plantuml-lgpl-1.2019.0.tar.gz does not compile:
[javac] /builddir/build/BUILD/plantuml/src/net/sourceforge/plantuml/stats/StatsUtilsIncrement.java:123: error: cannot find symbol
[javac] if (type == PSystemSudoku.class) {
[javac] ^
[javac] symbol: class PSystemSudoku
[javac] location: class StatsUtilsIncrement
[javac] /builddir/build/BUILD/plantuml/src/net/sourceforge/plantuml/stats/StatsUtilsIncrement.java:132: error: cannot find symbol
[javac] if (type == PSystemDitaa.class) {
[javac] ^
[javac] symbol: class PSystemDitaa
[javac] location: class StatsUtilsIncrement
[javac] /builddir/build/BUILD/plantuml/src/net/sourceforge/plantuml/stats/StatsUtilsIncrement.java:135: error: cannot find symbol
[javac] if (type == PSystemJcckit.class) {
[javac] ^
[javac] symbol: class PSystemJcckit
[javac] location: class StatsUtilsIncrement
Indeed, PSystemJcckit, PSystemDitaa and PSystemSudoku are missing in the lgpl sources.