On Tue, Feb 17, 2009 at 09:03:18AM +0100, cnav wrote:
> Jacob Meuser wrote:
>> On Mon, Feb 16, 2009 at 09:06:25AM -0800, patrick keshishian wrote:
>>> man cc
>>> /-pthread
>>> nn
>>>
>>> -pthreads
>>> Add support for multithreading using the POSIX threads
>>> library. This option sets flags for both the
>>> preprocessor and linker. This option does not affect
>>> the thread safety of object code produced by the
>>> compiler or that of libraries supplied with it.
>>>
>>
>> that doesn't answer the questions.
>>
>>> On Mon, Feb 16, 2009 at 5:32 AM, cnav <[email protected]> wrote:
>>>> Hi,
>>>>
>>>> I just applied following patch:
>>>> http://cnav.pl/clamav-configure.patch
>>>>
>>>> to clamav sources. And after that libclamav seems to work with pthreads.
>>>> ldd /usr/local/lib/libclamav.so.5.4
>>>> /usr/local/lib/libclamav.so.5.4:
>>>> Start End Type Open Ref GrpRef Name
>>>> 084ef000 28522000 dlib 1 0 0 /usr/local/lib/libclamav.so.5.4
>>>> 0d4b9000 2d4bd000 rlib 0 1 0
>>>> /usr/local/lib/libclamunrar_iface.so.5.4
>>>> 010a0000 210a5000 rlib 0 2 0 /usr/local/lib/libclamunrar.so.5.4
>>>> 06d89000 26d8d000 rlib 0 1 0 /usr/local/lib/libbz2.so.10.4
>>>> 091a8000 291af000 rlib 0 1 0 /usr/local/lib/libgmp.so.7.1
>>>> 0a04b000 2a12a000 rlib 0 1 0 /usr/local/lib/libiconv.so.5.0
>>>> 02484000 2248d000 rlib 0 1 0 /usr/lib/libpthread.so.11.0
>>>> 05a7c000 25a84000 rlib 0 3 0 /usr/lib/libz.so.4.1
>>>>
>>>> Manuals says to use -pthread.
>>>> http://www.openbsd.org/cgi-bin/man.cgi?query=pthreads&sektion=3
>>>>
>>>> My question are:
>>>> What is the difference between those two libs ?
>>>> And why with -lpthread it's working and without not?
>>
>> -pthread won't link libpthread into shared objects, while -lpthread
>> will. use -pthread when linking the executables that will load
>> libclamav.
>>
> Thanks,
>
> The only one reason why i did it, is that i want to use perl module
> mail-clamav witch is depending pthreads libraries.
>
> When i am compiling libclamav with -pthread instead of -lpthread:
> The following error exists:
>
> Mail-ClamAV-0.22# make test
> PERL_DL_NONLAZY=1 /usr/bin/perl "-MExtUtils::Command::MM" "-e"
> "test_harness(0, 'blib/lib', 'blib/arch')" t/*.t
> t/Mail-ClamAV..../usr/bin/perl:/usr/local/lib/libclamav.so.5.4:
> undefined symbol 'pthread_create'
> /usr/bin/perl:/usr/local/lib/libclamav.so.5.4: undefined symbol
> 'pthread_getspecific'
> /usr/bin/perl:/usr/local/lib/libclamav.so.5.4: undefined symbol
> 'pthread_key_delete'
> /usr/bin/perl:/usr/local/lib/libclamav.so.5.4: undefined symbol
> 'pthread_once'
> /usr/bin/perl:/usr/local/lib/libclamav.so.5.4: undefined symbol
> 'pthread_key_create'
> /usr/bin/perl:/usr/local/lib/libclamav.so.5.4: undefined symbol
> 'pthread_mutex_unlock'
> /usr/bin/perl:/usr/local/lib/libclamav.so.5.4: undefined symbol
> 'pthread_mutex_lock'
> /usr/bin/perl:/usr/local/lib/libclamav.so.5.4: undefined symbol
> 'pthread_join'
> /usr/bin/perl:/usr/local/lib/libclamav.so.5.4: undefined symbol
> 'pthread_setspecific'
>
> I am aware that you maybe not familiar with mail-clamav, but libclamav
> at least should work fine with pthreads (-pthread) correctly ?
no, because libclmav is a shared object, so -pthread doesn't pull
in libpthread.
> Please, if any of you can help me understand it, it will be much
> helpful. (Or at least can you give me some directions where to search
> to.)
I *think* you need to change ClamAV.pm to have -pthread in LIBS like
use Inline C => Config =>
VERSION => $VERSION,
PREFIX => 'clamav_perl',
NAME => "Maile::ClamAV",
LIBS => "-lclamav -pthread";
but I honestly don't know much about how perl modules are supposed to
be built.
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