Add buildroot support

Hopefully in a commit in the not-too-distant future, we can
remove most or all of build-rootfs.sh in favor of buildroot.

Signed-off-by: Brian Cain <[email protected]>

Dockerfile

@@ -75,6 +75,7 @@ ENV MUSL_SRC_URL https://github.com/quic/musl/archive/d125203fcb134febcde6ca3218
 ENV HEXMVM_SRC_URL https://github.com/quic/hexagonMVM/archive/v0.1.1.tar.gz
 ENV LINUX_SRC_URL https://cdn.kernel.org/pub/linux/kernel/v6.x/linux-6.7.11.tar.xz
 ENV BUSYBOX_SRC_URL https://busybox.net/downloads/busybox-1.36.1.tar.bz2
+ENV BUILDROOT_SRC_URL https://github.com/quic/buildroot/archive/hexagon-2024.10.18a.tar.gz
 
 #ENV PYTHON_SRC_URL https://www.python.org/ftp/python/3.9.5/Python-3.9.5.tar.xz
 #ADD get-host-clang-cmake-python.sh /root/hexagon-toolchain/get-host-clang-cmake-python.sh
@@ -91,6 +92,9 @@ ENV IN_CONTAINER 1
 ADD build-toolchain.sh /root/hexagon-toolchain/build-toolchain.sh
 RUN cd /root/hexagon-toolchain && ./build-toolchain.sh ${ARTIFACT_TAG}
 
+ADD build-buildroot.sh /root/hexagon-toolchain/build-buildroot.sh
+RUN cd /root/hexagon-toolchain && ./build-buildroot.sh
+
 ARG TEST_TOOLCHAIN=1
 
 ADD build-rootfs.sh /root/hexagon-toolchain/build-rootfs.sh

build-buildroot.sh

@@ -0,0 +1,22 @@
+#!/bin/bash
+
+#  Copyright (c) 2024, Qualcomm Innovation Center, Inc. All rights reserved.
+#  SPDX-License-Identifier: BSD-3-Clause
+
+set -euo pipefail
+
+BASE=$(readlink -f ${PWD})
+
+set -x
+TOOLCHAIN_INSTALL_REL=${TOOLCHAIN_INSTALL}
+TOOLCHAIN_INSTALL=$(readlink -f ${TOOLCHAIN_INSTALL})
+TOOLCHAIN_BIN=${TOOLCHAIN_INSTALL}/x86_64-linux-gnu/bin
+export PATH=${TOOLCHAIN_BIN}:${PATH}
+
+# TODO: change build to use unprivileged user
+export FORCE_UNSAFE_CONFIGURE=1
+
+make -C buildroot/ O=../obj_buildroot/ qcom_dsp_qemu_defconfig
+cd obj_buildroot
+make -j
+install -D ./images/* ${ARTIFACT_BASE}/${ARTIFACT_TAG}/

get-src-repos.sh

@@ -14,6 +14,7 @@ git clone --depth=1 -q git://git.kernel.org/pub/scm/linux/kernel/git/stable/linu
 git clone --depth=1 -q https://github.com/python/cpython &
 git clone --depth=1 -q git://repo.or.cz/libc-test &
 git clone -q https://git.busybox.net/busybox/ &
+git clone -q https://github.com/quic/buildroot/ &
 
 
 git clone -q --branch=hexagon https://github.com/quic/musl &

get-src-tarballs.sh

@@ -47,6 +47,13 @@ get_src_tarballs() {
 	echo ${MUSL_SRC_URL} > ${MANIFEST_DIR}/musl.txt
 	cd -
 
+	wget --quiet ${BUILDROOT_SRC_URL} -O buildroot.tar.xz
+	mkdir buildroot
+	cd buildroot
+	tar xf ../buildroot.tar.xz --strip-components=1
+	echo ${BUILDROOT_SRC_URL} > ${MANIFEST_DIR}/buildroot.txt
+	cd -
+
 	wget --quiet ${LINUX_SRC_URL} -O linux.tar.xz
 	mkdir linux
 	cd linux