Initial commit of qt4-build-multilib.eclass

2 files changed, 820 insertions, 1 deletions

diff --git a/eclass/ChangeLog b/eclass/ChangeLog
index 404f12f6761f..d95721deaeb5 100644
--- a/eclass/ChangeLog
+++ b/eclass/ChangeLog
@@ -1,6 +1,9 @@
 # ChangeLog for eclass directory
 # Copyright 1999-2014 Gentoo Foundation; Distributed under the GPL v2
-# $Header: /var/cvsroot/gentoo-x86/eclass/ChangeLog,v 1.1415 2014/11/12 23:26:36 monsieurp Exp $
+# $Header: /var/cvsroot/gentoo-x86/eclass/ChangeLog,v 1.1416 2014/11/13 01:45:07 pesa Exp $
+
+  13 Nov 2014; Davide Pesavento <pesa@gentoo.org> +qt4-build-multilib.eclass:
+  Initial commit of qt4-build-multilib.eclass
 
   12 Nov 2014; Patrice Clement <monsieurp@gentoo.org> perl-module.eclass:
   Documented nearly all functions.
diff --git a/eclass/qt4-build-multilib.eclass b/eclass/qt4-build-multilib.eclass
new file mode 100644
index 000000000000..709857157148
--- /dev/null
+++ b/eclass/qt4-build-multilib.eclass
@@ -0,0 +1,816 @@
+# Copyright 1999-2014 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: /var/cvsroot/gentoo-x86/eclass/qt4-build-multilib.eclass,v 1.1 2014/11/13 01:45:07 pesa Exp $
+
+# @ECLASS: qt4-build-multilib.eclass
+# @MAINTAINER:
+# Qt herd <qt@gentoo.org>
+# @AUTHOR:
+# Davide Pesavento <pesa@gentoo.org>
+# @BLURB: Eclass for Qt4 split ebuilds with multilib support.
+# @DESCRIPTION:
+# This eclass contains various functions that are used when building Qt4.
+# Requires EAPI 5.
+
+case ${EAPI} in
+	5)	: ;;
+	*)	die "qt4-build-multilib.eclass: unsupported EAPI=${EAPI:-0}" ;;
+esac
+
+inherit eutils flag-o-matic multilib multilib-minimal toolchain-funcs
+
+HOMEPAGE="https://www.qt.io/ https://qt-project.org/"
+LICENSE="|| ( LGPL-2.1 GPL-3 )"
+SLOT="4"
+
+case ${PV} in
+	4.?.9999)
+		QT4_BUILD_TYPE="live"
+		EGIT_REPO_URI=(
+			"git://gitorious.org/qt/qt.git"
+			"https://git.gitorious.org/qt/qt.git"
+		)
+		EGIT_BRANCH=${PV%.9999}
+		inherit git-r3
+		;;
+	*)
+		QT4_BUILD_TYPE="release"
+		MY_P=qt-everywhere-opensource-src-${PV/_/-}
+		SRC_URI="http://download.qt-project.org/archive/qt/${PV%.*}/${PV}/${MY_P}.tar.gz"
+		S=${WORKDIR}/${MY_P}
+		;;
+esac
+
+if [[ ${PN} != qttranslations ]]; then
+	IUSE="aqua debug pch"
+	[[ ${PN} != qtxmlpatterns ]] && IUSE+=" +exceptions"
+fi
+
+DEPEND="
+	dev-lang/perl
+	virtual/pkgconfig[${MULTILIB_USEDEP}]
+"
+RDEPEND="
+	dev-qt/qtchooser
+"
+
+
+# src_{configure,compile,test,install} are inherited from multilib-minimal
+EXPORT_FUNCTIONS src_unpack src_prepare pkg_postinst pkg_postrm
+
+multilib_src_configure()	{ qt4_multilib_src_configure; }
+multilib_src_compile()		{ qt4_multilib_src_compile; }
+multilib_src_test()		{ qt4_multilib_src_test; }
+multilib_src_install()		{ qt4_multilib_src_install; }
+multilib_src_install_all()	{ qt4_multilib_src_install_all; }
+
+
+# @ECLASS-VARIABLE: PATCHES
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# Array variable containing all the patches to be applied. This variable
+# is expected to be defined in the global scope of ebuilds. Make sure to
+# specify the full path. This variable is used in src_prepare phase.
+#
+# Example:
+# @CODE
+#	PATCHES=(
+#		"${FILESDIR}/mypatch.patch"
+#		"${FILESDIR}/mypatch2.patch"
+#	)
+# @CODE
+
+# @ECLASS-VARIABLE: QT4_TARGET_DIRECTORIES
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# Space-separated list of directories that will be configured,
+# compiled, and installed. All paths must be relative to ${S}.
