sys-kernel: Eclassify

Package-Manager: portage-2.2.8-r1

1 files changed, 230 insertions, 0 deletions

diff --git a/eclass/linux-build.eclass b/eclass/linux-build.eclass
new file mode 100644
index 00000000..fcb9b889
--- /dev/null
+++ b/eclass/linux-build.eclass
@@ -0,0 +1,230 @@
+# Copyright 1999-2014 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: $
+
+# @ECLASS: linux-build.eclass
+# @MAINTAINER:
+# Bertrand Jacquin <beber@meleeweb.net>
+# @BLURB: Eclass for building kernel
+# @DESCRIPTION:
+# Build kernel properly
+
+case "${EAPI:-0}" in
+	5)
+		;;
+	*)	die "Unsupported EAPI=${EAPI} (unknown) for ${ECLASS}"
+		;;
+esac
+
+ETYPE="sources"
+
+inherit savedconfig kernel-2
+detect_version
+
+EXPORT_FUNCTIONS src_prepare src_compile src_install pkg_postinst
+
+SLOT="${PV%.*}"
+
+DESCRIPTION="Kernel stable sources and build"
+HOMEPAGE="http://www.kernel.org"
+SRC_URI="${KERNEL_URI} ${GENPATCHES_URI} ${ARCH_URI}"
+
+SRCDIR="${WORKDIR}/linux-${KV_FULL}"
+BUILDDIR="${WORKDIR}/build"
+
+KV_EXTRA="${EXTRAVERSION}"
+S="${SRCDIR}"
+
+IUSE="build source zlib lzma"
+REQUIRED_USE="
+	?? ( zlib lzma )
+	zlib? ( build )
+	lzma? ( build )
+	symlink? ( source )
+	"
+
+DEPEND="
+	sys-devel/bc
+	sys-apps/diffutils
+	|| (
+			sys-apps/kmod[zlib?,lzma?]
+			sys-apps/module-init-tools
+	   )"
+RDEPEND=""
+
+# @FUNCTION: _linux-build_configval
+# @INTERNAL
+# @DESCRIPTION:
+# Request a CONFIG value from .config file
+# Return true if set, and define CONFIG_<key>
+# Return false if not set
+_linux-build_configval() {
+	local _v="CONFIG_$1"
+
+	# Export only the needed config value
+	# when not already define
+	declare -p "${_v}" > /dev/null 2>&1 \
+		|| . <(sed -n "/^${_v}=/ p" "${BUILDDIR}/.config")
+
+	case "${!_v}" in
+		"") declare "$_v=n" ; export "${_v}" ; return 1 ;;
+		*)                    export "${_v}" ; return 0 ;;
+	esac
+}
+
+_linux-build_src_prepare_build() {
+	mkdir "${BUILDDIR}"
+
+	restore_config "${BUILDDIR}/.config"
+	if [[ ! -e "${BUILDDIR}/.config" ]] ; then
+		ewarn "Generate .config using 'defconfig'"
+		emake defconfig "${myopt[@]}"
+	fi
+
+	mkdir "${WORKDIR}/boot"
+
+	if _linux-build_configval CMDLINE_BOOL && _linux-build_configval CMDLINE ; then
+		einfo "Creating kernel.arg"
+		einfo "  CONFIG_CMDLINE='${CONFIG_CMDLINE}'"
+		echo "${CONFIG_CMDLINE}" > "${WORKDIR}/boot/kernel.arg"
+	fi
+
+	_linux-build_configval MODULES || ewarn "CONFIG_MODULES is not set"
+	_linux-build_configval UEVENT_HELPER_PATH \
+		&& ewarn "CONFIG_UEVENT_HELPER_PATH should be empty"
+
+	_linux-build_configval FHANDLE || ewarn "CONFIG_FHANDLE is needed for >=sys-fs/udev-210"
+	_linux-build_configval NET     || ewarn "CONFIG_NET is needed for >=sys-fs/udev-210"
+}
+
+linux-build_src_prepare() {
+	bopt=(
+		-C "${BUILDDIR}"
+		-f "${SRCDIR}/Makefile"
+		KBUILD_SRC="${SRCDIR}"
+		KCONFIG_CONFIG="${BUILDDIR}/.config"
+
+		KBUILD_BUILD_USER="${KBUILD_BUILD_USER:-$PORTAGE_USERNAME}"
+	)
+
+	copt=(
+		CC="$(tc-getCC)" HOSTCC="${CBUILD}-gcc" CROSS_COMPILE="${CHOST}-"
+		ARCH="$(tc-arch-kernel)" SUBARCH="$(tc-arch-kernel)"
