commit:     28220ab69ae4359ea742a89dea2c127d719b70d0
Author:     Aric Belsito <lluixhi <AT> gmail <DOT> com>
AuthorDate: Wed Nov 29 19:59:23 2017 +0000
Commit:     Aric Belsito <lluixhi <AT> gmail <DOT> com>
CommitDate: Wed Nov 29 19:59:23 2017 +0000
URL:        https://gitweb.gentoo.org/proj/musl.git/commit/?id=28220ab6

eclass: disable gold linker in qt5

 eclass/qt5-build.eclass | 808 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 808 insertions(+)

diff --git a/eclass/qt5-build.eclass b/eclass/qt5-build.eclass
new file mode 100644
index 0000000..82a2aaf
--- /dev/null
+++ b/eclass/qt5-build.eclass
@@ -0,0 +1,808 @@
+# Copyright 1999-2017 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+# @ECLASS: qt5-build.eclass
+# @MAINTAINER:
+# [email protected]
+# @AUTHOR:
+# Davide Pesavento <[email protected]>
+# @SUPPORTED_EAPIS: 6
+# @BLURB: Eclass for Qt5 split ebuilds.
+# @DESCRIPTION:
+# This eclass contains various functions that are used when building Qt5.
+# Requires EAPI 6.
+
+if [[ ${CATEGORY} != dev-qt ]]; then
+       die "qt5-build.eclass is only to be used for building Qt 5."
+fi
+
+case ${EAPI} in
+       6)      : ;;
+       *)      die "qt5-build.eclass: unsupported EAPI=${EAPI:-0}" ;;
+esac
+
+# @ECLASS-VARIABLE: QT5_MODULE
+# @PRE_INHERIT
+# @DESCRIPTION:
+# The upstream name of the module this package belongs to. Used for
+# SRC_URI and EGIT_REPO_URI. Must be set before inheriting the eclass.
+: ${QT5_MODULE:=${PN}}
+
+# @ECLASS-VARIABLE: QT5_TARGET_SUBDIRS
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# Array variable containing the source directories that should be built.
+# All paths must be relative to ${S}.
+
+# @ECLASS-VARIABLE: QT5_GENTOO_CONFIG
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# Array of <useflag:feature:macro> triplets that are evaluated in src_install
+# to generate the per-package list of enabled QT_CONFIG features and macro
+# definitions, which are then merged together with all other Qt5 packages
+# installed on the system to obtain the global qconfig.{h,pri} files.
+
+# @ECLASS-VARIABLE: VIRTUALX_REQUIRED
+# @DESCRIPTION:
+# For proper description see virtualx.eclass man page.
+# Here we redefine default value to be manual, if your package needs virtualx
+# for tests you should proceed with setting VIRTUALX_REQUIRED=test.
+: ${VIRTUALX_REQUIRED:=manual}
+
+inherit estack flag-o-matic ltprune toolchain-funcs versionator virtualx
+
+HOMEPAGE="https://www.qt.io/";
+LICENSE="|| ( GPL-2 GPL-3 LGPL-3 ) FDL-1.3"
+SLOT=5/$(get_version_component_range 1-2)
+
+QT5_MINOR_VERSION=$(get_version_component_range 2)
+QT5_PATCH_VERSION=$(get_version_component_range 3)
+readonly QT5_MINOR_VERSION QT5_PATCH_VERSION
+
+case ${PV} in
+       5.9999)
+               # git dev branch
+               QT5_BUILD_TYPE="live"
+               EGIT_BRANCH="dev"
+               ;;
+       5.?.9999|5.??.9999|5.???.9999)
+               # git stable branch
+               QT5_BUILD_TYPE="live"
+               EGIT_BRANCH=${PV%.9999}
+               ;;
+       *_alpha*|*_beta*|*_rc*)
+               # development release
+               QT5_BUILD_TYPE="release"
+               MY_P=${QT5_MODULE}-opensource-src-${PV/_/-}
+               
SRC_URI="https://download.qt.io/development_releases/qt/${PV%.*}/${PV/_/-}/submodules/${MY_P}.tar.xz";
+               S=${WORKDIR}/${MY_P}
+               ;;
+       *)
+               # official stable release
+               QT5_BUILD_TYPE="release"
+               MY_P=${QT5_MODULE}-opensource-src-${PV}
+               
SRC_URI="https://download.qt.io/official_releases/qt/${PV%.*}/${PV}/submodules/${MY_P}.tar.xz";
+               S=${WORKDIR}/${MY_P}
+               ;;
+esac
+readonly QT5_BUILD_TYPE
+
+EGIT_REPO_URI=(
+       "https://code.qt.io/qt/${QT5_MODULE}.git";
+       "https://github.com/qt/${QT5_MODULE}.git";
+)
+[[ ${QT5_BUILD_TYPE} == live ]] && inherit git-r3
+
+# @ECLASS-VARIABLE: QT5_BUILD_DIR
+# @OUTPUT_VARIABLE
+# @DESCRIPTION:
+# Build directory for out-of-source builds.
