path: root/eclass/qt4-build.eclass

# Copyright 1999-2009 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/qt4-build.eclass,v 1.82 2010/08/14 18:09:10 hwoarang Exp $

# @ECLASS: qt4-build.eclass
# @MAINTAINER:
# Ben de Groot <yngwin@gentoo.org>,
# Markos Chandras <hwoarang@gentoo.org>,
# Caleb Tennis <caleb@gentoo.org>
# Alex Alexander <wired@gentoo.org>
# @BLURB: Eclass for Qt4 split ebuilds.
# @DESCRIPTION:
# This eclass contains various functions that are used when building Qt4

inherit base eutils multilib toolchain-funcs flag-o-matic versionator

MY_PV=${PV/_/-}
if version_is_at_least 4.5.99999999; then
	MY_P=qt-everywhere-opensource-src-${MY_PV}
	[[ ${CATEGORY}/${PN} != x11-libs/qt-xmlpatterns ]] && IUSE="+exceptions"
else
	MY_P=qt-x11-opensource-src-${MY_PV}
fi

HOMEPAGE="http://qt.nokia.com/"
SRC_URI="http://get.qt.nokia.com/qt/source/${MY_P}.tar.gz"

LICENSE="|| ( LGPL-2.1 GPL-3 )"
IUSE+=" debug pch aqua"

RDEPEND="
	!<x11-libs/qt-assistant-${PV}
	!>x11-libs/qt-assistant-${PV}-r9999
	!<x11-libs/qt-core-${PV}
	!>x11-libs/qt-core-${PV}-r9999
	!<x11-libs/qt-dbus-${PV}
	!>x11-libs/qt-dbus-${PV}-r9999
	!<x11-libs/qt-demo-${PV}
	!>x11-libs/qt-demo-${PV}-r9999
	!<x11-libs/qt-gui-${PV}
	!>x11-libs/qt-gui-${PV}-r9999
	!<x11-libs/qt-multimedia-${PV}
	!>x11-libs/qt-multimedia-${PV}-r9999
	!<x11-libs/qt-opengl-${PV}
	!>x11-libs/qt-opengl-${PV}-r9999
	!<x11-libs/qt-phonon-${PV}
	!>x11-libs/qt-phonon-${PV}-r9999
	!<x11-libs/qt-qt3support-${PV}
	!>x11-libs/qt-qt3support-${PV}-r9999
	!<x11-libs/qt-script-${PV}
	!>x11-libs/qt-script-${PV}-r9999
	!<x11-libs/qt-sql-${PV}
	!>x11-libs/qt-sql-${PV}-r9999
	!<x11-libs/qt-svg-${PV}
	!>x11-libs/qt-svg-${PV}-r9999
	!<x11-libs/qt-test-${PV}
	!>x11-libs/qt-test-${PV}-r9999
	!<x11-libs/qt-webkit-${PV}
	!>x11-libs/qt-webkit-${PV}-r9999
	!<x11-libs/qt-xmlpatterns-${PV}
	!>x11-libs/qt-xmlpatterns-${PV}-r9999
"

S=${WORKDIR}/${MY_P}

# @FUNCTION: qt4-build_pkg_setup
# @DESCRIPTION:
# Sets up S, MY_P, PATH, and LD_LIBRARY_PATH
qt4-build_pkg_setup() {
	[[ ${EAPI} == 2 ]] && use !prefix && EPREFIX=

	# Protect users by not allowing downgrades between releases
	# Downgrading revisions within the same release should be allowed
	if has_version '>'${CATEGORY}/${P}-r9999 ; then
		if [[ -z $I_KNOW_WHAT_I_AM_DOING ]] ; then
			eerror "Sanity check to keep you from breaking your system:"
			eerror "  Downgrading Qt is completely unsupported and will break your system!"
			die "aborting to save your system"
		else
			ewarn "Downgrading Qt is completely unsupported and will break your system!"
		fi
	fi

	if [[ "${PN}" == "qt-webkit" ]]; then
		eshopts_push -s extglob
		if is-flagq '-g?(gdb)?([1-9])'; then
			echo
			ewarn "You have enabled debug info (probably have -g or -ggdb in your \$C{,XX}FLAGS)."
			ewarn "You may experience really long compilation times and/or increased memory usage."
			ewarn "If compilation fails, please try removing -g{,gdb} before reporting a bug."
			ewarn "For more info check out bug #307861"
			echo
		fi
		eshopts_pop
	fi

