Ready ebuild

boost-1.49.0-r2.ebuild (text/plain), 19.35 KB, created by Vladislav Mikhailikov on 2012-05-11 09:58:21 UTC

# Copyright 1999-2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/dev-libs/boost/boost-1.49.0-r1.ebuild,v 1.1 2012/05/06 16:22:14 hwoarang Exp $

EAPI="4"
PYTHON_DEPEND="python? *"
SUPPORT_PYTHON_ABIS="1"
RESTRICT_PYTHON_ABIS="*-jython *-pypy-*"

inherit check-reqs flag-o-matic multilib python toolchain-funcs versionator

MY_P=${PN}_$(replace_all_version_separators _)

DESCRIPTION="Boost Libraries for C++"
HOMEPAGE="http://www.boost.org/"
SRC_URI="mirror://sourceforge/boost/${MY_P}.tar.bz2"

LICENSE="Boost-1.0"
SLOT="$(get_version_component_range 1-2)"
KEYWORDS="~alpha ~amd64 ~arm ~hppa ~ia64 ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc ~x86 ~amd64-fbsd ~x86-fbsd"
IUSE="debug doc +eselect icu mpi python static-libs test tools"

RDEPEND="icu? ( >=dev-libs/icu-3.3 )
	mpi? ( || ( sys-cluster/openmpi[cxx] sys-cluster/mpich2[cxx,threads] ) )
	sys-libs/zlib
	!!<=dev-libs/boost-1.35.0-r2
	>=app-admin/eselect-boost-0.4"
DEPEND="${RDEPEND}
	dev-util/boost-build:${SLOT}"

S=${WORKDIR}/${MY_P}

MAJOR_PV=$(replace_all_version_separators _ ${SLOT})
BJAM="b2-${MAJOR_PV}"

# Usage:
# _add_line <line-to-add> <profile>
# ... to add to specific profile
# or
# _add_line <line-to-add>
# ... to add to all profiles for which the use flag set

_add_line() {
	if [[ -z "$2" ]]; then
		echo "${1}" >> "${D}usr/share/boost-eselect/profiles/${SLOT}/default"
		if use debug; then
			echo "${1}" >> "${D}usr/share/boost-eselect/profiles/${SLOT}/debug"
		fi
	else
		echo "${1}" >> "${D}usr/share/boost-eselect/profiles/${SLOT}/${2}"
	fi
}

create_user-config.jam() {
	local compiler compiler_version compiler_executable

	if [[ ${CHOST} == *-darwin* ]]; then
		compiler="darwin"
		compiler_version="$(gcc-fullversion)"
		compiler_executable="$(tc-getCXX)"
	else
		compiler="gcc"
		compiler_version="$(gcc-version)"
		compiler_executable="$(tc-getCXX)"
	fi
	local mpi_configuration python_configuration

	if use mpi; then
		mpi_configuration="using mpi ;"
	fi

	if use python; then
		python_configuration="using python : $(python_get_version) : /usr : $(python_get_includedir) : /usr/$(get_libdir) ;"
	fi

	# The debug-symbols=none and optimization=none are not official upstream flags but a Gentoo
	# specific patch to make sure that all our CFLAGS/CXXFLAGS/LDFLAGS are being respected.
	# Using optimization=off would for example add "-O0" and override "-O2" set by the user.
	# Please take a look at the boost-build ebuild for more information.
	cat > user-config.jam << __EOF__
variant gentoorelease : release : <optimization>none <debug-symbols>none ;
variant gentoodebug : debug : <optimization>none ;

using ${compiler} : ${compiler_version} : ${compiler_executable} : <cflags>"${CFLAGS}" <cxxflags>"${CXXFLAGS}" <linkflags>"${LDFLAGS}" ;
${mpi_configuration}
${python_configuration}
__EOF__
}

pkg_pretend() {
	if use test; then
		CHECKREQS_DISK_BUILD="15G" check-reqs_pkg_pretend

		ewarn "The tests may take several hours on a recent machine"
		ewarn "but they will not fail (unless something weird happens ;-)"
		ewarn "This is because the tests depend on the used compiler version"
		ewarn "and the platform and upstream says that this is normal."
		ewarn "If you are interested in the results, please take a look at the"
		ewarn "generated results page:"
		ewarn "  ${ROOT}usr/share/doc/${PF}/status/cs-$(uname).html"
	fi
}