+case ${QT5_BUILD_TYPE} in
+       live)    : ${QT5_BUILD_DIR:=${S}_build} ;;
+       release) : ${QT5_BUILD_DIR:=${S}} ;; # workaround for bug 497312
+esac
+
+IUSE="debug test"
+
+[[ ${PN} == qtwebkit ]] && RESTRICT+=" mirror" # bug 524584
+[[ ${QT5_BUILD_TYPE} == release ]] && RESTRICT+=" test" # bug 457182
+
+DEPEND="
+       dev-lang/perl
+       virtual/pkgconfig
+"
+if [[ (${PN} != qttest && ${PN} != qtwebkit) || (${PN} == qtwebkit && 
${QT5_MINOR_VERSION} -lt 9) ]]; then
+       DEPEND+=" test? ( ~dev-qt/qttest-${PV} )"
+fi
+RDEPEND="
+       dev-qt/qtchooser
+"
+
+
+######  Phase functions  ######
+
+EXPORT_FUNCTIONS src_unpack src_prepare src_configure src_compile src_install 
src_test pkg_postinst pkg_postrm
+
+# @FUNCTION: qt5-build_src_unpack
+# @DESCRIPTION:
+# Unpacks the sources.
+qt5-build_src_unpack() {
+       if tc-is-gcc; then
+               local min_gcc4_minor_version=7
+               if [[ $(gcc-major-version) -lt 4 ]] || \
+                  [[ $(gcc-major-version) -eq 4 && $(gcc-minor-version) -lt 
${min_gcc4_minor_version} ]]; then
+                       eerror "GCC version 4.${min_gcc4_minor_version} or 
later is required to build this package"
+                       die "GCC 4.${min_gcc4_minor_version} or later required"
+               fi
+       fi
+
+       # bug 307861
+       if [[ ${PN} == qtwebengine || ${PN} == qtwebkit ]]; then
+               eshopts_push -s extglob
+               if is-flagq '-g?(gdb)?([1-9])'; then
+                       ewarn
+                       ewarn "You have enabled debug info (probably have -g or 
-ggdb in your CFLAGS/CXXFLAGS)."
+                       ewarn "You may experience really long compilation times 
and/or increased memory usage."
+                       ewarn "If compilation fails, please try removing 
-g/-ggdb before reporting a bug."
+                       ewarn
+               fi
+               eshopts_pop
+       fi
+
+       case ${QT5_BUILD_TYPE} in
+               live)    git-r3_src_unpack ;;
+               release) default ;;
+       esac
+}
+
+# @FUNCTION: qt5-build_src_prepare
+# @DESCRIPTION:
+# Prepares the environment and patches the sources if necessary.
+qt5-build_src_prepare() {
+       qt5_prepare_env
+
+       if [[ ${QT5_MODULE} == qtbase ]]; then
+               qt5_symlink_tools_to_build_dir
+
+               # Avoid unnecessary qmake recompilations
+               if [[ ${QT5_MINOR_VERSION} -ge 8 ]]; then
+                       sed -i -e "/Creating qmake/i if [ '!' -e 
\"\$outpath/bin/qmake\" ]; then" \
+                               -e '/echo "Done."/a fi' \
+                               configure || die "sed failed (skip qmake 
bootstrap)"
+               else
+                       sed -i -re "s|^if true;.*(\[ 
'\!').*(\"\\\$outpath/bin/qmake\".*)|if \1 -e \2 then|" \
+                               configure || die "sed failed (skip qmake 
bootstrap)"
+               fi
+
+               # Respect CC, CXX, *FLAGS, MAKEOPTS and EXTRA_EMAKE when 
bootstrapping qmake
+               sed -i -e "/outpath\/qmake\".*\"\$MAKE\")/ s:): \
+                       ${MAKEOPTS} ${EXTRA_EMAKE} 'CC=$(tc-getCC)' 
'CXX=$(tc-getCXX)' \
+                       'QMAKE_CFLAGS=${CFLAGS}' 'QMAKE_CXXFLAGS=${CXXFLAGS}' 
'QMAKE_LFLAGS=${LDFLAGS}'&:" \
+                       -e 
's/\(setBootstrapVariable\s\+\|EXTRA_C\(XX\)\?FLAGS=.*\)QMAKE_C\(XX\)\?FLAGS_\(DEBUG\|RELEASE\).*/:/'
 \
+                       configure || die "sed failed (respect env for qmake 
build)"
+               sed -i -e '/^CPPFLAGS\s*=/ s/-g //' \
+                       qmake/Makefile.unix || die "sed failed (CPPFLAGS for 
qmake build)"
+
+               # Respect CXX in bsymbolic_functions, fvisibility, precomp, and 
a few other tests
+               sed -i -e "/^QMAKE_CONF_COMPILER=/ s:=.*:=\"$(tc-getCXX)\":" \
+                       configure || die "sed failed (QMAKE_CONF_COMPILER)"
+
+               if [[ ${QT5_MINOR_VERSION} -le 7 ]]; then
+                       # Respect toolchain and flags in config.tests
+                       find config.tests/unix -name '*.test' -type f -execdir \
