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Date:	Thu, 31 Oct 2013 14:11:58 -0400
From:	Jason Tishler <jason AT tishler DOT net>
To:	cygwin AT cygwin DOT com
Subject:	Re: Unable to compile python 3.3 [Was: Re: Python 3.3 coming soon?]
Message-ID:	<20131031181156.GA66600@tishler.net>
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On Tue, Oct 15, 2013 at 12:28:31PM +0900, nu774 wrote:
> Installing libffi-devel will let python pick system libffi, so you
> can skip that libffi building part you are currently stuck.
> 
> (2013/10/15 10:10), Ryan Johnson wrote:
> >"/usr/src/python3-3.3.2-3/src/Python-3.3.2/Lib/distutils/command/build_ext.py",
> >line 463, in build_extensions
> >     self.build_extension(ext)
> >   File "/usr/src/python3-3.3.2-3/src/Python-3.3.2/setup.py", line 279,
> >in build_extension
> >     if not self.configure_ctypes(ext):
> >   File "/usr/src/python3-3.3.2-3/src/Python-3.3.2/setup.py", line 1807,
> >in configure_ctypes
> >     exec(f.read(), globals(), fficonfig)
> >   File "<string>", line 33, in <module>
> >KeyError: 'X86_WIN64'
> >Makefile:505: recipe for target 'sharedmods' failed
> >
> >At this point I'm stuck... any advice from the gurus out there would be
> >appreciated.

I get the same build failure with Python 2.7.5 and 3.2.5 under 64-bit
Cygwin even though I configure --with-system-ffi and have libffi-devel
installed.  I noticed that libffi-devel installs its headers in a
non-standard location:

$ cygcheck -l libffi-devel | fgrep .h
/usr/lib/libffi-3.0.13/include/ffi.h
/usr/lib/libffi-3.0.13/include/ffitarget.h

AFAICT, this prevents Python's build system from using the system
provided libffi and attempt to build its own causing an error like the
one above.

I can workaround the problem by creating symlinks to the libffi header
files in /usr/include:

$ ln -s /usr/lib/libffi-3.0.13/include/* /usr/include

It appears that others have successfully built Python under 64-bit
Cygwin without resorting to my workaround.  Does anyone know what I'm
missing?

Thanks,
Jason

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