Build gtk.linux.riscv64 native SWT fragment

[Sakura286]

With command

mvn verify -DskipTests=true -Dnative=gtk.linux.riscv64

riscv64 artifact can be generated at binaries/org.eclipse.swt.gtk.linux.riscv64/target/

[github-actions]

Test Results

   486 files  ±0     486 suites  ±0   6m 56s ⏱️ -11s
 4 159 tests ±0   4 151 ✅ ±0   8 💤 ±0  0 ❌ ±0 
16 390 runs  ±0  16 298 ✅ ±0  92 💤 ±0  0 ❌ ±0 

Results for commit 22fc519. ± Comparison against base commit c305b75.

♻️ This comment has been updated with latest results.

[Sakura286]

According to the error log in GitHub CI

Error:  Failed to execute goal org.eclipse.tycho:tycho-packaging-plugin:4.0.8:package-plugin (default-package-plugin) on project org.eclipse.swt.gtk.linux.riscv64: /home/runner/work/eclipse.platform.swt/eclipse.platform.swt/binaries/org.eclipse.swt.gtk.linux.riscv64/build.properties: bin.includes value(s) [*.so] do not match any files. -> [Help 1]

Should the *.so files be uploaded manually first?

[akurtakov]

*.so files should be generated by the jenkins build. I would leave it to @HannesWell to tell us what is the status here. IIRC equinox is currently blocked by https://gitlab.eclipse.org/eclipsefdn/helpdesk/-/issues/4978#note_2820978 and swt has more or less same requirements and should share the same machine.

[yuzibo]

Sorry. Can I know when the PR can be merged? maybe this is still blocked by the ticket.:)

[HannesWell]

For now we need to have the same work-around in the Jenkinsfile of this project like in Equinox to obtain the JDK the natives are built against:
https://github.com/eclipse-equinox/equinox/blob/ef8e0438b0704a5fb8c6cd323081f63c7f04a3ba/Jenkinsfile#L50-L62

After adding this, please also squash all your commits into one with a message covering this change as a whole, e.g.:
Build gtk.linux.riscv64 native SWT fragment

[Sakura286]

Now the patch is ready for review.

[HannesWell]

I just added the changes from #1490 so that we have a clean version.

Looks good now.

Thank you.

[HannesWell]

The initial build cannot succeed in the GH workflows because the native binaries are not yet present.

Submitting for the initial build.