Cmake在Mac OSX上使用框架进行编译,并像.m/.mm那样处理.cpp文件

我正在寻找一个提示,让下面的工作,这是我的CMakeLists.txt文件

# cmake_minimum_required(2.8.2)

project(boilerplate)

# base files
set(src_files
  src/greet.h
  src/main.cpp
)

# if on OSX, these files are needed
if(APPLE)

  SET(CMAKE_EXE_LINKER_FLAGS "-framework Foundation -w")

  set(src_files
    ${src_files}
    src/mac/greet.mm
    src/mac/greeting.h
    src/mac/greeting.m
  )
endif()

# if on windows, these files are needed
if(WIN32)
  set(src_files
    ${src_files}
    src/win/greet.cpp
  )
endif()

add_executable(greeting
  ${src_files}
)

我要求在OXX .CPP文件上处理类似.mm文件(但不在Windows上),并且我可以加载核心基础等框架。我是一个完全的cmake新手,所以我甚至不知道从哪里开始,但我希望我的方向是正确的,目前的输出是:

$ cmake CMakeLists.txt && make
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/leehambley/Projects/watched.it-client
Scanning dependencies of target greeting
[ 33%] Building CXX object CMakeFiles/greeting.dir/src/mac/greet.o
Linking CXX executable greeting
Undefined symbols:
  "greet()", referenced from:
      _main in main.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
make[2]: *** [greeting] Error 1
make[1]: *** [CMakeFiles/greeting.dir/all] Error 2
make: *** [all] Error 2
1