[Bug ada/81878] --disable-bootstrap --enable-languages=ada fails

[aoliva at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81878

--- Comment #51 from Alexandre Oliva <aoliva at gcc dot gnu.org> ---
for native builds, I mean.  hmm, I wonder if we can test for a native build in
config-lang.in...