+
+# @ECLASS-VARIABLE: QT4_VERBOSE_BUILD
+# @DESCRIPTION:
+# Set to false to reduce build output during compilation.
+: ${QT4_VERBOSE_BUILD:=true}
+
+# @ECLASS-VARIABLE: QCONFIG_ADD
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# List of options that must be added to QT_CONFIG in qconfig.pri
+
+# @ECLASS-VARIABLE: QCONFIG_REMOVE
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# List of options that must be removed from QT_CONFIG in qconfig.pri
+
+# @ECLASS-VARIABLE: QCONFIG_DEFINE
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# List of macros that must be defined in QtCore/qconfig.h
+
+# @FUNCTION: qt4-build-multilib_src_unpack
+# @DESCRIPTION:
+# Unpacks the sources.
+qt4-build-multilib_src_unpack() {
+	if [[ $(gcc-major-version) -lt 4 ]] || [[ $(gcc-major-version) -eq 4 && $(gcc-minor-version) -lt 4 ]]; then
+		ewarn
+		ewarn "Using a GCC version lower than 4.4 is not supported."
+		ewarn
+	fi
+
+	if [[ ${PN} == qtwebkit ]]; then
+		eshopts_push -s extglob
+		if is-flagq '-g?(gdb)?([1-9])'; then
+			ewarn
+			ewarn "You have enabled debug info (probably have -g or -ggdb in your CFLAGS/CXXFLAGS)."
+			ewarn "You may experience really long compilation times and/or increased memory usage."
+			ewarn "If compilation fails, please try removing -g/-ggdb before reporting a bug."
+			ewarn "For more info check out https://bugs.gentoo.org/307861"
+			ewarn
+		fi
+		eshopts_pop
+	fi
+
+	case ${QT4_BUILD_TYPE} in
+		live)    git-r3_src_unpack ;;
+		release) default ;;
+	esac
+}
+
+# @FUNCTION: qt4-build-multilib_src_prepare
+# @DESCRIPTION:
+# Prepare the sources before the configure phase. Strip CFLAGS if necessary, and fix
+# the build system in order to respect CFLAGS/CXXFLAGS/LDFLAGS specified in make.conf.
+qt4-build-multilib_src_prepare() {
+	if [[ ${PN} != qtcore ]]; then
+		# avoid unnecessary qmake recompilations
+		sed -i -e 's/^if true;/if false;/' configure \
+			|| die "sed failed (skip qmake bootstrap)"
+	fi
+
+	# skip X11 tests in non-gui packages to avoid spurious dependencies
+	if has ${PN} qtbearer qtcore qtdbus qtscript qtsql qttest qttranslations qtxmlpatterns; then
+		sed -i -e '/^if.*PLATFORM_X11.*CFG_GUI/,/^fi$/d' configure \
+			|| die "sed failed (skip X11 tests)"
+	fi
+
+	if use_if_iuse aqua; then
+		sed -i \
+			-e '/^CONFIG/s:app_bundle::' \
+			-e '/^CONFIG/s:plugin_no_soname:plugin_with_soname absolute_library_soname:' \
+			mkspecs/$(qt4_get_mkspec)/qmake.conf \
+			|| die "sed failed (aqua)"
+
+		# we are crazy and build cocoa + qt3support
+		if { ! in_iuse qt3support || use qt3support; } && [[ ${CHOST##*-darwin} -ge 9 ]]; then
+			sed -i -e "/case \"\$PLATFORM,\$CFG_MAC_COCOA\" in/,/;;/ s|CFG_QT3SUPPORT=\"no\"|CFG_QT3SUPPORT=\"yes\"|" \
+				configure || die "sed failed (cocoa + qt3support)"
+		fi
+	fi
+
+	# Bug 261632
+	if use ppc64; then
+		append-flags -mminimal-toc
+	fi
+
+	# Bug 373061
+	# qmake bus errors with -O2 or -O3 but -O1 works
+	if [[ ${CHOST} == *86*-apple-darwin* ]]; then
+		replace-flags -O[23] -O1
+	fi
+
+	# Bug 417105
+	# graphite on gcc 4.7 causes miscompilations
+	if [[ $(gcc-version) == "4.7" ]]; then
+		filter-flags -fgraphite-identity
+	fi
+
+	# Read also AR from the environment
+	sed -i -e 's/^SYSTEM_VARIABLES="/&AR /' \
+		configure || die "sed SYSTEM_VARIABLES failed"
+