	PATH="${S}/bin${PATH:+:}${PATH}"
	if [[ ${CHOST} != *-darwin* ]]; then
		LD_LIBRARY_PATH="${S}/lib${LD_LIBRARY_PATH:+:}${LD_LIBRARY_PATH}"
	else
		DYLD_LIBRARY_PATH="${S}/lib${DYLD_LIBRARY_PATH:+:}${DYLD_LIBRARY_PATH}"
		# On MacOS we *need* at least src/gui/kernel/qapplication_mac.mm for
		# platform detection. Note: needs to come before any directories to
		# avoid extract failure.
		[[ ${CHOST} == *-apple-darwin* ]] && \
			QT4_EXTRACT_DIRECTORIES="src/gui/kernel/qapplication_mac.mm
				${QT4_EXTRACT_DIRECTORIES}"
	fi

	# Make sure ebuilds use the required EAPI
	if [[ ${EAPI} != [23] ]]; then
		eerror "The qt4-build eclass requires EAPI=2 or EAPI=3, but this ebuild is using"
		eerror "EAPI=${EAPI:-0}. The ebuild author or editor failed. This ebuild needs to be"
		eerror "fixed. Using qt4-build eclass without EAPI=2 or EAPI=3 will fail."
		die "qt4-build eclass requires EAPI=2 or EAPI=3"
	fi

	if ! version_is_at_least 4.1 $(gcc-version); then
		ewarn "Using a GCC version lower than 4.1 is not supported!"
	fi
}

# @ECLASS-VARIABLE: QT4_TARGET_DIRECTORIES
# @DESCRIPTION:
# Arguments for build_target_directories. Takes the directories, in which the
# code should be compiled. This is a space-separated list

# @ECLASS-VARIABLE: QT4_EXTRACT_DIRECTORIES
# @DESCRIPTION:
# Space separated list including the directories that will be extracted from Qt
# tarball

# @FUNCTION: qt4-build_src_unpack
# @DESCRIPTION:
# Unpacks the sources
qt4-build_src_unpack() {
	setqtenv
	local target targets=
	for target in configure LICENSE.GPL3 LICENSE.LGPL projects.pro \
		src/{qbase,qt_targets,qt_install}.pri bin config.tests mkspecs qmake \
		${QT4_EXTRACT_DIRECTORIES}; do
			targets+=" ${MY_P}/${target}"
	done

	echo tar xzf "${DISTDIR}"/${MY_P}.tar.gz ${targets}
	tar xzf "${DISTDIR}"/${MY_P}.tar.gz ${targets} || die
}

# @ECLASS-VARIABLE: PATCHES
# @DESCRIPTION:
# In case you have patches to apply, specify them in PATCHES variable. Make sure
# to specify the full path. This variable is necessary for src_prepare phase.
# example:
# PATCHES="${FILESDIR}"/mypatch.patch
#   ${FILESDIR}"/mypatch2.patch"
#

# @FUNCTION: qt4-build_src_prepare
# @DESCRIPTION:
# Prepare the sources before the configure phase. Strip CFLAGS if necessary, and fix
# source files in order to respect CFLAGS/CXXFLAGS/LDFLAGS specified on /etc/make.conf.
qt4-build_src_prepare() {
	setqtenv
	cd "${S}"
	
