fix mac

Makefile

@@ -1,6 +1,6 @@
 export CC  = gcc
 export CXX = g++
-export CFLAGS = -Wall -O3 -msse2  -Wno-unknown-pragmas -fopenmp
+export CFLAGS = -Wall -O3 -msse2  -Wno-unknown-pragmas 
 
 # specify tensor path
 BIN = xgboost

python/xgboost.py

@@ -44,7 +44,8 @@ class DMatrix:
             self.handle = None
             return
         if isinstance(data, str):
-            self.handle = xglib.XGDMatrixCreateFromFile(ctypes.c_char_p(data.encode('utf-8')), 1)
+            self.handle = ctypes.c_void_p(
+                xglib.XGDMatrixCreateFromFile(ctypes.c_char_p(data.encode('utf-8')), 1))
         elif isinstance(data, scp.csr_matrix):
             self.__init_from_csr(data)            
         elif isinstance(data, numpy.ndarray) and len(data.shape) == 2:
@@ -62,17 +63,17 @@ class DMatrix:
     # convert data from csr matrix
     def __init_from_csr(self, csr):
         assert len(csr.indices) == len(csr.data)
-        self.handle = xglib.XGDMatrixCreateFromCSR(
+        self.handle = ctypes.c_void_p(xglib.XGDMatrixCreateFromCSR(
             (ctypes.c_ulong  * len(csr.indptr))(*csr.indptr),
             (ctypes.c_uint  * len(csr.indices))(*csr.indices),
             (ctypes.c_float * len(csr.data))(*csr.data),
-            len(csr.indptr), len(csr.data))
+            len(csr.indptr), len(csr.data)))
     # convert data from numpy matrix
     def __init_from_npy2d(self,mat,missing):
         data = numpy.array(mat.reshape(mat.size), dtype='float32')
-        self.handle = xglib.XGDMatrixCreateFromMat(
+        self.handle = ctypes.c_void_p(xglib.XGDMatrixCreateFromMat(
             data.ctypes.data_as(ctypes.POINTER(ctypes.c_float)),
-            mat.shape[0], mat.shape[1], ctypes.c_float(missing))
+            mat.shape[0], mat.shape[1], ctypes.c_float(missing)))
     # destructor
     def __del__(self):
         xglib.XGDMatrixFree(self.handle)
@@ -103,8 +104,8 @@ class DMatrix:
     # slice the DMatrix to return a new DMatrix that only contains rindex
     def slice(self, rindex):
         res = DMatrix(None)
-        res.handle = xglib.XGDMatrixSliceDMatrix(
-            self.handle, (ctypes.c_int*len(rindex))(*rindex), len(rindex))
+        res.handle = ctype.c_void_p(xglib.XGDMatrixSliceDMatrix(
+            self.handle, (ctypes.c_int*len(rindex))(*rindex), len(rindex)))
         return res
 
 class Booster:

src/io/simple_dmatrix-inl.hpp

@@ -196,7 +196,7 @@ class DMatrixSimple : public DataMatrix {
   /*! \brief data in the row */
   std::vector<SparseBatch::Entry> row_data_;
   /*! \brief magic number used to identify DMatrix */
-  static const int kMagic = 0xff01;
+  static const int kMagic = 0xffffab01;
 
  protected:
   // one batch iterator that return content in the matrix