Turn on derived variables for testing

Author: anagainaru

CMakeLists.txt

@@ -195,7 +195,7 @@ adios_option(Sodium     "Enable support for Sodium for encryption" AUTO)
 adios_option(Catalyst   "Enable support for in situ visualization plugin using ParaView Catalyst" AUTO)
 adios_option(Campaign   "Enable support for Campaigns (requires SQLite3 and ZLIB)" AUTO)
 adios_option(AWSSDK     "Enable support for S3 compatible storage using AWS SDK's S3 module" OFF)
-adios_option(Derived_Variable    "Enable support for derived variables" OFF)
+adios_option(Derived_Variable    "Enable support for derived variables" ON)
 adios_option(PIP        "Enable support for pip packaging" OFF)
 adios_option(XRootD     "Enable support for XRootD" AUTO)
 adios_option(KVCACHE    "Enable support for KVCache" OFF)