+                               sed -i -e 's/-nocache //' '{}' + || die
+               fi
+
+               # Don't inject -msse/-mavx/... into CXXFLAGS when detecting
+               # compiler support for extended instruction sets (bug 552942)
+               find config.tests/common -name '*.pro' -type f -execdir \
+                       sed -i -e '/QMAKE_CXXFLAGS\s*+=/ d' '{}' + || die
+
+               # Don't add -O3 to CXXFLAGS (bug 549140)
+               sed -i -e '/CONFIG\s*+=/ s/optimize_full//' \
+                       src/{corelib/corelib,gui/gui}.pro || die "sed failed 
(optimize_full)"
+       fi
+
+       default
+}
+
+# @FUNCTION: qt5-build_src_configure
+# @DESCRIPTION:
+# Runs qmake in the target directories. For packages
+# in qtbase, ./configure is also run before qmake.
+qt5-build_src_configure() {
+       if [[ ${QT5_MODULE} == qtbase ]]; then
+               qt5_base_configure
+       fi
+
+       qt5_foreach_target_subdir qt5_qmake
+}
+
+# @FUNCTION: qt5-build_src_compile
+# @DESCRIPTION:
+# Runs emake in the target directories.
+qt5-build_src_compile() {
+       qt5_foreach_target_subdir emake
+}
+
+# @FUNCTION: qt5-build_src_test
+# @DESCRIPTION:
+# Runs tests in the target directories.
+qt5-build_src_test() {
+       # disable broken cmake tests (bug 474004)
+       local myqmakeargs=("${myqmakeargs[@]}" -after SUBDIRS-=cmake 
SUBDIRS-=installed_cmake)
+
+       qt5_foreach_target_subdir qt5_qmake
+       qt5_foreach_target_subdir emake
+
+       # create a custom testrunner script that correctly sets
+       # LD_LIBRARY_PATH before executing the given test
+       local testrunner=${QT5_BUILD_DIR}/gentoo-testrunner
+       cat > "${testrunner}" <<-_EOF_ || die
+       #!/bin/sh
+       export LD_LIBRARY_PATH="${QT5_BUILD_DIR}/lib:${QT5_LIBDIR}"
+       "\$@"
+       _EOF_
+       chmod +x "${testrunner}"
+
+       set -- qt5_foreach_target_subdir emake TESTRUNNER="'${testrunner}'" 
check
+       if [[ ${VIRTUALX_REQUIRED} == test ]]; then
+               virtx "$@"
+       else
+               "$@"
+       fi
+}
+
+# @FUNCTION: qt5-build_src_install
+# @DESCRIPTION:
+# Runs emake install in the target directories.
+qt5-build_src_install() {
+       qt5_foreach_target_subdir emake INSTALL_ROOT="${D}" install
+
+       if [[ ${PN} == qtcore ]]; then
+               pushd "${QT5_BUILD_DIR}" >/dev/null || die
+
+               set -- emake INSTALL_ROOT="${D}" \
+                       sub-qmake-qmake-aux-pro-install_subtargets \
+                       install_{syncqt,mkspecs}
+
+               einfo "Running $*"
+               "$@"
+
+               popd >/dev/null || die
+
+               docompress -x "${QT5_DOCDIR#${EPREFIX}}"/global
+
+               # install an empty Gentoo/gentoo-qconfig.h in ${D}
+               # so that it's placed under package manager control
+               > "${T}"/gentoo-qconfig.h
+               (
+                       insinto "${QT5_HEADERDIR#${EPREFIX}}"/Gentoo
+                       doins "${T}"/gentoo-qconfig.h
+               )
+
+               # include gentoo-qconfig.h at the beginning of QtCore/qconfig.h
+               sed -i -e '1i #include <Gentoo/gentoo-qconfig.h>\n' \
+                       "${D}${QT5_HEADERDIR}"/QtCore/qconfig.h \
+                       || die "sed failed (qconfig.h)"
+
+               # install qtchooser configuration file
+               cat > "${T}/qt5-${CHOST}.conf" <<-_EOF_ || die
+                       ${QT5_BINDIR}
+                       ${QT5_LIBDIR}
+               _EOF_
+
+               (
+                       insinto /etc/xdg/qtchooser
+                       doins "${T}/qt5-${CHOST}.conf"
+               )
+
+               # convenience symlinks
+               dosym qt5-"${CHOST}".conf /etc/xdg/qtchooser/5.conf
+               dosym qt5-"${CHOST}".conf /etc/xdg/qtchooser/qt5.conf
+       fi
+
+       qt5_install_module_qconfigs
+       prune_libtool_files
+}
+
+# @FUNCTION: qt5-build_pkg_postinst
+# @DESCRIPTION:
+# Regenerate configuration after installation or upgrade/downgrade.
