Update Mac OS X port

* follow comments to fix bugs

Author: gangliao

cmake/cblas.cmake

@@ -44,8 +44,8 @@ set(ATLAS_LIB_SEARCH_PATHS
         /usr/lib
         /usr/lib/blas/atlas
         /usr/lib/atlas
-        /usr/lib/atlas-base)   # special for ubuntu 14.04.
-
+        /usr/lib/atlas-base   # special for ubuntu 14.04.
+    )
 find_path(ATLAS_INC_DIR NAMES cblas.h 
   PATHS ${ATLAS_INCLUDE_SEARCH_PATHS})
 find_library(ATLAS_CBLAS_LIB NAMES cblas libcblas.so.3 

cmake/util.cmake

@@ -24,7 +24,9 @@ function(target_circle_link_libraries TARGET_NAME)
                 list(APPEND libsInArgn ${arg})
             endif()
         endforeach()
-
+        if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+            list(APPEND LIBS "-undefined dynamic_lookup")
+        endif()
         list(REVERSE libsInArgn)
         target_link_libraries(${TARGET_NAME}
             ${LIBS}