Add Dockerfile and page for ARM builds. (#83)

BUILD.md

@@ -6,7 +6,7 @@
 |-------------|:------------:|:------------:|------------------------------------|
 |Windows 10   | YES          | YES         |Must use VS 2017 or the latest VS2015|
 |Windows 10 <br/> Subsystem for Linux | YES         | NO        |         |
-|Ubuntu 16.x  | YES          | YES         |                            |
+|Ubuntu 16.x  | YES          | YES         | Also supported on ARM32v7 (experimental) |
 |Ubuntu 17.x  | YES          | YES         |                            |
 |Ubuntu 18.x  | YES          | YES         |                            |
 |Fedora 24    | YES          | YES         |                            |
@@ -141,3 +141,8 @@ Then run it
 ```
 ./tools/ci_build/github/linux/run_dockerbuild.sh
 ```
+
+## ARM Builds
+We've experimental support for ARM builds. Please see [ARM docker file](dockerfiles/Dockerfile.arm32v7). Note that
+to build in ACR-Build (Azure Container Registry), you may want to split it to two files and run them one by one.
+If you run this Dockerfile directly in ACR-Build, it is likely to hit their timeout limitation (8 hours).

README.md

@@ -47,7 +47,7 @@ Looking ahead: To broaden the reach of the runtime, we will continue investments
 * C# for Linux, Mac
 * C# supporting GPU
 * C packages
-* ARM
+* [ARM](BUILD.md##arm-builds)
 
 # Getting Started 
 If you need a model:  

dockerfiles/Dockerfile.arm32v7

@@ -0,0 +1,34 @@
+FROM arm32v7/ubuntu:16.04
+
+RUN apt-get update && apt-get install -y sudo build-essential curl libcurl4-openssl-dev libssl-dev wget python3 python3-pip python3-dev git
+RUN pip3 install numpy
+
+# Build the latest cmake
+WORKDIR /code
+RUN wget https://cmake.org/files/v3.12/cmake-3.12.3.tar.gz;
+RUN tar zxf cmake-3.12.3.tar.gz
+
+WORKDIR /code/cmake-3.12.3
+RUN ./configure --system-curl
+RUN make
+RUN sudo make install
+
+# Prepare onnxruntime Repo
+# WORKDIR /code/onnxruntime
+# RUN git clone --recursive https://github.com/Microsoft/onnxruntime
+
+WORKDIR /code/onnxruntime
+ARG BUILDTYPE=Debug
+
+# Start the basic build
+RUN ./build.sh --config ${BUILDTYPE}
+
+# Build Shared Library
+RUN ./build.sh --config ${BUILDTYPE} --build_shared_lib
+
+# Build Python Binding
+RUN ./build.sh --config ${BUILDTYPE} --enable_pybind
+
+# Build Output
+RUN ls -l /code/onnxruntime/build/Linux/Debug/*.so
+RUN ls -l /code/onnxruntime/build/Linux/Debug/dist/*.whl