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# Copyright 2019 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
EAPI=7
inherit mount-boot savedconfig toolchain-funcs
MY_P=linux-${PV}
CONFIG_VER=5.4.1.arch1-1
CONFIG_HASH=d6bbb261bd2c8f83b9c93041dae9aa4175e20e6e
DESCRIPTION="Linux kernel built from vanilla upstream sources"
HOMEPAGE="https://www.kernel.org/"
SRC_URI="https://cdn.kernel.org/pub/linux/kernel/v5.x/${MY_P}.tar.xz
https://git.archlinux.org/svntogit/packages.git/plain/trunk/config?h=packages/linux&id=${CONFIG_HASH}
-> linux-${CONFIG_VER}.config"
S=${WORKDIR}/${MY_P}
LICENSE="GPL-2"
SLOT="${PV}"
KEYWORDS="~amd64"
IUSE="+initramfs"
# install-DEPEND actually
# note: we need installkernel with initramfs support!
RDEPEND="
|| (
sys-kernel/installkernel-gentoo
sys-kernel/installkernel-systemd-boot
)
initramfs? ( sys-kernel/dracut )"
pkg_pretend() {
mount-boot_pkg_pretend
ewarn "This is an experimental package. The built kernel and/or initramfs"
ewarn "may not work at all or fail with your bootloader configuration. Please"
ewarn "make sure to keep a backup kernel available before testing it."
}
src_configure() {
# force ld.bfd if we can find it easily
local LD="$(tc-getLD)"
if type -P "${LD}.bfd" &>/dev/null; then
LD+=.bfd
fi
MAKEARGS=(
V=1
HOSTCC="$(tc-getCC)"
HOSTCXX="$(tc-getCXX)"
HOSTCFLAGS="${CFLAGS}"
HOSTLDFLAGS="${LDFLAGS}"
AS="$(tc-getAS)"
CC="$(tc-getCC)"
LD="${LD}"
AR="$(tc-getAR)"
NM="$(tc-getNM)"
STRIP=":"
OBJCOPY="$(tc-getOBJCOPY)"
OBJDUMP="$(tc-getOBJDUMP)"
# we need to pass it to override colliding Gentoo envvar
ARCH=x86
)
cp "${DISTDIR}"/linux-${CONFIG_VER}.config .config || die
# while Arch config is cool, we don't want gcc plugins as they
# break distcc
sed -i -e '/GCC_PLUGIN/d' .config || die
# module compression prevents us from stripping them post-inst
sed -i -e '/MODULE_COMPRESS/d' .config || die
# shove our theft under the carpet!
sed -i -e '/HOSTNAME/s:archlinux:gentoo:' .config || die
restore_config .config
mkdir -p "${WORKDIR}"/modprep || die
mv .config "${WORKDIR}"/modprep/ || die
emake O="${WORKDIR}"/modprep "${MAKEARGS[@]}" olddefconfig
emake O="${WORKDIR}"/modprep "${MAKEARGS[@]}" modules_prepare
cp -pR "${WORKDIR}"/modprep "${WORKDIR}"/build || die
}
src_compile() {
emake O="${WORKDIR}"/build "${MAKEARGS[@]}" all
}
src_test() {
:
}
src_install() {
# do not use 'make install' as it behaves differently based
# on what kind of installkernel is installed
emake O="${WORKDIR}"/build "${MAKEARGS[@]}" \
INSTALL_MOD_PATH="${ED}" modules_install
# install headers and prepared objects on top of them
# note: we're using mv rather than doins to save space and time
find -name '*.c' -delete || die
rm -r Documentation || die
dodir /usr/src
cd "${WORKDIR}" || die
mv "${S}" "${ED}"/usr/src/ || die
# strip out-of-source build stuffs from modprep
find modprep -type f '(' \
-name Makefile -o \
-name '*.[ao]' -o \
'(' -name '.*' -a -not -name '.config' ')' \
')' -delete || die
rm modprep/source || die
cp -pR modprep/. "${ED}/usr/src/linux-${PV}"/ || die
# install the kernel and files needed for module builds
cp build/{arch/x86/boot/bzImage,System.map,Module.symvers} \
"${ED}/usr/src/linux-${PV}"/ || die
# fix source tree and build dir symlinks
dosym ../../../usr/src/linux-${PV} /lib/modules/${PV}/build
dosym ../../../usr/src/linux-${PV} /lib/modules/${PV}/source
save_config build/.config
}
pkg_preinst() {
:
}
pkg_postinst() {
if [[ -z ${ROOT} ]]; then
mount-boot_pkg_preinst
local fail=
if use initramfs; then
ebegin "Building initramfs via dracut"
# putting it alongside kernel image as 'initrd' makes
# kernel-install happier
dracut --force "${EROOT}/usr/src/linux-${PV}/initrd" "${PV}"
eend || die "Building initramfs failed"
fi
ebegin "Installing the kernel via installkernel"
# note: .config is taken relatively to System.map;
# initrd relatively to bzImage
installkernel "${PV}" \
"${EROOT}/usr/src/linux-${PV}/bzImage" \
"${EROOT}/usr/src/linux-${PV}/System.map"
eend || fail=1
[[ ${fail} ]] && die "Installing the kernel failed"
# TODO: update /usr/src/linux symlink?
fi
savedconfig_pkg_postinst
}
pkg_prerm() {
:
}
pkg_postrm() {
rm -f "${EROOT}/usr/src/linux-${PV}/initrd" &&
rmdir --ignore-fail-on-non-empty "${EROOT}/usr/src/linux-${PV}"
}
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