[GR-50345] Get whether it is a static link when building a native image

[Glavo]

I'm fixing some native-image related issues for Jansi.

Jansi uses FFM or JNI by default, but they do not work in statically linked native images. Therefore, I provide a slower but working implementation. The specific implementation to be used is determined at build time.

However, there seems to be no way for me to know at build time whether the native image is statically linked, so users has to add options manually to make it work.

Can you add some system properties to tell whether the program is statically linked and whether the libc used is musl or glibc?

[Glavo]

Jansi uses FFM or JNI by default, but they do not work in statically linked native images. Therefore, I provide a slower but working implementation.

Some more detailed information:

On Linux/macOS, we need to call two native methods: isatty and ioctl.

Symbol.loaderLookup() cannot find these symbols in statically linked native images, so the only way to call them is the Native Image C API. Unfortunately, ioctl is a variadic function, and the Native Image C API does not yet support variadic functions (#7507), so we have to use a slower way around this limitation.

Also we cannot use Native Image C API on Windows due to #1760, this makes me depressed.

[wkgcass]

For statically linked JNI, you may refer to this blog, which might help.

Related issues:

#3359 #4028 #7618

[kassifar]

Hello @Glavo,
Thank you for your suggestion. We'll be taking a look at it.