There seems to be an issue with the new flag resources (at least I think it's due to this): ResComp1 /Volumes/Data/devel/haiku/trunk/generated-x86-gcc4/objects/haiku/x86/common/kits/locale/CountryFlags.rsrc <stdin>:1:3: error: invalid preprocessing directive #Flag <stdin>:16:3: error: invalid preprocessing directive #Flag <stdin>:25:3: error: invalid preprocessing directive #Flag Forcing a rebuild of rc doesn't seem to be enough to fix this. It doesn't stop the build though, why doesn't rc return an error in this case ? François.