+	# Reset QMAKE_*FLAGS_{RELEASE,DEBUG} variables,
+	# or they will override user's flags (.qmake.cache)
+	sed -i -e '/^SYSTEM_VARIABLES=/ i \
+		QMakeVar set QMAKE_CFLAGS_RELEASE\
+		QMakeVar set QMAKE_CFLAGS_DEBUG\
+		QMakeVar set QMAKE_CXXFLAGS_RELEASE\
+		QMakeVar set QMAKE_CXXFLAGS_DEBUG\
+		QMakeVar set QMAKE_LFLAGS_RELEASE\
+		QMakeVar set QMAKE_LFLAGS_DEBUG\n' \
+		configure || die "sed QMAKE_*FLAGS_{RELEASE,DEBUG} failed"
+
+	# Respect CC, CXX, LINK and *FLAGS in config.tests
+	find config.tests/unix -name '*.test' -type f -print0 | xargs -0 \
+		sed -i -e "/bin\/qmake/ s: \"\$SRCDIR/: \
+			'QMAKE_CC=$(tc-getCC)'    'QMAKE_CXX=$(tc-getCXX)'      'QMAKE_LINK=$(tc-getCXX)' \
+			'QMAKE_CFLAGS+=${CFLAGS}' 'QMAKE_CXXFLAGS+=${CXXFLAGS}' 'QMAKE_LFLAGS+=${LDFLAGS}'&:" \
+		|| die "sed config.tests failed"
+
+	# Bug 172219
+	sed -e 's:/X11R6/:/:' -i mkspecs/$(qt4_get_mkspec)/qmake.conf || die
+
+	if [[ ${CHOST} == *-darwin* ]]; then
+		# Set FLAGS and remove -arch, since our gcc-apple is multilib crippled (by design)
+		sed -i \
+			-e "s:QMAKE_CFLAGS_RELEASE.*=.*:QMAKE_CFLAGS_RELEASE=${CFLAGS}:" \
+			-e "s:QMAKE_CXXFLAGS_RELEASE.*=.*:QMAKE_CXXFLAGS_RELEASE=${CXXFLAGS}:" \
+			-e "s:QMAKE_LFLAGS_RELEASE.*=.*:QMAKE_LFLAGS_RELEASE=-headerpad_max_install_names ${LDFLAGS}:" \
+			-e "s:-arch\s\w*::g" \
+			mkspecs/common/g++-macx.conf \
+			|| die "sed g++-macx.conf failed"
+
+		# Fix configure's -arch settings that appear in qmake/Makefile and also
+		# fix arch handling (automagically duplicates our -arch arg and breaks
+		# pch). Additionally disable Xarch support.
+		sed -i \
+			-e "s:-arch i386::" \
+			-e "s:-arch ppc::" \
+			-e "s:-arch x86_64::" \
+			-e "s:-arch ppc64::" \
+			-e "s:-arch \$i::" \
+			-e "/if \[ ! -z \"\$NATIVE_64_ARCH\" \]; then/,/fi/ d" \
+			-e "s:CFG_MAC_XARCH=yes:CFG_MAC_XARCH=no:g" \
+			-e "s:-Xarch_x86_64::g" \
+			-e "s:-Xarch_ppc64::g" \
+			configure mkspecs/common/gcc-base-macx.conf mkspecs/common/g++-macx.conf \
+			|| die "sed -arch/-Xarch failed"
+
+		# On Snow Leopard don't fall back to 10.5 deployment target.
+		if [[ ${CHOST} == *-apple-darwin10 ]]; then
+			sed -i \
+				-e "s:QMakeVar set QMAKE_MACOSX_DEPLOYMENT_TARGET.*:QMakeVar set QMAKE_MACOSX_DEPLOYMENT_TARGET 10.6:g" \
+				-e "s:-mmacosx-version-min=10.[0-9]:-mmacosx-version-min=10.6:g" \
+				configure mkspecs/common/g++-macx.conf \
+				|| die "sed deployment target failed"
+		fi
+	fi
+
+	# this is needed for all systems with a separate -liconv, except
+	# Darwin, for which the sources already cater for -liconv
+	if use !elibc_glibc && [[ ${CHOST} != *-darwin* ]]; then
+		sed -e 's|mac:\(LIBS += -liconv\)|\1|g' \
+			-i config.tests/unix/iconv/iconv.pro \
+			|| die "sed iconv.pro failed"
+	fi
+
+	# we need some patches for Solaris
+	sed -i -e '/^QMAKE_LFLAGS_THREAD/a\QMAKE_LFLAGS_DYNAMIC_LIST = -Wl,--dynamic-list,' \
+		mkspecs/$(qt4_get_mkspec)/qmake.conf || die
+	# use GCC over SunStudio
+	sed -i -e '/PLATFORM=solaris-cc/s/cc/g++/' configure || die
+	# do not flirt with non-Prefix stuff, we're quite possessive
+	sed -i -e '/^QMAKE_\(LIB\|INC\)DIR\(_X11\|_OPENGL\|\)\t/s/=.*$/=/' \
+		mkspecs/$(qt4_get_mkspec)/qmake.conf || die
+
+	# apply patches
+	[[ ${PATCHES[@]} ]] && epatch "${PATCHES[@]}"
+	epatch_user
+}
+
+qt4_multilib_src_configure() {
+	qt4_prepare_env
