RFR: 8009550: PlatformPCSC should load versioned so

[Andrew John Hughes]

On Fri, 25 Aug 2023 05:39:39 GMT, Thomas Stuefe <stuefe at openjdk.org> wrote:

> Hi @gnu-andrew,
> 
> in your last example, why does it look for both arm and x64 packages? And why for kFreeBsd? I see you have both hardcoded, why?
> 
> I would expect it only to attempt and pick up the architecture and OS the VM was built for.

Good question.

Because they don't fit the template `$ARCH-linux-gnu/libpcsclite.so` which would expand to `arm-linux-gnu/libpcsclite.so`.

I don't know of a way off-hand to get the ABI or the kernel in use (`kfreebsd` is not a BSD variant, but the usual GNU userland paired with the FreeBSD kernel rather than Linux). The [Wikipedia page](https://en.wikipedia.org/wiki/Debian#Derivatives_and_flavors) actually says it's now discontinued, so maybe we can just drop that one. It probably shows how long ago I [originally wrote and tested these paths](https://icedtea.wildebeest.org/hg/release/icedtea7-forest-2.6/jdk/rev/ae5765c7b8e2)... :)

In short, that was my lazy option for catching those cases that won't fit the common one. I'm open to suggestions. We could skip any template with `'arm'` in, I guess, if the architecture doesn't match. It is worth noting though, that this file is already common to all the UNIX platforms and doesn't do any OS checks, despite the last check being a MacOS framework. That also presumably means MacOS doesn't have any of the `/usr` libraries in turn
.
> 
> Cheers, Thomas

-------------

PR Comment: https://git.openjdk.org/jdk/pull/15409#issuecomment-1698341466