Added a shell script that generates a Buildroot pre-built image ready…

… to compile the upstream version of radvd.

Signed-off-by: RICCIARDI-Adrien <[email protected]>

build-image.sh

@@ -0,0 +1,71 @@
+#!/bin/sh
+
+# Exit if any error occurs
+set -e
+
+PrintMessage()
+{
+	printf "\033[33m--> $1\033[0m\n"
+}
+
+BUILDROOT_VERSION=2021.02.7
+
+# Check arguments
+if [ $# -ne 3 ]
+then
+	echo "Usage : $0 buildroot_defconfig_name libc_name output_directory"
+	echo "  buildroot_defconfig_name : see all available defconfigs here https://git.busybox.net/buildroot/tree/configs?h=${BUILDROOT_VERSION}"
+	echo "  libc_name : must be \"glibc\", \"uclibc\" or \"musl\""
+	echo "  output_directory : will contain the build directory and the final compressed artifacts"
+	exit 1
+fi
+DEFCONFIG_NAME="$1"
+LIBC_NAME="$2"
+OUTPUT_DIRECTORY="$3"
+
+# Create the build directory name
+BUILD_DIRECTORY_NAME="buildroot-${DEFCONFIG_NAME}-${LIBC_NAME}"
+BUILD_DIRECTORY_PATH=$(realpath "${OUTPUT_DIRECTORY}")/"${BUILD_DIRECTORY_NAME}"
+
+PrintMessage "Removing previous build artifacts..."
+rm -rf "${BUILD_DIRECTORY_PATH}"
+
+PrintMessage "Downloading Buildroot sources..."
+git clone --depth=1 --branch="${BUILDROOT_VERSION}" https://github.com/buildroot/buildroot "${BUILD_DIRECTORY_PATH}"
+
+PrintMessage "Modifying the radvd Buildroot package to use upstream sources..."
+RADVD_PACKAGE_PATH="${BUILD_DIRECTORY_PATH}/package/radvd"
+# Do not check for package hash, so there is no need to compute it
+rm "${RADVD_PACKAGE_PATH}/radvd.hash"
+# Get the package sources from the head of the master branch
+sed -i '/RADVD_SITE =/c\\RADVD_SITE = https://github.com/radvd-project/radvd' "${RADVD_PACKAGE_PATH}/radvd.mk"
+sed -i '9iRADVD_SITE_METHOD = git' "${RADVD_PACKAGE_PATH}/radvd.mk"
+# Autotools "configure" script is missing, tell Buildroot to generate it before building
+sed -i '18iRADVD_AUTORECONF = YES' "${RADVD_PACKAGE_PATH}/radvd.mk"
+
+PrintMessage "Enabling radvd build in Buildroot configuration..."
+echo "BR2_PACKAGE_RADVD=y" >> "${BUILD_DIRECTORY_PATH}/configs/${DEFCONFIG_NAME}"
+
+PrintMessage "Selecting the ${LIBC_NAME} C library..."
+case $LIBC_NAME in
+	"glibc")
+		echo "BR2_TOOLCHAIN_BUILDROOT_GLIBC=y" >> "${BUILD_DIRECTORY_PATH}/configs/${DEFCONFIG_NAME}"
+		;;
+	"uclibc")
+		echo "BR2_TOOLCHAIN_BUILDROOT_UCLIBC=y" >> "${BUILD_DIRECTORY_PATH}/configs/${DEFCONFIG_NAME}"
+		;;
+	"musl")
+		echo "BR2_TOOLCHAIN_BUILDROOT_MUSL=y" >> "${BUILD_DIRECTORY_PATH}/configs/${DEFCONFIG_NAME}"
+		;;
+	*)
+		echo "Unknown C library, please specify \"glibc\", \"uclibc\" or \"musl\"."
+		exit 1
+		;;
+esac
+
+PrintMessage "Generating the Buildroot configuration..."
+cd "${BUILD_DIRECTORY_PATH}"
+make "${DEFCONFIG_NAME}"
+
+PrintMessage "Building the Buildroot image..."
+make