[OE-core] [PATCH 3/3] kernel-devsrc: restructure for out of tree (and on target) module builds
Burton, Ross
ross.burton at intel.com
Wed Feb 28 16:38:07 UTC 2018
Sorry, but this breaks on ARM:
ERROR: kernel-devsrc-1.0-r0 do_install: Function failed: do_install (log
file is located at
/home/pokybuild/yocto-autobuilder/yocto-worker/nightly-arm/build/build/tmp/work/qemuarm-poky-linux-gnueabi/kernel-devsrc/1.0-r0/temp/log.do_install.25822)
ERROR: Logfile of failure stored in:
/home/pokybuild/yocto-autobuilder/yocto-worker/nightly-arm/build/build/tmp/work/qemuarm-poky-linux-gnueabi/kernel-devsrc/1.0-r0/temp/log.do_install.25822
Log data follows:
| DEBUG: Executing shell function do_install
| cp: with --parents, the destination must be a directory
| Try 'cp --help' for more information.
| WARNING:
/home/pokybuild/yocto-autobuilder/yocto-worker/nightly-arm/build/build/tmp/work/qemuarm-poky-linux-gnueabi/kernel-devsrc/1.0-r0/temp/run.do_install.25822:1
exit 1 from 'rm -rf $kerneldir/build/include'
| ERROR: Function failed: do_install (log file is located at
/home/pokybuild/yocto-autobuilder/yocto-worker/nightly-arm/build/build/tmp/work/qemuarm-poky-linux-gnueabi/kernel-devsrc/1.0-r0/temp/log.do_install.25822)
Ross
On 28 February 2018 at 02:06, Bruce Ashfield <bruce.ashfield at windriver.com>
wrote:
> The existing kernel-devsrc package starts with a full copy of the kernel
> source and then starts to strip out elements that are not required.
>
> This results in extra time (I/O) and extra space being taken up in the
> final package. The main purpose of the kernel-devsrc package has been to
> build modules against the running kernel, not to include a full copy of
> the source code for re-building the kernel. The end result was a
> 600M kernel-devsrc package.
>
> This restructuring of the package uses an approach similar to other
> distros, where the kernel-devsrc package is for building against the
> running kernel and uses a curated set of copied infrastructure, versus
> a mass copy of the entire kernel.
>
> The differences in this approach versus other is largely due to the
> architecture support and the split build/source directory of the
> kernel.
>
> The result is a kernel-devsrc package of about 10M, which is capable
> of running "make scripts" and compiling kernel modules against the
> running kernel.
>
> Along with the changes to the copying of the infrascture, we also
> have the following changes:
>
> - a better/more explicit listing of dependencies for on-target
> builds of "make scripts" or "make modules_prepare"
>
> - The kernel source is installed into /lib/modules/<version>/build
> and a symlink created from /usr/src/kernel to the new location.
> This aligns with the standard location for module support
> code
>
> - There is also a symlink from /lib/modules/<version>/source -> build
> to reserve a spot for a new package that is simply the kernel
> source. That package is not part of this update.
>
> [YOCTO #12535]
>
> Signed-off-by: Bruce Ashfield <bruce.ashfield at windriver.com>
> ---
> meta/recipes-kernel/linux/kernel-devsrc.bb | 178
> ++++++++++++++++++++++-------
> 1 file changed, 138 insertions(+), 40 deletions(-)
>
> diff --git a/meta/recipes-kernel/linux/kernel-devsrc.bb
> b/meta/recipes-kernel/linux/kernel-devsrc.bb
> index c1b5b7786d7c..f55b115e0936 100644
> --- a/meta/recipes-kernel/linux/kernel-devsrc.bb
> +++ b/meta/recipes-kernel/linux/kernel-devsrc.bb
> @@ -30,50 +30,148 @@ do_populate_sysroot[noexec] = "1"
> S = "${STAGING_KERNEL_DIR}"
> B = "${STAGING_KERNEL_BUILDDIR}"
>
> -KERNEL_VERSION = "${@get_kernelversion_headers('${S}')}"
> -
> PACKAGE_ARCH = "${MACHINE_ARCH}"
>
> +KERNEL_BUILD_ROOT="/lib/modules/"
> +
> do_install() {
> - kerneldir=${D}${KERNEL_SRC_PATH}
> - install -d $kerneldir
> -
> - #
> - # Copy the staging dir source (and module build support) into the
> devsrc structure.
