Linking to macOS frameworks

Maurizio Cimadamore maurizio.cimadamore at
Wed May 19 17:02:59 UTC 2021

Hi Clayton,
Is UserNotification a library? E.g. is there a file 
UserNotification.dylib in that folder?

If so, just use "Library.ofPath" and include the suffix - as that method 
wants the library absolute path.


On 19/05/2021 17:46, Clayton Walker wrote:
> Hello,
> I'm working on a project that would let you call objective-c functions from
> java, without first needing to wrap the api in a shared library. While this
> works for symbols that are already available
> (i.e.LibraryLookup.ofDefault().lookup("objc_getClass")), it doesn't work
> for symbols that are in another framework.
> For example, I would like to be able to write something like this:
> LibraryLookup.ofLibrary("/System/Library/Frameworks/UserNotifications.framework/Versions/Current/UserNotifications");
> // or
> LibraryLookup.ofPath(Path.of("/System/Library/Frameworks/UserNotifications.framework/Versions/Current/UserNotifications"));
> however this currently doesn't work. The first call throws with "Directory
> separator should not appear in library name", second one throws with
> "Library not found".
> I've been able to work around this by using dlopen
> MemoryAddress l1;
> try (var c =
> CLinker.toCString("/System/Library/Frameworks/UserNotifications.framework/Versions/Current/UserNotifications"))
> {
>      l1 = (MemoryAddress) dlopen.invokeExact(c.address(), 1);
> }
> but this seems rather strange. It looks like LibraryLookup.ofPath requires
> the path to exist, whereas in Big Sur the files no longer exist (via

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