Writing a Subscriber in Python

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Hello all,

I am trying to write a subscriber program in ROS fuerte with python and I get this error after I type "rosmake packagename" to build my package. I have "import rospy " in the python code but still I get some errors. The error I get is CMake cannot determine linker language for target(then it appears the name of python program)

I am following the ros tutorials and as far as my knowledge I have considered all steps necasary for writing a subscriber.

Can you please help me with my issue?

Here is the code for CMake.txt:

cmake_minimum_required(VERSION 2.4.6)
include($ENV{ROS_ROOT}/core/rosbuild/rosbuild.cmake)
rosbuild_init()
set(EXECUTABLE_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/bin)
set(LIBRARY_OUTPUT_PATH ${PROJECT_SOURCE_DIR}/lib)
rosbuild_add_executable(WhichFace src/WhichFace.py)

and here is the code for Manifest.xml

 <package>
  <description brief="finalPhone">finalPhone  </description>
  <author>pi</author>
  <license>BSD</license>
  <review status="unreviewed" notes=""/>
  <url>http://ros.org/wiki/finalPhone</url>
  <depend package="std_msgs"/>
  <depend package="rospy"/>
</package>

Thanks,