pkg_setup() {
	if use python; then
		python_pkg_setup
	fi

	if use debug; then
		ewarn "The debug USE flag means that a second set of the boost libraries"
		ewarn "will be built containing debug symbols. You'll be able to select them"
		ewarn "using the boost-eselect module. But even though the optimization flags"
		ewarn "you might have set are not stripped, there will be a performance"
		ewarn "penalty and linking other packages against the debug version"
		ewarn "of boost is _not_ recommended."
	fi
}

src_prepare() {
	epatch "${FILESDIR}/${PN}-1.48.0-mpi_python3.patch"
	epatch "${FILESDIR}/${PN}-1.48.0-respect_python-buildid.patch"
	epatch "${FILESDIR}/${PN}-1.48.0-support_dots_in_python-buildid.patch"
	epatch "${FILESDIR}/${PN}-1.48.0-no_strict_aliasing_python2.patch"
	epatch "${FILESDIR}/${PN}-1.48.0-disable_libboost_python3.patch"
	epatch "${FILESDIR}/${PN}-1.48.0-python_linking.patch"
	epatch "${FILESDIR}/${PN}-1.48.0-disable_icu_rpath.patch"
	epatch "${FILESDIR}/${PN}-1.49.0-gcc462-intrusive_ptr.patch"
	epatch "${FILESDIR}/remove-toolset-1.48.0.patch"
}

src_configure() {
	OPTIONS=""

	if [[ ${CHOST} == *-darwin* ]]; then
		# We need to add the prefix, and in two cases this exceeds, so prepare
		# for the largest possible space allocation.
		append-ldflags -Wl,-headerpad_max_install_names
	fi

	# bug 298489
	if use ppc || use ppc64; then
		[[ $(gcc-version) > 4.3 ]] && append-flags -mno-altivec
	fi

	use icu && OPTIONS+=" -sICU_PATH=/usr"
	use icu || OPTIONS+=" --disable-icu boost.locale.icu=off"
	use mpi || OPTIONS+=" --without-mpi"
	use python || OPTIONS+=" --without-python"

	# https://svn.boost.org/trac/boost/attachment/ticket/2597/add-disable-long-double.patch
	if use sparc || { use mips && [[ ${ABI} = "o32" ]]; } || use hppa || use arm || use x86-fbsd || use sh; then
		OPTIONS+=" --disable-long-double"
	fi

	OPTIONS+=" pch=off --boost-build=/usr/share/boost-build-${MAJOR_PV} --prefix=\"${D}usr\" --layout=versioned"

	if use static-libs; then
		LINK_OPTS="link=shared,static"
		LIBRARY_TARGETS="*.a *$(get_libname)"
	else
		LINK_OPTS="link=shared"
		# There is no dynamically linked version of libboost_test_exec_monitor and libboost_exception.
		LIBRARY_TARGETS="libboost_test_exec_monitor*.a libboost_exception*.a *$(get_libname)"
	fi
}

src_compile() {
	local jobs
	jobs=$( echo " ${MAKEOPTS} " | \
		sed -e 's/ --jobs[= ]/ -j /g' \
			-e 's/ -j \([1-9][0-9]*\)/ -j\1/g' \
			-e 's/ -j\>/ -j1/g' | \
			( while read -d ' ' j; do if [[ "${j#-j}" = "$j" ]]; then continue; fi; jobs="${j#-j}"; done; echo ${jobs} ) )
	if [[ "${jobs}" != "" ]]; then NUMJOBS="-j"${jobs}; fi

	export BOOST_ROOT="${S}"
	PYTHON_DIRS=""
	MPI_PYTHON_MODULE=""

	building() {
		create_user-config.jam

		einfo "Using the following command to build:"
		einfo "${BJAM} ${NUMJOBS} -q -d+2 gentoorelease --user-config=user-config.jam ${OPTIONS} threading=single,multi ${LINK_OPTS} runtime-link=shared $(use python && echo --python-buildid=${PYTHON_ABI})"

		${BJAM} ${NUMJOBS} -q -d+2 \
			gentoorelease \
			--user-config=user-config.jam \
			${OPTIONS} \
			threading=single,multi ${LINK_OPTS} runtime-link=shared \
			$(use python && echo --python-buildid=${PYTHON_ABI}) \
			|| die "Building of Boost libraries failed"

