https://github.com/stwind/gradle-jni

Sample project setup for working with Java Native Interface with Gradle
https://github.com/stwind/gradle-jni

gradle java jni

Last synced: about 2 months ago
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Sample project setup for working with Java Native Interface with Gradle

• Host: GitHub
• URL: https://github.com/stwind/gradle-jni
• Owner: stwind
• Created: 2020-05-13T10:33:21.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2020-05-15T13:19:21.000Z (over 4 years ago)
• Last Synced: 2024-04-17T02:00:15.826Z (10 months ago)
• Topics: gradle, java, jni
• Language: Java
• Size: 72.3 KB
• Stars: 19
• Watchers: 3
• Forks: 4
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# JNI Project With Gradle 

A sample project setup/workflow for building JNI libraries (C++) with Gradle for references.

Features

* [Automatic JNI header generation](jni-lib/build.gradle#L24)

* [Load shared libraries embeded in Jar](jni-lib/src/main/java/jni/Tools.java#L5)

* [Unittest JNI with JUnit 5](jni-lib/build.gradle#L48)

Tested on

* Mac OS X

* Ubuntu (focal)

## Prerequisite

* OpenJDK 11+

* CMake 3.13+

## Building

Clone the repo

```sh

$ git clone https://github.com/stwind/gradle-jni.git

$ cd gradle-jni

$ ./gradlew run

```

The output should be something like

```

Downloading https://services.gradle.org/distributions/gradle-6.4-bin.zip

.........10%..........20%..........30%..........40%.........50%..........60%..........70%..........80%.........90%..........100%

Welcome to Gradle 6.4!

Here are the highlights of this release:

 - Support for building, testing and running Java Modules

 - Precompiled script plugins for Groovy DSL

 - Single dependency lock file per project

For more details see https://docs.gradle.org/6.4/release-notes.html

Starting a Gradle Daemon (subsequent builds will be faster)

> Task :jni-lib:compileJNI

-- The CXX compiler identification is GNU 9.3.0

-- Check for working CXX compiler: /usr/bin/c++

-- Check for working CXX compiler: /usr/bin/c++ -- works

-- Detecting CXX compiler ABI info

-- Detecting CXX compiler ABI info - done

-- Detecting CXX compile features

-- Detecting CXX compile features - done

-- Found Java: /usr/lib/jvm/java-13-openjdk-amd64/bin/java (found version "13.0.3")

-- Found JNI: NotNeeded

-- Configuring done

-- Generating done

-- Build files have been written to: /root/gradle-jni/jni-lib/build/natives

Scanning dependencies of target tools

[ 50%] Building CXX object src/main/cpp/CMakeFiles/tools.dir/tools.cpp.o

[100%] Linking CXX shared library ../../../lib/libtools.so

[100%] Built target tools

> Task :jni-runner:run

foobar

BUILD SUCCESSFUL in 26s

6 actionable tasks: 6 executed

```