From: Paul H. Hargrove (PHHargrove_at_lbl_dot_gov)
Date: Tue Feb 10 2009 - 11:04:32 PST
Try adding "-ldl" to the end of the gcc command line to link libdl. If
you then get undefined references to pthread symbols, add "-lpthread" as
well.
-Paul
Andrea Autiero S143785 wrote:
> i've tryed it again but this is the answer:
>
> andrea@chisone:~/Desktop/materiale_tesi> gcc -o new_static matrix.c -static
> -L/usr/local/lib/ -lcr_run -u cr_run_link_me
> /usr/local/lib//libcr_run.a(libcr_run_la-cr_run.o): In function `cri_init':
> /home/andrea/Desktop/blcr-0.7.3/builddir/libcr/../../libcr/cr_libinit.c:148:
> undefined reference to `dlopen'
> /home/andrea/Desktop/blcr-0.7.3/builddir/libcr/../../libcr/cr_libinit.c:151:
> undefined reference to `dlsym'
> /home/andrea/Desktop/blcr-0.7.3/builddir/libcr/../../libcr/cr_libinit.c:152:
> undefined reference to `dlclose'
> collect2: ld returned 1 exit status
>
> is a problem of my system??i'm not very skilled on linux..
>
> thank you
> Andrea
>
> On Mon, 09 Feb 2009 14:23:34 -0800, "Paul H. Hargrove" <PHHargrove_at_lbl_dot_gov>
> wrote:
>
>> Andrea,
>>
>> Please reread the "Cautionary Linker Notes" in the BLCR User's Guide.
>> I beleive you need a "-u cr_link_me" argument when building your
>> application "static_2" with libcr.a. Note also that "-u cr_run_link_me
>> -lcr_run" may be better than "-u cr_link_me -lcr" because libcr_run.a
>> contains only the code that the cr_run utility would insert into a
>> dynamically linked executable, while libcr.a contains additional code
>> that is unnecessary for this basic usage.
>>
>> Continue to let us know if you need assistance.
>>
>> -Paul
>>
>> Andrea Autiero S143785 wrote:
>>
>>> all right..
>>> i've compiled blcr with the following options:
>>>
>>> sudo ../configure --host=ppc-linux --prefix=/ppc_blcr/builddir/
>>>
>>>
> --with-system-map=/home/andrea/Desktop/programmi_per_tesi/linux-2.6.18/System.map
>
>>> --with-linux=/home/andrea/Desktop/programmi_per_tesi/linux-2.6.18/
>>> --enable-all-static --enable-static cross_signum=64
>>> cross_stack_direction=-1
>>>
>>> make
>>>
>>> make install DESTDIR=/ppc_blcr/builddir
>>>
>>> then i've compiled my application:
>>>
>>> source /home/andrea/Desktop/programmi_per_tesi/eldk/eldk_init 4xx
>>> ${CROSS_COMPILE}gcc -o static_2 matrix.c -static
>>> -L/ppc/blcr_builddir/lib/
>>> -lcr
>>>
>>> after that i've put file in ppc_blcr/builddir and my application in the
>>> filesystem of my virtual ppc on simics
>>>
>>> it start and i initalize the library (trying launch cr_checkpoint --help
>>> works!!)
>>> then i launch
>>>
>>> ./static_2 &
>>> ps
>>> cr_checkpoint pid_of_static_2
>>>
>>> and i see on the screen:
>>>
>>> blcr: retry request on -CR_ENOSUPPORT
>>> Checkpoint failed: support missing from application
>>>
>>> now what can i do??is it possible to make it work??
>>> thank you
>>> andrea autiero
>>>
>>> On Thu, 29 Jan 2009 10:57:56 -0800, "Paul H. Hargrove"
>>> <PHHargrove_at_lbl_dot_gov>
>>> wrote:
>>>
>>>
>>>> Andrea,
>>>>
>>>> As Karthik says, you will at least need to configure BLCR
>>>> --enable-static to ensure static libraries are built (by default only
>>>> shared libs are built). However, that alone is not sufficient because
>>>> the "cr_run" utility only operates on dynamically linked executables.
>>>> So, if "my_app" was compiled -static, "cr_run my_app" will not load the
>>>>
>
>
>>>> BLCR support into the application regardless of whether the static
>>>> libraries have been built. For the case of a statically linked
>>>> executable, one needs to link in BLCR support when the application is
>>>> built, rather than at run time via "cr_run". Please see section "4.2
>>>> Making an application checkpointable" in the BLCR Users Guide (in the
>>>> doc/html directory of the BLCR distribution, or online at
>>>> http://mantis.lbl.gov/blcr/doc/html/BLCR_Users_Guide.html ). You
>>>> probably want option #2 in that section, and should read the
>>>>
> "Cautionary
>
>>>> linker notes" at the end of that section. If you still have problems,
>>>> please let us know and we'll try to help.
>>>>
>>>> -Paul
>>>>
>>>> Karthik Gopalakrishnan wrote:
>>>>
>>>>
>>>>> Did you configure BLCR with "--enable-static"?
>>>>>
>>>>> On Thu, Jan 29, 2009 at 5:40 AM, Andrea Autiero S143785
>>>>> <[email protected]> wrote:
>>>>>
>>>>>
>>>>>
>>>>>> goodmorning
>>>>>> i'm an italian student trying to run your library in one embedded
>>>>>>
>>>>>>
>>> system
>>>
>>>
>>>>>> (by now is just virtual)
>>>>>> i'm simuling one ebony board (ppc-4xx) whith 2.6.18 linux kernel on
>>>>>>
> it
>
>>>>>> i've cross-compiled the library and it seems to work on the target
>>>>>> system,
>>>>>> but i cant launch any application
>>>>>> linked with the lib
>>>>>> i must compile the executable with gcc -static and i think i need
>>>>>> libcr.a
>>>>>> how i could have it??could you help me?
>>>>>> running cr_run myapp & and then cr_checpoint doesn't work
>>>>>> it says to me "missing support from application"
>>>>>> hope to have one answer and thnak you
>>>>>> Andrea Autiero
>>>>>> Politecnico di Torino
>>>>>>
>>>>>>
>>>>>>
>>>>>>
--
Paul H. Hargrove PHHargrove_at_lbl_dot_gov
Future Technologies Group Tel: +1-510-495-2352
HPC Research Department Fax: +1-510-486-6900
Lawrence Berkeley National Laboratory