+
+	qt4_symlink_tools_to_build_dir
+
+	# toolchain setup
+	tc-export CC CXX OBJCOPY STRIP
+	export AR="$(tc-getAR) cqs"
+	export LD="$(tc-getCXX)"
+
+	# convert tc-arch to the values supported by Qt
+	local arch=
+	case $(tc-arch) in
+		amd64|x64-*)		  arch=x86_64 ;;
+		ppc*-macos)		  arch=ppc ;;
+		ppc*)			  arch=powerpc ;;
+		sparc*)			  arch=sparc ;;
+		x86-macos)		  arch=x86 ;;
+		x86*)			  arch=i386 ;;
+		alpha|arm|ia64|mips|s390) arch=$(tc-arch) ;;
+		hppa|sh)		  arch=generic ;;
+		*) die "qt4-build-multilib.eclass: unsupported tc-arch '$(tc-arch)'" ;;
+	esac
+
+	# configure arguments
+	local conf=(
+		# installation paths
+		-prefix "${QT4_PREFIX}"
+		-bindir "${QT4_BINDIR}"
+		-libdir "${QT4_LIBDIR}"
+		-docdir "${QT4_DOCDIR}"
+		-headerdir "${QT4_HEADERDIR}"
+		-plugindir "${QT4_PLUGINDIR}"
+		-importdir "${QT4_IMPORTDIR}"
+		-datadir "${QT4_DATADIR}"
+		-translationdir "${QT4_TRANSLATIONDIR}"
+		-sysconfdir "${QT4_SYSCONFDIR}"
+		-examplesdir "${QT4_EXAMPLESDIR}"
+		-demosdir "${QT4_DEMOSDIR}"
+
+		# debug/release
+		$(use_if_iuse debug && echo -debug || echo -release)
+		-no-separate-debug-info
+
+		# licensing stuff
+		-opensource -confirm-license
+
+		# build shared libraries
+		-shared
+
+		# skip recursive processing of .pro files at the end of configure
+		# (we run qmake by ourselves), thus saving quite a bit of time
+		-dont-process
+
+		# always enable large file support
+		-largefile
+
+		# exceptions USE flag
+		$(in_iuse exceptions && qt_use exceptions || echo -exceptions)
+
+		# build STL support
+		-stl
+
+		# architecture/platform (mkspec)
+		-arch ${arch}
+		-platform $(qt4_get_mkspec)
+
+		# prefer system libraries
+		-system-zlib
+
+		# exclude examples and demos from default build
+		-nomake examples
+		-nomake demos
+
+		# disable rpath on non-prefix (bugs 380415 and 417169)
+		$(use prefix || echo -no-rpath)
+
+		# verbosity of the configure and build phases
+		-verbose $(${QT4_VERBOSE_BUILD} || echo -silent)
+
+		# precompiled headers don't work on hardened, where the flag is masked
+		$(in_iuse pch && qt_use pch || echo -no-pch)
+
+		# enable linker optimizations to reduce relocations, except on Solaris
+		# where this flag seems to introduce major breakage to applications,
+		# mostly to be seen as a core dump with the message:
+		# "QPixmap: Must construct a QApplication before a QPaintDevice"
+		$([[ ${CHOST} != *-solaris* ]] && echo -reduce-relocations)
+
+		# this one is needed for all systems with a separate -liconv, apart from
+		# Darwin, for which the sources already cater for -liconv
+		$(use !elibc_glibc && [[ ${CHOST} != *-darwin* ]] && echo -liconv)
+	)
+
+	if use_if_iuse aqua; then
+		if [[ ${CHOST##*-darwin} -ge 9 ]]; then
+			conf+=(
+				# on (snow) leopard use the new (frameworked) cocoa code
+				-cocoa -framework
+				# add hint for the framework location
+				-F"${QT4_LIBDIR}"
+			)
+		else
+			conf+=(-no-framework)
+		fi
+	fi
+
+	conf+=(
+		# module-specific options
+		"${myconf[@]}"
+	)
+
+	einfo "Configuring with: ${conf[@]}"
+	"${S}"/configure "${conf[@]}" || die "configure failed"
+
+	# configure is stupid and assigns QMAKE_LFLAGS twice,
+	# thus the previous -rpath-link flag gets overwritten
+	# and some packages (e.g. qthelp) fail to link
+	sed -i -e '/^QMAKE_LFLAGS =/ s:$: $$QMAKE_LFLAGS:' \