+	)
+
+	vopt=(
+		EXTRAVERSION="${KV_EXTRA}"
+		LOCALVERSION= CONFIG_LOCALVERSION=
+		V=1
+	)
+
+	myopt=( "${bopt[@]}" "${copt[@]}" "${vopt[@]}" )
+
+	use build && _linux-build_src_prepare_build
+}
+
+_linux-build_src_compile_build() {
+	einfo "Checking configuration file"
+	emake oldconfig "${myopt[@]}" < /dev/null
+
+	if diff -Nu0 "${BUILDDIR}/.config.old" "${BUILDDIR}/.config" \
+		| egrep -q '^(\-|\+)CONFIG_' ; then
+		eerror "You configuration is not up to date"
+		diff -Nu "${BUILDDIR}/.config.old" "${BUILDDIR}/.config"
+		die "Bad configuration"
+	fi
+
+	einfo "Building kernel"
+	emake bzImage "${myopt[@]}"
+
+	if _linux-build_configval MODULES ; then
+		einfo "Building modules"
+		emake modules "${myopt[@]}"
+	fi
+}
+
+linux-build_src_compile() {
+	use build && _linux-build_src_compile_build
+}
+
+_linux-build_src_install_sources() {
+	kernel-2_src_install
+}
+
+_linux-build_src_install_build() {
+	einfo "Installing kernel"
+	emake install "${myopt[@]}" \
+		INSTALL_PATH="${WORKDIR}/boot"
+
+	insinto "/boot/${KV_FULL}"
+
+	newins "${WORKDIR}/boot/config-${KV_FULL}"     kernel.cfg
+	newins "${WORKDIR}/boot/vmlinuz-${KV_FULL}"    kernel.img
+	newins "${WORKDIR}/boot/System.map-${KV_FULL}" System.map
+
+	if _linux-build_configval CMDLINE_BOOL && _linux-build_configval CMDLINE ; then
+		doins "${WORKDIR}/boot/kernel.arg"
+	fi
+
+	if _linux-build_configval MODULES ; then
+		einfo "Installing modules"
+		emake modules_install "${myopt[@]}" \
+			INSTALL_MOD_PATH="${WORKDIR}" \
+			INSTALL_MOD_STRIP="${PORTAGE_STRIP_FLAGS}"
+
+		# kmod only support zlib and lzma
+		# See libkmod/libkmod-util.c / struct kmod_ext kmod_exts
+		if use zlib || use lzma ; then
+			local cmp ext
+
+			use zlib && { cmp="gzip -9c" ext="gz" ; }
+			use lzma && { cmp="xz -9c"   ext="xz" ; }
+
+			einfo "Compressing modules"
+			find "${WORKDIR}/lib/modules" \
+				-type f -name "*.ko" \
+				| while read ; do
+					${cmp} < "${REPLY}" > "${REPLY}.${ext}" \
+						|| die "${cmp} ${REPLY} failed"
+					rm "${REPLY}"
+				done
+		fi
+
+		einfo "Generating modules.dep"
+		depmod -ae -F "${BUILDDIR}/System.map" -b "${WORKDIR}" "${KV_FULL}" \
+			|| die "depmod failed"
+
+		rm "${WORKDIR}/lib/modules/${KV_FULL}/build"
+		rm "${WORKDIR}/lib/modules/${KV_FULL}/source"
+
+		insinto /lib
+		doins -r "${WORKDIR}/lib/modules"
+
+		# No need to make firmware_install, make modules_install does
+		if [[ -e "${WORKDIR}/lib/firmware" ]] ; then
+			einfo "Installing firmwares"
+
+			insinto /lib
+			doins -r "${WORKDIR}/lib/firmware"
+		fi
+	fi
+
+	use savedconfig && save_config "${BUILDDIR}/.config"
+}
+
+linux-build_src_install() {
+	use build  && _linux-build_src_install_build
+	use source && _linux-build_src_install_sources
+}
+
+linux-build_pkg_postinst() {
+	kernel-2_pkg_postinst
+
+	# Bypass kernel-2_pkg_postinst madness
+	if ! use symlink && [[ -L "${EROOT}usr/src/linux" ]] ; then
+		rm "${EROOT}usr/src/linux"
+	fi
+
+	einfo "You may need to:"
+	einfo "  make menuconfig ${copt[@]}"
+}