		# ... and do the whole thing one more time to get the debug libs
		if use debug; then
			einfo "Using the following command to build:"
			einfo "${BJAM} ${NUMJOBS} -q -d+2 gentoodebug --user-config=user-config.jam ${OPTIONS} threading=single,multi ${LINK_OPTS} runtime-link=shared --buildid=debug $(use python && echo --python-buildid=${PYTHON_ABI})"

			${BJAM} ${NUMJOBS} -q -d+2 \
				gentoodebug \
				--user-config=user-config.jam \
				${OPTIONS} \
				threading=single,multi ${LINK_OPTS} runtime-link=shared \
				--buildid=debug \
				$(use python && echo --python-buildid=${PYTHON_ABI}) \
				|| die "Building of Boost debug libraries failed"
		fi

		if use python; then
			if [[ -z "${PYTHON_DIRS}" ]]; then
				PYTHON_DIRS="$(find bin.v2/libs -name python | sort)"
			else
				if [[ "${PYTHON_DIRS}" != "$(find bin.v2/libs -name python | sort)" ]]; then
					die "Inconsistent structure of build directories"
				fi
			fi

			local dir
			for dir in ${PYTHON_DIRS}; do
				mv ${dir} ${dir}-${PYTHON_ABI} || die "Renaming of '${dir}' to '${dir}-${PYTHON_ABI}' failed"
			done

			if use mpi; then
				if [[ -z "${MPI_PYTHON_MODULE}" ]]; then
					MPI_PYTHON_MODULE="$(find bin.v2/libs/mpi/build/*/gentoorelease -name mpi.so)"
					if [[ "$(echo "${MPI_PYTHON_MODULE}" | wc -l)" -ne 1 ]]; then
						die "Multiple mpi.so files found"
					fi
				else
					if [[ "${MPI_PYTHON_MODULE}" != "$(find bin.v2/libs/mpi/build/*/gentoorelease -name mpi.so)" ]]; then
						die "Inconsistent structure of build directories"
					fi
				fi

				mv stage/lib/mpi.so stage/lib/mpi.so-${PYTHON_ABI} || die "Renaming of 'stage/lib/mpi.so' to 'stage/lib/mpi.so-${PYTHON_ABI}' failed"
			fi
		fi
	}
	if use python; then
		python_execute_function building
	else
		building
	fi

	if use tools; then
		pushd tools > /dev/null || die
		einfo "Using the following command to build the tools:"
		einfo "${BJAM} ${NUMJOBS} -q -d+2 gentoorelease --user-config=../user-config.jam ${OPTIONS}"

		${BJAM} ${NUMJOBS} -q -d+2\
			gentoorelease \
			--user-config=../user-config.jam \
			${OPTIONS} \
			|| die "Building of Boost tools failed"
		popd > /dev/null || die
	fi
}

src_install () {
	dodir /usr/share/boost-eselect/profiles/${SLOT}
	touch "${D}usr/share/boost-eselect/profiles/${SLOT}/default" || die
	if use debug; then
		 touch "${D}usr/share/boost-eselect/profiles/${SLOT}/debug" || die
	fi

	if use mpi && use python; then
		_add_line "python_modules=\""
	fi

	installation() {
		create_user-config.jam

		if use python; then
			local dir
			for dir in ${PYTHON_DIRS}; do
				cp -pr ${dir}-${PYTHON_ABI} ${dir} || die "Copying of '${dir}-${PYTHON_ABI}' to '${dir}' failed"
			done

			if use mpi; then
				cp -p stage/lib/mpi.so-${PYTHON_ABI} "${MPI_PYTHON_MODULE}" || die "Copying of 'stage/lib/mpi.so-${PYTHON_ABI}' to '${MPI_PYTHON_MODULE}' failed"
				cp -p stage/lib/mpi.so-${PYTHON_ABI} stage/lib/mpi.so || die "Copying of 'stage/lib/mpi.so-${PYTHON_ABI}' to 'stage/lib/mpi.so' failed"
			fi
		fi

		einfo "Using the following command to install:"
		einfo "${BJAM} -q -d+2 gentoorelease --user-config=user-config.jam ${OPTIONS} threading=single,multi ${LINK_OPTS} runtime-link=shared --includedir=\"${D}usr/include\" --libdir=\"${D}usr/$(get_libdir)\" $(use python && echo --python-buildid=${PYTHON_ABI}) install"