+		.qmake.cache || die "sed .qmake.cache failed"
+
+	qt4_qmake
+	qt4_foreach_target_subdir qt4_qmake
+}
+
+qt4_multilib_src_compile() {
+	qt4_prepare_env
+
+	qt4_foreach_target_subdir emake
+}
+
+qt4_multilib_src_test() {
+	qt4_prepare_env
+
+	qt4_foreach_target_subdir emake -j1 check
+}
+
+qt4_multilib_src_install() {
+	qt4_prepare_env
+
+	qt4_foreach_target_subdir emake INSTALL_ROOT="${D}" install
+
+	if [[ ${PN} == qtcore ]]; then
+		set -- emake INSTALL_ROOT="${D}" install_{mkspecs,qmake}
+		einfo "Running $*"
+		"$@"
+
+		# install env.d file
+		cat > "${T}/44qt4-${CHOST}" <<-_EOF_
+			LDPATH="${QT4_LIBDIR}"
+		_EOF_
+		doenvd "${T}/44qt4-${CHOST}"
+
+		# install qtchooser configuration file
+		cat > "${T}/qt4-${CHOST}.conf" <<-_EOF_
+			${QT4_BINDIR}
+			${QT4_LIBDIR}
+		_EOF_
+
+		(
+			insinto /etc/xdg/qtchooser
+			doins "${T}/qt4-${CHOST}.conf"
+		)
+
+		if multilib_is_native_abi; then
+			# convenience symlinks
+			dosym qt4-"${CHOST}".conf /etc/xdg/qtchooser/4.conf
+			dosym qt4-"${CHOST}".conf /etc/xdg/qtchooser/qt4.conf
+			# TODO bug 522646: write an eselect module to manage default.conf
+			dosym qt4.conf /etc/xdg/qtchooser/default.conf
+		fi
+	fi
+
+	install_qconfigs
+	fix_library_files
+	fix_includes
+}
+
+qt4_multilib_src_install_all() {
+	if [[ ${PN} == qtcore ]]; then
+		# include gentoo-qconfig.h at the beginning of Qt{,Core}/qconfig.h
+		if use aqua && [[ ${CHOST#*-darwin} -ge 9 ]]; then
+			sed -i -e '1i #include <QtCore/Gentoo/gentoo-qconfig.h>\n' \
+				"${D}${QT4_LIBDIR}"/QtCore.framework/Headers/qconfig.h \
+				|| die "sed failed (qconfig.h)"
+			dosym "${QT4_HEADERDIR#${EPREFIX}}"/Gentoo \
+				"${QT4_LIBDIR#${EPREFIX}}"/QtCore.framework/Headers/Gentoo
+		else
+			sed -i -e '1i #include <Gentoo/gentoo-qconfig.h>\n' \
+				"${D}${QT4_HEADERDIR}"/Qt{,Core}/qconfig.h \
+				|| die "sed failed (qconfig.h)"
+		fi
+
+		dodir "${QT4_DATADIR#${EPREFIX}}"/mkspecs/gentoo
+		mv "${D}${QT4_DATADIR}"/mkspecs/{qconfig.pri,gentoo/} || die
+	fi
+
+	# install private headers of a few modules
+	if has ${PN} qtcore qtdeclarative qtgui qtscript; then
+		local moduledir=${PN#qt}
+		local modulename=Qt$(tr 'a-z' 'A-Z' <<< ${moduledir:0:1})${moduledir:1}
+		[[ ${moduledir} == core ]] && moduledir=corelib
+
+		einfo "Installing private headers into ${QT4_HEADERDIR}/${modulename}/private"
+		insinto "${QT4_HEADERDIR#${EPREFIX}}"/${modulename}/private
+		find "${S}"/src/${moduledir} -type f -name '*_p.h' -exec doins '{}' + || die
+	fi
+
+	# remove .la files since we are building only shared libraries
+	prune_libtool_files
+}
+
+# @FUNCTION: qt4-build-multilib_pkg_postinst
+# @DESCRIPTION:
+# Regenerate configuration, plus throw a message about possible
+# breakages and proposed solutions.
+qt4-build-multilib_pkg_postinst() {
+	generate_qconfigs
+}
+
+# @FUNCTION: qt4-build-multilib_pkg_postrm
+# @DESCRIPTION:
+# Regenerate configuration when the package is completely removed.
+qt4-build-multilib_pkg_postrm() {
+	generate_qconfigs
+}
+
+# @FUNCTION: qt_use
+# @USAGE: <flag> [feature] [enableval]
+# @DESCRIPTION:
+# Outputs "-${enableval}-${feature}" if <flag> is enabled, "-no-${feature}"
+# otherwise. If [feature] is not specified, <flag> is used in its place.
+# If [enableval] is not specified, the "-${enableval}" prefix is omitted.
