Verovio SVG generation not working on Linux

[th-we]

Tried both the oXygen installer with bundled JRE (JAVA_VERSION="1.8.0_202") and the platform independent download together with openjdk 11.0.4.

I get the following respective console outputs in oXygen:

Executing:
"/path/to/Oxygen XML Editor 21/jre/bin/java" -Dfile.encoding=UTF-8 -Xmx256m -classpath "/path/to/Oxygen XML Editor 21/tools/ant/lib/ant-launcher.jar" "-Dant.home=/path/to/Oxygen XML Editor 21/tools/ant" org.apache.tools.ant.launch.Launcher -f "/path/to/.com.oxygenxml/extensions/v21.1/frameworks/file__path_to_Downloads_oXygen_MEI_addon.xml/oXygen-MEI-addon/stylesheets/SVG/build.xml" "-Dfile.path=/tmp/test.mei" "-Dverovio.path=/path/to/.com.oxygenxml/extensions/v21.1/frameworks/file__path_to_Downloads_oXygen_MEI_addon.xml/oXygen-MEI-addon/verovio/bindings/java/example-mei/" "-Dwebhelp.trial.license=yes"

Buildfile: /path/to/.com.oxygenxml/extensions/v21.1/frameworks/file__path_to_Downloads_oXygen_MEI_addon.xml/oXygen-MEI-addon/stylesheets/SVG/build.xml
     [echo] /tmp/test.mei

generate:
     [echo] /tmp/test.mei
     [java] Java HotSpot(TM) 64-Bit Server VM warning: You have loaded library /tmp/libverovio4798142149645763620.tmp which might have disabled stack guard. The VM will try to fix the stack guard now.
     [java] It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
     [java] Exception in thread "main" java.lang.UnsatisfiedLinkError: /tmp/libverovio4798142149645763620.tmp: /tmp/libverovio4798142149645763620.tmp: Ungültiger ELF-Header (Possible cause: endianness mismatch)
     [java] 	at java.lang.ClassLoader$NativeLibrary.load(Native Method)
     [java] 	at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1941)
     [java] 	at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1824)
     [java] 	at java.lang.Runtime.load0(Runtime.java:809)
     [java] 	at java.lang.System.load(System.java:1086)
     [java] 	at org.rismch.verovio.NativeUtils.loadLibraryFromJar(NativeUtils.java:91)
     [java] 	at main.main(main.java:13)

     [java] Java Result: 1
main:

BUILD SUCCESSFUL
Total time: 0 seconds

The process finished with exit code: 0

Executing:
"/usr/lib/jvm/java-11-openjdk-amd64/bin/java" -Dfile.encoding=UTF-8 -Xmx256m -classpath "/path/to/oxygen/tools/ant/lib/ant-launcher.jar" "-Dant.home=/path/to/oxygen/tools/ant" org.apache.tools.ant.launch.Launcher -f "/path/to/.com.oxygenxml/extensions/v21.1/frameworks/file__path_to_Downloads_oXygen_MEI_addon.xml/oXygen-MEI-addon/stylesheets/SVG/build.xml" "-Dfile.path=/tmp/test.mei" "-Dverovio.path=/path/to/.com.oxygenxml/extensions/v21.1/frameworks/file__path_to_Downloads_oXygen_MEI_addon.xml/oXygen-MEI-addon/verovio/bindings/java/example-mei/" "-Dwebhelp.trial.license=yes"

Buildfile: /path/to/.com.oxygenxml/extensions/v21.1/frameworks/file__path_to_Downloads_oXygen_MEI_addon.xml/oXygen-MEI-addon/stylesheets/SVG/build.xml
     [echo] /tmp/test.mei