+qt5-build_pkg_postinst() {
+       qt5_regenerate_global_qconfigs
+}
+
+# @FUNCTION: qt5-build_pkg_postrm
+# @DESCRIPTION:
+# Regenerate configuration when a module is completely removed.
+qt5-build_pkg_postrm() {
+       if [[ -z ${REPLACED_BY_VERSION} && ${PN} != qtcore ]]; then
+               qt5_regenerate_global_qconfigs
+       fi
+}
+
+
+######  Public helpers  ######
+
+# @FUNCTION: qt_use
+# @USAGE: <flag> [feature] [enableval]
+# @DESCRIPTION:
+# <flag> is the name of a flag in IUSE.
+#
+# Outputs "-${enableval}-${feature}" if <flag> is enabled, "-no-${feature}"
+# otherwise. If [feature] is not specified, <flag> is used in its place.
+# If [enableval] is not specified, the "-${enableval}" prefix is omitted.
+qt_use() {
+       [[ $# -ge 1 ]] || die "${FUNCNAME}() requires at least one argument"
+
+       usex "$1" "${3:+-$3}-${2:-$1}" "-no-${2:-$1}"
+}
+
+# @FUNCTION: qt_use_compile_test
+# @USAGE: <flag> [config]
+# @DESCRIPTION:
+# <flag> is the name of a flag in IUSE.
+# [config] is the argument of qtCompileTest, defaults to <flag>.
+#
+# This function is useful to disable optional dependencies that are checked
+# at qmake-time using the qtCompileTest() function. If <flag> is disabled,
+# the compile test is skipped and the dependency is assumed to be unavailable,
+# i.e. the corresponding feature will be disabled. Note that all invocations
+# of this function must happen before calling qt5-build_src_configure.
+qt_use_compile_test() {
+       [[ $# -ge 1 ]] || die "${FUNCNAME}() requires at least one argument"
+
+       if ! use "$1"; then
+               mkdir -p "${QT5_BUILD_DIR}" || die
+               echo "CONFIG += done_config_${2:-$1}" >> 
"${QT5_BUILD_DIR}"/.qmake.cache || die
+       fi
+}
+
+# @FUNCTION: qt_use_disable_config
+# @USAGE: <flag> <config> <files...>
+# @DESCRIPTION:
+# <flag> is the name of a flag in IUSE.
+# <config> is the (lowercase) name of a Qt5 config entry.
+# <files...> is a list of one or more qmake project files.
+#
+# This function patches <files> to treat <config> as disabled
+# when <flag> is disabled, otherwise it does nothing.
+# This can be useful to avoid an automagic dependency when the config entry
+# is enabled on the system but the corresponding USE flag is disabled.
+qt_use_disable_config() {
+       [[ $# -ge 3 ]] || die "${FUNCNAME}() requires at least three arguments"
+
+       local flag=$1
+       local config=$2
+       shift 2
+
+       if ! use "${flag}"; then
+               echo "$@" | xargs sed -i -e "s/qtConfig(${config})/false/g" || 
die
+       fi
+}
+
+# @FUNCTION: qt_use_disable_mod
+# @USAGE: <flag> <module> <files...>
+# @DESCRIPTION:
+# <flag> is the name of a flag in IUSE.
+# <module> is the (lowercase) name of a Qt5 module.
+# <files...> is a list of one or more qmake project files.
+#
+# This function patches <files> to treat <module> as not installed
+# when <flag> is disabled, otherwise it does nothing.
+# This can be useful to avoid an automagic dependency when the module
+# is present on the system but the corresponding USE flag is disabled.
+qt_use_disable_mod() {
+       [[ $# -ge 3 ]] || die "${FUNCNAME}() requires at least three arguments"
+
+       local flag=$1
+       local module=$2
+       shift 2
+
+       if ! use "${flag}"; then
+               echo "$@" | xargs sed -i -e "s/qtHaveModule(${module})/false/g" 
|| die
+       fi
+}
+
+
+######  Internal functions  ######
+
+# @FUNCTION: qt5_prepare_env
+# @INTERNAL
+# @DESCRIPTION:
+# Prepares the environment for building Qt.
