my concern here is we would be duplicating code and still need an extra if statement beyond what is in the code currently to check for aprutil. 

If we do stay with doing the check purely in commonSetup.cmake, the following should be used.

```
if(USE_APR)
        find_package(APR)
        if (APR_FOUND)
          add_definitions (-D_USE_APR)
          include_directories(${APR_INCLUDE_DIR})
          link_directories(${APR_LIBRARIES})
        else()
          message(FATAL_ERROR "APR requested but package not found")
        endif()
        if (APRUTIL_FOUND)
          include_directories(${APRUTIL_INCLUDE_DIR})
          link_directories(${APRUTIL_LIBRARIES})
        else()
          message(FATAL_ERROR "APRUTIL requested but package not found")
        endif()
      else()
        add_definitions (-D_NO_APR)
      endif(USE_APR)
```