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author | Richard Purdie <richard.purdie@linuxfoundation.org> | 2014-08-28 10:10:06 +0000 |
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committer | Richard Purdie <richard.purdie@linuxfoundation.org> | 2014-09-23 20:31:06 +0100 |
commit | e66c96ae9c7ba21ebd04a4807390f0031238a85a (patch) | |
tree | d41052eddefa93433a991b084e3e36083aca14cb /meta/classes/uninative.bbclass | |
parent | d5e2a59ab59e3d67d09c5f25b8623186af855e17 (diff) | |
download | openembedded-core-contrib-e66c96ae9c7ba21ebd04a4807390f0031238a85a.tar.gz |
uninative: Add uninative - a way of reusing native/cross over multiple distros
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.
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'meta/classes/uninative.bbclass')
-rw-r--r-- | meta/classes/uninative.bbclass | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/meta/classes/uninative.bbclass b/meta/classes/uninative.bbclass new file mode 100644 index 00000000000..51391dbc4a8 --- /dev/null +++ b/meta/classes/uninative.bbclass @@ -0,0 +1,44 @@ +NATIVELSBSTRING = "universal" + +UNINATIVE_LOADER = "${STAGING_DIR_NATIVE}/lib/ld-linux-x86-64.so.2" + +addhandler uninative_eventhandler +uninative_eventhandler[eventmask] = "bb.event.BuildStarted" + +python uninative_eventhandler() { + loader = e.data.getVar("UNINATIVE_LOADER", True) + if not os.path.exists(loader): + import subprocess + cmd = e.data.expand("mkdir -p ${STAGING_DIR}; cd ${STAGING_DIR}; tar -xjf ${COREBASE}/${BUILD_ARCH}-nativesdk-libc.tar.bz2; ${STAGING_DIR}/relocate_sdk.py ${STAGING_DIR_NATIVE} ${UNINATIVE_LOADER} ${UNINATIVE_LOADER} ${STAGING_BINDIR_NATIVE}/patchelf-uninative") + #bb.warn("nativesdk lib extraction: " + cmd) + subprocess.check_call(cmd, shell=True) +} + +SSTATEPOSTUNPACKFUNCS_append = " uninative_changeinterp" + +python uninative_changeinterp () { + import subprocess + import stat + import oe.qa + + if not (bb.data.inherits_class('native', d) or bb.data.inherits_class('crosssdk', d) or bb.data.inherits_class('cross', d)): + return + + sstateinst = d.getVar('SSTATE_INSTDIR', True) + for walkroot, dirs, files in os.walk(sstateinst): + for file in files: + f = os.path.join(walkroot, file) + if os.path.islink(f): + continue + s = os.stat(f) + if not ((s[stat.ST_MODE] & stat.S_IXUSR) or (s[stat.ST_MODE] & stat.S_IXGRP) or (s[stat.ST_MODE] & stat.S_IXOTH)): + continue + elf = oe.qa.ELFFile(f) + try: + elf.open() + except: + continue + + #bb.warn("patchelf-uninative --set-interpreter %s %s" % (d.getVar("UNINATIVE_LOADER", True), f)) + subprocess.call("patchelf-uninative --set-interpreter %s %s" % (d.getVar("UNINATIVE_LOADER", True), f), shell=True) +} |