+qt5_prepare_env() {
+       # setup installation directories
+       # note: keep paths in sync with qmake-utils.eclass
+       QT5_PREFIX=${EPREFIX}/usr
+       QT5_HEADERDIR=${QT5_PREFIX}/include/qt5
+       QT5_LIBDIR=${QT5_PREFIX}/$(get_libdir)
+       QT5_ARCHDATADIR=${QT5_PREFIX}/$(get_libdir)/qt5
+       QT5_BINDIR=${QT5_ARCHDATADIR}/bin
+       QT5_PLUGINDIR=${QT5_ARCHDATADIR}/plugins
+       QT5_LIBEXECDIR=${QT5_ARCHDATADIR}/libexec
+       QT5_IMPORTDIR=${QT5_ARCHDATADIR}/imports
+       QT5_QMLDIR=${QT5_ARCHDATADIR}/qml
+       QT5_DATADIR=${QT5_PREFIX}/share/qt5
+       QT5_DOCDIR=${QT5_PREFIX}/share/doc/qt-${PV}
+       QT5_TRANSLATIONDIR=${QT5_DATADIR}/translations
+       QT5_EXAMPLESDIR=${QT5_DATADIR}/examples
+       QT5_TESTSDIR=${QT5_DATADIR}/tests
+       QT5_SYSCONFDIR=${EPREFIX}/etc/xdg
+       readonly QT5_PREFIX QT5_HEADERDIR QT5_LIBDIR QT5_ARCHDATADIR \
+               QT5_BINDIR QT5_PLUGINDIR QT5_LIBEXECDIR QT5_IMPORTDIR \
+               QT5_QMLDIR QT5_DATADIR QT5_DOCDIR QT5_TRANSLATIONDIR \
+               QT5_EXAMPLESDIR QT5_TESTSDIR QT5_SYSCONFDIR
+
+       if [[ ${QT5_MODULE} == qtbase ]]; then
+               # see mkspecs/features/qt_config.prf
+               export 
QMAKEMODULES="${QT5_BUILD_DIR}/mkspecs/modules:${S}/mkspecs/modules:${QT5_ARCHDATADIR}/mkspecs/modules"
+       fi
+}
+
+# @FUNCTION: qt5_foreach_target_subdir
+# @INTERNAL
+# @DESCRIPTION:
+# Executes the command given as argument from inside each directory
+# listed in QT5_TARGET_SUBDIRS. Handles autotests subdirs automatically.
+qt5_foreach_target_subdir() {
+       [[ -z ${QT5_TARGET_SUBDIRS[@]} ]] && QT5_TARGET_SUBDIRS=("")
+
+       local subdir=
+       for subdir in "${QT5_TARGET_SUBDIRS[@]}"; do
+               if [[ ${EBUILD_PHASE} == test ]]; then
+                       subdir=tests/auto${subdir#src}
+                       [[ -d ${S}/${subdir} ]] || continue
+               fi
+
+               local msg="Running $* ${subdir:+in ${subdir}}"
+               einfo "${msg}"
+
+               mkdir -p "${QT5_BUILD_DIR}/${subdir}" || die -n || return $?
+               pushd "${QT5_BUILD_DIR}/${subdir}" >/dev/null || die -n || 
return $?
+
+               "$@" || die -n "${msg} failed" || return $?
+
+               popd >/dev/null || die -n || return $?
+       done
+}
+
+# @FUNCTION: qt5_symlink_tools_to_build_dir
+# @INTERNAL
+# @DESCRIPTION:
+# Symlinks qmake and a few other tools to QT5_BUILD_DIR,
+# so that they can be used when building other modules.
+qt5_symlink_tools_to_build_dir() {
+       local tool= tools=()
+       if [[ ${PN} != qtcore ]]; then
+               tools+=(qmake moc rcc qlalr)
+               [[ ${PN} != qtdbus ]] && tools+=(qdbuscpp2xml qdbusxml2cpp)
+               [[ ${PN} != qtwidgets ]] && tools+=(uic)
+       fi
+
+       mkdir -p "${QT5_BUILD_DIR}"/bin || die
+       pushd "${QT5_BUILD_DIR}"/bin >/dev/null || die
+
+       for tool in "${tools[@]}"; do
+               [[ -e ${QT5_BINDIR}/${tool} ]] || continue
+               ln -s "${QT5_BINDIR}/${tool}" . || die "failed to symlink 
${tool}"
+       done
+
+       popd >/dev/null || die
+}
+
+# @FUNCTION: qt5_base_configure
+# @INTERNAL
+# @DESCRIPTION:
+# Runs ./configure for modules belonging to qtbase.