+qt_use() {
+	use "$1" && echo "${3:+-$3}-${2:-$1}" || echo "-no-${2:-$1}"
+}
+
+# @FUNCTION: qt_native_use
+# @USAGE: <flag> [feature] [enableval]
+# @DESCRIPTION:
+# Outputs "-${enableval}-${feature}" if <flag> is enabled and we are currently
+# building for the native ABI, "-no-${feature}" otherwise. If [feature] is not
+# specified, <flag> is used in its place. If [enableval] is not specified,
+# the "-${enableval}" prefix is omitted.
+qt_native_use() {
+	multilib_is_native_abi && use "$1" && echo "${3:+-$3}-${2:-$1}" || echo "-no-${2:-$1}"
+}
+
+
+######  Internal functions  ######
+
+# @FUNCTION: qt4_prepare_env
+# @INTERNAL
+# @DESCRIPTION:
+# Prepares the environment for building Qt.
+qt4_prepare_env() {
+	# setup installation directories
+	QT4_PREFIX=${EPREFIX}/usr
+	QT4_HEADERDIR=${QT4_PREFIX}/include/qt4
+	QT4_LIBDIR=${QT4_PREFIX}/$(get_libdir)/qt4
+	QT4_PCDIR=${QT4_PREFIX}/$(get_libdir)/pkgconfig
+	QT4_BINDIR=${QT4_LIBDIR}/bin
+	QT4_PLUGINDIR=${QT4_LIBDIR}/plugins
+	QT4_IMPORTDIR=${QT4_LIBDIR}/imports
+	QT4_DATADIR=${QT4_PREFIX}/share/qt4
+	QT4_DOCDIR=${QT4_PREFIX}/share/doc/qt-${PV}
+	QT4_TRANSLATIONDIR=${QT4_DATADIR}/translations
+	QT4_EXAMPLESDIR=${QT4_DATADIR}/examples
+	QT4_DEMOSDIR=${QT4_DATADIR}/demos
+	QT4_SYSCONFDIR=${EPREFIX}/etc/qt4
+	QMAKE_LIBDIR_QT=${QT4_LIBDIR}
+
+	export XDG_CONFIG_HOME="${T}"
+}
+
+# @FUNCTION: qt4_foreach_target_subdir
+# @INTERNAL
+# @DESCRIPTION:
+# Executes the given command inside each directory listed in QT4_TARGET_DIRECTORIES.
+qt4_foreach_target_subdir() {
+	local subdir
+	for subdir in ${QT4_TARGET_DIRECTORIES}; do
+		mkdir -p "${subdir}" || die
+		pushd "${subdir}" >/dev/null || die
+
+		einfo "Running $* ${subdir:+in ${subdir}}"
+		"$@"
+
+		popd >/dev/null || die
+	done
+}
+
+# @FUNCTION: qt4_symlink_tools_to_build_dir
+# @INTERNAL
+# @DESCRIPTION:
+# Symlinks qtcore tools to BUILD_DIR,
+# so that they can be used when building other modules.
+qt4_symlink_tools_to_build_dir() {
+	local tool= tools=()
+	if [[ ${PN} != qtcore ]]; then
+		tools+=(qmake moc rcc uic)
+	fi
+
+	mkdir -p "${BUILD_DIR}"/bin || die
+	pushd "${BUILD_DIR}"/bin >/dev/null || die
+
+	for tool in "${tools[@]}"; do
+		[[ -e ${QT4_BINDIR}/${tool} ]] || continue
+		ln -s "${QT4_BINDIR}/${tool}" . || die "failed to symlink ${tool}"
+	done
+
+	popd >/dev/null || die
+}
+
+# @FUNCTION: qt4_qmake
+# @INTERNAL
+# @DESCRIPTION:
+# Helper function that runs qmake in the current target subdir.
+# Intended to be called by qt4_foreach_target_subdir().
+qt4_qmake() {
+	local projectdir=${PWD/#${BUILD_DIR}/${S}}
+
+	"${BUILD_DIR}"/bin/qmake \
+		CONFIG+=nostrip \
+		LIBS+=-L"${QT4_LIBDIR}" \
+		"${projectdir}" \
+		|| die "qmake failed (${projectdir})"
+}
+
+# @FUNCTION: install_qconfigs
+# @INTERNAL
+# @DESCRIPTION:
+# Install gentoo-specific mkspecs configurations.
