[Sheepdog] [PATCH] configure: add urcu into configure

[Liu Yuan]

On 05/08/2012 10:23 PM, Christoph Hellwig wrote:
> On Tue, May 08, 2012 at 04:32:16PM +0800, Liu Yuan wrote:
>> From: Liu Yuan <tailai.ly at taobao.com>
>>
>> It is suppoed to be used by sheepfs. Though sheep doesn't necessarily
>> need this library, its well implemented atomic operation header will
>> be put good use for other sheep code.
> 
> The configure check fails for me on Debian -testing with liburcu
> 0.6.7-2, even if the actual code using it compiles fine after reverting
> the check.  The error message is:
> 
> checking for liburcu... no
> configure: error: Package requirements (liburcu) were not met:
> 
> No package 'liburcu' found
> 
> Consider adjusting the PKG_CONFIG_PATH environment variable if you
> installed software in a non-standard prefix.
> 
> Alternatively, you may set the environment variables liburcu_CFLAGS
> and liburcu_LIBS to avoid the need to call pkg-config.
> See the pkg-config man page for more details.
> 
> Does you check assume librcu prvoiding a .pc file?  At least on my
> systems it doesn't seem to have one.

Yes, the latest urcu code provide a .pc file and it seems that the atomic header structure get
changed over time. Let's stick to the latest new structure and would better write a script to auto
download, compile and install it or point people to where he can finds the latest version to compile.
 
-- 
thanks,
Yuan