+qt5_base_configure() {
+       # setup toolchain variables used by configure
+       tc-export AR CC CXX OBJDUMP RANLIB STRIP
+       export LD="$(tc-getCXX)"
+
+       # bug 633838
+       if [[ ${QT5_MINOR_VERSION} -ge 9 ]]; then
+               unset QMAKESPEC XQMAKESPEC QMAKEPATH QMAKEFEATURES
+       fi
+
+       # configure arguments
+       local conf=(
+               # installation paths
+               -prefix "${QT5_PREFIX}"
+               -bindir "${QT5_BINDIR}"
+               -headerdir "${QT5_HEADERDIR}"
+               -libdir "${QT5_LIBDIR}"
+               -archdatadir "${QT5_ARCHDATADIR}"
+               -plugindir "${QT5_PLUGINDIR}"
+               -libexecdir "${QT5_LIBEXECDIR}"
+               -importdir "${QT5_IMPORTDIR}"
+               -qmldir "${QT5_QMLDIR}"
+               -datadir "${QT5_DATADIR}"
+               -docdir "${QT5_DOCDIR}"
+               -translationdir "${QT5_TRANSLATIONDIR}"
+               -sysconfdir "${QT5_SYSCONFDIR}"
+               -examplesdir "${QT5_EXAMPLESDIR}"
+               -testsdir "${QT5_TESTSDIR}"
+
+               # configure in release mode by default,
+               # override via the CONFIG qmake variable
+               -release
+               -no-separate-debug-info
+
+               # no need to forcefully build host tools in optimized mode,
+               # just follow the overall debug/release build type
+               -no-optimized-tools
+
+               # licensing stuff
+               -opensource -confirm-license
+
+               # autodetect the highest supported version of the C++ standard
+               #-c++std <c++11|c++14|c++1z>
+
+               # build shared libraries
+               -shared
+
+               # always enable large file support
+               $([[ ${QT5_MINOR_VERSION} -lt 8 ]] && echo -largefile)
+
+               # disabling accessibility is not recommended by upstream, as
+               # it will break QStyle and may break other internal parts of Qt
+               -accessibility
+
+               # disable all SQL drivers by default, override in qtsql
+               -no-sql-db2 -no-sql-ibase -no-sql-mysql -no-sql-oci -no-sql-odbc
+               -no-sql-psql -no-sql-sqlite -no-sql-sqlite2 -no-sql-tds
+
+               # ensure the QML debugging support (qmltooling) is built in 
qtdeclarative
+               -qml-debug
+
+               # MIPS DSP instruction set extensions
+               $(is-flagq -mno-dsp   && echo -no-mips_dsp)
+               $(is-flagq -mno-dspr2 && echo -no-mips_dspr2)
+
+               # use pkg-config to detect include and library paths
+               -pkg-config
+
+               # prefer system libraries (only common hard deps here)
+               -system-zlib
+               -system-pcre
+               -system-doubleconversion
+
+               # disable everything to prevent automagic deps (part 1)
+               -no-mtdev
+               -no-journald -no-syslog
+               -no-libpng -no-libjpeg
+               -no-freetype -no-harfbuzz
+               -no-openssl -no-libproxy
+               -no-xkbcommon-x11 -no-xkbcommon-evdev
+               -no-xinput2 -no-xcb-xlib
+
+               # cannot use -no-gif because there is no way to override it 
later
+               #-no-gif
+
+               # always enable glib event loop support
+               -glib
+
+               # disable everything to prevent automagic deps (part 2)
+               -no-gtk
+               $([[ ${QT5_MINOR_VERSION} -lt 8 ]] && echo -no-pulseaudio 
-no-alsa)
+
+               # exclude examples and tests from default build
+               -nomake examples
+               -nomake tests
+               -no-compile-examples
+
+               # disable rpath on non-prefix (bugs 380415 and 417169)
+               $(usex prefix '' -no-rpath)
+
+               # print verbose information about each configure test
+               -verbose
+
+               # always enable iconv support
+               # since 5.8 this is handled in qtcore
+               $([[ ${QT5_MINOR_VERSION} -lt 8 ]] && echo -iconv)
+
+               # disable everything to prevent automagic deps (part 3)
+               -no-cups -no-evdev -no-tslib -no-icu -no-fontconfig -no-dbus
+
+               # let portage handle stripping
+               -no-strip
+
+               # precompiled headers can cause problems on hardened, so turn 
them off
