trials-graal-cli

Intro

This repository shows how to build a native binary command line application from Kotlin sources, using GraalVM native-image.

The native binary is statically linked (no dynamic dependencies needed).

Build

1. Make sure you have OpenJDK 11 in the PATH (for Gradle to use).

2. Make sure you have the native build tools installed (more information on the Native Image page, the "Prerequisite" section:

   • for Linux and Mac, glibc-devel, zlib-devel, and gcc are required. In addition, for Linux, libstdc++ is also required.

     • on Ubuntu, sudo apt install -y build-essential should be enough (not tested)

     • on Mac, xcode-select --install should be enough

   • for Windows, you need the Visual Studio 2017 Visual C++ Build Tools

3. open a terminal and run:

./gradlew nativeImage

Test the binary

You can find the result at ./build/graal/trials-graal-cli.

$ time ./build/graal/trials-graal-cli --help
Usage: trials-graal-cli [-hV]
Says hello
  -h, --help      Show this help message and exit.
  -V, --version   Print version information and exit.
./build/graal/trials-graal-cli --help  0,00s user 0,01s system 94% cpu 0,006 total

Note that the binary took a total of 6 milliseconds to execute. No more waiting for the JVM to startup! 👍