JOCL compiles now, without any changes besides the ones I posted, but I didn't try running it yet, since I'm not using it myself at the moment. Have you tried duplicating your initial tests with a newly-built JOCL to see if it still fails? I'm hoping that the
Mac natives just got out of date due to some library/compiler change in the OS.
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Re: GL_ARB_vertex_buffer_object not available on Mac?
Good question -- I've never tried it, but Sven or Xerxes would know. My impression is that developing for Arm is usually via cross-compilation, but I've never cross-compiled an OpenGL program.
On the other hand, if Raspberry Pi is self-hosting (i.e. if you can compile on it), you could always just try building on it and see if it works. Since the makefile works for Ubuntu now, it should be pretty close for Raspbian, though a few bits might need to be changed to reflect the new directory structure of the Java 11 installation.