gentoo-x86/eclass/qt4-build.eclass

# Copyright 1999-2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/eclass/qt4-build.eclass,v 1.130 2012/05/22 13:41:59 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.

case ${EAPI} in
        2|3|4)  : ;;
        *)      die "qt4-build.eclass requires EAPI 2, 3 or 4." ;;
esac

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

if [[ ${PV} == *9999* ]]; then
        QT4_BUILD_TYPE="live"
        inherit git-2
else
        QT4_BUILD_TYPE="release"
fi

HOMEPAGE="http://qt-project.org/ http://qt.nokia.com/"
LICENSE="|| ( LGPL-2.1 GPL-3 )"

MY_PV=${PV/_/-}
MY_P=qt-everywhere-opensource-src-${MY_PV}

case ${QT4_BUILD_TYPE} in
        live)
                EGIT_REPO_URI="git://gitorious.org/qt/qt.git
                        https://git.gitorious.org/qt/qt.git"
                EGIT_BRANCH="${PV%.9999}"
                ;;
        release)
                if version_is_at_least 4.8.1; then
                        SRC_URI="http://releases.qt-project.org/qt4/source/${MY_P}.tar.gz"
                else
                        SRC_URI="http://get.qt.nokia.com/qt/source/${MY_P}.tar.gz"
                fi
                ;;
esac

IUSE="aqua debug pch"
if [[ ${CATEGORY}/${PN} != x11-libs/qt-xmlpatterns ]]; then
        IUSE+=" +exceptions"
fi
if version_is_at_least 4.8; then
        IUSE+=" c++0x qpa"
fi

DEPEND="virtual/pkgconfig"
if [[ ${QT4_BUILD_TYPE} == live ]]; then
        DEPEND+=" dev-lang/perl"
fi

RDEPEND="
        !<x11-libs/qt-assistant-${PV}
        !>x11-libs/qt-assistant-${PV}-r9999
        !<x11-libs/qt-bearer-${PV}
        !>x11-libs/qt-bearer-${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-openvg-${PV}
        !>x11-libs/qt-openvg-${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 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
                        eerror "Sanity check to keep you from breaking your system:"
                        eerror "  Downgrading Qt is completely unsupported and will break your system!"
                        eerror
                        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 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 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

        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

        case ${QT4_BUILD_TYPE} in
                live)
                        git-2_src_unpack
                        ;;
                release)
                        local tarball="${MY_P}.tar.gz" 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

                        ebegin "Unpacking parts of ${tarball}:" ${targets//${MY_P}\/}
                        tar -xzf "${DISTDIR}/${tarball}" ${targets}
                        eend $? || die "failed to unpack"
                        ;;
        esac
}

# @ECLASS-VARIABLE: PATCHES
# @DEFAULT_UNSET
# @DESCRIPTION:
# PATCHES array variable containing all various patches to be applied.
# This variable is expected to be defined in global scope of ebuild.
# Make sure to specify the full path. This variable is utilised in
# src_unpack/src_prepare phase, based on EAPI.
#
# @CODE
#   PATCHES=( "${FILESDIR}/mypatch.patch"
#             "${FILESDIR}/patches_folder/" )
# @CODE

# @FUNCTION: qt4-build_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 /etc/make.conf.
qt4-build_src_prepare() {
        setqtenv

        if [[ ${QT4_BUILD_TYPE} == live ]]; then
                QTDIR="." ./bin/syncqt || die "syncqt 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
        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 or -O3 but -O1 works
                # Bug 373061
                replace-flags -O[23] -O1
        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
                echo
                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."
                echo
                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 mkspecs/common/g++.conf || die
        fi

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

        # Respect CC, CXX, {C,CXX,LD}FLAGS in .qmake.cache
        sed -e "/^SYSTEM_VARIABLES=/i \
                CC='$(tc-getCC)'\n\
                CXX='$(tc-getCXX)'\n\
                CFLAGS='${CFLAGS}'\n\
                CXXFLAGS='${CXXFLAGS}'\n\
                LDFLAGS='${LDFLAGS}'\n" \
                -i configure \
                || die "sed SYSTEM_VARIABLES 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: \"QT_BUILD_TREE=: \
                        '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"

        if ! version_is_at_least 4.8; then
                # Strip predefined CFLAGS from mkspecs (bugs 312689 and 352778)
                sed -i -e '/^QMAKE_CFLAGS_RELEASE/s:+=.*:+=:' mkspecs/common/g++.conf || die
        fi

