Error while building Preferences.app

[Rubens_Septimus]

While trying to build Preferences.app I meet this error :
 
Compiling file PrefsApp.m ...
cc1obj: warnings being treated as errors
PrefsApp.m: Dans la fonction «getBoolDefault» :
PrefsApp.m:98: attention : pas de méthode «-nextObject» trouvée
PrefsApp.m:98: attention : (Messages sans une méthode concordante de
signature
PrefsApp.m:98: attention : will be assumed to return «id» and accept
PrefsApp.m:98: attention : «...» comme argument.)
make[2]: *** [obj/PrefsApp.o] Erreur 1
make[1]: *** [PrefsApp.all.bundle.variables] Erreur 2
make[1]: quittant le répertoire «
/home/patrick/gnubuntu01/SOURCE/Preferences-1.2.0/Modules/PrefsApp »
make: *** [internal-all] Erreur 2

Any idea ?
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