	# fix qt 4.7 regression that skips -fvisibility=hidden
	if version_is_at_least "4.7.0_beta1"; then
		sed -e "s/^gcc|g++)/*gcc|*g++)/" \
			-i config.tests/unix/fvisibility.test ||
				die "visibility fixing sed failed"
	fi
	# fix libx11 dependency on non X packages
	if version_is_at_least "4.7.0_beta2"; then
		local NOLIBX11PKG="qt-core qt-dbus qt-script qt-sql qt-test qt-xmlpatterns"
		hasq ${PN} ${NOLIBX11PKG} && qt_nolibx11
		[[ ${PN} == "qt-assistant" ]] && qt_assistant_cleanup
	fi

	if use aqua; then
		# provide a proper macx-g++-64
		use x64-macos && ln -s macx-g++ mkspecs/$(qt_mkspecs_dir)

		sed -e '/^CONFIG/s:app_bundle::' \
			-e '/^CONFIG/s:plugin_no_soname:plugin_with_soname absolute_library_soname:' \
			-i mkspecs/$(qt_mkspecs_dir)/qmake.conf || die "sed failed"
	fi

	if [[ ${PN} != qt-core ]]; then
		skip_qmake_build_patch
		skip_project_generation_patch
		symlink_binaries_to_buildtree
	fi

	if [[ ${CHOST} == *86*-apple-darwin* ]] ; then
		# qmake bus errors with -O2 but -O3 works
		replace-flags -O2 -O3
	fi

	if [[ ${CHOST} == arm* ]] ; then
		# Fails on arm with -Os, bug 331641
		# This can be removed once qt-4.7 is stable or the bug on gcc is fixed
		replace-flags -Os -O2
	fi

	# Bug 178652
	if [[ $(gcc-major-version) == 3 ]] && use amd64; then
		ewarn "Appending -fno-gcse to CFLAGS/CXXFLAGS"
		append-flags -fno-gcse
	fi

	# Unsupported old gcc versions - hardened needs this :(
	if [[ $(gcc-major-version) -lt 4 ]] ; then
		ewarn "Appending -fno-stack-protector to CXXFLAGS"
		append-cxxflags -fno-stack-protector
		# Bug 253127
		sed -e "/^QMAKE_CFLAGS\t/ s:$: -fno-stack-protector-all:" \
		-i "${S}"/mkspecs/common/g++.conf || die "sed ${S}/mkspecs/common/g++.conf failed"
	fi

	# Bug 261632
	if use ppc64; then
		ewarn "Appending -mminimal-toc to CFLAGS/CXXFLAGS"
		append-flags -mminimal-toc
	fi

	# Bug 282984 && Bug 295530
	sed -e "s:\(^SYSTEM_VARIABLES\):CC="$(tc-getCC)"\nCXX="$(tc-getCXX)"\nCFLAGS=\"${CFLAGS}\"\nCXXFLAGS=\"${CXXFLAGS}\"\nLDFLAGS=\"${LDFLAGS}\"\n\1:" \
		-i configure || die "sed qmake compilers failed"
	# bug 321335
	if version_is_at_least 4.6; then
		find ./config.tests/unix -name "*.test" -type f -exec grep -lZ \$MAKE '{}' \; | \
			xargs -0 \
			sed -e "s:\(\$MAKE\):\1 CC="$(tc-getCC)" CXX="$(tc-getCXX)" LD="$(tc-getCXX)" LINK="$(tc-getCXX)":g" \
				-i || die "sed test compilers failed"
	fi

	# Bug 172219
	sed -e "s:X11R6/::" \
		-i "${S}"/mkspecs/$(qt_mkspecs_dir)/qmake.conf || die "sed ${S}/mkspecs/$(qt_mkspecs_dir)/qmake.conf failed"

	if [[ ${CHOST} == *-darwin* ]]; then
		# Set FLAGS *and* remove -arch, since our gcc-apple is multilib
		# crippled (by design) :/
		sed -e "s:QMAKE_CFLAGS_RELEASE.*=.*:QMAKE_CFLAGS_RELEASE=${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" \
			-i mkspecs/common/mac-g++.conf || die "sed mkspecs/common/mac-g++.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 \
			-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" \
			-i configure mkspecs/common/mac-g++.conf || die "sed configure failed"

		# On Snow Leopard don't fall back to 10.5 deployment target.
		if [[ ${CHOST} == *-apple-darwin10 ]] ; then
			sed -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" \
				-i configure mkspecs/common/mac-g++.conf || die "sed configure failed"
		fi
	fi