        # Bug 172219
        sed -e 's:/X11R6/:/:' -i mkspecs/$(qt_mkspecs_dir)/qmake.conf || die

        if [[ ${CHOST} == *-darwin* ]]; then
                # Set FLAGS *and* remove -arch, since our gcc-apple is multilib
                # crippled (by design) :/
                local mac_gpp_conf=
                if [[ -f mkspecs/common/mac-g++.conf ]]; then
                        # qt < 4.8 has mac-g++.conf
                        mac_gpp_conf="mkspecs/common/mac-g++.conf"
                elif [[ -f mkspecs/common/g++-macx.conf ]]; then
                        # qt >= 4.8 has g++-macx.conf
                        mac_gpp_conf="mkspecs/common/g++-macx.conf"
                else
                        die "no known conf file for mac found"
                fi
                sed \
                        -e "s:QMAKE_CFLAGS_RELEASE.*=.*:QMAKE_CFLAGS_RELEASE=${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 ${mac_gpp_conf} \
                        || die "sed ${mac_gpp_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.
                local mac_gcc_confs="${mac_gpp_conf}"
                if [[ -f mkspecs/common/gcc-base-macx.conf ]]; then
                        mac_gcc_confs+=" mkspecs/common/gcc-base-macx.conf"
                fi
                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 ${mac_gcc_confs} \
                        || die "sed -arch/-Xarch 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 ${mac_gpp_conf} \
                                || die "sed deployment target 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:\(LIBS += -liconv\)|\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/$(qt_mkspecs_dir)/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/=.*$/=/' \
                mkspecs/$(qt_mkspecs_dir)/qmake.conf || die

        base_src_prepare
}

# @FUNCTION: qt4-build_src_configure
# @DESCRIPTION:
# Default configure phase
qt4-build_src_configure() {
        setqtenv

        local conf="
                -prefix ${QTPREFIXDIR}
                -bindir ${QTBINDIR}
                -libdir ${QTLIBDIR}
                -docdir ${QTDOCDIR}
                -headerdir ${QTHEADERDIR}
                -plugindir ${QTPLUGINDIR}
                $(version_is_at_least 4.7 && echo -importdir ${QTIMPORTDIR})
                -datadir ${QTDATADIR}
                -translationdir ${QTTRANSDIR}
                -sysconfdir ${QTSYSCONFDIR}
                -examplesdir ${QTEXAMPLESDIR}
                -demosdir ${QTDEMOSDIR}
                -opensource -confirm-license
                -shared -fast -largefile -stl -verbose
                -nomake examples -nomake demos"

        # 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-*)              conf+=" -arch x86_64" ;;
                ppc-macos)                conf+=" -arch ppc" ;;
                ppc|ppc64|ppc-*)          conf+=" -arch powerpc" ;;
                sparc|sparc-*|sparc64-*)  conf+=" -arch sparc" ;;
                x86-macos)                conf+=" -arch x86" ;;
                x86|x86-*)                conf+=" -arch i386" ;;
                alpha|arm|ia64|mips|s390) conf+=" -arch $(tc-arch)" ;;
                hppa|sh)                  conf+=" -arch generic" ;;
                *) die "$(tc-arch) is unsupported by this eclass. Please file a bug." ;;
        esac

        conf+=" -platform $(qt_mkspecs_dir)"

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

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

        # exceptions USE flag
        conf+=" $(in_iuse exceptions && qt_use exceptions || echo -exceptions)"

        # disable rpath on Qt >= 4.8 (bug 380415)
        # but leave it enabled on prefix (bug 417169)
        version_is_at_least 4.8 && use !prefix && conf+=" -no-rpath"

        # precompiled headers don't work on hardened, where the flag is masked
        conf+=" $(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* ]] && conf+=" -reduce-relocations"

        # 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
                conf+=" -liconv"
        fi

        if use_if_iuse glib; then
                local glibflags="$(pkg-config --cflags --libs glib-2.0 gthread-2.0)"
                # avoid the -pthread argument
                conf+=" ${glibflags//-pthread}"
                unset glibflags
        fi

        if use_if_iuse qpa; then
                echo
                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."
                echo
                conf+=" -qpa"
        fi

        if use aqua; then
                # On (snow) leopard use the new (frameworked) cocoa code.
                if [[ ${CHOST##*-darwin} -ge 9 ]]; then
                        conf+=" -cocoa -framework"
                        # We need the source's headers, not the installed ones.
                        conf+=" -I${S}/include"
                        # Add hint for the framework location.
                        conf+=" -F${QTLIBDIR}"

                        # 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 || die
                        fi
                else
                        conf+=" -no-framework"
                fi
        else
                # freetype2 include dir is non-standard, thus pass it to configure
                conf+=" $(pkg-config --cflags-only-I freetype2)"
        fi

        conf+=" ${myconf}"
        myconf=

        echo ./configure ${conf}
        ./configure ${conf} || die "./configure failed"

        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() {
        # QtMultimedia does not have any test suite (bug #332299)
        [[ ${PN} == qt-multimedia ]] && return

        for dir in ${QT4_TARGET_DIRECTORIES}; do
                emake -j1 check -C ${dir}
        done
}

