[CRIU] Lots of "conflicting type" errors when trying to build

[Bryan Cattle]

Pavel,
Sure. Do I need to detect a certain glibc version that includes these
types, and disable your definitions if glibc is greater than that version?

Thanks,
Bryan

On Mon, Aug 7, 2017 at 11:15 AM Pavel Emelyanov <xemul at virtuozzo.com> wrote:

> On 08/04/2017 08:55 AM, Bryan Cattle wrote:
> > Hello,
> > I'm trying to build CRIU and getting tons of "conflicting type" errors.
> I'm trying to build using headers from an older kernel than the one running
> on my system. (The reason for this is because I want to run CRIU under a
> user mode kernel.)
> >
> > I'm getting errors like the following:
> >
> >   CC       criu/arch/x86/crtools.o
> > In file included from /usr/include/asm-generic/types.h:6:0,
> >                  from /usr/include/asm/types.h:4,
> >                  from
> /home/ec2-user/linux-4.3.5/include/uapi/linux/types.h:4,
> >                  from /home/ec2-user/linux-4.3.5/include/linux/types.h:5,
> >                  from
> /home/ec2-user/linux-4.3.5/include/uapi/linux/futex.h:5,
> >                  from /home/ec2-user/linux-4.3.5/include/linux/futex.h:4,
> >                  from include/common/lock.h:5,
> >                  from criu/include/restorer.h:13,
> >                  from criu/arch/x86/crtools.c:21:
> > /home/ec2-user/linux-4.3.5/include/asm-generic/int-ll64.h:24:26: error:
> conflicting types for ‘s64’
> >  typedef signed long long s64;
> >                           ^
> > In file included from criu/arch/x86/include/asm/int.h:4:0,
> >                  from criu/arch/x86/include/asm/types.h:9,
> >                  from criu/include/types.h:4,
> >                  from criu/arch/x86/crtools.c:11:
> > criu/include/asm-generic/int.h:7:18: note: previous declaration of ‘s64’
> was here
> >  typedef int64_t  s64;
> >
> > TLDR: the definition of s64 in criu/include/asm-generic/int.h is
> conflicting with the definition in
> linux-4.3.5/include/asm-generic/int-ll64.h.
> >
> > Why is this happening? Does this indicate some sort of incompatibility
> with kernel version 4.3.5?
>
> We've re-defined the needed integer types for criu in internal headers,
> and this error means, that
> the very same types are declared in glibc. It's not incompatibility, it's
> just the need to remove
> the homegrown files with integer types and include proper system-wide ones
> :) Would you be interested
> in submitting such a patch?
>
> > I'm compiling CRIU with the command
> >
> > $ make USERCFLAGS="-I$HOME/include -I$HOME/linux-4.3.5/include/
> -L$HOME/lib"
> >
> > Thanks,
> > Bryan
> >
> >
> >
> >
> > _______________________________________________
> > CRIU mailing list
> > CRIU at openvz.org
> > https://lists.openvz.org/mailman/listinfo/criu
> >
>
>
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