So I am working mostly with MRI. I do have some jruby experience at this point in time, including jruby-SWING.

I prototype GUIs often in libui these days, simply because it is super-fast. Then I go into other toolkits,
including the web, and add more stuff to make things work on several toolkits.

jruby on windows works, GraalVM also kind of works. jruby-swing on windows works too; I tested this
via a calculator, and the calculator works. \o/

Right now I am rewriting one of my biggest projects - the one where I compile stuff from source. I
use this on linux to compile everything from source. I tested it on windows too, and it somewhat works
there as well; windows has some oddities, though, including the compiler. Since recently I am actually
testing cygwin; while MSYS2 may be better, I like that I have to learn step-by-step things from cygwin.
Helps me more in the long run.

Yesterday I compiled a hello world example and the .exe was built too. I understand that cygwin is a
bit limited in regards to requiring a .dll, but my main point for compiling things is to actually test my
own build scripts. If I can then use them to compile stuff on windows (such as qpdf, which reportedly
CAN be compiled on windows), then I can eventually improve TONS of things, by having
one unified code base at hand - including batch-compiling all software that I have registered so far
(almost 4000 programs are registered therein)..

Anyway, this brings me now to the question ... in a moment.

Right now I have those two choices:

• jruby + swing on windows
• MRI ruby + libui on windws

I already know that both approaches work, but for various reasons, I prefer jruby on windows,
oddly enough (and MRI on linux). So, it would help me a LOT if I could prototype via libui, on
linux, and then have that work on WINDOWS; via jruby. (I could use swing, which is plan b,
but prototyping in libui is so incredibly fast, my thoughts almost become 1:1 the code for it,
even though naturally libui is very limited compared to swing and most other GUIs.)

Can I use jruby with libui on windows? I have not tried that yet. Does anyone else give it a
go and have it work? I think it may work, but I don't know right now - have not tried it.

kojix2 libui bindings are here:

https://github.com/kojix2/LibUI

I could try:

gem install libui --pre

or rather

jgem install libui --pre

I suppose.

I can't yet test this right now (at work, or rather, not at home); will give it a go later this
evening or tomorrow. In the event I run into problems, any pointers to overcome? Or
anyone knows whether this can work? I suppose it also depends on jruby's FFI support
or rather fiddle support. Right now I don't know any of that really.