Re: trouble with installation of systemtap3-0 on Ubuntu 14.04

[David Smith <dsmith at redhat dot com>]

On 01/26/2017 01:38 PM, Arkady wrote:
> On Thu, Jan 26, 2017 at 7:43 PM, David Smith <dsmith@redhat.com> wrote:
>> On 01/26/2017 05:17 AM, Arkady wrote:
>>> Hi,
>>>
>>> This thread is probably the closest to the problem I experience.
>>>
>>> I need --monitor support in the stap. I am trying to compile the 3.0 release
>>> On my Ubuntu 4.4.0-59-generic
>>>
>>> make[3]: Entering directory '/home/arkady/systemtap-3.0/staprun'
>>>   CCLD     stapio
>>> monitor.o: In function `comp_name':
>>> /home/arkady/systemtap-3.0/staprun/monitor.c:151: undefined reference
>>> to `json_object_object_get_ex'
>>> I have ./lib/x86_64-linux-gnu/libjson.a and the library contains
>>> json_object_object_get_ex
>>> ...................
>>>
>>> What am I missing?
>>
>> Am I correct in thinking that libjson is installed in your home
>> directory somewhere and isn't a system library? If so, that might be
>> your problem. We can probably pass more options to configure to add that
>> directory to the link search path.
>>
>> Another possibility is that the link is looking for a shared library
>> (.so) and you've got a static library (.a).
>>
> 
> This is what I have
> /usr/lib/x86_64-linux-gnu/libjson-c.so
> /usr/lib/x86_64-linux-gnu/libjson-c.a
> /usr/lib/x86_64-linux-gnu/libjson-c.so.2

So I was wrong about the library being installed in your home directory.

> Can it be an order of the object files and libraries?

I'd doubt it. I wonder if we've got a json-c version problem. Let's see
if your shared library has that symbol in it. When I run "readelf -Ws"
on mine, I see the following:

====
# readelf -Ws /lib64/libjson-c.so | fgrep json_object_object_get_ex
   115: 0000000000003790    49 FUNC    GLOBAL DEFAULT   11
json_object_object_get_ex
====

What does yours return?

Also, what version of json-c do you have? I've got json-c-0.12-7.

-- 
David Smith
dsmith@redhat.com
Red Hat
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