		${BJAM} -q -d+2 \
			gentoorelease \
			--user-config=user-config.jam \
			${OPTIONS} \
			threading=single,multi ${LINK_OPTS} runtime-link=shared \
			--includedir="${D}usr/include" \
			--libdir="${D}usr/$(get_libdir)" \
			$(use python && echo --python-buildid=${PYTHON_ABI}) \
			install || die "Installation of Boost libraries failed"

		if use debug; then
			einfo "Using the following command to install:"
			einfo "${BJAM} -q -d+2 gentoodebug --user-config=user-config.jam ${OPTIONS} threading=single,multi ${LINK_OPTS} runtime-link=shared --includedir=\"${D}usr/include\" --libdir=\"${D}usr/$(get_libdir)\" --buildid=debug $(use python && echo --python-buildid=${PYTHON_ABI})"

			${BJAM} -q -d+2 \
				gentoodebug \
				--user-config=user-config.jam \
				${OPTIONS} \
				threading=single,multi ${LINK_OPTS} runtime-link=shared \
				--includedir="${D}usr/include" \
				--libdir="${D}usr/$(get_libdir)" \
				--buildid=debug \
				$(use python && echo --python-buildid=${PYTHON_ABI}) \
				install || die "Installation of Boost debug libraries failed"
		fi

		if use python; then
			rm -r ${PYTHON_DIRS} || die

			# Move mpi.so Python module to Python site-packages directory and make sure it is slotted.
			if use mpi; then
				mkdir -p "${D}$(python_get_sitedir)/boost_${MAJOR_PV}" || die
				mv "${D}usr/$(get_libdir)/mpi.so" "${D}$(python_get_sitedir)/boost_${MAJOR_PV}" || die
				cat << EOF > "${D}$(python_get_sitedir)/boost_${MAJOR_PV}/__init__.py" || die
import sys
if sys.platform.startswith('linux'):
	import DLFCN
	flags = sys.getdlopenflags()
	sys.setdlopenflags(DLFCN.RTLD_NOW | DLFCN.RTLD_GLOBAL)
	from . import mpi
	sys.setdlopenflags(flags)
	del DLFCN, flags
else:
	from . import mpi
del sys
EOF
				_add_line "$(python_get_sitedir)/mpi.py:boost_${MAJOR_PV}.mpi"
			fi
		fi
	}
	if use python; then
		python_execute_function installation
	else
		installation
	fi

	if use mpi && use python; then
		_add_line "\""
	fi

	use python || rm -rf "${D}usr/include/boost-${MAJOR_PV}/boost"/python* || die

	if use doc; then
		find libs/*/* -iname "test" -or -iname "src" | xargs rm -rf
		dohtml \
			-A pdf,txt,cpp,hpp \
			*.{htm,html,png,css} \
			-r doc
		dohtml \
			-A pdf,txt \
			-r tools
		insinto /usr/share/doc/${PF}/html
		doins -r libs
		doins -r more

		# To avoid broken links
		insinto /usr/share/doc/${PF}/html
		doins LICENSE_1_0.txt

		dosym /usr/include/boost-${MAJOR_PV}/boost /usr/share/doc/${PF}/html/boost
	fi

	pushd "${D}usr/$(get_libdir)" > /dev/null || die

	# Remove (unversioned) symlinks
	# And check for what we remove to catch bugs
	# got a better idea how to do it? tell me!
	local f
	for f in $(ls -1 ${LIBRARY_TARGETS} | grep -v "${MAJOR_PV}"); do
		if [[ ! -h "${f}" ]]; then
			eerror "Tried to remove '${f}' which is a regular file instead of a symlink"
			die "Slotting/naming of the libraries broken!"
		fi
		rm "${f}" || die
	done

	# The threading libs obviously always gets the "-mt" (multithreading) tag
	# some packages seem to have a problem with it. Creating symlinks...

	if use static-libs; then
		THREAD_LIBS="libboost_thread-mt-${MAJOR_PV}.a libboost_thread-mt-${MAJOR_PV}$(get_libname)"
	else
		THREAD_LIBS="libboost_thread-mt-${MAJOR_PV}$(get_libname)"
	fi
	local lib
	for lib in ${THREAD_LIBS}; do
		dosym ${lib} "/usr/$(get_libdir)/$(sed -e 's/-mt//' <<< ${lib})"
	done

