ZZ-lto.sh.in


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#!/usr/bin/bash
#
#   ZZ-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' 'lto-clang' 'lto-thin-clang')
buildenv_functions+=('buildenv_lto')

buildenv_lto() {
    if check_buildoption "lto" "y" || check_buildoption "lto-thin" "y" || \
        check_buildoption "lto-clang" "y" || check_buildoption "lto-thin-clang" "y"; then
        ltoflags=" -flto"
        check_buildoption "lto-thin-clang" "y" && ltoflags+="=thin"
        check_buildoption "lto-thin" "y" || check_buildoption "lto" "y" && \
            [[ -f "$(gcc -print-search-dirs | grep install | awk '{print $2 "liblto_plugin.so"}')" ]] && \
            ltoflags+="=auto -fno-fat-lto-objects"
        check_buildoption "lto" "y" && ltoflags+=" -flto-partition=none"

        CFLAGS+="$ltoflags"
        CXXFLAGS+="$ltoflags"
        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
}