| From | Willem de Bruijn <> | Date | Sun, 6 Aug 2017 16:23:16 -0400 | Subject | Re: [PATCH v06 18/36] uapi linux/errqueue.h: include linux/time.h in user space |
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On Sun, Aug 6, 2017 at 12:44 PM, Mikko Rapeli <mikko.rapeli@iki.fi> wrote: > linux/time.h conflicts with user space header time.h. Try to be compatible > with both. > > Fixes userspace compilation error: > > error: array type has incomplete element type > struct timespec ts[3]; > > Signed-off-by: Mikko Rapeli <mikko.rapeli@iki.fi> > Cc: Willem de Bruijn <willemb@google.com> > Cc: Soheil Hassas Yeganeh <soheil@google.com> > Cc: netdev@vger.kernel.org > --- > include/uapi/linux/errqueue.h | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/include/uapi/linux/errqueue.h b/include/uapi/linux/errqueue.h > index 07bdce1f444a..b310b2c6d94f 100644 > --- a/include/uapi/linux/errqueue.h > +++ b/include/uapi/linux/errqueue.h > @@ -3,6 +3,12 @@ > > #include <linux/types.h> > > +#ifdef __KERNEL__ > +#include <linux/time.h> > +#else > +#include <time.h> > +#endif /* __KERNEL__ */
This will break applications that include <linux/time.h> manually.
I previously sent a patch to use libc-compat to make compilation succeed when both are included in the case where <linux/time.h> is included after <time.h>.
https://lkml.org/lkml/2016/9/12/872
The inverse will require changes to the libc header to avoid redefining symbols already defined by <linux/time.h>
The second patch in that 2-patch set included <linux/time.h> unconditionally after the fix. This broke builds that also included <time.h> in the wrong order. I did not resubmit the first patch as a stand-alone, as it is not sufficient to avoid breakage.
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