Mirror of git.yoctoproject.org/poky https://git.enea.com/cgit/linux/poky.git/atom?h=dizzy 2014-09-23T19:31:18+00:00 2014-09-23T19:31:18+00:00 Richard Purdie richard.purdie@linuxfoundation.org 2014-08-28T10:10:06+00:00 urn:sha1:2cbab459e471abbddba8badc64805e7226e864be These patches are the start of a new idea, a way of allowing a single set of cross/native sstate to work over mutliple distros, even old ones. The assumption is that our own C library is basically up to date. We build and share a small tarball (~2MB) of a prebuilt copy of this along with a patchelf binary (which sadly is C++ based so libstdc++ is in there). This tarball can be generated from our usual SDK generation process through the supplied recipe, uninative-tarball. At the start of the build, if its not been extracted into the sysroot, this tarball is extracted there and configured for the specified path. When we install binaries from a "uninative" sstate feed, we change the dynamic loader to point at this dynamic loader and C librbary. This works exactly the same way as our relocatable SDK does. The only real difference is a switch to use patchelf, so even if the interpreter section is too small, it can still adjust the binary. Right now this implements a working proof of concept. If you build the tarball and place it at the head of the tree (in COREBASE), you can run a build from sstate and successfully build packages and construct images. There is some improvement needed, its hardcoded for x86_64 right now, its trivial to add 32 bit support too. The tarball isn't fetched right now, there is just a harcoded path assumption and there is no error handling. I haven't figured out the best delivery mechanism for that yet. BuildStarted is probably not the right event to hook on either. I've merged this to illustrate how with a small change, we might make the native/cross sstate much more reusable and hence improve the accessibility of lower overhead builds. With this change, its possible the Yocto Project may be able to support a configured sstate mirror out the box. This also has positive implications for our developer workflow/SDK improvements. (From OE-Core rev: e66c96ae9c7ba21ebd04a4807390f0031238a85a) Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>