[CMake] Checking for empty list

[Michael Wild]

On 11/25/2011 02:52 PM, Daniel Dekkers wrote:
> Hi,
> 
>  
> 
> I know it should be out there somewhere in the documentation, but can’t
> find it.
> 
> How do I check for an empty list?
> 
> I can use LIST(LENGTH MYLIST LISTCOUNT) with an extra variable LISTCOUNT
> but isn’t there a single command?
> 
>  
> 
> Thanks,
> 
> Daniel
> 


An empty list is an empty variable, and evaluates to FALSE. So you can use

if(NOT MYLIST)
  message("Either MYLIST is empty or otherwise FALSE")
endif()

Michael