+               -no-pch
+
+               # link-time code generation is not something we want to enable 
by default
+               -no-ltcg
+
+               # reduced relocations cause major breakage on at least arm and 
ppc, so
+               # don't specify anything and let the configure figure out if 
they are
+               # supported; see also 
https://bugreports.qt.io/browse/QTBUG-36129
+               #-reduce-relocations
+
+               # let configure automatically detect if GNU gold is available
+               -no-use-gold-linker
+
+               # disable all platform plugins by default, override in qtgui
+               -no-xcb -no-eglfs -no-kms -no-gbm -no-directfb -no-linuxfb 
-no-mirclient
+
+               # disable undocumented X11-related flags, override in qtgui
+               # (not shown in ./configure -help output)
+               -no-xkb
+               $([[ ${QT5_MINOR_VERSION} -lt 8 ]] && echo -no-xrender)
+
+               # disable obsolete/unused X11-related flags
+               $([[ ${QT5_MINOR_VERSION} -lt 8 ]] && echo -no-mitshm 
-no-xcursor -no-xfixes -no-xrandr -no-xshape -no-xsync)
+
+               # always enable session management support: it doesn't need 
extra deps
+               # at configure time and turning it off is dangerous, see bug 
518262
+               -sm
+
+               # typedef qreal to double (warning: changing this flag breaks 
the ABI)
+               -qreal double
+
+               # disable OpenGL and EGL support by default, override in qtgui,
+               # qtopengl, qtprintsupport and qtwidgets
+               -no-opengl -no-egl
+
+               # disable libinput-based generic plugin by default, override in 
qtgui
+               -no-libinput
+
+               # disable gstreamer by default, override in qtmultimedia
+               $([[ ${QT5_MINOR_VERSION} -lt 8 ]] && echo -no-gstreamer)
+
+               # respect system proxies by default: it's the most natural
+               # setting, and it'll become the new upstream default in 5.8
+               -system-proxies
+
+               # do not build with -Werror
+               -no-warnings-are-errors
+
+               # module-specific options
+               "${myconf[@]}"
+       )
+
+       pushd "${QT5_BUILD_DIR}" >/dev/null || die
+
+       einfo "Configuring with: ${conf[@]}"
+       "${S}"/configure "${conf[@]}" || die "configure failed"
+
+       if [[ ${QT5_MINOR_VERSION} -ge 8 ]]; then
+               # a forwarding header is no longer created since 5.8, causing 
the system
+               # config to always be used. bug 599636
+               cp src/corelib/global/qconfig.h include/QtCore/ || die
+       fi
+
+       popd >/dev/null || die
+
+}
+
+# @FUNCTION: qt5_qmake
+# @INTERNAL
+# @DESCRIPTION:
+# Helper function that runs qmake in the current target subdir.
+# Intended to be called by qt5_foreach_target_subdir().
+qt5_qmake() {
+       local projectdir=${PWD/#${QT5_BUILD_DIR}/${S}}
+       local qmakepath=
+       if [[ ${QT5_MODULE} == qtbase ]]; then
+               qmakepath=${QT5_BUILD_DIR}/bin
+       else
+               qmakepath=${QT5_BINDIR}
+       fi
+
+       "${qmakepath}"/qmake \
+               "${projectdir}" \
+               CONFIG+=$(usex debug debug release) \
+               CONFIG-=$(usex debug release debug) \
+               QMAKE_AR="$(tc-getAR) cqs" \
+               QMAKE_CC="$(tc-getCC)" \
+               QMAKE_LINK_C="$(tc-getCC)" \
+               QMAKE_LINK_C_SHLIB="$(tc-getCC)" \
+               QMAKE_CXX="$(tc-getCXX)" \
+               QMAKE_LINK="$(tc-getCXX)" \
+               QMAKE_LINK_SHLIB="$(tc-getCXX)" \
+               QMAKE_OBJCOPY="$(tc-getOBJCOPY)" \
+               QMAKE_RANLIB= \
+               QMAKE_STRIP="$(tc-getSTRIP)" \
+               QMAKE_CFLAGS="${CFLAGS}" \
+               QMAKE_CFLAGS_RELEASE= \
+               QMAKE_CFLAGS_DEBUG= \
+               QMAKE_CXXFLAGS="${CXXFLAGS}" \
+               QMAKE_CXXFLAGS_RELEASE= \
+               QMAKE_CXXFLAGS_DEBUG= \
+               QMAKE_LFLAGS="${LDFLAGS}" \
+               QMAKE_LFLAGS_RELEASE= \
+               QMAKE_LFLAGS_DEBUG= \
+               "${myqmakeargs[@]}" \
+               || die "qmake failed (${projectdir#${S}/})"
+}
+
+# @FUNCTION: qt5_install_module_qconfigs
+# @INTERNAL
+# @DESCRIPTION:
+# Creates and installs gentoo-specific ${PN}-qconfig.{h,pri} files.
