Until the nar-maven-plugin upstream has architecture-os-linker entries
for ppc64le.Linux.gpp, the pljava-so project directory
contains an extra settings file aol.ppc64le-linux-gpp.properties. To use it,
add -Dnar.aolProperties=pljava-so/aol.ppc64le-linux-gpp.properties
to the mvn command line:
mvn -Dnar.aolProperties=pljava-so/aol.ppc64le-linux-gpp.properties clean install