[Bug other/91879] --with-build-time-tools doesn't work as expected

[joseph at codesourcery dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91879

--- Comment #26 from joseph at codesourcery dot com <joseph at codesourcery dot 
com> ---
On Thu, 3 Oct 2019, stsp at users dot sourceforge.net wrote:

> Ah, I am starting to understand.
> So basically you mean something like this:
> --with-sysroot=$prefix/$target --with-build-sysroot=$DESTDIR$prefix/$target
> --with-prefix=/

It's --with-native-system-header-dir=/include not --with-prefix=/, but 
that's the idea.