[Numpy-discussion] Problems building numpy

Matthieu Brucher matthieu.brucher@gmail....
Fri Jul 13 09:52:35 CDT 2007


What version of MSVC are you using ?

If you really want to have an optimized version, don't use mingw (gcc is not
up to date).


2007/7/13, numpy-discussion@robince.ftml.net <
> Hi,
> I am keen to evaluate numpy as an alternative to MATLAB for my PhD work
> and possible wider use within the department. To make a fairer
> comparison I wanted to build it with optimised ATLAS/LAPACK etc. hence
> building from source.
> I am running into some problems though.
> I am using Windows XP SP2, with latest Cygwin and I'm trying to follow
> the instructions on the wiki.
> Firstly, is what I'm trying possible? On the Installing Scipy/Windows
> page it says MinGW gcc and g77 are best supported, but also says to
> build against binary Python download you need to use MSVC. From
> http://boodebr.org/main/python/build-windows-extensions it seems
> building extensions with gcc is fine (and I built PyCrypto successfully
> as a test). So can I do what I am trying to do (build numpy/scipy on
> windows using cygwin without MSVC installed) against the downloaded
> Python distribution? If not, I can't find any resources about building
> Python from source on Windows using Cygwin, so it seems like I would be
> completely stuck.
> The next problem is that although I filled in the site.cfg file as
> documented (below), the setup.py script doesn't seem to pick it up and
> doesn't look in any of the specified directories. I can get around this
> by putting ATLAS/LAPACK libs in C:\, but obviously this isn't very
> satisfactory. Also is the entry for fftw correct? I couldn't find any
> information about this on the wiki.
> ------
> [blas_opt]
> libraries = f77blas, cblas, atlas
> library_dirs = C:\cygwin\home\mqbxfri2\ATLAS\atlas_win32\lib
> include_dirs = C:\cygwin\home\mqbxfri2\ATLAS\atlas_win32\include
> #
> [lapack_opt]
> libraries = lapack, f77blas, cblas, atlas
> library_dirs = C:\cygwin\home\mqbxfri2\ATLAS\atlas_win32\lib
> include_dirs = C:\cygwin\home\mqbxfri2\ATLAS\atlas_win32\include
> [fftw]
> libraries = fftw3-3
> library_dirs = "C:\fftw"
> -----
> Following this there seem to be some more problems with the setup.
> "python setup.py build --compiler=mingw32" fails with:
>   File
>   "C:\cygwin\home\mqbxfri2\numpy_trunk\numpy\distutils\fcompiler\__init__.py",
>   line 731, in _find_existing_fcompiler
>     c.customize(dist)
>   AttributeError: 'NoneType' object has no attribute 'customize'
> c is the result of the new_fcompiler function.
> "python setup.py config_fc --help-fcompiler" failes with:
>   File "c:\Python25\lib\distutils\msvccompiler.py", line 270, in
>   initialize
>     "version of the compiler, but it isn't installed." % self.__product)
>   distutils.errors.DistutilsPlatformError: Python was built with Visual
>   Studio version 7.1, and extensions need to be built with the same
>   version of the compiler, but it isn't installed.
> Although as I mentioned I can successfully build extensions with gcc.
> Reading through the help I saw that there is a "none" fcompiler type, so
> using that I get a bit further:
> "python setup.py build --compiler=mingw32 --fcompiler=none" run
> initially with build directory removed gives the same NoneType error,
> but then running it again the build appears to start. I then run into
> bug #220 http://projects.scipy.org/scipy/numpy/ticket/220:
> numpy\core\src\multiarraymodule.c: In function `initmultiarray':
> numpy\core\src\multiarraymodule.c:7563: error: `NPY_ALLOW_THREADS'
> undeclared (first use in this function)
> numpy\core\src\multiarraymodule.c:7563: error: (Each undeclared
> identifier is reported only once
> numpy\core\src\multiarraymodule.c:7563: error: for each function it
> appears in.)
> I would really appreciate any help to get this working. I understand
> building numpy doesn't require a fortran compiler, but scipy does. I am
> hoping to build scipy as well, so presumably the config system needs to
> recognise the cygwin g77 compiler for that to work? During the config I
> also see the following message:
> don't know how to compile Fortran code on platform 'nt' with 'gnu'
> compiler. Supported compilers are: absoft
> Does this mean it isn't possible to build scipy on Windows with Cygwin
> compilers?
> If I am eventually successful I would be happy to update the wiki with
> some more detailed instructions based on my experiences.
> Finally, I can't find any discussion of the relevant merits of ATLAS vs
> MKL, other than the different licensing. Is it expected that MKL
> performs better? Which is recommended?
> Thanks very much,
> Robin
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