[sheepdog] [PATCH v4 1/3] modify configure.ac to build sheepdog on rhel5 environment

[Liu Yuan]

On Thu, Aug 22, 2013 at 11:19:01AM +0800, Robin Dong wrote:
> From: Robin Dong <sanbai at taobao.com>
> 
> In our product machine we use rhel5 on 2.6.32-linux-kernel, but sheepdog can't build
> on rhel5. It need some modifications to do this.
> 
> 1. old version autoconf does not support AM_SILENT_RULES() so replace it with check for shell.
> 2. use SIZEOF_SHORT/INT/LONG instead of AC_TYPE_INT16/32/64.
> 3. check header files such as sys/eventfd.h sys/signalfd.h etc.
> 4. use SIZEOF_LONG instead of __SIZEOF_LONG__

Applied this series, thanks

Yuan