gentoo-x86/eclass/qt4-build.eclass

# Copyright 1999-2011 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/qt4-build.eclass,v 1.106 2011/12/21 22:47:35 pesa Exp $

# @ECLASS: qt4-build.eclass
# @MAINTAINER:
# Qt herd <qt@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=${PV/_/-}
MY_P=qt-everywhere-opensource-src-${MY_PV}

HOMEPAGE="http://qt.nokia.com/ http://qt-project.org/"
SRC_URI="http://get.qt.nokia.com/qt/source/${MY_P}.tar.gz"
LICENSE="|| ( LGPL-2.1 GPL-3 )"

IUSE="aqua debug pch"

[[ ${CATEGORY}/${PN} != x11-libs/qt-xmlpatterns ]] &&
[[ ${CATEGORY}/${PN} != x11-themes/qgtkstyle ]] &&
        IUSE+=" +exceptions"

if version_is_at_least 4.7.99999999; then
        IUSE+=" c++0x qpa"
fi

DEPEND="dev-util/pkgconfig"
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-declarative-${PV}
        !>x11-libs/qt-declarative-${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 unpack_p="${MY_P}"
        case "${PV}" in
                4.8.0_*)
                        unpack_p="qt-everywhere-opensource-src-${PV/_*}"
                ;;
        esac
        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+=" ${unpack_p}/${target}"
        done

        echo tar xzf "${DISTDIR}"/${MY_P}.tar.gz ${targets}
        tar xzf "${DISTDIR}"/${MY_P}.tar.gz ${targets} || die
        case "${PV}" in
                4.8.0_*)
                        mv ${WORKDIR}/qt-everywhere-opensource-src-${PV/_*} \
                                ${WORKDIR}/qt-everywhere-opensource-src-${MY_PV}
                ;;
        esac
}

# @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

        if version_is_at_least "4.7"; then
                # fix libX11 dependency on non X packages
                local nolibx11_pkgs="qt-core qt-dbus qt-script qt-sql qt-test qt-xmlpatterns"
                has ${PN} ${nolibx11_pkgs} && qt_nolibx11

                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
                skip_project_generation
                symlink_binaries_to_buildtree
        fi

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

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

        if use_if_iuse c++0x; then
                ewarn "You are about to build Qt4 using the C++11 standard. Even though"
                ewarn "this is an official standard, some of the reverse dependencies"
                ewarn "may fail to compile or link againt the Qt4 libraries. Before"
                ewarn "reporting a bug, make sure your bug is reproducible with c++0x"
                ewarn "disabled."
                append-flags -std=c++0x
        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/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 use_if_iuse 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_if_iuse qpa; then
                ewarn
                ewarn "The qpa useflag enables the Qt Platform Abstraction, formely"
                ewarn "known as Qt Lighthouse. If you are not sure what that is, then"
                ewarn "disable it before reporting any bugs related to this useflag."
                ewarn
                myconf+=" -qpa"
        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=""

        prepare_directories ${QT4_TARGET_DIRECTORIES}
}

# @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
        QTIMPORTDIR=${QTLIBDIR}/imports
        QTSYSCONFDIR=${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="-prefix ${QTPREFIXDIR} -bindir ${QTBINDIR} -libdir ${QTLIBDIR}
                -docdir ${QTDOCDIR} -headerdir ${QTHEADERDIR} -plugindir ${QTPLUGINDIR}
                -importdir ${QTIMPORTDIR} -datadir ${QTDATADIR} -translationdir ${QTTRANSDIR}
                -sysconfdir ${QTSYSCONFDIR} -examplesdir ${QTEXAMPLESDIR} -demosdir ${QTDEMOSDIR}
                -opensource -confirm-license -shared -fast -largefile -stl -verbose
                -platform $(qt_mkspecs_dir) -nomake examples -nomake demos"

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

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

        # exceptions USE flag
        local exceptions="-exceptions"
        in_iuse exceptions && exceptions="$(qt_use exceptions)"
        myconf+=" ${exceptions}"

        # disable RPATH on Qt >= 4.8 (bug 380415)
        version_is_at_least 4.8 && myconf+=" -no-rpath"

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

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

        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-*|sparc64-*)  myconf+=" -arch sparc" ;;
                x86-macos)                myconf+=" -arch x86" ;;
                x86|x86-*)                myconf+=" -arch i386" ;;
                alpha|arm|ia64|mips|s390) myconf+=" -arch $(tc-arch)" ;;
                hppa|sh)                  myconf+=" -arch generic" ;;
                *) die "$(tc-arch) is unsupported by this eclass. Please file a bug." ;;
        esac

        echo "${myconf}"
}

# @FUNCTION: prepare_directories
# @USAGE: < directories >
# @DESCRIPTION:
# Generates makefiles for the directories set in $QT4_TARGET_DIRECTORIES
prepare_directories() {
        for x in "$@"; do
                pushd "${S}"/${x} >/dev/null
                einfo "Running qmake in: ${x}"
                # avoid running over the maximum argument number, bug #299810
                {
                        echo "${S}"/mkspecs/common/*.conf
                        find "${S}" -name '*.pr[io]'
                } | xargs sed -i \
                        -e "s:\$\$\[QT_INSTALL_LIBS\]:${QTLIBDIR}:g" \
                        -e "s:\$\$\[QT_INSTALL_PLUGINS\]:${QTPLUGINDIR}:g" \
                        || die
                "${S}"/bin/qmake "LIBS+=-L${QTLIBDIR}" "CONFIG+=nostrip" || die "qmake failed"
                popd >/dev/null
        done
}


# @FUNCTION: build_directories
# @USAGE: < directories >
# @DESCRIPTION:
# Compiles the code in $QT4_TARGET_DIRECTORIES
build_directories() {
        for x in "$@"; do
                pushd "${S}"/${x} >/dev/null
                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
                                        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}${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
# @DESCRIPTION:
# Don't need to build qmake, as it's already installed from qt-core
skip_qmake_build() {
        # 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
# @DESCRIPTION:
# Exit the script early by throwing in an exit before all of the .pro files are scanned
skip_project_generation() {
        # 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 chosen"
        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().
# Since Qt 4.7.4 this function is a no-op.
qt_assistant_cleanup() {
        # apply patching to qt-assistant ebuilds only
        [[ ${PN} != "qt-assistant" ]] && return

        # no longer needed for 4.7.4 and later
        version_is_at_least "4.7.4" && return

        # 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