Fantom: Getting FWT to run on Linux 64-bit

Today I decided to start playing around with the Fantom language. After working through a couple of examples on the Hello World page, I ran into a problem running the example that uses the Fantom Widget Toolkit on my 64-bit machine.

After following the instructions from the Fantom Setup Page, I set my FAN_HOME in my .bash_profile to:

  FAN_HOME=/opt/fantom-1.0.58

I later tried running the Hello FWT example below:

  using fwt
  class FwtHello : Test {
    Void main() {
      Window { Label { text = "Hello world" }, }.open
    }
  }

Which produced the following error:

  hello $ fan hello::FwtHello
  sys::Err: java.lang.UnsatisfiedLinkError: Cannot load 32-bit SWT libraries on 64-bit JVM

I found a swt.jar here:

  /opt/fantom-1.0.58/lib/java/ext/linux-x86/swt.jar

The setup page recommended running fan to get a read on the platform:

 $ fan -version | grep platform
   fan.platform:    linux-x86_64

I created a directory, linux-x86_64, under java/ext, and copied the swt.jar downloaded from the Eclipse site to it.

Afterwhich, the example ran fine.