Added c++14 to compile flags to fix the ieee128 issue

Makefile

@@ -20,10 +20,12 @@
 # DEALINGS IN THE SOFTWARE.
 #
 
+# CUB is released in cuda 11. Using c++11 or c++14 fixed the ieee128 issue.
+
 NVARCH ?= 70
 
 all:
-	nvcc -O3 -I. -I${CUBROOT} --compiler-options='-fPIC' -arch=sm_${NVARCH} --shared FOAM2CSR.cu -o libFOAM2CSR.so
+	nvcc -O3 -I. -I${CUBROOT} -std=c++14 --compiler-options='-fPIC -std=c++14' -arch=sm_${NVARCH} --shared FOAM2CSR.cu -o libFOAM2CSR.so
 
 clean:
 	rm -rf libFOAM2CSR.so