use -sinteger64 flag for 64-bit integers

Author: ajaypanyala

CMakeLists.txt

@@ -53,9 +53,8 @@ if(BUILD_INDEX64)
   set(LAPACKELIB "lapacke64")
   set(TMGLIB "tmglib64")
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DWeirdNEC -DLAPACK_ILP64 -DHAVE_LAPACK_CONFIG_H")
-  
   if(CMAKE_Fortran_COMPILER_ID STREQUAL "Cray")
-    set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -default64")
+    set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -sinteger64")
   else()
     set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -fdefault-integer-8")  
   endif()