# Copyright 1999-2011 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

EAPI="2"

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

SRC_URI="http://wiki.qemu.org/download/${P}.tar.gz"
KEYWORDS="~amd64 x86 ~arm ~alpha ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc ~sparc-fbsd ~x86-fbsd ~x86-interix ~amd64-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos ~m68k-mint ~sparc-solaris ~sparc64-solaris ~x86-solaris"

DESCRIPTION="QEMU emulator and ABI wrapper"
HOMEPAGE="http://www.qemu.org"

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

COMMON_TARGETS="i386 x86_64 arm cris m68k microblaze microblazeel \
mips mipsel ppc ppc64 sh4 sh4eb sparc sparc64 s390x"
IUSE_SOFTMMU_TARGETS="${COMMON_TARGETS} lm32 mips64 mips64el ppcemb"
IUSE_USER_TARGETS="${COMMON_TARGETS} alpha armeb ppc64abi32 sparc32plus unicore32"

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/qemu-kvm
	!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-1.2.0 )
	jpeg? ( virtual/jpeg )
	ncurses? ( sys-libs/ncurses )
	png? ( media-libs/libpng )
	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 )
"

pkg_setup() {
	if use \
		qemu_softmmu_targets_i386 \
		qemu_softmmu_targets_x86_64 \
		qemu_softmmu_targets_sparc64
	then
		ewarn "Please ensure you have more than 2 GiB RAM or enough swapspace to compile qemu"
		ewarn "or even more if you use MAKEOPTS>-j1. Using swap to compile takes a long time"
	fi

	use qemu_softmmu_targets_x86_64 || \
		ewarn "You disabled default target QEMU_SOFTMMU_TARGETS=x86_64"
}

src_prepare() {
	if use !doc ; then
		sed -i '/$(DESTDIR)$(docdir)/d' Makefile || \
			die "Died changing makefile for preventing docs to get automatically installed"
	fi

	# 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

	# removing the -g flag if not debugging (die not necessary)
	if use !debug ; then
		sed -i "s/CFLAGS=\"-g /CFLAGS=\"/g" configure
		sed -i "s/LDFLAGS=\"-g /LDFLAGS=\"/g" configure
	fi
}

src_configure() {
	local conf_opts audio_opts 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 "${softmmu_targets}" ]; then
		conf_opts="${conf_opts} --disable-system"
	else
		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="${conf_opts} --disable-xen"
	conf_opts="${conf_opts} --disable-darwin-user --disable-bsd-user"

	# debug options
	use debug && conf_opts="${conf_opts} --disable-strip --enable-debug"

	# audio options
	use oss && 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}"

	# econf does not work: configure don't recognize
	# --build --host --infodir --localstatedir
	# the lines till conf_opts variable replace the econf tweaks
	./configure \
        --prefix="${EPREFIX}"/usr \
        --datadir="${EPREFIX}"/usr/share/qemu \
        --mandir="${EPREFIX}"/usr/share/man \
        --sysconfdir="${EPREFIX}"/etc \
        --docdir="${EPREFIX}"/usr/share/doc/${P} \
        --bindir="${EPREFIX}"/usr/bin \
        ${CTARGET:+--target=${CTARGET}} \
		${conf_opts} \
		$(use_enable doc docs ) \
		$(use_enable aio linux-aio) \
		$(use_enable bluetooth bluez) \
		$(use_enable brltty brlapi) \
		$(use_enable curl) \
		$(use_enable fdt) \
		$(use_enable hardened user-pie) \
		$(use_enable jpeg vnc-jpeg) \
		$(use_enable ncurses curses) \
		$(use_enable png vnc-png) \
		$(use_enable sasl vnc-sasl) \
		$(use_enable sdl) \
		$(use_enable ssl vnc-tls) \
		$(use_enable vde) \
		$(use_enable nptl) \
		--disable-werror \
		--disable-kvm \
		--enable-uuid \
		--audio-drv-list="${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_compile() {
	# Restricting parallel build until we get a patch to fix this
	emake || die
}

src_install() {
	# non-standard install procedure due to makefile installation of writable files
	mkdir "${T}/tmpinstall"
	emake DESTDIR="${T}/tmpinstall" install || die "make install failed"

	# prevents the installation of writable files
	chmod a-w "${T}/tmpinstall"/usr/bin/*
	chmod a-w "${T}/tmpinstall"/usr/share/qemu/*

	# moving everything to imagedir
	mv "${T}/tmpinstall"/* "${D}"

	if [ ! -z "${softmmu_targets}" ]; then
		exeinto /etc/qemu
		use qemu-ifup && { doexe \
			"${FILESDIR}/qemu-ifup" \
			"${FILESDIR}/qemu-ifdown" \
			|| die "qemu interface scripts missing" ; }
	fi

	dodoc Changelog MAINTAINERS TODO pci-ids.txt || die
	newdoc pc-bios/README README.pc-bios || die
}

pkg_postinst() {
	use qemu-ifup || return
	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 "qemu-ifup script from /etc/qemu."
	echo
}