I downloaded the `mxnet-2.0-20201222.141246-19-linux-x86_64.jar` and find that
```
% ldd org/apache/mxnet/internal/c_api/linux-x86_64/libmxnet.so
/tmp/lin
linux-vdso.so.1 (0x00007fff65fdc000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f46015a3000)
libgfortran.so.3 => not found
librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f4601598000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0
(0x00007f4601575000)
libgomp.so.1 => /lib/x86_64-linux-gnu/libgomp.so.1 (0x00007f4601533000)
libstdc++.so.6 => /lib/x86_64-linux-gnu/libstdc++.so.6
(0x00007f4601352000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f4601201000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1
(0x00007f46011e6000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f4600ff4000)
/lib64/ld-linux-x86-64.so.2 (0x00007f460b892000)
```
As `libgfortran` has changed their ABI a few times over the years, you will
need to include `libgfortran.so` in the `jar` (which we can distribute under
AL2 License thanks to the [GCC Runtime Library
Exception](https://www.gnu.org/licenses/gcc-exception-3.1.en.html)). However,
you must not include `libquadmath.so` (dependency of `libgfortran.so`) as it is
GPL licensed.
For the gpu version `mxnet-2.0-20201222.141246-19-linux-x86_64-gpu.jar`, would
it make sense to use `cu110` instead of `gpu` if built with cuda 11.0 etc?
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