updates configuration, adds option for cuda9 (Volta)

Makefile.in

@@ -111,7 +111,6 @@ SCOTCH_FLAGS = @FC_DEFINE@USE_SCOTCH $(SCOTCH_INC)
 @COND_CUDA_TRUE@CUDA = yes
 @COND_CUDA_FALSE@CUDA = no
 
-# CUDA version 5x & 6x
 @COND_CUDA5_TRUE@CUDA5 = yes
 @COND_CUDA5_FALSE@CUDA5 = no
 
@@ -121,12 +120,18 @@ SCOTCH_FLAGS = @FC_DEFINE@USE_SCOTCH $(SCOTCH_INC)
 @COND_CUDA7_TRUE@CUDA7 = yes
 @COND_CUDA7_FALSE@CUDA7 = no
 
+@COND_CUDA8_TRUE@CUDA8 = yes
+@COND_CUDA8_FALSE@CUDA8 = no
+
+@COND_CUDA8_TRUE@CUDA9 = yes
+@COND_CUDA8_FALSE@CUDA9 = no
+
 # CUDA compilation with linking
 @COND_CUDA_PLUS_TRUE@CUDA_PLUS = yes
 @COND_CUDA_PLUS_FALSE@CUDA_PLUS = no
 
 # default cuda libraries
-# runtime library -lcudart -lcuda and -lcublas needed
+# runtime library -lcudart needed, others are optional -lcuda -lcublas
 
 CUDA_FLAGS = @CUDA_FLAGS@
 CUDA_INC = @CUDA_CPPFLAGS@ -I${SETUP}
@@ -144,18 +149,27 @@ CUDA_LINK = @CUDA_LDFLAGS@ @CUDA_LIBS@ -lstdc++
 # Kepler (cuda5) : -gencode=arch=compute_35,code=sm_35
 # Kepler (cuda6.5,K80): -gencode=arch=compute_37,code=sm_37
 # Maxwell (cuda6.5+/cuda7,Quadro K2200): -gencode=arch=compute_50,code=sm_50
+# Pascal (cuda8,P100): -gencode=arch=compute_60,code=sm_60
+# Volta (cuda9,V100): -gencode=arch=compute_70,code=sm_70
 GENCODE_20 = -gencode=arch=compute_20,code=\"sm_20,compute_20\"
 GENCODE_30 = -gencode=arch=compute_30,code=\"sm_30,compute_30\"
 GENCODE_35 = -gencode=arch=compute_35,code=\"sm_35,compute_35\"
 GENCODE_37 = -gencode=arch=compute_37,code=\"sm_37\"
 GENCODE_50 = -gencode=arch=compute_50,code=\"sm_50\"
-
+GENCODE_60 = -gencode=arch=compute_60,code=\"sm_60,compute_60\"
+GENCODE_70 = -gencode=arch=compute_70,code=\"sm_70,compute_70\"
+
+# cuda preprocessor flag
+# CUDA version 9.0
+@COND_CUDA_TRUE@@COND_CUDA8_TRUE@GENCODE = $(GENCODE_70) $(FC_DEFINE)GPU_DEVICE_Volta
+# CUDA version 8.0
+@COND_CUDA_TRUE@@COND_CUDA8_TRUE@GENCODE = $(GENCODE_60) $(FC_DEFINE)GPU_DEVICE_Pascal
 # CUDA version 7.x
-@COND_CUDA_TRUE@@COND_CUDA7_TRUE@GENCODE = $(GENCODE_50)
+@COND_CUDA_TRUE@@COND_CUDA7_TRUE@GENCODE = $(GENCODE_50) $(FC_DEFINE)GPU_DEVICE_Maxwell
 # CUDA version 6.5
-@COND_CUDA_TRUE@@COND_CUDA6_TRUE@GENCODE = $(GENCODE_37)
+@COND_CUDA_TRUE@@COND_CUDA6_TRUE@GENCODE = $(GENCODE_37) $(FC_DEFINE)GPU_DEVICE_K80
 # CUDA version 5.x
-@COND_CUDA_TRUE@@COND_CUDA5_TRUE@GENCODE = $(GENCODE_35)
+@COND_CUDA_TRUE@@COND_CUDA5_TRUE@GENCODE = $(GENCODE_35) $(FC_DEFINE)GPU_DEVICE_K20
 # CUDA version 4.x
 @COND_CUDA_TRUE@@COND_CUDA_PLUS_FALSE@GENCODE = $(GENCODE_20)
 
@@ -292,10 +306,18 @@ help:
 
 #######################################
 
+${SETUP}/version.fh: @GIT_VERSION_DEPS@
+	@echo "GEN $@"
+	@echo "! This file is generated by Make. Do not edit this file!" > $@
+	@echo "character(len=*), parameter :: git_version = \"$$(cd ${S_TOP} && git describe --tags)\"" >> $@
+
+#######################################
+
 
 # Get dependencies and rules for building stuff
 include $(patsubst %, ${S_TOP}/src/%/rules.mk, $(SUBDIRS))
 
+
 #######################################
 
 ##
@@ -323,6 +345,6 @@ $(foreach dir, $(SUBDIRS), $(eval $(call shortcut,$(dir))))
 test : tests
 
 # Other old shortcuts
-mesh : $E/xmeshfem2D
-spec : $E/xspecfem2D
+mesh: $E/xmeshfem2D
+spec: $E/xspecfem2D
 .PHONY: mesh spec