local addons errors, make, osx

I try to use local addons in osx, using the makefile.
I have the following directory structure.

Thomass-MacBook-Pro-4:networkTcpClientExample thomasgeissl$ pwd
/Users/thomasgeissl/programming/of/ofTG/apps/localAddonsTest/networkTcpClientExample
Thomass-MacBook-Pro-4:networkTcpClientExample thomasgeissl$ ls 
Makefile    addons.make bin     local_addons    obj     src
Thomass-MacBook-Pro-4:networkTcpClientExample thomasgeissl$ cat addons.make 
./local_addons/ofxNetwork
Thomass-MacBook-Pro-4:networkTcpClientExample thomasgeissl$ ls local_addons/
ofxNetwork

when I try to compile, I get duplicate symbols errors:

duplicate symbol __ZN12ofxTCPClient10receiveRawEv in:
    obj/osx/Release/local_addons/ofxNetwork/src/ofxTCPClient.o
    /Users/thomasgeissl/programming/of/ofTG/apps/localAddonsTest/networkTcpClientExample/obj/osx/Release/addons/ofxNetwork/src/ofxTCPClient.o

This happens also when i try to compile opencvExample with ofxOpenCv included, I havent tested others. Trying to compile oscReceiveExample with ofxOsc locally, it includes ofxOsc/libs/oscpack/src/ip/win32/*

/Users/thomasgeissl/programming/of/ofTG/apps/localAddonsTest/oscReceiveExample/local_addons/ofxOsc/libs/oscpack/src/ip/win32/NetworkingUtils.cpp:39:10: fatal error: 'winsock2.h' file not found
#include <winsock2.h>   // this must come first to prevent errors with MSVC7

Start with the example Makefile and addons.make, then trace how local_addons/ofxNetwork and the standard addons/ofxNetwork paths both enter the build. Compare the ofxOsc source selected on macOS, including the reported oscpack win32 path. Done means the examples build without duplicate symbols or the Windows-only winsock2.h error.