A number of these sources are indeed shared (some compiler sources
are used by the library and/or some tools) and moving them is not
straightforward.
Would it be possible to add a --enable-small option to libada, which
would enable compilation of the subset used by GNAT? Then, one could
make libada build twice: as a host module with --enable-small, and as a
target module without the option.
1) Add a new "gcc_subdir" variable in config-lang.in. When set, configure
looks for a complete config-lang.in, makefile fragments (Make-lang.in),
lang tree files, ... in $(srcdir)/<lang_name>/<gcc_subdir>. When not
set it looks in $(srcdir)/<lang_name> as usual.
Could you please outline the final "look" of the filesystem? It would
seem to me that if everything was moved to libada, this would not be
necessary anymore. If you need this as a stopgap measure, it's fine by
me but I would like a comment in configure.ac saying that this is bound
to disappear and should not be used by other language front-ends.
In this case, by the way, the gengtype changes would also be less
necessary, and I could approve the configure.ac patch myself (note that
I have not finished reviewing it, so this is not --yet-- an approval).
Paolo
