Hi, > Ada currently does not have built-in support for multilibs (there's a related > PR I believe). #5911 I suppose.
> Instead, it has another (similar but different) mechanism via the --RTS > make/compile/bind switch, which require manual build/install of several > gnatlib via calls to make -C gcc gnatlib with appropriate options. > > For instance to build a 64 bit run time with a 32 bits Solaris compiler: > > make -C gcc THREAD_KIND=m64 GNATLIBCFLAGS="-O2 -m64" gnatlib I've taken adalib and adainclude from a 31bit installation copied in the same dir as the 64bit versions under 32/. Compiling my example with --RTS=32 does the trick. Although this is not a final solution it is a good workaround - thanks. With a bit additional script hackery I hope to be able to bootstrap a 31bit gcc including ada support on a 64bit system. > Connecting this capability with the multilib mechanism would be nice although > nobody has done it so far (for either lack of interest or lack of knowledge > of the gcc makefiles), and there are non trivial issues since there are some > run-times that are supported by the Ada compiler (e.g. pthread run-time > on Solaris, the gnatlib-sjlj and gnatlib-zcx targets) that have no > corresponding multilib configuration, and vice-versa. > > Combining all the possibilities would simply create an explosion of run-time, > which is also not desirable. I believe you that this is not an easy job. Maybe it is eased a bit by the recent toplevel bootstrap changes?! Bye, -Andreas-
