Javacpp: problem with linked library - symbol not found in flat namespace

Question

I'm trying to use javacpp library. I've prepared c-lib with one function

char * hello(const char * name);

and build it with cmake (on mac, with clang++)

Also I've prepared config file for javacpp

package arrival;

import org.bytedeco.javacpp.annotation.*;
import org.bytedeco.javacpp.tools.*;

@Properties(
        value = @Platform(
                includepath = {"/Users/valentina.baranova/external/kotlin-cloud/greeter/include/"},
                include = {"greeter.h"},
                library = "greeter-jni",
                link = {"greeter"},
                linkpath = {"/Users/valentina.baranova/external/kotlin-cloud/greeter/build/"}
        ),
        target = "arrival.greeter"
)
public class GreeterConfig implements InfoMapper {
    public void map(InfoMap infoMap) {
    }
}

javacpp prepared library libgreeter-jni.dylib, but when I try to call hello function I got an error

dlopen(/Users/valentina.baranova/external/kotlin-cloud/greeter-javacpp/target/classes/arrival/macosx-x86_64/libgreeter-jni.dylib, 0x0001): symbol not found in flat namespace '__Z5helloPKc'

What I'm doing wrong? In debug I see that Loader.load() loads both libraries.

UPD: Loader.load() is loaded in autogenerated greeter class.

Function hello there is in both libraries but it has different name

nm libgreeter-jni.dylib | grep hello
0000000000001f70 T _Java_arrival_greeter_hello__Ljava_lang_String_2
0000000000001ce0 T _Java_arrival_greeter_hello__Lorg_bytedeco_javacpp_BytePointer_2
                 U __Z5helloPKc

nm libgreeter.dylib | grep hello
0000000000003f50 T _hello