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. (From OE-Core rev: e66c96ae9c7ba21ebd04a4807390f0031238a85a) Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
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NATIVELSBSTRING = "universal"
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UNINATIVE_LOADER = "${STAGING_DIR_NATIVE}/lib/ld-linux-x86-64.so.2"
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addhandler uninative_eventhandler
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uninative_eventhandler[eventmask] = "bb.event.BuildStarted"
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python uninative_eventhandler() {
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loader = e.data.getVar("UNINATIVE_LOADER", True)
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if not os.path.exists(loader):
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import subprocess
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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")
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#bb.warn("nativesdk lib extraction: " + cmd)
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subprocess.check_call(cmd, shell=True)
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}
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SSTATEPOSTUNPACKFUNCS_append = " uninative_changeinterp"
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python uninative_changeinterp () {
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import subprocess
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import stat
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import oe.qa
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if not (bb.data.inherits_class('native', d) or bb.data.inherits_class('crosssdk', d) or bb.data.inherits_class('cross', d)):
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return
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sstateinst = d.getVar('SSTATE_INSTDIR', True)
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for walkroot, dirs, files in os.walk(sstateinst):
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for file in files:
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f = os.path.join(walkroot, file)
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if os.path.islink(f):
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continue
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s = os.stat(f)
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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)):
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continue
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elf = oe.qa.ELFFile(f)
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try:
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elf.open()
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except:
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continue
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#bb.warn("patchelf-uninative --set-interpreter %s %s" % (d.getVar("UNINATIVE_LOADER", True), f))
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subprocess.call("patchelf-uninative --set-interpreter %s %s" % (d.getVar("UNINATIVE_LOADER", True), f), shell=True)
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}
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SUMMARY = "libc and patchelf tarball for use with uninative.bbclass"
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LICENSE = "MIT"
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LIC_FILES_CHKSUM = "file://${COREBASE}/LICENSE;md5=4d92cd373abda3937c2bc47fbc49d690 \
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file://${COREBASE}/meta/COPYING.MIT;md5=3da9cfbcb788c80a0384361b4de20420"
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TOOLCHAIN_TARGET_TASK = ""
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TOOLCHAIN_HOST_TASK = "\
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nativesdk-eglibc \
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nativesdk-patchelf \
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"
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INHIBIT_DEFAULT_DEPS = "1"
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DEPENDS += "patchelf-native"
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TOOLCHAIN_OUTPUTNAME ?= "${BUILD_ARCH}-nativesdk-libc"
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RDEPENDS = "${TOOLCHAIN_HOST_TASK}"
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EXCLUDE_FROM_WORLD = "1"
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inherit meta
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inherit populate_sdk
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deltask install
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deltask package
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SDK_PACKAGING_FUNC = ""
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fakeroot create_sdk_files() {
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cp ${COREBASE}/scripts/relocate_sdk.py ${SDK_OUTPUT}/${SDKPATH}/
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# Replace the ##DEFAULT_INSTALL_DIR## with the correct pattern.
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# Escape special characters like '+' and '.' in the SDKPATH
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escaped_sdkpath=$(echo ${SDKPATH}/sysroots/${SDK_SYS} |sed -e "s:[\+\.]:\\\\\\\\\0:g")
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sed -i -e "s:##DEFAULT_INSTALL_DIR##:$escaped_sdkpath:" ${SDK_OUTPUT}/${SDKPATH}/relocate_sdk.py
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}
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fakeroot tar_sdk() {
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mkdir -p ${SDK_DEPLOY}
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cd ${SDK_OUTPUT}/${SDKPATH}
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mv sysroots/${SDK_SYS} ./${BUILD_SYS}
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rm sysroots -rf
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patchelf --set-interpreter ${@''.join('a' for n in xrange(1024))} ./${BUILD_SYS}/usr/bin/patchelf
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mv ./${BUILD_SYS}/usr/bin/patchelf ./${BUILD_SYS}/usr/bin/patchelf-uninative
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tar ${SDKTAROPTS} -c --file=${SDK_DEPLOY}/${TOOLCHAIN_OUTPUTNAME}.tar.bz2 .
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}
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