Re: [PATCH] devlink: fix libc and kernel headers collision

[Stephen Hemminger <stephen@networkplumber.org>]

On Thu, 30 May 2019 18:32:27 +0300
Baruch Siach <baruch@tkos.co.il> wrote:

> Since commit 2f1242efe9d ("devlink: Add devlink health show command") we
> use the sys/sysinfo.h header for the sysinfo(2) system call. But since
> iproute2 carries a local version of the kernel struct sysinfo, this
> causes a collision with libc that do not rely on kernel defined sysinfo
> like musl libc:
> 
> In file included from devlink.c:25:0:
> .../sysroot/usr/include/sys/sysinfo.h:10:8: error: redefinition of 'struct sysinfo'
>  struct sysinfo {
>         ^~~~~~~
> In file included from ../include/uapi/linux/kernel.h:5:0,
>                  from ../include/uapi/linux/netlink.h:5,
>                  from ../include/uapi/linux/genetlink.h:6,
>                  from devlink.c:21:
> ../include/uapi/linux/sysinfo.h:8:8: note: originally defined here
>  struct sysinfo {
> 		^~~~~~~
> 
> Rely on the kernel header alone to avoid kernel and userspace headers
> collision of definitions.
> 
> Cc: Aya Levin <ayal@mellanox.com>
> Cc: Moshe Shemesh <moshe@mellanox.com>
> Signed-off-by: Baruch Siach <baruch@tkos.co.il>

Ok, applied. Note that musl libc is not officially supported or tested
as part of iproute2. I will take patches to fix build and bugs, but you
are on your own if you must use it.