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#!/usr/bin/bash
#
# lto.sh - Compile with link-time optimization
#
[[ -n "$LIBMAKEPKG_BUILDENV_LTO_SH" ]] && return
LIBMAKEPKG_BUILDENV_LTO_SH=1
LIBRARY=${LIBRARY:-'@libmakepkgdir@'}
source "$LIBRARY/util/option.sh"
build_options+=('lto' 'lto-thin')
buildenv_functions+=('buildenv_lto')
buildenv_lto() {
if check_buildoption "lto" "y" || check_buildoption "lto-thin" "y" && \
[[ -f "$(gcc -print-search-dirs | grep install | awk '{print $2 "liblto_plugin.so"}')" ]]; then
[[ "$CC" == "clang" ]] && \
CFLAGS+=" -flto" || \
CFLAGS+=" -flto=$(getconf _NPROCESSORS_ONLN) -flto-partition=none -fno-fat-lto-objects"
[[ "$CXX" == "clang++" ]] && \
CXXFLAGS+=" -flto" || \
CXXFLAGS+=" -flto=$(getconf _NPROCESSORS_ONLN) -flto-partition=none -fno-fat-lto-objects"
if check_buildoption "lto-thin" "y"; then
[[ "$CC" == "clang" ]] && \
CFLAGS="${CFLAGS// -flto / -flto=thin }" || \
CFLAGS="${CFLAGS// -flto-partition=none / }"
[[ "$CXX" == "clang++" ]] && \
CXXFLAGS="${CXXFLAGS// -flto / -flto=thin }" || \
CXXFLAGS="${CXXFLAGS// -flto-partition=none / }"
fi
LDFLAGS+=" -fuse-linker-plugin $CFLAGS $CXXFLAGS"
LTOPLUGIN="$(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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