generate:
     [echo] /tmp/test.mei
     [java] OpenJDK 64-Bit Server VM warning: You have loaded library /tmp/libverovio13222648962639583019.tmp which might have disabled stack guard. The VM will try to fix the stack guard now.
     [java] It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
     [java] Exception in thread "main" java.lang.UnsatisfiedLinkError: /tmp/libverovio13222648962639583019.tmp: /tmp/libverovio13222648962639583019.tmp: Ungültiger ELF-Header (Possible cause: endianness mismatch)
     [java] 	at java.base/java.lang.ClassLoader$NativeLibrary.load0(Native Method)
     [java] 	at java.base/java.lang.ClassLoader$NativeLibrary.load(ClassLoader.java:2430)
     [java] 	at java.base/java.lang.ClassLoader$NativeLibrary.loadLibrary(ClassLoader.java:2487)
     [java] 	at java.base/java.lang.ClassLoader.loadLibrary0(ClassLoader.java:2684)
     [java] 	at java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2617)
     [java] 	at java.base/java.lang.Runtime.load0(Runtime.java:767)
     [java] 	at java.base/java.lang.System.load(System.java:1831)
     [java] 	at org.rismch.verovio.NativeUtils.loadLibraryFromJar(NativeUtils.java:91)
     [java] 	at main.main(main.java:13)
     [java] Java Result: 1

main:

BUILD SUCCESSFUL
Total time: 1 second

The process finished with exit code: 0

[craigsapp]

The text:

(Possible cause: endianness mismatch)

Seems to be key to the problem, probably indicating that verovio needs to be compiled on linux, but seems to have been compiled on a Mac.

[th-we]

I guess I'd have to compile a Linux-specific libverovio.jnilib. However, when I try to build the addon, ant fails with the following error:

verovio-prepare:
     [exec] WARNING: An illegal reflective access operation has occurred
     [exec] WARNING: Illegal reflective access by com.google.inject.internal.cglib.core.$ReflectUtils$1 (file:/usr/share/maven/lib/guice.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
     [exec] WARNING: Please consider reporting this to the maintainers of com.google.inject.internal.cglib.core.$ReflectUtils$1
     [exec] WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
     [exec] WARNING: All illegal access operations will be denied in a future release
     [exec] [INFO] Scanning for projects...
     [exec] [INFO] 
     [exec] [INFO] ------------------< org.rism.verovio:VerovioToolkit >-------------------
     [exec] [INFO] Building VerovioToolkit 2.0.0
     [exec] [INFO] --------------------------------[ jar ]---------------------------------
     [exec] [INFO] 
     [exec] [INFO] --- maven-resources-plugin:2.6:resources (default-resources) @ VerovioToolkit ---
     [exec] [INFO] Using 'UTF-8' encoding to copy filtered resources.
     [exec] [INFO] skip non existing resourceDirectory /home/tom/devel/oXygen-MEI-addon/submodules/verovio/bindings/java/src/main/resources
     [exec] [INFO] 
     [exec] [INFO] --- maven-compiler-plugin:3.1:compile (default-compile) @ VerovioToolkit ---
     [exec] [INFO] Changes detected - recompiling the module!
     [exec] [INFO] Compiling 1 source file to /home/tom/devel/oXygen-MEI-addon/submodules/verovio/bindings/java/target/classes
     [exec] [INFO] -------------------------------------------------------------
     [exec] [ERROR] COMPILATION ERROR : 
     [exec] [INFO] -------------------------------------------------------------
     [exec] [ERROR] Source option 5 is no longer supported. Use 6 or later.
     [exec] [ERROR] Target option 1.5 is no longer supported. Use 1.6 or later.
     [exec] [INFO] 2 errors 
     [exec] [INFO] -------------------------------------------------------------
     [exec] [INFO] ------------------------------------------------------------------------
     [exec] [INFO] BUILD FAILURE
     [exec] [INFO] ------------------------------------------------------------------------
     [exec] [INFO] Total time:  1.262 s
     [exec] [INFO] Finished at: 2019-09-17T07:49:36+02:00
     [exec] [INFO] ------------------------------------------------------------------------
     [exec] [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.1:compile (default-compile) on project VerovioToolkit: Compilation failure: Compilation failure: 
     [exec] [ERROR] Source option 5 is no longer supported. Use 6 or later.
     [exec] [ERROR] Target option 1.5 is no longer supported. Use 1.6 or later.
     [exec] [ERROR] -> [Help 1]
     [exec] [ERROR] 
     [exec] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
     [exec] [ERROR] Re-run Maven using the -X switch to enable full debug logging.
     [exec] [ERROR] 
     [exec] [ERROR] For more information about the errors and possible solutions, please read the following articles:
     [exec] [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
     [exec] Result: 1

Where can I specify the source and target options? Without really knowing what I'm doing, I added the following lines to the build.properties file:

java.source=6
java.target=1.6

...which doesn't change anything.