fix cmake

paddle/math/CMakeLists.txt

@@ -16,10 +16,10 @@ file(GLOB MATH_HEADERS . *.h)
 file(GLOB MATH_SOURCES . *.cpp)
 
 if(NOT WITH_MKLDNN)
-    file(GLOB_RECURSE DNN_HEADER RELATIVE "${CMAKE_CURRENT_SOURCE_DIR}" "MKLDNN*.h")
-    file(GLOB_RECURSE DNN_SOURCES RELATIVE "${CMAKE_CURRENT_SOURCE_DIR}" "MKLDNN*.cpp")
-    list(REMOVE_ITEM MATH_HEADERS ${DNN_HEADER})
-    list(REMOVE_ITEM MATH_SOURCES ${DNN_SOURCES})
+    set(DNN_HEADER "${CMAKE_CURRENT_SOURCE_DIR}/MKLDNNMatrix.h")
+    set(DNN_SOURCE "${CMAKE_CURRENT_SOURCE_DIR}/MKLDNNMatrix.cpp")
+    list(REMOVE_ITEM MATH_HEADERS "${DNN_HEADER}")
+    list(REMOVE_ITEM MATH_SOURCES "${DNN_SOURCE}")
     message(STATUS "Skip compiling with MKLDNNMatrix")
 else()
     message(STATUS "Compile with MKLDNNMatrix")