[pypy-dev] Problems in connecting C++ and python with cppyy

[Xia Xin]

Hi,

I am sure /home/GeV/work/hello/v1/src is the current and only work directory.

$ ldd libMyClassDict.so
linux-vdso.so.1 =>  (0x00007fff9e598000)
libReflex.so.0 => /opt/root/lib/root/libReflex.so.0 (0x00007f7f2e4ec000)
libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6 (0x00007f7f2e1d0000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1 (0x00007f7f2dfb9000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f7f2dbfa000)
libdl.so.2 => /lib/x86_64-linux-gnu/libdl.so.2 (0x00007f7f2d9f6000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f7f2d6f9000)
/lib64/ld-linux-x86-64.so.2 (0x00007f7f2e98e000)

All needed libraries exist. Errors occur only when I try to use
automatic class loader.


Best regards,
Xia Xin

2013/5/25  <wlavrijsen at lbl.gov>:
> Hi,
>
>
>> 1.
>>
>> $ echo $LD_LIBRARY_PATH
>> /home/GeV/work/hello/v1/src:/opt/root/lib/root
>>
>> $ ls /home/GeV/work/hello/v1/src
>> libMyClassDict.rootmap  libMyClassDict.so  MyClass.h
>> MyClass_rflx.cpp
>>
>>>>>> import cppyy
>>>>>> myinst = cppyy.gbl.MyClass(42)
>>
>> Traceback (most recent call last):
>>  File "<stdin>", line 1, in <module>
>> AttributeError: <class '__main__.::'> object has no attribute
>> 'MyClass' (details: '<class '__main__.::'>' has no attribute
>> 'MyClass')
>>
>> 2. TRY explicit load statements, Just as that Armin told me, It's OK,
>> works perfectly
>>
>> $ echo $LD_LIBRARY_PATH
>> /opt/root/lib/root
>>
>>>>>> import cppyy
>>>>>> cppyy.load_reflection_info("./libMyClassDict.so")
>>>>>> myinst = cppyy.gbl.MyClass(42)
>>
>> 42
>>
>> 3. Use LD_LIBRARY_PATH to clarify the path to libMyClassDict.so, still
>> error
>>
>> $ echo $LD_LIBRARY_PATH
>> /home/GeV/work/hello/v1/src:/opt/root/lib/root
>>
>>>>>> import cppyy
>>>>>> cppyy.load_reflection_info("libMyClassDict.so")
>>
>> Traceback (most recent call last):
>>  File "<stdin>", line 1, in <module>
>> RuntimeError: libMyClassDict.so: cannot open shared object file: No
>> such file or directory
>>
>>
>> I don't understand why the LD_LIBRARY_PATH did not work well on my PC.
>
>
> neither do I, unless /home/GeV/work/hello/v1/src is not the current work
> directory and you have two libMyClassDict.so.
>
> What does:
>
>  $ ldd /home/GeV/work/hello/v1/src/libMyClassDict.so
>
> give? Any libraries to be linked not found?
>
> Best regards,
>
>            Wim
> --
> WLavrijsen at lbl.gov    --    +1 (510) 486 6411    --    www.lavrijsen.net