Xen users - Jun 2010 - build xen4.0 fail in blktap2 module

uname -a:Linux DC26 2.6.30.10 #1 SMP Wed Jun 2 04:34:53 PDT 2010 i686 i686 i386
GNU/Linux
 OS:CentOS5.5
  
 build xen
 #make all
  
 Errors:
 include -I../../../tools/libxc -I../../../tools/include -I
../../../tools/libaio/src -I ../../../tools/memshr -D_GNU_SOURCE -DUSE_NFS_LOCKS
-DUSE_GCRYPT -c -o tapdisk-queue.o tapdisk-queue.c
In file included from tapdisk-queue.c:44:
libaio-compat.h:82:3: error: #error __NR_eventfd?
make[5]: *** [tapdisk-queue.o] Error 1
make[5]: Leaving directory `/root/xen-4.0.0/tools/blktap2/drivers'
make[4]: *** [subdir-install-drivers] Error 2
make[4]: Leaving directory `/root/xen-4.0.0/tools/blktap2'
make[3]: *** [subdirs-install] Error 2
make[3]: Leaving directory `/root/xen-4.0.0/tools/blktap2'
make[2]: *** [subdir-install-blktap2] Error 2
make[2]: Leaving directory `/root/xen-4.0.0/tools'
make[1]: *** [subdirs-install] Error 2
make[1]: Leaving directory `/root/xen-4.0.0/tools'
make: *** [install-tools] Error 2

 when I cd /root/xen-4.0.0/tools/blktap2
 issue command: make && make install 
 It still told the same error.

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On Wed, Jun 2, 2010 at 12:35 PM, figbin <figbin@qq.com>
wrote:
> uname -a:Linux DC26 2.6.30.10 #1 SMP Wed Jun 2 04:34:53 PDT 2010 i686 i686
> i386 GNU/Linux
> OS:CentOS5.5
>
> build xen
> #make all
Since you use Centos5.5, I actually suggest you do not use Xen 4. Not
unless you REALLY know what you''re doing.

If you do, I''d actually suggest you use several steps:
1. Install xen hypervisor and tools, either using :
- make xen, make tools, make install-xen, make install-tools, OR
- use packages from http://www.gitco.de/repo/
2. Build dom0 kernel separately.
I use kernel from
http://git.kernel.org/?p=linux/kernel/git/jeremy/xen.git;a=shortlog;h=refs/heads/xen/stable-2.6.32.x,
using 2.6.32.13 pv_ops, commit 4dd582f with this config:
http://pastebin.com/5L44xXQj and it builds just fine.

There might be some recent changes in Jeremy''s git tree that prevents
it from building cleany. In that case xen-devel might be a better
place to ask for help. In the mean time you can try a specific commit
and config that is known to work.

-- 
Fajar

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