Mac keystrokes using the minDevkit

#include <CoreGraphics/CoreGraphics.h>
#include <ApplicationServices/ApplicationServices.h>
#include <Carbon/Carbon.h>

message<> number {this, "int", 
        MIN_FUNCTION {
            int key = 56;
            //EDIT: this code is close to correct, but definitely don't trust it.
            //there are better examples on Stack Overflow, if you are really stuck
            //comment and could share something better. Also, it appears
            //olsen put 11strokes code up on Github. It says it's cross platform, so it
            //may be a better and more comprehensive source than what I could offer.
            
            // Create an HID hardware event source
            CGEventSourceRef src = CGEventSourceCreate(kCGEventSourceStateHIDSystemState);
            
            // Create a new keyboard key press event
            CGEventRef evt = CGEventCreateKeyboardEvent(src, (CGKeyCode) key, true);
            
            // Post keyboard event and release
            CGEventPost (kCGHIDEventTap, evt);
            CFRelease (evt);
            CFRelease (src);
 
            //this line printed before I added the above
            cout<< "Sometimes I work, sometimes I don't" << endl;
            return {};
        }
    };

Undefined symbols for architecture x86_64:
"_CFRelease", referenced from:
      hello_world::number::'lambda'(std::__1::vector<c74::min::atom, hello_world::number::allocator<c74::min>> const&, int)::operator()(std::__1::vector<c74::min::atom, hello_world::number::allocator<c74::min>> const, int) const in min.hello-world.o
  "_CGEventCreateKeyboardEvent", referenced from:
      hello_world::number::'lambda'(std::__1::vector<c74::min::atom, hello_world::number::allocator<c74::min>> const&, int)::operator()(std::__1::vector<c74::min::atom, hello_world::number::allocator<c74::min>> const, int) const in min.hello-world.o
  "_CGEventPost", referenced from:
      hello_world::number::'lambda'(std::__1::vector<c74::min::atom, hello_world::number::allocator<c74::min>> const&, int)::operator()(std::__1::vector<c74::min::atom, hello_world::number::allocator<c74::min>> const, int) const in min.hello-world.o
  "_CGEventSourceCreate", referenced from:
      hello_world::number::'lambda'(std::__1::vector<c74::min::atom, hello_world::number::allocator<c74::min>> const&, int)::operator()(std::__1::vector<c74::min::atom, hello_world::number::allocator<c74::min>> const, int) const in min.hello-world.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

# Copyright 2018 The Min-DevKit Authors. All rights reserved.
# Use of this source code is governed by the MIT License found in the License.md file.
cmake_minimum_required(VERSION 3.0)
set(C74_MIN_API_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../min-api)
include(${C74_MIN_API_DIR}/script/min-pretarget.cmake)
#############################################################
# MAX EXTERNAL
#############################################################
include_directories( 
	"${C74_INCLUDES}"
	"/System/Library/Frameworks/CoreFoundation.framework/Headers"
    	"/System/Library/Frameworks/ApplicationServices.framework/Headers"
    	"/System/Library/Frameworks/Carbon.framework/Headers" 
    	"/System/Library/Frameworks/CoreGraphics.framework/Headers"
)
set( SOURCE_FILES
	${PROJECT_NAME}.cpp
)

add_library( 
	${PROJECT_NAME} 
	MODULE
	${SOURCE_FILES}
)

target_link_libraries(  
	${PROJECT_NAME}
	"${C74_LIBS}"
	"-framework CoreFoundation" 
    	"-framework ApplicationServices"
    	"-framework Carbon"  
    	"-framework CoreGraphics"
)

include(${C74_MIN_API_DIR}/script/min-posttarget.cmake)
#############################################################
# UNIT TEST
#############################################################
include(${C74_MIN_API_DIR}/test/min-object-unittest.cmake)