[lttng-dev] Compilation error while building ust 1.9.4

[Mathieu Desnoyers]

* Harsh Bora (harsh at linux.vnet.ibm.com) wrote:
> On 01/10/2012 01:47 AM, Alexandre Montplaisir wrote:
>> On 12-01-09 02:39 PM, Harsh Bora wrote:
>>> Hi,
>>> While building LTTng ust 1.9.4 with urcu 0.6.6, I get following
>>> compilation errors:
>>
>> Hi,
>> Did you try with the latest URCU (0.6.7) ?
>>
>> I cannot reproduce the problem here with UST 1.9.4 and URCU git head.
>>
>
> Strange, I am getting this error with urcu git head also.

see below,

>
> Harsh
>
>>
>> Alex
>>
>>>
>>>    CC     lttng-probe-ust.lo
>>>    CC     lttng-context-vtid.lo
>>>    CC     lttng-context-vpid.lo
>>>    CC     lttng-context-pthread-id.lo
>>>    CC     lttng-context-procname.lo
>>> In file included from ../include/lttng/ust-events.h:23,
>>>                   from lttng-context-procname.c:12:
>>> /usr/local/include/urcu/hlist.h: In function ‘CDS_INIT_HLIST_HEAD’:
>>> /usr/local/include/urcu/hlist.h:33: error: ‘NULL’ undeclared (first
>>> use in this function)
>>> /usr/local/include/urcu/hlist.h:33: error: (Each undeclared identifier
>>> is reported only once
>>> /usr/local/include/urcu/hlist.h:33: error: for each function it
>>> appears in.)

The version of hlist.h in userspace RCU head has a

#include <stddef.h>

which defines NULL.

I suspect that you still have a stale version in your
/usr/local/include.

Mathieu

>>> make[2]: *** [lttng-context-procname.lo] Error 1
>>> make[2]: Leaving directory `/home/harsh/git-trees/lttng-ust/liblttng-ust'
>>> make[1]: *** [all-recursive] Error 1
>>> make[1]: Leaving directory `/home/harsh/git-trees/lttng-ust'
>>> make: *** [all] Error 2
>>> [harsh at harshbora lttng-ust]$
>>>
>>> Help ?
>>>
>>> - Harsh
>>>
>>
>
>
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-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com