install libelf-dev
To try to avoid this message during build: warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel <https://gitlab.com/freifunk-region/stuttgart/site/-/jobs/200400306>
To try to avoid this message during build: warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel <https://gitlab.com/freifunk-region/stuttgart/site/-/jobs/200400306>