onnxruntime-extensions/docs/custom_build.md

Build ONNX Runtime with onnxruntime-extensions for Java package

The following step are demonstrated for Windows Platform only, the others like Linux and MacOS can be done similarly.

Android build was supported as well; check here for arguments to build AAR package.

Tools required

1. install visual studio 2022 (with cmake, git, desktop C++)
2. install miniconda to have Python support (for onnxruntime build)
3. OpenJDK: https://docs.microsoft.com/en-us/java/openjdk/download (OpenJDK 11.0.15 LTS)
4. Gradle: https://gradle.org/releases/ (v6.9.2)

Commands

Launch Developer PowerShell for VS 2022 in Windows Tereminal

	. $home\miniconda3\shell\condabin\conda-hook.ps1
	conda activate base

	$env:JAVA_HOME="C:\Program Files\Microsoft\jdk-11.0.15.10-hotspot"
	# clone ONNXRuntime
	git clone -b rel-1.12.0 https://github.com/microsoft/onnxruntime.git onnxruntime

	# clone onnxruntime-extensions
	git clone https://github.com/microsoft/onnxruntime-extensions.git onnxruntime_extensions

	# build JAR package in this folder
	mkdir ortall.build
	cd ortall.build
	python ..\onnxruntime\tools\ci_build\build.py --config Release --cmake_generator "Visual Studio 17 2022" --build_java --build_dir .  --use_extensions --extensions_overridden_path "..\onnxruntime-extensions"