Problem linking boost-python3 with xcode using macos - xcode

Question

I wish to use boost-python3 to wrap my C++ code in macos with xcode.
I want to use xcode because it is linked to JUCE music packages. I used a simple example taken from the boost tutorial:
#include <boost/python.hpp>
char const* greet()
{
return "hello, world";
}
BOOST_PYTHON_MODULE(hello_ext)
{
using namespace boost::python;
def("greet", greet);
}
When I compiled the code I got a linking problem.
I went over the existing documentation and questions and changed the include paths and library paths. Currently, I used these:
Header search path:
/usr/local/Cellar/python/3.7.3/Frameworks/Python.framework/Versions/3.7/include/python3.7m/
Library search path:
/usr/local/Cellar/python/3.7.3/Frameworks/Python.framework/Versions/3.7/lib/
This is the linking logs:
Ld build/Debug/Midi2KontaktDLL.dylib normal x86_64
cd /Users/didi/Development/Juce/Midi2KontaktDLL/Builds/MacOSX
export MACOSX_DEPLOYMENT_TARGET=10.11
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -arch x86_64 -dynamiclib -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.14.sdk -L/Users/didi/Development/Juce/Midi2KontaktDLL/Builds/MacOSX/build/Debug -L/usr/local/Cellar/boost-python3/1.70.0_1/lib -L/usr/local/Cellar/python/3.7.3/Frameworks/Python.framework/Versions/3.7/lib -F/Users/didi/Development/Juce/Midi2KontaktDLL/Builds/MacOSX/build/Debug -filelist /Users/didi/Library/Developer/Xcode/DerivedData/Midi2KontaktDLL-eupsdkbbrcwqymategfreyedipek/Build/Intermediates.noindex/Midi2KontaktDLL.build/Debug/Midi2KontaktDLL\ -\ Dynamic\ Library.build/Objects-normal/x86_64/Midi2KontaktDLL.LinkFileList -install_name /usr/local/lib/Midi2KontaktDLL.dylib -mmacosx-version-min=10.11 -Xlinker -object_path_lto -Xlinker /Users/didi/Library/Developer/Xcode/DerivedData/Midi2KontaktDLL-eupsdkbbrcwqymategfreyedipek/Build/Intermediates.noindex/Midi2KontaktDLL.build/Debug/Midi2KontaktDLL\ -\ Dynamic\ Library.build/Objects-normal/x86_64/Midi2KontaktDLL_lto.o -Xlinker -export_dynamic -Xlinker -no_deduplicate -stdlib=libc++ -framework Accelerate -framework AudioToolbox -framework Carbon -framework Cocoa -framework CoreAudio -framework CoreMIDI -framework IOKit -framework OpenGL -framework QuartzCore -framework WebKit -compatibility_version 1 -current_version 1 -Xlinker -dependency_info -Xlinker /Users/didi/Library/Developer/Xcode/DerivedData/Midi2KontaktDLL-eupsdkbbrcwqymategfreyedipek/Build/Intermediates.noindex/Midi2KontaktDLL.build/Debug/Midi2KontaktDLL\ -\ Dynamic\ Library.build/Objects-normal/x86_64/Midi2KontaktDLL_dependency_info.dat -o /Users/didi/Development/Juce/Midi2KontaktDLL/Builds/MacOSX/build/Debug/Midi2KontaktDLL.dylib
and the error I get:
Undefined symbols for architecture x86_64:
"_PyUnicode_Type", referenced from:
boost::python::to_python_value<char const* const&>::get_pytype()
const in Source.o
"__Py_NoneStruct", referenced from:
boost::python::api::object::object() in Source.o
"boost::python::detail::init_module(PyModuleDef&, void (*)())",
referenced from:
_PyInit_hello_ext in Source.o
"boost::python::detail::gcc_demangle(char const*)", referenced
from:
boost::python::type_info::name() const in Source
"boost::python::detail::scope_setattr_doc(char const*,
boost::python::api::object const&, char const*)", referenced from:
void boost::python::def<char const* (*)()>(char const*, char const*
(*)()) in Source.o
Thanks!!!