# @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 aqua && [[ ${CHOST##*-darwin} -ge 9 ]]; then
                local frw dest f h rdir
                # Some packages tend to include <Qt/...>
                dodir "${QTHEADERDIR#${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=${QTHEADERDIR}
                h=${QTLIBDIR}
                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 "${D}${QTLIBDIR}"/*.framework; do
                        [[ -e "${frw}"/Headers ]] || continue
                        f=$(basename ${frw})
                        dest="${QTHEADERDIR#${EPREFIX}}"/${f%.framework}
                        dosym "${rdir}"/${f}/Headers "${dest}"

                        # Link normal headers as well.
                        for hdr in "${D}/${QTLIBDIR}/${f}"/Headers/*; do
                                h=$(basename ${hdr})
                                dosym "../${rdir}"/${f}/Headers/${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} -type f -name '*.la' -print0 | xargs -0 rm -f
}

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

        PLATFORM=$(qt_mkspecs_dir)
        unset QMAKESPEC

        export XDG_CONFIG_HOME="${T}"
}

# @FUNCTION: prepare_directories
# @USAGE: < directories >
# @INTERNAL
# @DESCRIPTION:
# Generates Makefiles for the given list of directories.
prepare_directories() {
        for x in "$@"; do
                pushd "${S}"/${x} >/dev/null || die
                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 || die
        done
}


# @FUNCTION: build_directories
# @USAGE: < directories >
# @INTERNAL
# @DESCRIPTION:
# Compiles the code in the given list of directories.
build_directories() {
        for x in "$@"; do
                pushd "${S}"/${x} >/dev/null || die
                emake CC="$(tc-getCC)" \
                        CXX="$(tc-getCXX)" \
                        LINK="$(tc-getCXX)" || die "emake failed"
                popd >/dev/null || die
        done
}

# @FUNCTION: install_directories
# @USAGE: < directories >
# @INTERNAL
# @DESCRIPTION:
# Runs emake install in the given directories, which are separated by spaces.
install_directories() {
        for x in "$@"; do
                pushd "${S}"/${x} >/dev/null || die
                emake INSTALL_ROOT="${D}" install || die "emake install failed"
                popd >/dev/null || die
        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
# @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} >> "${T}"/${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
# @INTERNAL
# @DESCRIPTION:
# Generates gentoo-specific qconfig.{h,pri}.
generate_qconfigs() {
        if [[ -n ${QCONFIG_ADD} || -n ${QCONFIG_REMOVE} || -n ${QCONFIG_DEFINE} || ${PN} == qt-core ]]; then
                local x qconfig_add qconfig_remove qconfig_new
                for x in "${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:
# Regenerate configuration when the package is completely removed.
qt4-build_pkg_postrm() {
        generate_qconfigs
}

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

# @FUNCTION: skip_qmake_build
# @INTERNAL
# @DESCRIPTION:
# Patches configure to skip qmake compilation, as it's already installed by qt-core.
skip_qmake_build() {
        sed -i -e "s:if true:if false:g" "${S}"/configure || die
}

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

# @FUNCTION: symlink_binaries_to_buildtree
# @INTERNAL
# @DESCRIPTION:
# Symlinks 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
# @INTERNAL
# @DESCRIPTION:
# Fixes the paths in *.la, *.prl, *.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 "${D}"/${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
        for libfile in "${D}"/${QTLIBDIR}/pkgconfig/*.pc; do
                if [[ -e ${libfile} ]]; then
                        sed -i -e "s:${S}/bin:${QTBINDIR}:g" ${libfile} || die "sed on ${libfile} 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-${feature}" if it's disabled. If [feature] is not specified, <flag>
# will be used for that. If [enableval] is not specified, it omits the
# "-${enableval}" part.
qt_use() {
        use "$1" && echo "${3:+-$3}-${2:-$1}" || echo "-no-${2:-$1}"
}

# @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() {
        local spec=

        case "${CHOST}" in
                *-freebsd*|*-dragonfly*)
                        spec=freebsd ;;
                *-openbsd*)
                        spec=openbsd ;;
                *-netbsd*)
                        spec=netbsd ;;
                *-darwin*)
                        if use aqua; then
                                # mac with carbon/cocoa
                                spec=macx
                        else
                                # darwin/mac with x11
                                spec=darwin
                        fi
                        ;;
                *-solaris*)
                        spec=solaris ;;
                *-linux-*|*-linux)
                        spec=linux ;;
                *)
                        die "${FUNCNAME}(): Unknown CHOST '${CHOST}'" ;;
        esac

        case "$(tc-getCXX)" in
                *g++*)
                        spec+=-g++ ;;
                *icpc*)
                        spec+=-icc ;;
                *)
                        die "${FUNCNAME}(): Unknown compiler '$(tc-getCXX)'" ;;
        esac

        # 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
# @INTERNAL
# @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
# @INTERNAL
# @DESCRIPTION:
# Ignore X11 tests for packages that don't need X libraries installed.
qt_nolibx11() {
        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