Hi,
I've been talking about unifying rumprun-xen and rumprun-baremetal for a
while. I didn't really know what we should do with rumprun-posix before
Justin's promising frankenlibc work started. Now it looks like all
three will fit under a single roof. This email opens discussion.
The motivation for unification is clear: it's tiring to edit three
different copies of the same code in three different places with
slightly different featuresets. This has become especially clear very
recently as we've been working with Martin towards supporting a wide
range of "userland" features, e.g. TLS, C++ and constructors.
Some of you might have noticed me doodling with the common bits in
buildrump/bmk-common. I've now created a repository rumprun where the
common bits are supposed to land instead of buildrump.sh, where they
don't really belong. The original intent was to submodule the rumprun
repo from the -xen, -baremetal and -posix repositories. However, as
experience with bmk-common showed, it's fairly annoying in practise to
commit all over the places and be constantly updating submodules. So,
why go there if we don't have to.
I propose that we import all code from both -xen and -baremetal (*)
directly into the rumprun repository, and deprecate the specific repos.
Then we start making the common bits actually common bits.
*) -posix will be discussed in a separate mail which I'm not sending tonight
So, it would look something like the following in the beginning:
rumprun/
build-baremetal.sh
build-xen.sh
app-tools/
...
libunwind/
...
rumpsrc/
[as a submodule]
buildrump.sh/
[as a submodule]
xen/
...
baremetal/
...
That way we get the common unified bits without the hassle of submodule
updates. It will also make it very easy to automatically test all
platforms with a commit trigger.
thoughts?
- antti
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