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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 "$LIBRARY/util/option.sh"
build_options+=('lto' 'lto-thin')
buildenv_functions+=('buildenv_lto')
buildenv_lto() {
if check_buildoption "lto" "y" || check_buildoption "lto-thin" "y" && \
[[ -f "$(gcc -print-search-dirs | grep install | awk '{print $2 "liblto_plugin.so"}')" ]]; then
[[ "$CC" == "clang" || "$CXX" == "clang++" ]] && \
ltoflags=" -flto" || \
ltoflags=" -flto=$(getconf _NPROCESSORS_ONLN) -flto-partition=none -fno-fat-lto-objects"
if check_buildoption "lto-thin" "y"; then
[[ "$CC" == "clang" || "$CXX" == "clang++" ]] && \
ltoflags="${ltoflags// -flto/ -flto=thin}" || \
ltoflags="${ltoflags// -flto-partition=none / }"
fi
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
}
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