>   I think I found the problem. Where is APR_INCLUDE_DIR
> set from
> APR_INCLUDE_DIR_INT?? All I find is:
> 
>   EXEC_PROGRAM(${APR_CONFIG} ARGS "--includedir"
> OUTPUT_VARIABLE
> APR_INCLUDE_DIR_INT)
> 
>   which works to set APR_INCLUDE_DIR_INT, but I can't
> find anywhere that there is a:
> 
> SET(APR_INCLUDE_DIR ${APR_INCLUDE_DIR_INT})

I believe cmake generates the variable when the pkg config test is performed. cmake generates many internal variables.

Darrell