[Distutils] building on windows with mingw32

[Rene Liebscher]

Alexandre Fayolle wrote:
> 
> Hello,
> 
> I'm trying to build an extension module on windows using the
> --compiler=mingw32 option to the build command, but I get the following
> error :
> 
> running build_ext
> building 'logilab.xmldiff.maplookup' extension
> creating build\temp.win32-2.1
> creating build\temp.win32-2.1\Release
> C:\CYGWIN\BIN\gcc.exe -mno-cygwin -mdll -O -Wall -IC:\PYTHON21\Include -c
> logilab/xmldiff/extensions/maplookup.c -o
> build\temp.win32-2.1\Release\maplookup.o
> writing build\temp.win32-2.1\Release\maplookup.def
> C:\CYGWIN\BIN\gcc.exe -mno-cygwin -mdll -static -s
> build\temp.win32-2.1\Release\
> maplookup.o build\temp.win32-2.1\Release\maplookup.def -LC:\PYTHON21\libs
> -lpython21 -o build\lib.win32-2.1\logilab\xmldiff\maplookup.pyd
> build\temp.win32-2.1\Release\maplookup.o(.text+0xb2):maplookup.c: undefined
> reference to `_imp___Py_NoneStruct'
> build\temp.win32-2.1\Release\maplookup.o(.text+0xb9):maplookup.c: undefined
> reference to `_imp___Py_NoneStruct'
> build\temp.win32-2.1\Release\maplookup.o(.text+0x150):maplookup.c: undefined
> reference to `_imp___Py_NoneStruct'
> build\temp.win32-2.1\Release\maplookup.o(.text+0x157):maplookup.c: undefined
> reference to `_imp___Py_NoneStruct'
> collect2: ld returned 1 exit status
> error: command 'gcc' failed with exit status 1
> 
> I'm running python 2.1 on Win98, with gcc 2.95.3-5 and ld 2.11.90.
> 
> nm on maplookup.o told me the following
> $ nm //C/temp/DistUtils/build/temp.win32-2.1/Release/maplookup.o  | grep
> None
>          U __imp___Py_NoneStruct
> 
> (notice the double underscore at the beginning of the symbole, whereas the
> error message has only one underscore)
> 
> The only symbols I could find in python21.lib having something to do with
> None are the following :
> 
> $ nm python21.lib  | grep None  mp.win32-2.1/Release
> 00000000 T _PyErr_SetNone
> 00000000 I __imp__PyErr_SetNone
> 
> Does anyone have an idea about what's going on ?
> 
> TIA
> 
> Alexandre Fayolle

gcc needs its own libraries. See at
http://python.sourceforge.net/devel-docs/inst/non-ms-compilers.html
how to build these libraries.

kind regards
Rene Liebscher