> - # We can keep this copy simple and take everything, since a we'll
> clean up any build
> - # artifacts afterwards, and the extra i/o is not significant
> - #
> - cd ${B}
> - find . -type d -name '.git*' -prune -o -path '.debug' -prune -o
> -type f -print0 | cpio --null -pdlu $kerneldir
> - cd ${S}
> - find . -type d -name '.git*' -prune -o -type d -name
> '.kernel-meta' -prune -o -type f -print0 | cpio --null -pdlu $kerneldir
> -
> - # Explicitly set KBUILD_OUTPUT to ensure that the image directory
> is cleaned and not
> - # The main build artifacts. We clean the directory to avoid QA
> errors on mismatched
> - # architecture (since scripts and helpers are native format).
> - KBUILD_OUTPUT="$kerneldir"
> - oe_runmake -C $kerneldir CC="${KERNEL_CC}" LD="${KERNEL_LD}"
> clean _mrproper_scripts
> - # make clean generates an absolute path symlink called "source"
> - # in $kerneldir points to $kerneldir, which doesn't make any
> - # sense, so remove it.
> - if [ -L $kerneldir/source ]; then
> - bbnote "Removing $kerneldir/source symlink"
> - rm -f $kerneldir/source
> - fi
> -
> - # As of Linux kernel version 3.0.1, the clean target removes
> - # arch/powerpc/lib/crtsavres.o which is present in
> - # KBUILD_LDFLAGS_MODULE, making it required to build external
> modules.
> - if [ ${ARCH} = "powerpc" ]; then
> - mkdir -p $kerneldir/arch/powerpc/lib/
> - cp ${B}/arch/powerpc/lib/crtsavres.o
> $kerneldir/arch/powerpc/lib/crtsavres.o
> - fi
> -
> - chown -R root:root ${D}
> + kerneldir=${D}${KERNEL_BUILD_ROOT}${KERNEL_VERSION}
> + install -d $kerneldir
> +
> + # create the directory structure
> + rm -f $kerneldir/build
> + rm -f $kerneldir/source
> + mkdir -p $kerneldir/build
> +
> + # for compatibility with some older variants of this package, we
> + # create a /usr/src/kernel symlink to /lib/modules/<version>/source
> + mkdir -p ${D}/usr/src
> + (
> + cd ${D}/usr/src
> + ln -s ${KERNEL_BUILD_ROOT}${KERNEL_VERSION}/source kernel
> + )
> +
> + # for on target purposes, we unify build and source
> + (
> + cd $kerneldir
> + ln -s build source
> + )
> +
> + # first copy everything
> + (
> + cd ${S}
> + cp --parents $(find -type f -name "Makefile*" -o -name
> "Kconfig*") $kerneldir/build
> + )
> +
> + # then drop all but the needed Makefiles/Kconfig files
> + rm -rf $kerneldir/build/Documentation
> + rm -rf $kerneldir/build/scripts
> + rm -rf $kerneldir/build/include
> +
> + # now copy in parts from the build that we'll need later
> + (
> + cd ${B}
> +
> + cp Module.symvers $kerneldir/build
> + cp System.map* $kerneldir/build
> + if [ -s Module.markers ]; then
> + cp Module.markers $kerneldir/build
> + fi
> +
> + cp .config $kerneldir/build
> +
> + # TODO: this scripts copy will likely blow up QA, so for now, we
> + # require a more complex 'make scripts' to restore these,
> versus
> + # copying them here. Left as a reference to indicate that we
> + # know the scripts must be dealt with.
> + # cp -a scripts $kerneldir/build
> +
> + if [ -f tools/objtool/objtool ]; then
> + cp -a tools/objtool/objtool $kerneldir/build/tools/objtool/
> + fi
> + if [ -d arch/${ARCH}/scripts ]; then
> + cp -a arch/${ARCH}/scripts $kerneldir/build/arch/${ARCH}
> + fi
> + if [ -f arch/${ARCH}/*lds ]; then
> + cp -a arch/${ARCH}/*lds $kerneldir/build/arch/${ARCH}
> + fi
> +
> + rm -f $kerneldir/build/scripts/*.o
> + rm -f $kerneldir/build/scripts/*/*.o
> +
> + if [ "${ARCH}" = "powerpc" ]; then
> + cp -a --parents arch/powerpc/lib/crtsavres.[So]
> $kerneldir/build/
> + fi
> +
> + cp -a include $kerneldir/build/include
> + )
> +
> + # now grab the chunks from the source tree that we need
> + (
> + cd ${S}
> +
> + cp -a scripts $kerneldir/build
> + if [ "${ARCH}" = "arm64" ]; then
> + # arch/arm64/include/asm/xen references arch/arm
> + cp -a --parents arch/arm/include/asm/xen $kerneldir/build/
> + # arch/arm64/include/asm/opcodes.h references arch/arm
> + cp -a --parents arch/arm/include/asm/opcodes.h
> $kerneldir/build/
> + fi
> +
> + # include the machine specific headers for ARM variants, if
> available.
