Hi Oliver, Richie, > >> --- /dev/null > >> +++ b/testcases/network/can/filter-tests/can_common.h > >> @@ -0,0 +1,75 @@ > >> +// SPDX-License-Identifier: GPL-2.0-or-later > >> +/* > >> + * Copyright (c) 2021 SUSE LLC > >> + */ > >> + > >> +#include <stdio.h> > >> +#include <stdlib.h> > >> +#include <unistd.h> > >> +#include <string.h> > >> + > >> +#include <sys/types.h> > >> +#include <sys/socket.h> > >> +#include <sys/ioctl.h> > >> +#include <sys/time.h> > >> + > >> +#include "tst_cmd.h" > >> +#include "tst_safe_stdio.h" > >> +#include "tst_safe_file_ops.h" > >> + > >> +#include <linux/if.h> > >> +#include <linux/can.h> > >> +#include <linux/can/raw.h> > >> + > >> +#ifndef IFF_ECHO > >> +# define IFF_ECHO (1<<18) > >> +#endif Thanks a lot, Richie! > > IFF_ECHO was included into Linux 2.6.25 together with the CAN > > subsystem itself. > > So when you run the tests on Kernels < 2.6.25 you don't have CAN > > support and don't need IFF_ECHO too. > Petr, what kernel version and/or distro version did compilation fail on? > There is a small chance someone might be compiling with old kernel > headers relative to their kernel. However it is a challenge to compile > LTP with such an old user land. No, we don't support 2.6.25 :). I was playing with Buildroot distro in my spare time. These embedded toolchains suffer compatibility problems (usually uclibc-ng and sometimes musl lack the support). This problem was when using sourcery-arm-*. But this is definitely not a blocker for this patchset. That lapi is not a must, I can fix it some time later. I usually fix few of these problems before each LTP release. Kind regards, Petr