Q: Multiple GNAT project files and object directories

[gautier_niouzes@hotmail.com]

Hello,

Quick question (probably with a long answer ;-) ):
How do I force all object files to land into a single directory, including the object files of "with"-ed projects ?

With
   for Object_Dir use "obj";
only the object files for the project are put into it.
The "with"-ed projects have their own Object_Dir's, and their object files appear there. Fair enough.
Now I have a more complicated situation: a main project with different build modes. So the Object_Dir depends on this build mode:
   case Build_Mode is
      when "Debug" =>
         for Object_Dir use "../obj/debug";
      when "Fast" =>
         for Object_Dir use "../obj/fast";
      when "Profiling" =>
         for Object_Dir use "../obj/profiling";
   end case;
The snag is: the "with"-ed projects do not know about that and use only their own single Object_Dir. GNAT is smart enough to recompile everything in the "with"-ed projects upon a build mode change. But it makes the build very long each time a mode is changed. At worst we would have different sets of compiler options in the object files to be linked.
TIA for any clue...
_________________________ 
Gautier's Ada programming 
http://sf.net/users/gdemont