[Pyrex] [Mac Inter Core Duo OS 10.4.9 ] compiler complains about pyrex created .h

[Lenard Lindstrom]

David Goldsmith wrote:
> I googled Pyrex: "parse error before '(' token" and hit an archived 
> SciPy post; the message following the relevant post - it was unclear 
> whether it was next in thread, next in time, or both - suggested that 
> the problem might be an out-dated Numeric.  Have you all updated to 
> numpy, and if not, if I don't have Numeric, only numpy, could that be 
> the (or will that be a) problem?
>
> DG
>
>   
This is nothing to do with Numeric. See below.


> David Goldsmith wrote:
>   
>> OK, making progress: I can get a python program to use my function 
>> defined in pyrex.  However, when I try to compile a c file in which 
>> I've included the header pyrex produced (because I made a function 
>> public so that I could call the function in a c program), the compiler 
>> complains:
>>
>> In file included from tempSolveSAC.c:2:
>> SolveSAC_Wrap.h:6: error: parse error before '(' tokenIn file included 
>> from tempSolveSAC.c:2:
>> SolveSAC_Wrap.h:6: error: parse error before '(' token
>>
>> SolveSAC_Wrap.h:7: warning: data definition has no type or storage class
>> SolveSAC_Wrap.h:7: warning: data definition has no type or storage class
>> lipo: can't figure out the architecture type of: /var/tmp//ccQI1vZt.out
>>
>>     
[snip]
>> *The header it produces (SolveSAC_Wrap.h):
>> *
>> #ifdef __cplusplus
>> #define __PYX_EXTERN_C extern "C"
>> #else
>> #define __PYX_EXTERN_C extern
>> #endif
>> __PYX_EXTERN_C DL_IMPORT(long) (_GetNumVertices(void));
>> PyMODINIT_FUNC initSolveSAC_Wrap(void);
>>
>>     
The Pyrex generated header is using definitions found in Python.h . That 
must be included before SolveSAC_Wrap.h .

>> *The c file in which I include it (tempSolveSAC.c):
>> *
>> #include "SolveSAC_Wrap.h"
>>
>> long SolveSAC( )
>> {
>>     return _GetNumVertices();
>> }
>>
>>     

I don't know how you intend to use SolveSAC(). You can't just call a 
function that uses Python from a C program. This is embedding. The 
Python interpreter must be initialized and the relevant Python modules 
imported first. See "Extending and Embedding" in the Python Documentation.

>> *My attempt to compile tempSolveSAC.c:
>> *
>> gcc -arch ppc -arch i386 -isysroot /Developer/SDKs/MacOSX10.4u.sdk 
>> -fno-strict-aliasing -Wno-long-double -no-cpp-precomp -mno-fused-madd 
>> -fno-common -dynamic -DNDEBUG -g -O3 
>> -I/Library/Frameworks/Python.framework/Versions/2.5/include/python2.5 
>> -c tempSolveSAC.c
>> (I also just tried gcc tempSolveSAC.c, with the same results)
>>  
>> *And, again, the result:
>> * 
>> In file included from tempSolveSAC.c:1:
>> SolveSAC_Wrap.h:6: error: parse error before '(' token
>> SolveSAC_Wrap.h:7: warning: data definition has no type or storage class
>> In file included from tempSolveSAC.c:1:
>> SolveSAC_Wrap.h:6: error: parse error before '(' token
>> SolveSAC_Wrap.h:7: warning: data definition has no type or storage class
>> lipo: can't figure out the architecture type of: /var/tmp//ccmMO4oM.out
>>
>>     

Definitions are missing.


-- 
Lenard Lindstrom
<len-l at telus.net>