The Gradle build file allows JavaFX to be built only on the following operating systems and hardware architectures:

  Windows
    x86
    amd64

  macOS
    x86_64
    aarch64

  Linux
    i386
    amd64
    aarch64
    loongarch64

It does so by checking the values of the Java 'os.name' and 'os.arch' system properties. Yet JavaFX can be built successfully for Linux on other architectures, including 'arm', 'ppc64le', and 's390x'.

SYSTEM / OS / JAVA RUNTIME INFORMATION

The following build tools were used:

  jdk.runtime.version: 17.0.6+10-Ubuntu-0ubuntu118.04.1
  GCC version: gcc11.2.0-OL6.4+1.0
  cmake version: 3.22.3
  ninja version: 1.8.2
  ant version: 1.10.5

STEPS TO REPRODUCE

Build JavaFX for Linux on the following six architectures, listed below by their Java 'os.arch' system property names followed by their Debian architecture names in parenthesis:

  aarch64 (arm64)
  amd64 (amd64)
  arm (armhf)
  i386 (i386)
  ppc64le (ppc64el)
  s390x (s390x)

Run the builds with a command like the following:

  $ bash gradlew --no-daemon sdk jmods javadoc

EXPECTED RESULTS

All of the builds are successful:

  BUILD SUCCESSFUL in 2m 41s
  137 actionable tasks: 137 executed

ACTUAL RESULT

Only two of the builds are successful:

  aarch64 (arm64)
  amd64 (amd64)

The other four builds fail.

The build on 'i386' fails to verify its dependencies:

  FAILURE: Build failed with an exception.

  * What went wrong:
  Execution failed for task ':swt:compileJava'.
  > Dependency verification failed for configuration ':swt:compileClasspath'
    One artifact failed verification:
      org.eclipse.swt.gtk.linux.x86_3.105.3.v20170228-0512-.jar
      (:org.eclipse.swt.gtk.linux.x86_3.105.3.v20170228-0512:)
      from repository ivy

The builds on 'arm', 'ppc64le', and 's390x' fail to pass the architecture check:

  FAILURE: Build failed with an exception.

  * Where:
  Build file '/build/.../jfx/build/build.gradle' line: 250

  * What went wrong:
  A problem occurred evaluating root project 'build'.
  > FAIL: Unknown and unsupported build architecture: arm

  * What went wrong:
  A problem occurred evaluating root project 'build'.
  > FAIL: Unknown and unsupported build architecture: ppc64le

  * What went wrong:
  A problem occurred evaluating root project 'build'.
  > FAIL: Unknown and unsupported build architecture: s390x

  ...

  BUILD FAILED in 1m 5s
  2 actionable tasks: 2 executed

SOURCE CODE FOR AN EXECUTABLE TEST CASE

None.

WORKAROUND

None.