Re: PyNGL install

Hi Deepak,

Thanks so much for this great suggestion! I will write a little page about these Mac issues and put it on the pyngl/pynio web page.

--Mary

On Sep 16, 2011, at 11:47 AM, Deepak Chandan wrote:

> Hi Hiro,
> I would like to add something to Mary's detailed instructions below. If you get the same output from file `which python` as that in Mary's email, then you can most likely solve your problems encountered when using the 32 bit PyNGL libraries by trying to execute python as follows:
>
> arch -arch i386 python
>
> This will override the OS's default executable selection hierarchy (which is 64 bit, 32 bit and then ppc) and select the 32 bit executable in the universal binary. Then, I am hopeful that you should be able to import the Nio and Ngl libraries without any problems. If this works, then you don't have to recompile the libraries for 64 bit.
>
> Sincerely,
> Deepak Chandan
>
> PhD Candidate
> Department of Physics, University of Toronto
> 60 St. George Street
> Toronto, ON, M5S1A7, Canada
> Office: MP 619A
> dchandan@atmosp.physics.utoronto.ca
>
>
>
> On 2011-09-16, at 1:37 PM, Mary Haley wrote:
>
>> [Hi Ray, thanks for helping to respond to this.]
>>
>> Hiro,
>>
>> Ray is correct, that it has to do with 32-bit and 64-bit architectures.
>>
>> You can check which type of python you have with:
>>
>> file `which python`
>>
>> On my Mac, this reports:
>>
>> /usr/bin/python: Mach-O universal binary with 3 architectures
>> /usr/bin/python (for architecture x86_64): Mach-O 64-bit executable x86_64
>> /usr/bin/python (for architecture i386): Mach-O executable i386
>> /usr/bin/python (for architecture ppc7400): Mach-O executable ppc
>>
>>
>> This indicates that my default python is a "universal" one, which means it was built for
>> both 32-bit and 64-bit architectures.
>>
>> Unfortunately, you can't use our precompiled PyNGL or PyNIO binaries with a universal
>> Python, because it will fail due to incompatibilities. Our binaries are built for one
>> archictecture only.
>>
>> So, if your python reports that you have a universal binary as well, then you will need to
>> build your own version of python for the architecture you want, and then you can build
>> PyNGL from scratch or use a precompiled binary.
>>
>> I know this is a pain, and I wish we didn't have to require it. But, the internal code that PyNGL
>> and PyNIO is dependent on doesn't build in universal mode (yet, maybe someday).
>>
>> If you want to go down the route of building your own Python, I'll be happy to help.
>>
>> Here are the settings I used to build Python 2.7.1 on my Mac system:
>>
>> setenv CC gcc
>> setenv CXX g++
>> setenv FC gfortran
>> setenv F77 gfortran
>> setenv CFLAGS '-m64 -fPIC'
>> setenv FFLAGS '-m64 -fPIC'
>> setenv F90FLAGS '-m64 -fPIC'
>> setenv CXXFLAGS '-m64 -fPIC'
>> setenv MACOSX_DEPLOYMENT_TARGET 10.6
>>
>> --Mary
>>
>>
>> On Sep 16, 2011, at 8:52 AM, Raymond P. wrote:
>>
>>> You use the command line command otool on the object you want
>>> information on. Type "man otool" to get the options. You
>>> can run it on any library file (*.so) Ngl uses, to see what version
>>> you have.
>>>
>>>
>>> On Sep 16, 2011, at 8:51 AM, Hiroyuki Kurokawa wrote:
>>>
>>>> Thank you for information.
>>>> I have used 32 bit version of PyNGL.
>>>> In this case, I would be using 64 bit version of python?
>>>> Where can I check the version?
>>>>
>>>> Sorry for stupid question..
>>>>
>>>> Thanks,
>>>> Hiro
>>>>
>>>> On 2011/09/16, at 13:52, Raymond P. wrote:
>>>>
>>>>> I believe this means that you have installed a 32 bit PyNGL, but
>>>>> are using a 64-bit version of Python. It is very confusing, since even
>>>>> when you are running a 32 bit version of the operating system, you
>>>>> can install and run 64 bit applications. You get the same error message
>>>>> if you are using a 32 bit Python but have erroneously installed a 64 bit
>>>>> PyNGL. You can find out what kind of PyNGL you installed by running
>>>>> otool on fplib.so .
>>>>>
>>>>> --Ray Pierrehumbert
>>>>>
>>>>>
>>>>> Life will be much better when things settle down enough that everything
>>>>> is 64-bit.
>>>>> On Sep 16, 2011, at 6:36 AM, Hiroyuki Kurokawa wrote:
>>>>>
>>>>>> Hello,
>>>>>>
>>>>>> Now I'm trying to install PyNGL from binary file.
>>>>>> My PC is Mac OS X 10.6.8, 32bit system.
>>>>>> When I check whether it is installed successfully by type "import Ngl" on Python,
>>>>>> There are error messages shown below.
>>>>>>
>>>>>>>>> import Ngl
>>>>>> Traceback (most recent call last):
>>>>>> File "<stdin>", line 1, in <module>
>>>>>> File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/PyNGL/Ngl.py", line 39, in <module>
>>>>>> import fplib
>>>>>> ImportError: dlopen(/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/PyNGL/fplib.so, 2): no suitable image found. Did find:
>>>>>> /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/PyNGL/fplib.so: mach-o, but wrong architecture
>>>>>>
>>>>>> I could not understand this error.
>>>>>> Is this error to install PyNGL?
>>>>>> Or should I check python or some other settings?
>>>>>>
>>>>>> Thanks,
>>>>>>
>>>>>> Hiroyuki Kurokawa
>>>>>>
>>>>>> ----------------------------------------------------------------------------------------
>>>>>> Hiroyuki Kurokawa
>>>>>> Tokyo Institute of Technology & Max-Planck Institute for Astronomy
>>>>>> PhD student
>>>>>> email:kurokawa@geo.titech.ac.jp
>>>>>> ----------------------------------------------------------------------------------------
>>>>>>
>>>>>>
>>>>>>
>>>>>>
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Received on Fri Sep 16 13:47:49 2011