	# this one is needed for all systems with a separate -liconv, apart from
	# Darwin, for which the sources already cater for -liconv
	if use !elibc_glibc && [[ ${CHOST} != *-darwin* ]] ; then
		sed \
			-e "s|mac:LIBS += -liconv|LIBS += -liconv|g" \
			-i config.tests/unix/iconv/iconv.pro \
			|| die "sed on 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/$(qt_mkspecs_dir)/qmake.conf || die
	# use GCC over SunStudio
	sed -i -e '/PLATFORM=solaris-cc/s/cc/g++/' configure || die
	# don't flirt with non-Prefix stuff, we're quite possessive
	sed -i -e '/^QMAKE_\(LIB\|INC\)DIR\(_X11\|_OPENGL\|\)\t/s/=.*$/=/' \
		mkspecs/$(qt_mkspecs_dir)/qmake.conf || die
	# strip predefined CFLAGS from qmake ( bug #312689 )
	sed -i '/^QMAKE_CFLAGS_\(RELEASE\|DEBUG\)/s:+=.*:+=:' mkspecs/common/g++.conf

	base_src_prepare
}

# @FUNCTION: qt4-build_src_configure
# @DESCRIPTION:
# Default configure phase
qt4-build_src_configure() {
	setqtenv
	myconf="$(standard_configure_options) ${myconf}"

	# 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* ]] && \
		myconf+=" -liconv"

	if has glib ${IUSE//+} && use glib; then
		# use -I, -L and -l from configure
		local glibflags="$(pkg-config --cflags --libs glib-2.0 gthread-2.0)"
		# avoid the -pthread argument
		myconf+=" ${glibflags//-pthread}"
		unset glibflags
	fi

	if use aqua ; then
		# On (snow) leopard use the new (frameworked) cocoa code.
		if [[ ${CHOST##*-darwin} -ge 9 ]] ; then
			myconf+=" -cocoa -framework"

			# We are crazy and build cocoa + qt3support :-)
			if use qt3support; then
				sed -e "/case \"\$PLATFORM,\$CFG_MAC_COCOA\" in/,/;;/ s|CFG_QT3SUPPORT=\"no\"|CFG_QT3SUPPORT=\"yes\"|" \
					-i configure
			fi

			# We need the source's headers, not the installed ones.
			myconf+=" -I${S}/include"

			# Add hint for the framework location.
			myconf+=" -F${QTLIBDIR}"
		fi
	else
		# freetype2 include dir is non-standard, thus include it on configure
		# use -I from configure
		myconf+=" $(pkg-config --cflags freetype2)"
	fi

	echo ./configure ${myconf}
	./configure ${myconf} || die "./configure failed"
	myconf=""
}

# @FUNCTION: qt4-build_src_compile
# @DESCRIPTION: Actual compile phase
qt4-build_src_compile() {
	setqtenv

	build_directories ${QT4_TARGET_DIRECTORIES}
}

# @FUNCTION: qt4-build_src_test
# @DESCRIPTION:
# Runs tests only in target directories.
qt4-build_src_test() {
	for dir in ${QT4_TARGET_DIRECTORIES}; do
		emake -j1 check -C ${dir}
	done
}

# @FUNCTION: fix_includes
# @DESCRIPTION:
# For MacOSX 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 aqua && [[ ${CHOST##*-darwin} -ge 9 ]] ; then
		# Some packages tend to include <Qt/...>
		dodir "${QTHEADERDIR#${EPREFIX}}"/Qt

		# Fake normal headers when frameworks are installed... eases life later on
		local dest f
		for frw in "${D}${QTLIBDIR}"/*.framework; do
			[[ -e "${frw}"/Headers ]] || continue
			f=$(basename ${frw})
			dest="${QTHEADERDIR#${EPREFIX}}"/${f%.framework}
			dosym "${QTLIBDIR#${EPREFIX}}"/${f}/Headers "${dest}"

			# Link normal headers as well.
			for hdr in "${D}/${QTLIBDIR}/${f}"/Headers/*; do
				h=$(basename ${hdr})
				dosym "${QTLIBDIR#${EPREFIX}}"/${f}/Headers/${h} "${QTHEADERDIR#${EPREFIX}}"/Qt/${h}
			done
		done
	fi
}