+install_qconfigs() {
+	local x
+	if [[ -n ${QCONFIG_ADD} || -n ${QCONFIG_REMOVE} ]]; then
+		for x in QCONFIG_ADD QCONFIG_REMOVE; do
+			[[ -n ${!x} ]] && echo ${x}=${!x} >> "${BUILD_DIR}"/${PN}-qconfig.pri
+		done
+		insinto ${QT4_DATADIR#${EPREFIX}}/mkspecs/gentoo
+		doins "${BUILD_DIR}"/${PN}-qconfig.pri
+	fi
+
+	if [[ -n ${QCONFIG_DEFINE} ]]; then
+		for x in ${QCONFIG_DEFINE}; do
+			echo "#define ${x}" >> "${BUILD_DIR}"/gentoo-${PN}-qconfig.h
+		done
+		insinto ${QT4_HEADERDIR#${EPREFIX}}/Gentoo
+		doins "${BUILD_DIR}"/gentoo-${PN}-qconfig.h
+	fi
+}
+
+# @FUNCTION: generate_qconfigs
+# @INTERNAL
+# @DESCRIPTION:
+# Generates gentoo-specific qconfig.{h,pri}.
+generate_qconfigs() {
+	if [[ -n ${QCONFIG_ADD} || -n ${QCONFIG_REMOVE} || -n ${QCONFIG_DEFINE} || ${PN} == qtcore ]]; then
+		local x qconfig_add qconfig_remove qconfig_new
+		for x in "${ROOT}${QT4_DATADIR}"/mkspecs/gentoo/*-qconfig.pri; do
+			[[ -f ${x} ]] || continue
+			qconfig_add+=" $(sed -n 's/^QCONFIG_ADD=//p' "${x}")"
+			qconfig_remove+=" $(sed -n 's/^QCONFIG_REMOVE=//p' "${x}")"
+		done
+
+		# these error checks do not use die because dying in pkg_post{inst,rm}
+		# just makes things worse.
+		if [[ -e "${ROOT}${QT4_DATADIR}"/mkspecs/gentoo/qconfig.pri ]]; then
+			# start with the qconfig.pri that qtcore installed
+			if ! cp "${ROOT}${QT4_DATADIR}"/mkspecs/gentoo/qconfig.pri \
+				"${ROOT}${QT4_DATADIR}"/mkspecs/qconfig.pri; then
+				eerror "cp qconfig failed."
+				return 1
+			fi
+
+			# generate list of QT_CONFIG entries from the existing list
+			# including qconfig_add and excluding qconfig_remove
+			for x in $(sed -n 's/^QT_CONFIG +=//p' \
+				"${ROOT}${QT4_DATADIR}"/mkspecs/qconfig.pri) ${qconfig_add}; do
+					has ${x} ${qconfig_remove} || qconfig_new+=" ${x}"
+			done
+
+			# replace the existing QT_CONFIG list with qconfig_new
+			if ! sed -i -e "s/QT_CONFIG +=.*/QT_CONFIG += ${qconfig_new}/" \
+				"${ROOT}${QT4_DATADIR}"/mkspecs/qconfig.pri; then
+				eerror "Sed for QT_CONFIG failed"
+				return 1
+			fi
+
+			# create Gentoo/qconfig.h
+			if [[ ! -e ${ROOT}${QT4_HEADERDIR}/Gentoo ]]; then
+				if ! mkdir -p "${ROOT}${QT4_HEADERDIR}"/Gentoo; then
+					eerror "mkdir ${QT4_HEADERDIR}/Gentoo failed"
+					return 1
+				fi
+			fi
+			: > "${ROOT}${QT4_HEADERDIR}"/Gentoo/gentoo-qconfig.h
+			for x in "${ROOT}${QT4_HEADERDIR}"/Gentoo/gentoo-*-qconfig.h; do
+				[[ -f ${x} ]] || continue
+				cat "${x}" >> "${ROOT}${QT4_HEADERDIR}"/Gentoo/gentoo-qconfig.h
+			done
+		else
+			rm -f "${ROOT}${QT4_DATADIR}"/mkspecs/qconfig.pri
+			rm -f "${ROOT}${QT4_HEADERDIR}"/Gentoo/gentoo-qconfig.h
+			rmdir "${ROOT}${QT4_DATADIR}"/mkspecs \
+				"${ROOT}${QT4_DATADIR}" \
+				"${ROOT}${QT4_HEADERDIR}"/Gentoo \
+				"${ROOT}${QT4_HEADERDIR}" 2>/dev/null
+		fi
+	fi
+}
+
+# @FUNCTION: fix_library_files
+# @INTERNAL
+# @DESCRIPTION:
+# Fixes the paths in *.prl and *.pc, as they are wrong due to sandbox, and
+# moves the *.pc files into the pkgconfig directory.