> + if [ "${ARCH}" = "arm" ]; then
> + cp -a --parents arch/${ARCH}/mach-*/include $kerneldir/build/
> +
> + # include a few files for 'make prepare'
> + cp -a --parents arch/arm/tools/gen-mach-types
> $RPM_BUILD_ROOT/lib/modules/$KernelVer/build/
> + cp -a --parents arch/arm/tools/mach-types
> $RPM_BUILD_ROOT/lib/modules/$KernelVer/build/
> + fi
> +
> + if [ -d arch/${ARCH}/include ]; then
> + cp -a --parents arch/${ARCH}/include $kerneldir/build/
> + fi
> +
> + cp -a include $kerneldir/build
> +
> + if [ "${ARCH}" = "x86" ]; then
> + # files for 'make prepare' to succeed with kernel-devel
> + cp -a --parents arch/x86/entry/syscalls/syscall_32.tbl
> $kerneldir/build/
> + cp -a --parents arch/x86/entry/syscalls/syscalltbl.sh
> $kerneldir/build/
> + cp -a --parents arch/x86/entry/syscalls/syscallhdr.sh
> $kerneldir/build/
> + cp -a --parents arch/x86/entry/syscalls/syscall_64.tbl
> $kerneldir/build/
> + cp -a --parents arch/x86/tools/relocs_32.c $kerneldir/build/
> + cp -a --parents arch/x86/tools/relocs_64.c $kerneldir/build/
> + cp -a --parents arch/x86/tools/relocs.c $kerneldir/build/
> + cp -a --parents arch/x86/tools/relocs_common.c
> $kerneldir/build/
> + cp -a --parents arch/x86/tools/relocs.h $kerneldir/build/
> + cp -a --parents tools/include/tools/le_byteshift.h
> $kerneldir/build/
> + cp -a --parents tools/include/tools/be_byteshift.h
> $kerneldir/build/
> + cp -a --parents arch/x86/purgatory/purgatory.c
> $kerneldir/build/
> + cp -a --parents arch/x86/purgatory/sha256.h $kerneldir/build/
> + cp -a --parents arch/x86/purgatory/sha256.c $kerneldir/build/
> + cp -a --parents arch/x86/purgatory/stack.S $kerneldir/build/
> + cp -a --parents arch/x86/purgatory/string.c $kerneldir/build/
> + cp -a --parents arch/x86/purgatory/setup-x86_64.S
> $kerneldir/build/
> + cp -a --parents arch/x86/purgatory/entry64.S $kerneldir/build/
> + cp -a --parents arch/x86/boot/string.h $kerneldir/build/
> + cp -a --parents arch/x86/boot/string.c $kerneldir/build/
> + cp -a --parents arch/x86/boot/ctype.h $kerneldir/build/
> + fi
> + )
> +
> + # Make sure the Makefile and version.h have a matching timestamp so
> that
> + # external modules can be built
> + touch -r $kerneldir/build/Makefile $kerneldir/build/include/
> generated/uapi/linux/version.h
> +
> + # Copy .config to include/config/auto.conf so "make prepare" is
> unnecessary.
> + cp $kerneldir/build/.config $kerneldir/build/include/config/auto.conf
> +
> + chown -R root:root ${D}
> }
> +
> # Ensure we don't race against "make scripts" during cpio
> do_install[lockfiles] = "${TMPDIR}/kernel-scripts.lock"
>
> -PACKAGES = "kernel-devsrc"
> -FILES_${PN} = "${KERNEL_SRC_PATH}"
> -RDEPENDS_${PN} = "bc"
> +FILES_${PN} = "${KERNEL_BUILD_ROOT} ${KERNEL_SRC_PATH}"
> +FILES_${PN}-dbg += "${KERNEL_BUILD_ROOT}*/build/scripts/*/.debug/*"
> +RDEPENDS_${PN} = "bc glibc-utils"
> --
> 2.5.0
>
>
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