# @FUNCTION: qt4-build_src_install
# @DESCRIPTION:
# Perform the actual installation including some library fixes.
qt4-build_src_install() {
	[[ ${EAPI} == 2 ]] && use !prefix && ED=${D}
	setqtenv
	install_directories ${QT4_TARGET_DIRECTORIES}
	install_qconfigs
	fix_library_files
	fix_includes
	# remove .la files since we are building only shared Qt libraries
	find "${D}"${QTLIBDIR} -name "*.la" -print0 | xargs -0 rm 
}

# @FUNCTION: setqtenv
setqtenv() {
	# Set up installation directories
	QTBASEDIR=${EPREFIX}/usr/$(get_libdir)/qt4
	QTPREFIXDIR=${EPREFIX}/usr
	QTBINDIR=${EPREFIX}/usr/bin
	QTLIBDIR=${EPREFIX}/usr/$(get_libdir)/qt4
	QMAKE_LIBDIR_QT=${QTLIBDIR}
	QTPCDIR=${EPREFIX}/usr/$(get_libdir)/pkgconfig
	QTDATADIR=${EPREFIX}/usr/share/qt4
	QTDOCDIR=${EPREFIX}/usr/share/doc/qt-${PV}
	QTHEADERDIR=${EPREFIX}/usr/include/qt4
	QTPLUGINDIR=${QTLIBDIR}/plugins
	QTSYSCONFDIR=${EPREFIX}/etc/qt4
	QTTRANSDIR=${QTDATADIR}/translations
	QTEXAMPLESDIR=${QTDATADIR}/examples
	QTDEMOSDIR=${QTDATADIR}/demos
	QT_INSTALL_PREFIX=${EPREFIX}/usr/$(get_libdir)/qt4
	PLATFORM=$(qt_mkspecs_dir)

	unset QMAKESPEC
}

# @FUNCTION: standard_configure_options
# @DESCRIPTION:
# Sets up some standard configure options, like libdir (if necessary), whether
# debug info is wanted or not.
standard_configure_options() {
	local myconf=

	[[ $(get_libdir) != lib ]] && myconf+=" -L${EPREFIX}/usr/$(get_libdir)"

	# Disable visibility explicitly if gcc version isn't 4
	if [[ $(gcc-major-version) -lt 4 ]]; then
		myconf+=" -no-reduce-exports"
	fi

	# precompiled headers doesn't work on hardened, where the flag is masked.
	myconf+=" $(qt_use pch)"

	if use debug; then
		myconf+=" -debug"
	else
		myconf+=" -release"
	fi
	myconf+=" -no-separate-debug-info"

	use aqua && myconf+=" -no-framework"

	# ARCH is set on Gentoo. Qt now falls back to generic on an unsupported
	# $(tc-arch). Therefore we convert it to supported values.
	case "$(tc-arch)" in
		amd64|x64-*) myconf+=" -arch x86_64" ;;
		ppc-macos) myconf+=" -arch ppc" ;;
		ppc|ppc64|ppc-*) myconf+=" -arch powerpc" ;;
		sparc|sparc-*) myconf+=" -arch sparc" ;;
		x86-macos) myconf+=" -arch x86" ;;
		x86|x86-*) myconf+=" -arch i386" ;;
		alpha|arm|ia64|mips|s390|sparc) myconf+=" -arch $(tc-arch)" ;;
		hppa|sh) myconf+=" -arch generic" ;;
		*) die "$(tc-arch) is unsupported by this eclass. Please file a bug." ;;
	esac

	# 4.5: build everything but qt-xmlpatterns w/o exceptions
	# 4.6: exceptions USE flag
	local exceptions="-exceptions"
	case "${PV}" in
		4.5.*)
			[[ ${PN} == "qt-xmlpatterns" ]] || exceptions="-no-exceptions"
		;;
		*)
			has exceptions "${IUSE//+}" && exceptions="$(qt_use exceptions)"
		;;
	esac

