c++ - nm utility to get what is defined in .so file returns error -

i need symbols defined in .so file. use latest mac os , this:

 /usr/bin/nm  -gc libs/armeabi/libhello.so  

error: /applications/xcode.app/contents/developer/toolchains/xcodedefault.xctoolchain/usr/bin/nm: invalid argument -c usage: /applications/xcode.app/contents/developer/toolchains/xcodedefault.xctoolchain/usr/bin/nm [-agnopruumxjlfap[s segname sectname] [-] [-t format] [[-arch ] ...] [file ...]

as understand nm utility? connected xcode? how fix issue?

edit: adding code .so file created.

#include <android/log.h> #include <stdio.h> #include <jni.h>         jint nativeaddition(jnienv *penv, jobject pobj, jint pa, jint pb)        {          return pa+pb;        }         jint nativemultiplication(jnienv *penv, jobject pobj, jint pa,        jint pb) {          return pa*pb;        }         jniexport jint jnicall jni_onload(javavm* pvm, void* reserved)        {            jnienv* env;            if ((*pvm)->getenv(pvm, (void **)&env, jni_version_1_6)) { return -1; }            jninativemethod nm[2];            nm[0].name = "nativeaddition";            nm[0].signature = "(ii)i";            nm[0].fnptr = nativeaddition;            nm[1].name = "nativemultiplication";            nm[1].signature = "(ii)i";            nm[1].fnptr = nativemultiplication;            jclass cls = (*env)->findclass(env, "com/example/hellondk/hellondkactivity");            // register methods env->registernatives.            (*env)->registernatives(env, cls, nm, 2);            return jni_version_1_6; } 

this example android native development kit cookbook.

and here usage message of nm

usage: /applications/xcode.app/contents/developer/toolchains/xcodedefault.xctoolchain/usr/bin/nm [-agnopruumxjlfap[s segname sectname] [-] [-t format] [[-arch ] ...] [file ...]

in os x -c option demangling symbols absent.

# nm libs/armeabi/libhello.so | c++filt -p -i 

you can instead use c++filt wrapper or invoke shown above.