Cross compile FreeBSD on amd64 for arm64 failes via compile determination error

[Rodney W. Grimes]

> > On 6 Jun 2020, at 00:25, Ian Lepore <ian at FreeBSD.org> wrote:
> > 
> > You cannot do that.  The installworld process uses a path that points
> > into the obj tree that got built (so that new binaries are used to do
> > the install work), and those binaries are compiled for the arch that
> > did the build.
> 
> That is my experience.
> 
> I used to work around a closely related problem when I built build* on
> a fast machine, and did the install* on the slow ones. As I was using
> automounts, I ended up with incompatible paths baked into the build,
> so I worked around those with symlinks.
> 
> I never tried this with anything other than i386/i386 or amd64/amd64,
> so the above is interesting. Could a viable cross-build* be "fixed" by
> symlinks, and somehow and easily forcing a cross-build of the bootstrap
> tools?

Thats an interesting idea, or a form of a special "populatebuildtools"
target that says to populate the obj/ tools area from the binaries
on the running system, as often those are adaquate for an installworld
to complete.  Or possibly a simple "usehosttools" to say don't even
try to use the tools from obj/ just use the tools on the running system.

> My RPis wish to know :-)

My diskless boot and build system wants to know too. :-)

> M
> --
> 

-- 
Rod Grimes                                                 rgrimes at freebsd.org