Errors when loading SWT library with aggregator build on Arch Linux

[trancexpress]

I build with:

git clean -fdx
git submodule foreach "git clean -fdx"
rm -rf /tmp/.m2/
mvn -e clean install -pl :eclipse-sdk-prereqs,:org.eclipse.jdt.core.compiler.batch -Dmaven.repo.local=/tmp/.m2/repository -DlocalEcjVersion=99.99
mvn -e clean verify -Pbree-libs -DaggregatorBuild=true -DskipTests=true -Dmaven.repo.local=/tmp/.m2/repository -Dcbi-ecj-version=99.99

I launch with:

/data/tmp/jep4266/eclipse.platform.releng.aggregator/eclipse.platform.releng.tychoeclipsebuilder/eclipse.platform.repository/target/products/org.eclipse.sdk.ide/linux/gtk/x86_64/eclipse/eclipse -vm /usr/lib/jvm/java-21-openjdk/bin/java -data /data/tmp/jep4266/testws6

When I launch the SDK, I see this on command line:

OpenJDK 64-Bit Server VM warning: You have loaded library /data/tmp/jep4266/eclipse.platform.releng.aggregator/eclipse.platform.releng.tychoeclipsebuilder/eclipse.platform.repository/target/products/org.eclipse.sdk.ide/linux/gtk/x86_64/eclipse/configuration/org.eclipse.osgi/273/0/.cp/libswt-gtk-4971r8.so which might have disabled stack guard. The VM will try to fix the stack guard now.
It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.

In the log I see this:

!SESSION 2025-10-23 20:52:30.716 -----------------------------------------------
eclipse.buildId=4.38.0.I20251023-1719
java.version=21.0.9
java.vendor=Arch Linux
BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US
Command-line arguments:  -os linux -ws gtk -arch x86_64 -data /data/tmp/jep4266/testws6

!ENTRY org.eclipse.osgi 4 0 2025-10-23 20:52:33.811
!MESSAGE Application error
!STACK 1
java.lang.UnsatisfiedLinkError: Could not load SWT library. Reasons: 
        /data/tmp/jep4266/eclipse.platform.releng.aggregator/eclipse.platform.releng.tychoeclipsebuilder/eclipse.platform.repository/target/products/org.eclipse.sdk.ide/linux/gtk/x86_64/eclipse/configuration/org.eclipse.osgi/273/0/.cp/libswt-gtk-4971r8.so: /data/tmp/jep4266/eclipse.platform.releng.aggregator/eclipse.platform.releng.tychoeclipsebuilder/eclipse.platform.repository/target/products/org.eclipse.sdk.ide/linux/gtk/x86_64/eclipse/configuration/org.eclipse.osgi/273/0/.cp/libswt-gtk-4971r8.so: invalid ELF header
        no swt-gtk in java.library.path: /usr/java/packages/lib:/usr/lib64:/lib64:/lib:/usr/lib
        no swt in java.library.path: /usr/java/packages/lib:/usr/lib64:/lib64:/lib:/usr/lib
        /home/sandreev/.swt/lib/linux/x86_64/libswt-gtk-4971r8.so: /home/sandreev/.swt/lib/linux/x86_64/libswt-gtk-4971r8.so: invalid ELF header
        Can't load library: /home/sandreev/.swt/lib/linux/x86_64/libswt-gtk.so
        Can't load library: /home/sandreev/.swt/lib/linux/x86_64/libswt.so
        /home/sandreev/.swt/lib/linux/x86_64/libswt-gtk-4971r8.so: /home/sandreev/.swt/lib/linux/x86_64/libswt-gtk-4971r8.so: invalid ELF header

        at org.eclipse.swt.internal.Library.loadLibrary(Library.java:345)
        at org.eclipse.swt.internal.Library.loadLibrary(Library.java:254)
        at org.eclipse.swt.internal.C.<clinit>(C.java:20)
        at org.eclipse.swt.internal.gtk.GdkRGBA.<clinit>(GdkRGBA.java:23)
        at org.eclipse.swt.graphics.Color.init(Color.java:524)
        at org.eclipse.swt.graphics.Color.<init>(Color.java:143)
        at org.eclipse.swt.graphics.Device.<clinit>(Device.java:97)
        at org.eclipse.ui.internal.Workbench.createDisplay(Workbench.java:771)
        at org.eclipse.ui.PlatformUI.createDisplay(PlatformUI.java:185)
        at org.eclipse.ui.internal.ide.application.IDEApplication.createDisplay(IDEApplication.java:216)
        at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:158)
        at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:219)
        at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:149)
        at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:115)
        at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:467)
        at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:298)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
        at java.base/java.lang.reflect.Method.invoke(Method.java:580)
        at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:615)
        at org.eclipse.equinox.launcher.Main.basicRun(Main.java:563)
        at org.eclipse.equinox.launcher.Main.run(Main.java:1415)
        at org.eclipse.equinox.launcher.Main.main(Main.java:1387)

Removing ~/.swt or starting in a new workspace doesn't help.

I don't know if I'm using execstack right, but this doesn't seem to do anything:

➜  ~ /usr/lib/paxtest/execstack -c /data/tmp/jep4266/eclipse.platform.releng.aggregator/eclipse.platform.releng.tychoeclipsebuilder/eclipse.platform.repository/target/products/org.eclipse.sdk.ide/linux/gtk/x86_64/eclipse/configuration/org.eclipse.osgi/273/0/.cp/libswt-gtk-4971r8.so
Executable stack                         : Killed

Any idea what is missing here? I was using the SDK built from the aggregator repository on my system, but now it no longer works.