	# note about -reduce-relocations:
	# That 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" on Solaris
	#   -- Daniel Vergien
	[[ ${CHOST} != *-solaris* ]] && myconf+=" -reduce-relocations"

	myconf+=" -platform $(qt_mkspecs_dir) -stl -verbose -largefile -confirm-license
		-prefix ${QTPREFIXDIR} -bindir ${QTBINDIR} -libdir ${QTLIBDIR}
		-datadir ${QTDATADIR} -docdir ${QTDOCDIR} -headerdir ${QTHEADERDIR}
		-plugindir ${QTPLUGINDIR} -sysconfdir ${QTSYSCONFDIR}
		-translationdir ${QTTRANSDIR} -examplesdir ${QTEXAMPLESDIR}
		-demosdir ${QTDEMOSDIR} -silent -fast -opensource
		${exceptions}
		-nomake examples -nomake demos"

	echo "${myconf}"
}

# @FUNCTION: build_directories
# @USAGE: < directories >
# @DESCRIPTION:
# Compiles the code in $QT4_TARGET_DIRECTORIES
build_directories() {
	for x in "$@"; do
		pushd "${S}"/${x} >/dev/null
		# avoid running over the maximum argument number, bug #299810
		{
			echo "${S}"/mkspecs/common/*.conf
			find "${S}" -name '*.pr[io]'
		} | xargs sed -i -e "s:\$\$\[QT_INSTALL_LIBS\]:${EPREFIX}/usr/$(get_libdir)/qt4:g" || die
		"${S}"/bin/qmake "LIBS+=-L${QTLIBDIR}" "CONFIG+=nostrip" || die "qmake failed"
		emake CC="$(tc-getCC)" \
			CXX="$(tc-getCXX)" \
			LINK="$(tc-getCXX)" || die "emake failed"
		popd >/dev/null
	done
}

# @FUNCTION: install_directories
# @USAGE: < directories >
# @DESCRIPTION:
# run emake install in the given directories, which are separated by spaces
install_directories() {
	for x in "$@"; do
		pushd "${S}"/${x} >/dev/null || die "Can't pushd ${S}/${x}"
		emake INSTALL_ROOT="${D}" install || die "emake install failed"
		popd >/dev/null || die "Can't popd from ${S}/${x}"
	done
}

# @ECLASS-VARIABLE: QCONFIG_ADD
# @DESCRIPTION:
# List options that need to be added to QT_CONFIG in qconfig.pri
: ${QCONFIG_ADD:=}

# @ECLASS-VARIABLE: QCONFIG_REMOVE
# @DESCRIPTION:
# List options that need to be removed from QT_CONFIG in qconfig.pri
: ${QCONFIG_REMOVE:=}

# @ECLASS-VARIABLE: QCONFIG_DEFINE
# @DESCRIPTION:
# List variables that should be defined at the top of QtCore/qconfig.h
: ${QCONFIG_DEFINE:=}

# @FUNCTION: install_qconfigs
# @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} >> "${T}"/${PN}-qconfig.pri
		done
		insinto ${QTDATADIR#${EPREFIX}}/mkspecs/gentoo
		doins "${T}"/${PN}-qconfig.pri || die "installing ${PN}-qconfig.pri failed"
	fi

	if [[ -n ${QCONFIG_DEFINE} ]]; then
		for x in ${QCONFIG_DEFINE}; do
			echo "#define ${x}" >> "${T}"/gentoo-${PN}-qconfig.h
		done
		insinto ${QTHEADERDIR#${EPREFIX}}/Gentoo
		doins "${T}"/gentoo-${PN}-qconfig.h || die "installing ${PN}-qconfig.h failed"
	fi
}

# @FUNCTION: generate_qconfigs
# @DESCRIPTION: Generates gentoo-specific configurations
generate_qconfigs() {
	if [[ -n ${QCONFIG_ADD} || -n ${QCONFIG_REMOVE} || -n ${QCONFIG_DEFINE} || ${CATEGORY}/${PN} == x11-libs/qt-core ]]; then
		local x qconfig_add qconfig_remove qconfig_new
		for x in "${ROOT}${QTDATADIR}"/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 "${ROOT}${QTDATADIR}"/mkspecs/gentoo/qconfig.pri ]]; then
			# start with the qconfig.pri that qt-core installed
			if ! cp "${ROOT}${QTDATADIR}"/mkspecs/gentoo/qconfig.pri \
				"${ROOT}${QTDATADIR}"/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}${QTDATADIR}"/mkspecs/qconfig.pri) ${qconfig_add}; do
					hasq ${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}${QTDATADIR}"/mkspecs/qconfig.pri; then
				eerror "Sed for QT_CONFIG failed"
				return 1
			fi

