# Copyright 1999-2010 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/app-emulation/qemu-kvm/qemu-kvm-0.12.5-r1.ebuild,v 1.5 2010/09/06 10:56:40 jmbsvicetto Exp $

BACKPORTS=1

EAPI="2"

if [[ ${PV} = *9999* ]]; then
	EGIT_REPO_URI="git://git.kernel.org/pub/scm/virt/kvm/qemu-kvm.git"
	GIT_ECLASS="git"
fi

inherit eutils flag-o-matic ${GIT_ECLASS} linux-info toolchain-funcs

if [[ ${PV} = *9999* ]]; then
	SRC_URI=""
	KEYWORDS=""
else
	SRC_URI="mirror://sourceforge/kvm/${PN}/${P}.tar.gz
		${BACKPORTS:+mirror://gentoo/${P}-backports-${BACKPORTS}.tar.bz2}"
	KEYWORDS="~amd64 ~ppc ~ppc64 ~x86"
fi

DESCRIPTION="QEMU + Kernel-based Virtual Machine userland tools"
HOMEPAGE="http://www.linux-kvm.org"

LICENSE="GPL-2"
SLOT="0"
# xen is disabled until the deps are fixed
IUSE="+aio alsa bluetooth brltty curl esd fdt hardened kvm-trace \
ncurses pulseaudio qemu-ifup sasl sdl ssl static vde"

COMMON_TARGETS="i386 x86_64 arm cris m68k microblaze mips mipsel ppc ppc64 sh4 sh4eb sparc sparc64"
IUSE_SOFTMMU_TARGETS="${COMMON_TARGETS} mips64 mips64el ppcemb"
IUSE_USER_TARGETS="${COMMON_TARGETS} alpha armeb ppc64abi32 sparc32plus"

for target in ${IUSE_SOFTMMU_TARGETS}; do
	IUSE="${IUSE} +qemu_softmmu_targets_${target}"
done

for target in ${IUSE_USER_TARGETS}; do
	IUSE="${IUSE} +qemu_user_targets_${target}"
done

RESTRICT="test"

RDEPEND="
	!app-emulation/kqemu
	!app-emulation/qemu
	!app-emulation/qemu-softmmu
	!app-emulation/qemu-user
	!app-emulation/qemu-kvm-spice
	sys-apps/pciutils
	>=sys-apps/util-linux-2.16.0
	sys-libs/zlib
	aio? ( dev-libs/libaio )
	alsa? ( >=media-libs/alsa-lib-1.0.13 )
	bluetooth? ( net-wireless/bluez )
	brltty? ( app-accessibility/brltty )
	curl? ( net-misc/curl )
	esd? ( media-sound/esound )
	fdt? ( sys-apps/dtc )
	ncurses? ( sys-libs/ncurses )
	pulseaudio? ( media-sound/pulseaudio )
	qemu-ifup? ( sys-apps/iproute2 net-misc/bridge-utils )
	sasl? ( dev-libs/cyrus-sasl )
	sdl? ( >=media-libs/libsdl-1.2.11[X] )
	ssl? ( net-libs/gnutls )
	vde? ( net-misc/vde )
"

DEPEND="${RDEPEND}
	app-text/texi2html
	>=sys-kernel/linux-headers-2.6.29
	ssl? ( dev-util/pkgconfig )
"

kvm_kern_warn() {
	eerror "Please enable KVM support in your kernel, found at:"
	eerror
	eerror "  Virtualization"
	eerror "    Kernel-based Virtual Machine (KVM) support"
	eerror
}

pkg_setup() {

	local counter="0" check
	use qemu_softmmu_targets_x86_64 || ewarn "You disabled default target QEMU_SOFTMMU_TARGETS=x86_64"
	for check in ${IUSE_SOFTMMU_TARGETS} ; do
		use "qemu_softmmu_targets_${check}" && counter="1"
	done
	[[ ${counter} == 0 ]] && die "You need to set at least 1 target in QEMU_SOFTMMU_TARGETS"

	if kernel_is lt 2 6 25; then
		eerror "This version of KVM requres a host kernel of 2.6.25 or higher."
		eerror "Either upgrade your kernel"
	else
		if ! linux_config_exists; then
			eerror "Unable to check your kernel for KVM support"
			kvm_kern_warn
		elif ! linux_chkconfig_present KVM; then
			kvm_kern_warn
		fi
	fi

	enewgroup kvm
}

src_prepare() {
	# prevent docs to get automatically installed
	sed -i '/$(DESTDIR)$(docdir)/d' Makefile || die
	# Alter target makefiles to accept CFLAGS set via flag-o
	sed -i 's/^\(C\|OP_C\|HELPER_C\)FLAGS=/\1FLAGS+=/' \
		Makefile Makefile.target || die
	# append CFLAGS while linking
	sed -i 's/$(LDFLAGS)/$(QEMU_CFLAGS) $(CFLAGS) $(LDFLAGS)/' rules.mak || die

	# remove part to make udev happy
	sed -e 's~NAME="%k", ~~' -i kvm/scripts/65-kvm.rules || die

	epatch "${FILESDIR}"/qemu-0.11.0-mips64-user-fix.patch \
		"${FILESDIR}"/${PN}-0.12.3-fix-crash-with-sdl.patch \
		"${FILESDIR}"/${PN}-0.12.3-include-madvise-defines.patch

