Updated cuda parameters in makefiles

Allwmake.firstInstall

@@ -35,6 +35,31 @@ then
     fi
 fi 
 
+# Check whether we will be compiling cudaSolvers
+if [ -f $CUDA_BIN_DIR/nvcc ]
+then
+    echo
+    echo "Cuda compiler detected at $CUDA_BIN_DIR/nvcc;"
+    echo "cudaSolvers will be compiled by default."
+    echo
+
+    # If yes, check presence of $CUDA_ARCH 
+    if [ -z "$CUDA_ARCH" ]
+    then
+        echo
+        echo "\$CUDA_ARCH is required by nvcc compiler but not set."
+        echo "Check section '-gpu-architecture' in 'man nvcc' for details." 
+        echo
+        read -r -p "Proceed without compiling cudaSolvers? [Y/n] " response
+        if [[ $response =~ ^([nN][oO]|[nN])$ ]]
+        then
+            exit 0
+        fi
+        export CUDA_IGNORE
+    fi
+    echo "Cuda architecture set to: $CUDA_ARCH"
+fi
+
 # wmake is required for subsequent targets
 ( cd wmake/src && make )
 

src/cudaSolvers/Allwmake

@@ -3,11 +3,15 @@ cd ${0%/*} || exit 1    # run from this directory
 
 if [ -f $CUDA_BIN_DIR/nvcc ] 
 then
+    if [ -z $CUDA_IGNORE ]
+    then
+        echo "Found nvcc but \$CUDA_IGNORE set -- not  enabling CUDA support."
+    else
         echo "Found nvcc  --  enabling CUDA support."
         wmake libso
+    fi 
 else
     echo "No nvcc - CUDA not available."
 fi
 
-
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