Fix CUDA defines for compilation

samples/cuda/Makefile

@@ -4,12 +4,8 @@ include $(AMGINCDIR)/Make.inc.amg4psblas
 AMGMODDIR=$(AMGDIR)/modules
 AMGLIBDIR=$(AMGDIR)/lib
 AMG_LIBS=-L$(AMGLIBDIR) -lpsb_krylov -lamg_prec -lpsb_prec
-# To compile these example you need to have also installed PSBLAS-EXT, SPGPU and
-# CUDA. Please refer to the documentation of AMG4PSBLAS and PSBLAX-EXT for the
-# full details.
-# This define the variables : PSBGPULDLIBS, LIBRSB_INCLUDES, and CUDA_INCLUDES
-#PSBEXT_DIR= #< FILL-ME >
-#include $(PSBEXT_DIR)/include/Make.inc.ext
+# This code will include the appropriate defines and libraries
+# if you have compiled the main PSBLAS library with CUDA support
 include $(PSBLASDIR)/include/Make.inc.psblas
 PSBLIBDIR=$(PSBLASDIR)/lib/
 FINCLUDES=$(FMFLAG). $(FMFLAG)$(AMGMODDIR) $(FMFLAG)$(AMGINCDIR) \
@@ -17,6 +13,7 @@ $(PSBLAS_INCLUDES) $(FIFLAG).
 AMG_LIB=-L$(AMGLIBDIR) -lamg_prec 
 PSBLAS_LIB= -L$(PSBLIBDIR)  -lpsb_linsolve  -lpsb_prec -lpsb_util -lpsb_ext  \
 	 -lpsb_base 
+FDEFINES=$(AMGFDEFINES) $(FCUDEFINES)
 
 LINKOPT=-lstdc++