	# The same goes for the mpi libs
	if use mpi; then
		if use static-libs; then
			MPI_LIBS="libboost_mpi-mt-${MAJOR_PV}.a libboost_mpi-mt-${MAJOR_PV}$(get_libname)"
		else
			MPI_LIBS="libboost_mpi-mt-${MAJOR_PV}$(get_libname)"
		fi
		local lib
		for lib in ${MPI_LIBS}; do
			dosym ${lib} "/usr/$(get_libdir)/$(sed -e 's/-mt//' <<< ${lib})"
		done
	fi

	if use debug; then
		if use static-libs; then
			THREAD_DEBUG_LIBS="libboost_thread-mt-${MAJOR_PV}-debug$(get_libname) libboost_thread-mt-${MAJOR_PV}-debug.a"
		else
			THREAD_DEBUG_LIBS="libboost_thread-mt-${MAJOR_PV}-debug$(get_libname)"
		fi

		local lib
		for lib in ${THREAD_DEBUG_LIBS}; do
			dosym ${lib} "/usr/$(get_libdir)/$(sed -e 's/-mt//' <<< ${lib})"
		done

		if use mpi; then
			if use static-libs; then
				MPI_DEBUG_LIBS="libboost_mpi-mt-${MAJOR_PV}-debug.a libboost_mpi-mt-${MAJOR_PV}-debug$(get_libname)"
			else
				MPI_DEBUG_LIBS="libboost_mpi-mt-${MAJOR_PV}-debug$(get_libname)"
			fi

			local lib
			for lib in ${MPI_DEBUG_LIBS}; do
				dosym ${lib} "/usr/$(get_libdir)/$(sed -e 's/-mt//' <<< ${lib})"
			done
		fi
	fi

	# Create a subdirectory with completely unversioned symlinks
	# and store the names in the profiles-file for eselect
	dodir /usr/$(get_libdir)/boost-${MAJOR_PV}

	_add_line "libs=\"" default
	local f
	for f in $(ls -1 ${LIBRARY_TARGETS} | grep -v debug); do
		dosym ../${f} /usr/$(get_libdir)/boost-${MAJOR_PV}/${f/-${MAJOR_PV}}
		_add_line "/usr/$(get_libdir)/${f}" default
	done
	_add_line "\"" default

	if use debug; then
		_add_line "libs=\"" debug
		dodir /usr/$(get_libdir)/boost-${MAJOR_PV}-debug
		local f
		for f in $(ls -1 ${LIBRARY_TARGETS} | grep debug); do
			dosym ../${f} /usr/$(get_libdir)/boost-${MAJOR_PV}-debug/${f/-${MAJOR_PV}-debug}
			_add_line "/usr/$(get_libdir)/${f}" debug
		done
		_add_line "\"" debug

		_add_line "includes=\"/usr/include/boost-${MAJOR_PV}/boost\"" debug
		_add_line "suffix=\"-debug\"" debug
	fi

	_add_line "includes=\"/usr/include/boost-${MAJOR_PV}/boost\"" default

	popd > /dev/null || die

	if use tools; then
		pushd dist/bin > /dev/null || die
		# Append version postfix to binaries for slotting
		_add_line "bins=\""
		local b
		for b in *; do
			newbin "${b}" "${b}-${MAJOR_PV}"
			_add_line "/usr/bin/${b}-${MAJOR_PV}"
		done
		_add_line "\""
		popd > /dev/null || die

		pushd dist > /dev/null || die
		insinto /usr/share
		doins -r share/boostbook
		# Append version postfix for slotting
		mv "${D}usr/share/boostbook" "${D}usr/share/boostbook-${MAJOR_PV}" || die
		_add_line "dirs=\"/usr/share/boostbook-${MAJOR_PV}\""
		popd > /dev/null || die
	fi

	pushd status > /dev/null || die
	if [[ -f regress.log ]]; then
		docinto status
		dohtml *.html ../boost.png
		dodoc regress.log
	fi
	popd > /dev/null || die

