FROM scratch as base
ENV VERSION=2.4.6
ENV SRC_HASH=7c87a8c2c8c0fc9cd5019e402bed4292462d00a718a7cd5f11218153bf28b26f
ENV SRC_FILE=libtool-${VERSION}.tar.xz
ENV SRC_SITE=https://ftp.gnu.org/gnu/libtool/${SRC_FILE}

FROM base as fetch
ADD --checksum=sha256:${SRC_HASH} ${SRC_SITE} .

FROM fetch as build
COPY --from=busybox . /
COPY --from=gcc . /
COPY --from=binutils . /
COPY --from=make . /
COPY --from=musl . /
COPY --from=m4 . /
RUN tar -xf ${SRC_FILE}
WORKDIR libtool-${VERSION}
RUN --network=none <<-EOF
	set -eux
	./configure \
		--prefix=/usr; \
	make
EOF

FROM build as install
RUN --network=none <<-EOF
	make DESTDIR=/rootfs install
EOF
RUN find /rootfs -exec touch -hcd "@0" "{}" +

FROM scratch as package
COPY --from=install /rootfs /