On Sun, Oct 30, 2011 at 7:18 AM, David Cournapeau
On Thu, Oct 27, 2011 at 5:19 PM, Ralf Gommers
wrote: Hi David,
On Thu, Oct 27, 2011 at 3:02 PM, David Cournapeau
wrote: Hi,
I was wondering if we could finally move to a more recent version of compilers for official win32 installers. This would of course concern the next release cycle, not the ones where beta/rc are already in progress.
Basically, the pros: - we will have to move at some point - gcc 4.* seem less buggy, especially C++ and fortran. - no need to maintain msvcr90 vodoo The cons: - it will most likely break the ABI - we need to recompile atlas (but I can take care of it) - the biggest: it is difficult to combine gfortran with visual studio (more exactly you cannot link gfortran runtime to a visual studio executable). The only solution I could think of would be to recompile the gfortran runtime with Visual Studio, which for some reason does not sound very appealing :)
To get the datetime changes to work with MinGW, we already concluded that building with 4.x is more or less required (without recognizing some of the points you list above). Changes to mingw32ccompiler to fix compilation with 4.x went in in https://github.com/numpy/numpy/pull/156. It would be good if you could check those.
I will look into it more carefully, but overall, it seems that building atlas 3.8.4, numpy and scipy with gcc 4.x works quite well. The main issue is that gcc 4.* adds some dependencies on mingw dlls. There are two options: - adding the dlls in the installers - statically linking those, which seems to be a bad idea (generalizing the dll boundaries problem to exception and things we would rather not care about: http://cygwin.com/ml/cygwin/2007-06/msg00332.html).
It probably makes sense make this move for numpy 1.7. If this breaks the ABI then it would be easiest to make numpy 1.7 the minimum required version for scipy 0.11.
My thinking as well.
It looks like it's really time to upgrade. pythonxy comes with gfortran and a new MingW, and I cannot build scipy anymore. I don't find an installer for the old MingW 3.5 anymore for my new computer. (I haven't seen any problems mixing gcc 4.4 with C/C++ code like scikits.learn against the official numpy/scipy installer versions.) I can volunteer for testing, since it looks like I'm set up for gfortran. Josef
cheers,
David _______________________________________________ NumPy-Discussion mailing list NumPy-Discussion@scipy.org http://mail.scipy.org/mailman/listinfo/numpy-discussion