On 2012-02-07 17:19, Gilles Chanteperdrix wrote:
> On 02/01/2012 09:21 PM, Gilles Chanteperdrix wrote:
>> On 02/01/2012 04:50 PM, Jan Kiszka wrote:
>>> On 2012-02-01 16:38, Gilles Chanteperdrix wrote:
>>>> On 02/01/2012 04:25 PM, Jan Kiszka wrote:
>>>>> On 2012-02-01 16:17, Gilles Chanteperdrix wrote:
>>>>>> On 02/01/2012 03:37 PM, Jan Kiszka wrote:
>>>>>>> Hi,
>>>>>>>
>>>>>>> don't remember anymore: Is there any subtle reason that prevent a
>>>>>>> change like
>>>>>>>
>>>>>>> diff --git a/src/skins/native/Makefile.am b/src/skins/native/Makefile.am
>>>>>>> index 39eaaed..4cc8859 100644
>>>>>>> --- a/src/skins/native/Makefile.am
>>>>>>> +++ b/src/skins/native/Makefile.am
>>>>>>> @@ -22,6 +22,9 @@ libnative_la_SOURCES = \
>>>>>>>         wrappers.c \
>>>>>>>         wrappers.h
>>>>>>>  
>>>>>>> +libnative_la_LIBADD = \
>>>>>>> +       ../common/libxenomai.la
>>>>>>> +
>>>>>>>  libnative_la_CPPFLAGS = \
>>>>>>>         @XENO_USER_CFLAGS@ \
>>>>>>>         -I$(top_srcdir)/include
>>>>>>> diff --git a/src/skins/rtdm/Makefile.am b/src/skins/rtdm/Makefile.am
>>>>>>> index 8ad74be..2dc0a90 100644
>>>>>>> --- a/src/skins/rtdm/Makefile.am
>>>>>>> +++ b/src/skins/rtdm/Makefile.am
>>>>>>> @@ -8,6 +8,9 @@ librtdm_la_SOURCES = \
>>>>>>>         core.c \
>>>>>>>         init.c
>>>>>>>  
>>>>>>> +librtdm_la_LIBADD = \
>>>>>>> +       ../common/libxenomai.la
>>>>>>> +
>>>>>>>  librtdm_la_CPPFLAGS = \
>>>>>>>         @XENO_USER_CFLAGS@ \
>>>>>>>         -I$(top_srcdir)/include
>>>>>>> diff --git a/src/testsuite/latency/Makefile.am 
>>>>>>> b/src/testsuite/latency/Makefile.am
>>>>>>> index c772c26..6534df5 100644
>>>>>>> --- a/src/testsuite/latency/Makefile.am
>>>>>>> +++ b/src/testsuite/latency/Makefile.am
>>>>>>> @@ -14,5 +14,4 @@ latency_LDFLAGS = @XENO_USER_LDFLAGS@
>>>>>>>  latency_LDADD = \
>>>>>>>         ../../skins/native/libnative.la \
>>>>>>>         ../../skins/rtdm/librtdm.la \
>>>>>>> -       ../../skins/common/libxenomai.la \
>>>>>>>         -lpthread -lm
>>>>>>>
>>>>>>> i.e. that we let the skin libraries depend on libxenomai and then remove
>>>>>>> the explicit dependency from our binaries and the xeno-config output?
>>>>>>> Is there some ordering issue again (we have -l<skin> before -lxenomai
>>>>>>> in the ldflags).
>>>>>>>
>>>>>>> If possible, this would allow for things like dlopen("libnative.so").
>>>>>>
>>>>>> It allows xeno-config result to work both with dynamic and static
>>>>>> libraries. Static libraries have no dependency system, so, when linking
>>>>>> a program whith libnative.a for instance, without libtool, you still
>>>>>> have to link it with libxenomai.a.
>>>>>
>>>>> OK, part two could stay, but the dependencies should still be added to
>>>>> the skin libs - if possible.
>>>>>
>>>>>>
>>>>>> How come you can not dlopen libnative.so, dlopening libxenomai.so before
>>>>>> does not work?
>>>>>
>>>>> Dependencies of libnative on libxenomai are not resolved when you open
>>>>> the former even if the latter is already loaded. Maybe you can do this
>>>>> by pulling in all required symbols one by one manually, haven't tried
>>>>> yet. But that would at least be unhandy.
>>>>
>>>> What about RTLD_GLOBAL ?
>>>>
>>>
>>> Was possibly the reason, need to check back.
>>>
>>> Still, what prevents stating the existing dependency of lib<skin> on
>>> libxenomai? The dance above would than be obsolete.
>>
>> The change is merged. I took the chance to check that static build still
>> built.
>>
> 
> Unfortunately this change also causes a build failure when
> cross-compiling for ARM, so, change reverted, too.
> 

Indeed unfortunate. Any pointers to logs?

Jan

-- 
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux

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