[CMake] Move Python wrapping dependencies to binding/python

CMakeLists.txt

@@ -110,7 +110,6 @@ SET(BOOST_BUILD_COMPONENTS unit_test_framework)
 SET(BOOST_OPTIONAL_COMPONENTS "")
 
 IF(BUILD_PYTHON_INTERFACE)
-  ADD_SEPARATE_DEPENDENCY("eigenpy >= 1.3.1")
   SET(BOOST_OPTIONAL_COMPONENTS ${BOOST_OPTIONAL_COMPONENTS} python)
   FINDPYTHON(2.7 EXACT REQUIRED)
   INCLUDE_DIRECTORIES(${PYTHON_INCLUDE_DIRS}) 

bindings/python/CMakeLists.txt

@@ -50,8 +50,13 @@ MACRO(SYMLINK_AND_INSTALL_HEADERS HEADERS SUBPATH)
   ENDFOREACH(header)
 ENDMACRO(SYMLINK_AND_INSTALL_HEADERS HEADERS SUBPATH)
 
-# --- LIBRARY --- #
+# --- DEPENDENCIES --- #
+SET(PKG_CONFIG_PYWRAP_REQUIRES "eigenpy >= 1.3.1")
+FOREACH(dep ${PKG_CONFIG_PYWRAP_REQUIRES})
+  ADD_SEPARATE_DEPENDENCY(${dep})
+ENDFOREACH(dep ${PKG_CONFIG_PYWRAP_REQUIRES})
 
+# --- LIBRARY --- #
 SET(${PROJECT_NAME}_PYTHON_HEADERS
   eigen_container.hpp
   handler.hpp