[CMake] order of include dirs

[Alexander Neundorf]

> Von: Brad King <brad.king at kitware.com> 
>  
> Alexander Neundorf wrote: 
> > in KDE we have the problem that e.g. when compiling kdebase the 
> > headers  
> > in the source dir should be preferred over the installed ones.  
> > Usually we would do   
> > include_directories( ${KDE4_INCLUDES} ) in the toplevel 
> > CMakeLists.txt.  
> > When adding more include dirs in CMakeLists.txt in deeper 
> > directories, these directories will be appended to the list of 
> > include dirs, except when used with the BEFORE keyword.  
> > But now we cannot realistically expect that every KDE developer will  
> > always remember the BEFORE keyword.  
> > So we had two ideas:  
> > make the behaviour configurable:  
> > # make prepend default:  
> > set(CMAKE_INCLUDE_DIRS_APPEND false)   
> > # to force appending:  
> > include_directories(AFTER dir1 dir2)  
> >   
> > Problem here: moving cmake files around to another project where this  
> > isn't set would change the behaviour.  
> >   
> > Second idea:  
> >   
> > include_directories(LAST dir1 dir2)  
> >   
> > which would have the effect that the listed directories would always 
> > be used after all other include dirs specified without the "LAST" 
> > keyword.  
>  
> I think that will create two ordered lists of include directories 
> instead of one, which will just be confusing.   
 
What about the first idea ? 
I think this would fit good to the include_directories() command. 
 
Bye 
Alex 
 

-- 
Bis zu 70% Ihrer Onlinekosten sparen: GMX SmartSurfer!
Kostenlos downloaden: http://www.gmx.net/de/go/smartsurfer