System.loadLibrary in java has counter-intuitive behaviour. It examines the stack to figure out what class invoked it, then loads the native library into the Classloader of that class. At the REPL, this classloader is usually a transient instance of DynamicClassLoader, which isn't very helpful in terms of actually having access to the library once it's been loaded.
This is why the function clojure.lang.RT/loadLibrary exists. Since RT is loaded by clojure's parent classloader, any libraries loaded using that method end up in the correct place. TLDR: use (clojure.lang.RT/loadLibrary ...) instead of (java.lang.System/loadLibrary ...) --Aaron On Tue, May 13, 2014 at 3:00 PM, Gary Verhaegen <gary.verhae...@gmail.com>wrote: > Hi everyone, > > I have recently been working on something [0] that required (consisted > mainly of, really) loading native dlls. I have encountered a > surprising (to me) behaviour: calling (System/load path) from Clojure > correctly loaded the library, but did not link the JNI methods, > whereas just switching to Java did link everything correctly. > > I spent more time on this than I care to admit, but in the end what > worked was creating a Java class with a single static method that > called System.load [1] and calling that from Clojure [2]. > > So my question is: is that somehow expected behaviour, or should I > file a bug report (after I investigate a bit more so I can provide > more details)? > > > [0] https://github.com/gaverhae/naughtmq > [1] > https://github.com/gaverhae/naughtmq/blob/master/src/naughtmq/PrivateLoader.java > [2] > https://github.com/gaverhae/naughtmq/blob/master/src/naughtmq/core.clj#L89 > > -- > You received this message because you are subscribed to the Google > Groups "Clojure" group. > To post to this group, send email to clojure@googlegroups.com > Note that posts from new members are moderated - please be patient with > your first post. > To unsubscribe from this group, send email to > clojure+unsubscr...@googlegroups.com > For more options, visit this group at > http://groups.google.com/group/clojure?hl=en > --- > You received this message because you are subscribed to the Google Groups > "Clojure" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to clojure+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Clojure" group. To post to this group, send email to clojure@googlegroups.com Note that posts from new members are moderated - please be patient with your first post. To unsubscribe from this group, send email to clojure+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/clojure?hl=en --- You received this message because you are subscribed to the Google Groups "Clojure" group. To unsubscribe from this group and stop receiving emails from it, send an email to clojure+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
