diff -ru -x '*~' gmatrix_orig/src/Makefile gmatrix/src/Makefile
--- gmatrix_orig/src/Makefile	2014-08-27 02:42:04.000000000 +0900
+++ gmatrix/src/Makefile	2014-10-25 15:35:29.797202981 +0900
@@ -21,6 +21,7 @@
 # to the manual on the gmatrix install instructions)
 CUDA_LIB_PATH ?= /usr/local/cuda/lib64
 R_INC_PATH    ?= /usr/include/R
+CUDA_INC_PATH ?= /usr/local/cuda/include
 
 
 # Nvidia CUDA Compiler
@@ -49,25 +50,25 @@
 # Build rules
 build: $(OUT_OBJ)
 	$(R_CC) $(OUT_OBJ) -o $(OUT_SO) $(LIBS) -L$(CUDA_LIB_PATH)
-	
+
 conversions.o: 
-	$(NVCC) -c conversions.cu -o conversions.o $(NVCC_FLAGS)  -I$(R_INC_PATH)
-	
+	$(NVCC) -c conversions.cu -o conversions.o $(NVCC_FLAGS)  -I$(R_INC_PATH) -I${CUDA_INC_PATH}
+
 manipulation.o: 
-	$(NVCC) -c manipulation.cu -o manipulation.o $(NVCC_FLAGS)  -I$(R_INC_PATH)
+	$(NVCC) -c manipulation.cu -o manipulation.o $(NVCC_FLAGS)  -I$(R_INC_PATH) -I${CUDA_INC_PATH}
 
 general.o:
-	$(NVCC) -c general.cu -o general.o $(NVCC_FLAGS) -I$(R_INC_PATH)
+	$(NVCC) -c general.cu -o general.o $(NVCC_FLAGS) -I$(R_INC_PATH) -I${CUDA_INC_PATH}
 
 matrix.o: 
-	$(NVCC) -c matrix.cu -o matrix.o $(NVCC_FLAGS) -I$(R_INC_PATH)
- 	
+	$(NVCC) -c matrix.cu -o matrix.o $(NVCC_FLAGS) -I$(R_INC_PATH) -I${CUDA_INC_PATH}
+
 ops.o: 
-	$(NVCC) -c ops.cu -o ops.o $(NVCC_FLAGS) -I$(R_INC_PATH)
-	
+	$(NVCC) -c ops.cu -o ops.o $(NVCC_FLAGS) -I$(R_INC_PATH) -I${CUDA_INC_PATH}
+
 dist.o: 
-	$(NVCC) -c dist.cu -o dist.o $(NVCC_FLAGS) -I$(R_INC_PATH)
- 	
+	$(NVCC) -c dist.cu -o dist.o $(NVCC_FLAGS) -I$(R_INC_PATH) -I${CUDA_INC_PATH}
+
 
 clean:
 	-rm -f *.o core