[Numpy-discussion] Calling routines from a Fortran library using python
Mon Feb 22 07:57:14 CST 2010
On Mon, 22 Feb 2010 22:18:23 +0900
David Cournapeau <firstname.lastname@example.org> wrote:
> On Mon, Feb 22, 2010 at 10:01 PM, Nils Wagner
> <email@example.com> wrote:
>> ar x test.a
>> gfortran -shared *.o -o libtest.so -lg2c
>> to build a shared library. The additional option -lg2c
>> necessary due to an undefined symbol: s_cmp
> You should avoid the -lg2c option at any cost if
> gfortran. I am afraid that you got a library compiled
>with g77. If
> that's the case, you should use g77 and not gfortran.
>You cannot mix
> libraries built with one with libraries with another.
g77 -shared *.o -o libtest.so -lg2c
cannot find -lgcc_s
IIRC that is a known bug related to SuSE .
Are you aware of a solution ?
>> Now I am able to load the shared library
>> from ctypes import *
>> my_lib = CDLL('test.so')
>> What are the next steps to use the library functions
>> within python ?
> You use it as you would use a C library:
> But the fortran ABI, at least for code built with g77
> pass everything by reference. To make sure to pass the
> arguments, I strongly suggest to double check with the
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