	# boost's build system truely sucks for not having a destdir.  Because for
	# this reason we are forced to build with a prefix that includes the
	# DESTROOT, dynamic libraries on Darwin end messed up, referencing the
	# DESTROOT instread of the actual EPREFIX.  There is no way out of here
	# but to do it the dirty way of manually setting the right install_names.
	if [[ ${CHOST} == *-darwin* ]]; then
		einfo "Working around completely broken build-system(tm)"
		local d
		for d in "${ED}"usr/lib/*.dylib; do
			if [[ -f ${d} ]]; then
				# fix the "soname"
				ebegin "  correcting install_name of ${d#${ED}}"
				install_name_tool -id "/${d#${D}}" "${d}"
				eend $?
				# fix references to other libs
				refs=$(otool -XL "${d}" | \
					sed -e '1d' -e 's/^\t//' | \
					grep "^libboost_" | \
					cut -f1 -d' ')
				local r
				for r in ${refs}; do
					ebegin "    correcting reference to ${r}"
					install_name_tool -change \
						"${r}" \
						"${EPREFIX}/usr/lib/${r}" \
						"${d}"
					eend $?
				done
			fi
		done
	fi
}

src_test() {
	testing() {
		if use python; then
			local dir
			for dir in ${PYTHON_DIRS}; do
				cp -pr ${dir}-${PYTHON_ABI} ${dir} || die "Copying of '${dir}-${PYTHON_ABI}' to '${dir}' failed"
			done

			if use mpi; then
				cp -p stage/lib/mpi.so-${PYTHON_ABI} "${MPI_PYTHON_MODULE}" || die "Copying of 'stage/lib/mpi.so-${PYTHON_ABI}' to '${MPI_PYTHON_MODULE}' failed"
				cp -p stage/lib/mpi.so-${PYTHON_ABI} stage/lib/mpi.so || die "Copying of 'stage/lib/mpi.so-${PYTHON_ABI}' to 'stage/lib/mpi.so' failed"
			fi
		fi

		pushd tools/regression/build > /dev/null || die
		einfo "Using the following command to build test helpers:"
		einfo "${BJAM} -q -d+2 gentoorelease --user-config=../../../user-config.jam ${OPTIONS} process_jam_log compiler_status"

		${BJAM} -q -d+2 \
			gentoorelease \
			--user-config=../../../user-config.jam \
			${OPTIONS} \
			process_jam_log compiler_status \
			|| die "Building of regression test helpers failed"

		popd > /dev/null || die
		pushd status > /dev/null || die

		# Some of the test-checks seem to rely on regexps
		export LC_ALL="C"

		# The following is largely taken from tools/regression/run_tests.sh,
		# but adapted to our needs.

		# Run the tests & write them into a file for postprocessing
		einfo "Using the following command to test:"
		einfo "${BJAM} --user-config=../user-config.jam ${OPTIONS} --dump-tests"

		${BJAM} \
			--user-config=../user-config.jam \
			${OPTIONS} \
			--dump-tests 2>&1 | tee regress.log || die

		# Postprocessing
		cat regress.log | ../tools/regression/build/bin/gcc-$(gcc-version)/gentoorelease/pch-off/process_jam_log --v2
		if test $? != 0; then
			die "Postprocessing the build log failed"
		fi

		cat > comment.html <<- __EOF__
		<p>Tests are run on a <a href="http://www.gentoo.org">Gentoo</a> system.</p>
__EOF__

		# Generate the build log html summary page
		../tools/regression/build/bin/gcc-$(gcc-version)/gentoorelease/pch-off/compiler_status --v2 \
			--comment comment.html "${S}" \
			cs-$(uname).html cs-$(uname)-links.html
		if test $? != 0; then
			die "Generating the build log html summary page failed"
		fi

		# And do some cosmetic fixes :)
		sed -i -e 's|http://www.boost.org/boost.png|boost.png|' *.html || die

		popd > /dev/null || die

		if use python; then
			rm -r ${PYTHON_DIRS} || die
		fi
	}
	if use python; then
		python_execute_function -f -q testing
	else
		testing
	fi
}

pkg_postinst() {
	if use eselect; then
		eselect boost update || ewarn "eselect boost update failed."
	fi

	if [[ ! -h "${ROOT}etc/eselect/boost/active" ]]; then
		elog "No active boost version found. Calling eselect to select one..."
		eselect boost update || ewarn "eselect boost update failed."
	fi
}