intial version of sync wrapper

Makefile

@@ -1,8 +1,8 @@
 export CC  = gcc
 export CXX = g++
+export MPICXX = mpicxx
 export LDFLAGS= -pthread -lm 
-
-export CFLAGS = -Wall -O3 -msse2  -Wno-unknown-pragmas -fPIC -pedantic 
+export CFLAGS = -Wall -O3 -msse2  -Wno-unknown-pragmas -fPIC 
 
 ifeq ($(no_omp),1)
 	CFLAGS += -DDISABLE_OPENMP 
@@ -13,11 +13,13 @@ endif
 # specify tensor path
 BIN = xgboost
 OBJ = updater.o gbm.o io.o
+MPIOBJ = sync.o
+MPIBIN = test/test
 SLIB = wrapper/libxgboostwrapper.so 
 
 .PHONY: clean all python Rpack
 
-all: $(BIN) $(OBJ) $(SLIB) 
+all: $(BIN) $(OBJ) $(SLIB) $(MPIOBJ) $(MPIBIN)
 
 python: wrapper/libxgboostwrapper.so
 # now the wrapper takes in two files. io and wrapper part
@@ -25,8 +27,10 @@ wrapper/libxgboostwrapper.so: wrapper/xgboost_wrapper.cpp $(OBJ)
 updater.o: src/tree/updater.cpp  src/tree/*.hpp src/*.h src/tree/*.h
 gbm.o: src/gbm/gbm.cpp src/gbm/*.hpp src/gbm/*.h
 io.o: src/io/io.cpp src/io/*.hpp src/utils/*.h src/learner/dmatrix.h src/*.h
+sync.o: src/sync/sync.cpp 
 xgboost: src/xgboost_main.cpp src/utils/*.h src/*.h src/learner/*.hpp src/learner/*.h $(OBJ)
 wrapper/libxgboostwrapper.so: wrapper/xgboost_wrapper.cpp src/utils/*.h src/*.h src/learner/*.hpp src/learner/*.h $(OBJ)
+test/test: test/test.cpp sync.o
 
 $(BIN) : 
 	$(CXX) $(CFLAGS) $(LDFLAGS) -o $@ $(filter %.cpp %.o %.c, $^)
@@ -37,6 +41,12 @@ $(SLIB) :
 $(OBJ) : 
 	$(CXX) -c $(CFLAGS) -o $@ $(firstword $(filter %.cpp %.c, $^) )
 
+$(MPIOBJ) : 
+	$(MPICXX) -c $(CFLAGS) -o $@ $(firstword $(filter %.cpp %.c, $^) )
+
+$(MPIBIN) : 
+	$(MPICXX) $(CFLAGS) $(LDFLAGS) -o $@ $(filter %.cpp %.o %.c, $^)
+
 install:
 	cp -f -r $(BIN)  $(INSTALL_PATH)