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#!/usr/bin/bash
#
# lto.sh - Compile with link-time optimization
#
# Copyright (c) 2008-2016 Pacman Development Team <pacman-dev@archlinux.org>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
[[ -n "$LIBMAKEPKG_LTO_SH" ]] && return
LIBMAKEPKG_LTO_SH=1
LIBRARY=${LIBRARY:-'@libmakepkgdir@'}
source "$LIBRARY/util/option.sh"
extra_buildopts+=('lto')
lto() {
if check_buildoption "lto" "y" && [[ -f "$(gcc -print-search-dirs | grep install | awk '{print $2 "liblto_plugin.so"}')" ]]; then
CFLAGS+=" -flto=$(getconf _NPROCESSORS_ONLN)"
CXXFLAGS+=" -flto=$(getconf _NPROCESSORS_ONLN)"
LDFLAGS+=" -fuse-linker-plugin"
LTOPLUGIN="$(gcc -print-search-dirs | grep install | awk '{print $2 "liblto_plugin.so"}')"
ARFLAGS+=" --plugin $LTOPLUGIN"
RANLIBFLAGS+=" --plugin $LTOPLUGIN"
NMFLAGS+=" --plugin $LTOPLUGIN"
fi
}
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