assert_spec linux build "core init test/stdcxx" create_boot_directory install_config { } build_boot_image { core init test-stdcxx ld.lib.so libc.lib.so libm.lib.so stdcxx.lib.so posix.lib.so } append qemu_args " -nographic " run_genode_until ".*test-stdcxx finished.*\n" 20