+fix_library_files() {
+	local libfile
+	for libfile in "${D}"/${QT4_LIBDIR}/{*.prl,pkgconfig/*.pc}; do
+		if [[ -e ${libfile} ]]; then
+			sed -i -e "s:${S}/lib:${QT4_LIBDIR}:g" ${libfile} || die "sed on ${libfile} failed"
+		fi
+	done
+
+	# pkgconfig files refer to WORKDIR/bin as the moc and uic locations
+	for libfile in "${D}"/${QT4_LIBDIR}/pkgconfig/*.pc; do
+		if [[ -e ${libfile} ]]; then
+			sed -i -e "s:${S}/bin:${QT4_BINDIR}:g" ${libfile} || die "sed on ${libfile} failed"
+
+		# Move .pc files into the pkgconfig directory
+		dodir ${QT4_PCDIR#${EPREFIX}}
+		mv ${libfile} "${D}"/${QT4_PCDIR}/ || die "moving ${libfile} to ${D}/${QT4_PCDIR}/ failed"
+		fi
+	done
+
+	# Don't install an empty directory
+	rmdir "${D}"/${QT4_LIBDIR}/pkgconfig
+}
+
+# @FUNCTION: fix_includes
+# @DESCRIPTION:
+# For MacOS X we need to add some symlinks when frameworks are
+# being used, to avoid complications with some more or less stupid packages.
+fix_includes() {
+	if use_if_iuse aqua && [[ ${CHOST##*-darwin} -ge 9 ]]; then
+		local frw dest f h rdir
+		# Some packages tend to include <Qt/...>
+		dodir "${QT4_HEADERDIR#${EPREFIX}}"/Qt
+
+		# Fake normal headers when frameworks are installed... eases life later
+		# on, make sure we use relative links though, as some ebuilds assume
+		# these dirs exist in src_install to add additional files
+		f=${QT4_HEADERDIR}
+		h=${QT4_LIBDIR}
+		while [[ -n ${f} && ${f%%/*} == ${h%%/*} ]] ; do
+			f=${f#*/}
+			h=${h#*/}
+		done
+		rdir=${h}
+		f="../"
+		while [[ ${h} == */* ]] ; do
+			f="${f}../"
+			h=${h#*/}
+		done
+		rdir="${f}${rdir}"
+
+		for frw in "${D}${QT4_LIBDIR}"/*.framework; do
+			[[ -e "${frw}"/Headers ]] || continue
+			f=$(basename ${frw})
+			dest="${QT4_HEADERDIR#${EPREFIX}}"/${f%.framework}
+			dosym "${rdir}"/${f}/Headers "${dest}"
+
+			# Link normal headers as well.
+			for hdr in "${D}/${QT4_LIBDIR}/${f}"/Headers/*; do
+				h=$(basename ${hdr})
+				dosym "../${rdir}"/${f}/Headers/${h} \
+					"${QT4_HEADERDIR#${EPREFIX}}"/Qt/${h}
+			done
+		done
+	fi
+}
+
+# @FUNCTION: qt4_get_mkspec
+# @INTERNAL
+# @DESCRIPTION:
+# Returns the right mkspec for the current CHOST/CXX combination.
+qt4_get_mkspec() {
+	local spec=
+
+	case ${CHOST} in
+		*-linux*)
+			spec=linux ;;
+		*-darwin*)
+			use_if_iuse aqua &&
+				spec=macx ||   # mac with carbon/cocoa
+				spec=darwin ;; # darwin/mac with X11
+		*-freebsd*|*-dragonfly*)
+			spec=freebsd ;;
+		*-netbsd*)
+			spec=netbsd ;;
+		*-openbsd*)
+			spec=openbsd ;;
+		*-aix*)
+			spec=aix ;;
+		hppa*-hpux*)
+			spec=hpux ;;
+		ia64*-hpux*)
+			spec=hpuxi ;;
+		*-solaris*)
+			spec=solaris ;;
+		*)
+			die "qt4-build-multilib.eclass: unsupported CHOST '${CHOST}'" ;;
+	esac
+
+	case $(tc-getCXX) in
+		*g++*)
+			spec+=-g++ ;;
+		*clang*)
+			if [[ -d ${S}/mkspecs/unsupported/${spec}-clang ]]; then
+				spec=unsupported/${spec}-clang
+			else
+				ewarn "${spec}-clang mkspec does not exist, falling back to ${spec}-g++"
+				spec+=-g++
+			fi ;;
+		*icpc*)
+			if [[ -d ${S}/mkspecs/${spec}-icc ]]; then
+				spec+=-icc
+			else
+				ewarn "${spec}-icc mkspec does not exist, falling back to ${spec}-g++"
+				spec+=-g++
+			fi ;;
+		*)
+			die "qt4-build-multilib.eclass: unsupported compiler '$(tc-getCXX)'" ;;
+	esac
+
+	# Add -64 for 64-bit prefix profiles
+	if use amd64-linux || use ia64-linux || use ppc64-linux ||
+		use x64-macos ||
+		use sparc64-freebsd || use x64-freebsd || use x64-openbsd ||
+		use ia64-hpux ||
+		use sparc64-solaris || use x64-solaris
+	then
+		[[ -d ${S}/mkspecs/${spec}-64 ]] && spec+=-64
+	fi
+
+	echo ${spec}
+}