+qt5_install_module_qconfigs() {
+       local x qconfig_add= qconfig_remove=
+
+       > "${T}"/${PN}-qconfig.h
+       > "${T}"/${PN}-qconfig.pri
+
+       # generate qconfig_{add,remove} and ${PN}-qconfig.h
+       for x in "${QT5_GENTOO_CONFIG[@]}"; do
+               local flag=${x%%:*}
+               x=${x#${flag}:}
+               local feature=${x%%:*}
+               x=${x#${feature}:}
+               local macro=${x}
+               macro=$(tr 'a-z-' 'A-Z_' <<< "${macro}")
+
+               if [[ -z ${flag} ]] || { [[ ${flag} != '!' ]] && use ${flag}; 
}; then
+                       [[ -n ${feature} ]] && qconfig_add+=" ${feature}"
+                       [[ -n ${macro} ]] && echo "#define QT_${macro}" >> 
"${T}"/${PN}-qconfig.h
+               else
+                       [[ -n ${feature} ]] && qconfig_remove+=" ${feature}"
+                       [[ -n ${macro} ]] && echo "#define QT_NO_${macro}" >> 
"${T}"/${PN}-qconfig.h
+               fi
+       done
+
+       # install ${PN}-qconfig.h
+       [[ -s ${T}/${PN}-qconfig.h ]] && (
+               insinto "${QT5_HEADERDIR#${EPREFIX}}"/Gentoo
+               doins "${T}"/${PN}-qconfig.h
+       )
+
+       # generate and install ${PN}-qconfig.pri
+       [[ -n ${qconfig_add} ]] && echo "QCONFIG_ADD=${qconfig_add}" >> 
"${T}"/${PN}-qconfig.pri
+       [[ -n ${qconfig_remove} ]] && echo "QCONFIG_REMOVE=${qconfig_remove}" 
>> "${T}"/${PN}-qconfig.pri
+       [[ -s ${T}/${PN}-qconfig.pri ]] && (
+               insinto "${QT5_ARCHDATADIR#${EPREFIX}}"/mkspecs/gentoo
+               doins "${T}"/${PN}-qconfig.pri
+       )
+}
+
+# @FUNCTION: qt5_regenerate_global_qconfigs
+# @INTERNAL
+# @DESCRIPTION:
+# Generates Gentoo-specific qconfig.{h,pri} according to the build 
configuration.
+# Don't call die here because dying in pkg_post{inst,rm} only makes things 
worse.
+qt5_regenerate_global_qconfigs() {
+       einfo "Regenerating gentoo-qconfig.h"
+
+       find "${ROOT%/}${QT5_HEADERDIR}"/Gentoo \
+               -name '*-qconfig.h' -a \! -name 'gentoo-qconfig.h' -type f \
+               -execdir cat '{}' + | sort -u > "${T}"/gentoo-qconfig.h
+
+       [[ -s ${T}/gentoo-qconfig.h ]] || ewarn "Generated gentoo-qconfig.h is 
empty"
+       mv -f "${T}"/gentoo-qconfig.h 
"${ROOT%/}${QT5_HEADERDIR}"/Gentoo/gentoo-qconfig.h \
+               || eerror "Failed to install new gentoo-qconfig.h"
+
+       einfo "Updating QT_CONFIG in qconfig.pri"
+
+       local qconfig_pri=${ROOT%/}${QT5_ARCHDATADIR}/mkspecs/qconfig.pri
+       if [[ -f ${qconfig_pri} ]]; then
+               local x qconfig_add= qconfig_remove=
+               local qt_config=$(sed -n 's/^QT_CONFIG\s*+=\s*//p' 
"${qconfig_pri}")
+               local new_qt_config=
+
+               # generate list of QT_CONFIG entries from the existing list,
+               # appending QCONFIG_ADD and excluding QCONFIG_REMOVE
+               eshopts_push -s nullglob
+               for x in 
"${ROOT%/}${QT5_ARCHDATADIR}"/mkspecs/gentoo/*-qconfig.pri; do
+                       qconfig_add+=" $(sed -n 's/^QCONFIG_ADD=\s*//p' "${x}")"
+                       qconfig_remove+=" $(sed -n 's/^QCONFIG_REMOVE=\s*//p' 
"${x}")"
+               done
+               eshopts_pop
+               for x in ${qt_config} ${qconfig_add}; do
+                       if ! has "${x}" ${new_qt_config} ${qconfig_remove}; then
+                               new_qt_config+=" ${x}"
+                       fi
+               done
+
+               # now replace the existing QT_CONFIG with the generated list
+               sed -i -e "s/^QT_CONFIG\s*+=.*/QT_CONFIG +=${new_qt_config}/" \
+                       "${qconfig_pri}" || eerror "Failed to sed QT_CONFIG in 
${qconfig_pri}"
+       else
+               ewarn "${qconfig_pri} does not exist or is not a regular file"
+       fi
+}

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