While testing the latest version of plplot I noticed that the dependencies
for the java library plplot.jar are not right. I've partially fixed it,
but I'd like some cmake advice on the complete fix.
It's somewhat complicated because of bugs in some versions of jar we have
to make the whole library in one go, even though it contains files compiled
in bindings/java and examples/java.
In bindings/java/CMakeLists.txt we have a custom target plplot_core
which depends on the relevant .class files and a custom command to build
each .class file from the equivalent .java file.
In examples/java/CMakeLists.txt we have an equivalent custom target
plplot_examples. These work fine and the .class files are updated if the
.java files change.
Also in example/java/CMakeLists.txt are a custom command to create
plplot.jar and a custom target (plplot.jar) which depends on
${CMAKE_CURRENT_BINARY_DIR}/plplot.jar and also has dependencies on the
targets plplot_core and plplot_examples.
Calling this appears to correctly call the targets plplot_core and
plplot_examples, which in turn update the classes. The .jar file is not
updated though. I think what is missing is a dependency of
${CMAKE_CURRENT_BINARY_DIR}/plplot.jar on all the .class files.
I have added in this dependency for the plplot/examples/*.class files,
since I have a list of them in example/java/CMakeLists.txt. Can anyone
see a neat way of doing this for the plplot/core/*.class files without
duplicating the list in bindings/java/CMakeLists.txt. I thought about
having some stamp which is touched when the .class files are rebuilt. I'm
not sure how portable that is.
Any thoughts?
Andrew
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