	[[ -n ${BACKPORTS} ]] && \
		EPATCH_FORCE=yes EPATCH_SUFFIX="patch" EPATCH_SOURCE="${S}/patches" \
			epatch
}

src_configure() {
	local conf_opts audio_opts softmmu_targets user_targets

	for target in ${IUSE_SOFTMMU_TARGETS} ; do
		use "qemu_softmmu_targets_${target}" && \
		softmmu_targets="${softmmu_targets} ${target}-softmmu"
	done

	for target in ${IUSE_USER_TARGETS} ; do
		use "qemu_user_targets_${target}" && \
		user_targets="${user_targets} ${target}-linux-user"
	done

	if [ ! -z "${softmmu_targets}" ]; then
		einfo "Building the following softmmu targets: ${softmmu_targets}"
	fi

	if [ ! -z "${user_targets}" ]; then
		einfo "Building the following user targets: ${user_targets}"
		conf_opts="${conf_opts} --enable-linux-user"
	else
		conf_opts="${conf_opts} --disable-linux-user"
	fi

	# Fix QA issues. QEMU needs executable heaps and we need to mark it as such
	conf_opts="${conf_opts} --extra-ldflags=-Wl,-z,execheap"

	# Add support for static builds
	use static && conf_opts="${conf_opts} --static"

	#config options
	conf_opts="${conf_opts} $(use_enable aio linux-aio)"
	conf_opts="${conf_opts} $(use_enable bluetooth bluez)"
	conf_opts="${conf_opts} $(use_enable brltty brlapi)"
	conf_opts="${conf_opts} $(use_enable curl)"
	conf_opts="${conf_opts} $(use_enable fdt)"
	conf_opts="${conf_opts} $(use_enable hardened user-pie)"
	use kvm-trace && conf_opts="${conf_opts} --with-kvm-trace"
	conf_opts="${conf_opts} $(use_enable ncurses curses)"
	conf_opts="${conf_opts} $(use_enable sasl vnc-sasl)"
	conf_opts="${conf_opts} $(use_enable sdl)"
	conf_opts="${conf_opts} $(use_enable ssl vnc-tls)"
	conf_opts="${conf_opts} $(use_enable vde)"
#	conf_opts="${conf_opts} $(use_enable xen)"
	conf_opts="${conf_opts} --disable-xen"
	conf_opts="${conf_opts} --disable-darwin-user --disable-bsd-user"

	# audio options
	audio_opts="oss"
	use alsa && audio_opts="alsa ${audio_opts}"
	use esd && audio_opts="esd ${audio_opts}"
	use pulseaudio && audio_opts="pa ${audio_opts}"
	use sdl && audio_opts="sdl ${audio_opts}"
	./configure --prefix=/usr \
		--disable-strip \
		--enable-kvm \
		--enable-nptl \
		--enable-uuid \
		${conf_opts} \
		--audio-drv-list="${audio_opts}" \
		--target-list="${softmmu_targets} ${user_targets}" \
		--cc="$(tc-getCC)" \
		--host-cc="$(tc-getBUILD_CC)" \
		|| die "configure failed"

		# this is for qemu upstream's threaded support which is
		# in development and broken
		# the kvm project has its own support for threaded IO
		# which is always on and works
#		--enable-io-thread \
}

src_install() {
	emake DESTDIR="${D}" install || die "make install failed"

	insinto /etc/udev/rules.d/
	doins kvm/scripts/65-kvm.rules || die

	if use qemu-ifup; then
		insinto /etc/qemu/
		insopts -m0755
		doins kvm/scripts/qemu-ifup || die
	fi

	dodoc Changelog MAINTAINERS TODO pci-ids.txt || die
	newdoc pc-bios/README README.pc-bios || die
	dohtml qemu-doc.html qemu-tech.html || die

	if use qemu_softmmu_targets_x86_64 ; then
		dobin "${FILESDIR}"/qemu-kvm
		dosym /usr/bin/qemu-kvm /usr/bin/kvm
	else
		elog "You disabled QEMU_SOFTMMU_TARGETS=x86_64, this disables install"
		elog "of /usr/bin/qemu-kvm and /usr/bin/kvm"
	fi
}

pkg_postinst() {
	elog "If you don't have kvm compiled into the kernel, make sure you have"
	elog "the kernel module loaded before running kvm. The easiest way to"
	elog "ensure that the kernel module is loaded is to load it on boot."
	elog "For AMD CPUs the module is called 'kvm-amd'"
	elog "For Intel CPUs the module is called 'kvm-intel'"
	elog "Please review /etc/conf.d/modules for how to load these"
	elog
	elog "Make sure your user is in the 'kvm' group"
	elog "Just run 'gpasswd -a <USER> kvm', then have <USER> re-login."
	elog
	elog "You will need the Universal TUN/TAP driver compiled into your"
	elog "kernel or loaded as a module to use the virtual network device"
	elog "if using -net tap.  You will also need support for 802.1d"
	elog "Ethernet Bridging and a configured bridge if using the provided"
	elog "kvm-ifup script from /etc/kvm."
	elog
	elog "The gnutls use flag was renamed to ssl, so adjust your use flags."
	echo
}