			# create Gentoo/qconfig.h
			if [[ ! -e ${ROOT}${QTHEADERDIR}/Gentoo ]]; then
				if ! mkdir -p "${ROOT}${QTHEADERDIR}"/Gentoo; then
					eerror "mkdir ${QTHEADERDIR}/Gentoo failed"
					return 1
				fi
			fi
			: > "${ROOT}${QTHEADERDIR}"/Gentoo/gentoo-qconfig.h
			for x in "${ROOT}${QTHEADERDIR}"/Gentoo/gentoo-*-qconfig.h; do
				[[ -f ${x} ]] || continue
				cat "${x}" >> "${ROOT}${QTHEADERDIR}"/Gentoo/gentoo-qconfig.h
			done
		else
			rm -f "${ROOT}${QTDATADIR}"/mkspecs/qconfig.pri
			rm -f "${ROOT}${QTHEADERDIR}"/Gentoo/gentoo-qconfig.h
			rmdir "${ROOT}${QTDATADIR}"/mkspecs \
				"${ROOT}${QTDATADIR}" \
				"${ROOT}${QTHEADERDIR}"/Gentoo \
				"${ROOT}${QTHEADERDIR}" 2>/dev/null
		fi
	fi
}

# @FUNCTION: qt4-build_pkg_postrm
# @DESCRIPTION: Generate configurations when the package is completely removed
qt4-build_pkg_postrm() {
	generate_qconfigs
}

# @FUNCTION: qt4-build_pkg_postinst
# @DESCRIPTION: Generate configuration, plus throws a message about possible
# breakages and proposed solutions.
qt4-build_pkg_postinst() {
	generate_qconfigs
}

# @FUNCTION: skip_qmake_build_patch
# @DESCRIPTION:
# Don't need to build qmake, as it's already installed from qt-core
skip_qmake_build_patch() {
	# Don't need to build qmake, as it's already installed from qt-core
	sed -i -e "s:if true:if false:g" "${S}"/configure || die "Sed failed"
}

# @FUNCTION: skip_project_generation_patch
# @DESCRIPTION:
# Exit the script early by throwing in an exit before all of the .pro files are scanned
skip_project_generation_patch() {
	# Exit the script early by throwing in an exit before all of the .pro files are scanned
	sed -e "s:echo \"Finding:exit 0\n\necho \"Finding:g" \
		-i "${S}"/configure || die "Sed failed"
}

# @FUNCTION: symlink_binaries_to_buildtree
# @DESCRIPTION:
# Symlink generated binaries to buildtree so they can be used during compilation
# time
symlink_binaries_to_buildtree() {
	for bin in qmake moc uic rcc; do
		ln -s ${QTBINDIR}/${bin} "${S}"/bin/ || die "Symlinking ${bin} to ${S}/bin failed."
	done
}

# @FUNCTION: fix_library_files
# @DESCRIPTION:
# Fixes the pathes in *.la, *.prl, *.pc, as they are wrong due to sandbox and
# moves the *.pc-files into the pkgconfig directory
fix_library_files() {
	for libfile in "${D}"/${QTLIBDIR}/{*.la,*.prl,pkgconfig/*.pc}; do
		if [[ -e ${libfile} ]]; then
			sed -i -e "s:${S}/lib:${QTLIBDIR}:g" ${libfile} || die "Sed on ${libfile} failed."
		fi
	done

	# pkgconfig files refer to WORKDIR/bin as the moc and uic locations.  Fix:
	for libfile in "${D}"/${QTLIBDIR}/pkgconfig/*.pc; do
		if [[ -e ${libfile} ]]; then
			sed -i -e "s:${S}/bin:${QTBINDIR}:g" ${libfile} || die "Sed failed"

