removed CMAKE_CXX_STANDARD:=17 since it is not supported in cmake (<3.10)

CMakeLists.txt

@@ -27,7 +27,11 @@ else()
   set (KOKKOS_ENABLE_DEBUG ON)
 endif()
 
-set(CMAKE_CXX_STANDARD "17")
+
+# Pastis default compiler flags
+set(PASTIS_CXX_FLAGS "-Wall")
+
+#set(CMAKE_CXX_STANDARD "17")
 
 add_subdirectory(${PASTIS_SOURCE_DIR}/packages/kokkos)
 include_directories(${Kokkos_INCLUDE_DIRS_RET})
@@ -39,9 +43,6 @@ if(NOT CMAKE_BUILD_TYPE)
       FORCE)
 endif(NOT CMAKE_BUILD_TYPE)
 
-# Pastis default compiler flags
-set(PASTIS_CXX_FLAGS "-Wall")
-
 # Kokkso compiler flags
 include(GetKokkosCompilerFlags)