[CMake] make clean is not working in subprojects

[Brad King]

Alexander Neundorf wrote:
>>Von: Filipe Sousa <filipe at ipb.pt> 
>> 
>>I just update cmake from cvs and now I have a few problems with 
>>subprojects 
> 
>  
> I have the impression that the new makefile generator 3 still has several 
> issues. Do the advantages of the flat makefiles over the makefiles as 
> generated by makefile generator 1 really outweigh the problems ? 

Don't forget that you started using the original makefile generator 
after others had beat on it and tweaked it for 3 years.  The flat 
makefile design has several technical advantages, but the generator is 
still young so the usability details have not yet been hammered out.  We 
considered leaving the old generator in place and giving the new 
generator a new name but decided we didn't want to support 2 versions.

-Brad