Re: reverted ssp/ffi/gomp changes
Matthias Klose <email@example.com> writes:
> sorry, I reverted these changes from r2167; gcj did fail to build,
> because the gcj build gets configured with --disable-libffi.
Well the problem then is at rules.defs:753, where gcj explicitly
disables libffi by setting "with_libffi := no".
> there is
> a distinction of building the compiler with this support, and building
> packages from it. If you think the savings in not building these while
> building gnat are worth it, you should do something like is done as
> wist_ssp / with_libspp.
Yes, maybe, but could you please explain the distinction? With SSP,
we do change the compiler flags (i.e. we forcibly remove any
-fno-stack-protector) but I cannot see an equivalent for FFI. As far
as I understand, libffi is just a library and does not involve
compiler flags. Am I wrong?
It would be nice to document these things, too, like the difference
between with_ssp and with_libssp and whether they are orthogonal (I
suspect they're not; I think with_libssp probably requires with_ssp).
The reason for my changes was not only build time, but also to make
the build less "astonishing". I don't mind building SSP or FFI if I
have to, but I'd like to know why :)