Julia/JNI Bug

Bug.java

package org.foo.bug.jni;

public class Bug {

    static {
        System.loadLibrary("Bug");
    }

    public native static void unreachable();
    
}

Demo.java

package org.foo.bug.jni;

import org.foo.bug.jni.Bug;

public class Demo {

    public static void main(String[] args) {
        Bug.unreachable();
    }

}

makefile

# julia config
JL_SHARE = $(shell julia -e 'print(joinpath(Sys.BINDIR, Base.DATAROOTDIR, "julia"))')
CFlAGS += $(shell $(JL_SHARE)/julia-config.jl --cflags)
CXXFLAGS += $(shell $(JL_SHARE)/julia-config.jl --cflags)
LDFLAGS += $(shell $(JL_SHARE)/julia-config.jl --ldflags)
LDLIBS += $(shell $(JL_SHARE)/julia-config.jl --ldlibs)

# JNI config
CXXFLAGS += -I$(JAVA_HOME)/include -I$(JAVA_HOME)/include/linux

all: libBug.so bug.jar

bug.jar: org/foo/bug/jni/Bug.java
	javac org/foo/bug/jni/Bug.java
	jar cf bug.jar org/foo/bug/jni/Bug.class

libBug.so : org_foo_bug_jni_Bug.o
	gcc $(CFLAGS) $(CXXFLAGS) -shared -o libBug.so org_foo_bug_jni_Bug.o $(LDFLAGS) $(LDLIBS)

org_foo_bug_jni_Bug.o : org_foo_bug_jni_Bug.c org_foo_bug_jni_Bug.h
	gcc -fPIC $(CFLAGS) $(CXXFLAGS) -c org_foo_bug_jni_Bug.c

clean :
	rm -f *.so *.o *.jar org/foo/bug/jni/Bug.class

install :
	mkdir -p ../deps/usr/include
	mkdir -p ../deps/usr/lib
	mkdir -p ../deps/usr/share/java
	cp org_foo_bug_jni_Bug.h ../deps/usr/include
	cp libBug.so ../deps/usr/lib
	cp bug.jar ../deps/usr/share/java

org_foo_bug_jni_Bug.c

#include "org_foo_bug_jni_Bug.h"
#include "julia.h"

JNIEXPORT void JNICALL
Java_org_foo_bug_jni_Bug_unreachable(
        JNIEnv *env,
        jclass  class)
{
    printf("line %d in %s\n", __LINE__, __FILE__);
    jl_init();
    printf("line %d in %s\n", __LINE__, __FILE__);
    jl_eval_string("using Pkg");
    printf("line %d in %s\n", __LINE__, __FILE__);
    jl_atexit_hook(0);
    printf("line %d in %s\n", __LINE__, __FILE__);
}

org_foo_bug_jni_Bug.h

/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class org_foo_bug_jni_Bug */

#ifndef _Included_org_foo_bug_jni_Bug
#define _Included_org_foo_bug_jni_Bug
#ifdef __cplusplus
extern "C" {
#endif
/*
 * Class:     org_foo_bug_jni_Bug
 * Method:    unreachable
 * Signature: ()V
 */
JNIEXPORT void JNICALL Java_org_foo_bug_jni_Bug_unreachable
  (JNIEnv *, jclass);

#ifdef __cplusplus
}
#endif
#endif