What is best practice to call `SymbolLookup.libraryLookup()` in cross-platform way?

[Daniel Lemire]

I have a blog post on the topic and it worked for me:

Daniel Lemire, "A new way to call C from Java: how fast is it?," in *Daniel Lemire's blog*, January 17, 2026, https://lemire.me/blog/2026/01/17/a-new-way-to-call-c-from-java-how-fast-is-it/.

Code sample: 

`System*.*loadLibrary*(*"sum"*);*
Linker linker *=* Linker*.*nativeLinker*();*
SymbolLookup lookup *=* SymbolLookup*.*loaderLookup*();*
MemorySegment sumAddress *=* lookup*.*find*(*"sum_array"*).*orElseThrow*();*`


On Fri, Jan 30, 2026, at 07:18, Lev Serebryakov wrote:
> January 29, 2026 at 5:39 PM, "Daniel Lemire" <daniel at lemire.me> wrote:
> 
> 
> > Maybe.,..
> > 
> > System.loadLibrary("mylib");
> > 
> 
> As far as I can tell java.lang.foreign doesn't use `System.loadLibrary()` and one cannot be converted to another.
> 
>   Documentation in JDK says it is `dlopen()` for POSIX-like and `LoadLibrary()` for Windows (which is pity, as they requires very different arguments). But I cannot make it work on MacOS even with `dlopen()` rules.
> 
>   And I don't want to use full paths, as they are very OS-specific...
> 
> 
> -- 
> // Lev Serebryakov
> 
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