Building Scala 3.x

Building Scala

Below versions of Scala are available in respective distributions at the time of creation of these build instructions:

• Ubuntu (18.04, 20.04) has 2.11.12-4
• Ubuntu (22.04, 22.10) has 2.11.12-5
• RHEL (8.4, 8.6, 8.7) has 2.10.6
• SLES 15 SP3 has 2.10.7

The instructions provided below specify the steps to build Scala version 3.2.1 on Linux on IBM Z Systems for following distributions:

• RHEL (7.8, 7.9, 8.4, 8.6, 8.7, 9.0, 9.1)
• SLES (12 SP5, 15 SP3, 15 SP4)
• Ubuntu (18.04, 20.04, 22.04, 22.10)

General Notes:

• When following the steps below please use a standard permission user unless otherwise specified.
• A directory /<source_root>/ will be referred to in these instructions. This is a temporary writable directory anywhere you'd like to place it.

Step 1: Build and Install Scala

1.1) Install the dependencies

export SOURCE_ROOT=/<source_root>/

• RHEL (7.8, 7.9, 8.4, 8.6, 8.7, 9.0, 9.1)

  • With OpenJDK

    sudo yum install -y java-11-openjdk java-11-openjdk-devel wget

  • With IBM Semeru Runtime (previously known as AdoptOpenJDK openj9)

    sudo yum install -y tar wget

    • Download and install IBM Semeru Runtime (Java 11) from here.

  • With Eclipse Adoptium Temurin Runtime (previously known as AdoptOpenJDK hotspot)

    sudo yum install -y tar wget

    • Download and install Eclipse Adoptium Temurin Runtime (Java 11) from here.

• SLES (12 SP5, 15 SP3, 15 SP4)

  • With OpenJDK

    sudo zypper install -y java-11-openjdk java-11-openjdk-devel wget

  • With IBM Semeru Runtime (previously known as AdoptOpenJDK openj9)

    sudo zypper install -y tar wget gzip

    • Download and install IBM Semeru Runtime (Java 11) from here.

  • With Eclipse Adoptium Temurin Runtime (previously known as AdoptOpenJDK hotspot)

    sudo zypper install -y tar wget gzip

    • Download and install Eclipse Adoptium Temurin Runtime (Java 11) from here.

• Ubuntu (18.04, 20.04, 22.04, 22.10)

  • With OpenJDK

    sudo apt-get update
    sudo apt-get install -y wget openjdk-11-jdk openjdk-11-jdk-headless

  • With IBM Semeru Runtime (previously known as AdoptOpenJDK openj9)

    sudo apt-get update
    sudo apt-get install -y wget tar gzip

    • Download and install IBM Semeru Runtime (Java 11) from here.

  • With Eclipse Adoptium Temurin Runtime (previously known as AdoptOpenJDK hotspot)

    sudo apt-get update
    sudo apt-get install -y wget tar gzip

    • Download and install Eclipse Adoptium Temurin Runtime (Java 11) from here.

Note: At the time of creation of these build instructions, Scala 3.2.1 was verified with OpenJDK 11 (build 11.0.17-LTS) , Eclipse Adoptium Temurin Runtime-11.0.17+8 (build 11.0.17.8) and IBM Semeru Runtime Open Edition 11.0.17+8 (build 11.0.17+8).

1.2) Set Environment Variables

export JAVA_HOME=<Path to Java>
export PATH=$JAVA_HOME/bin:$PATH

1.3) Download and Install Scala

cd $SOURCE_ROOT
wget https://github.com/lampepfl/dotty/releases/download/3.2.1/scala3-3.2.1.tar.gz
tar -xvf scala3-3.2.1.tar.gz
export PATH=$SOURCE_ROOT/scala3-3.2.1/bin:$PATH

Check Scala version by using the following command

scala -version
scalac -version

Scala compiler version 3.2.1 -- Copyright 2002-2022, LAMP/EPFL.

Step 2: [Optional] Testing Scala Sample Program

2.1) Create a test program

Create a test file called Hello.scala using below command:

echo '@main def hello = println("Hello, world!")' > Hello.scala

2.2) Compile the test program

scalac Hello.scala

Note: This will create several files:

Hello$package$.class
Hello$package.class
Hello$package.tasty
Hello.scala
hello.class
hello.tasty

2.3) Execute the test program

scala hello

The output of the above test program should be:

Hello, world!

Note: For addition information on Getting Started with Scala, visit here

References

• http://www.scala-lang.org/
• https://docs.scala-lang.org/scala3/book/taste-hello-world.html