		# Move .pc files into the pkgconfig directory
		dodir ${QTPCDIR#${EPREFIX}}
		mv ${libfile} "${D}"/${QTPCDIR}/ \
			|| die "Moving ${libfile} to ${D}/${QTPCDIR}/ failed."
		fi
	done

	# Don't install an empty directory
	rmdir "${D}"/${QTLIBDIR}/pkgconfig
}

# @FUNCTION: qt_use
# @USAGE: < flag > [ feature ] [ enableval ]
# @DESCRIPTION:
# This will echo "${enableval}-${feature}" if <flag> is enabled, or
# "-no-${feature} if the flag is disabled. If [feature] is not specified <flag>
# will be used for that. If [enableval] is not specified, it omits the
# assignment-part
qt_use() {
	local flag=$1
	local feature=$1
	local enableval=

	[[ -n $2 ]] && feature=$2
	[[ -n $3 ]] && enableval=-$3

	if use ${flag}; then
		echo "${enableval}-${feature}"
	else
		echo "-no-${feature}"
	fi
}

# @FUNCTION: qt_mkspecs_dir
# @RETURN: the specs-directory w/o path
# @DESCRIPTION:
# Allows us to define which mkspecs dir we want to use.
qt_mkspecs_dir() {
	# Allows us to define which mkspecs dir we want to use.
	local spec

	case ${CHOST} in
		*-freebsd*|*-dragonfly*)
			spec=freebsd ;;
		*-openbsd*)
			spec=openbsd ;;
		*-netbsd*)
			spec=netbsd ;;
		*-darwin*)
			if use aqua; then
				# mac with carbon/cocoa
				spec=macx
			else
				# darwin/mac with x11
				spec=darwin
			fi
			;;
		*-solaris*)
			spec=solaris ;;
		*-linux-*|*-linux)
			spec=linux ;;
		*)
			die "Unknown CHOST, no platform choosen."
	esac

	CXX=$(tc-getCXX)
	if [[ ${CXX} == *g++* ]]; then
		spec+=-g++
	elif [[ ${CXX} == *icpc* ]]; then
		spec+=-icc
	else
		die "Unknown compiler ${CXX}."
	fi
	if [[ -n ${LIBDIR/lib} ]]; then
		spec+=-${LIBDIR/lib}
	fi

	# Add -64 for 64bit profiles
	if use x64-freebsd ||
		use amd64-linux ||
		use x64-macos ||
		use x64-solaris ||
		use sparc64-solaris
	then
		spec+=-64
	fi

	echo "${spec}"
}

# @FUNCTION: qt_assistant_cleanup
# @RETURN: nothing
# @DESCRIPTION:
# Tries to clean up tools.pro for qt-assistant ebuilds
# Meant to be called in src_prepare
qt_assistant_cleanup() {
	# different versions (and branches...) may need different handling,
	# add a case if you need special handling
	case "${MY_PV_EXTRA}" in
		*kde-qt*)
			sed -e "/^[ \t]*porting/,/^[ \t]*win32.*activeqt$/d" \
				-e "/mac/,/^embedded.*makeqpf$/d" \
				-i tools/tools.pro || die "patching tools.pro failed"
		;;
		*)
			sed -e "/^[ \t]*porting/,/^[ \t]*win32.*activeqt$/d" \
				-e "/mac/,/^embedded.*makeqpf$/d" \
				-e "s/^\([ \t]*pixeltool\) /\1 qdoc3 /" \
				-i tools/tools.pro || die "patching tools.pro failed"
		;;
	esac
}

# @FUNCTION: qt_nolibx11
# @RETURN: nothing
# @DESCRIPTION:
# Ignore X11 tests for packages that don't need X libraries installed
qt_nolibx11() {
	einfo "removing X11 check to allow X-less compilation"
	sed -i "/unixtests\/compile.test.*config.tests\/x11\/xlib/,/fi$/d" "${S}"/configure ||
		die "x11 check sed failed"
}

EXPORT_FUNCTIONS pkg_setup src_unpack src_prepare src_configure src_compile src_install src_test pkg_postrm pkg_postinst