraries (.so files) in
build_common.sh. This ensures all six dynamic library targets are built and
copied to struct2tensor/ops/ before the wheel is packaged.

Previously, the stamp_wheel step in build_manylinux.sh would fail with
patchelf errors ("No such file or directory") because the .so files were
expected in struct2tensor/ops/ but were not being copied from bazel-bin.

This fix:
- Explicitly builds each dynamic library target
- Copies the built .so files from bazel-bin to the staging directory
- Runs before bazel run :build_pip_package to ensure files are present

Fixes the missing _decode_proto_map_op.so, _decode_proto_sparse_op.so and
related dynamic library warnings during wheel packaging.

Author: czgdp1807

build_common.sh

@@ -62,6 +62,21 @@ function install_tensorflow() {
   "${PYTHON_BIN_PATH}" -c 'import tensorflow as tf; print(tf.version.VERSION)'
 }
 
+function build_dynamic_libraries() {
+  # Explicitly build the dynamic library targets that are needed for the wheel.
+  # These are required by the stamp_wheel function.
+  bazel build //struct2tensor/ops:_decode_proto_map_op.so || exit 1;
+  bazel build //struct2tensor/ops:_decode_proto_sparse_op.so || exit 1;
+  bazel build //struct2tensor/ops:_run_length_before_op.so || exit 1;
+  bazel build //struct2tensor/ops:_equi_join_any_indices_op.so || exit 1;
+  bazel build //struct2tensor/ops:_equi_join_indices_op.so || exit 1;
+  bazel build //struct2tensor/ops:_parquet_dataset_op.so || exit 1;
+
+  RUNFILES_DIR=$(pwd)
+  cp -f bazel-bin/struct2tensor/ops/*.so ${RUNFILES_DIR}/struct2tensor/ops/
+
+}
+
 set -x
 
 for i in "$@"; do
@@ -116,6 +131,8 @@ if [[ ("${TF_VERSION}" == "NIGHTLY_TF") || ("${TF_VERSION}" == "NIGHTLY_TF_2") ]
 
 fi
 
+build_dynamic_libraries
+
 # :build_pip_package builds and links struct2tensor ops against a TF
 # installation and packages the result dynamic libraries.
 bazel run -c opt \

struct2tensor/tools/docker_build/build_manylinux.sh

@@ -117,4 +117,3 @@ set -x
 setup_environment && \
 bazel_build && \
 stamp_wheel
-