Author: Armin Rigo <[email protected]>
Branch:
Changeset: r3219:739f2c59674d
Date: 2019-02-16 13:13 +0100
http://bitbucket.org/cffi/cffi/changeset/739f2c59674d/
Log: On Windows, we still can't use Py_LIMITED_API for bad reasons.
diff --git a/cffi/_cffi_include.h b/cffi/_cffi_include.h
--- a/cffi/_cffi_include.h
+++ b/cffi/_cffi_include.h
@@ -8,43 +8,20 @@
the same works for the other two macros. Py_DEBUG implies them,
but not the other way around.
- The implementation is messy (issue #350): on Windows, with _MSC_VER,
- we have to define Py_LIMITED_API even before including pyconfig.h.
- In that case, we guess what pyconfig.h will do to the macros above,
- and check our guess after the #include.
-
- Note that on Windows, with CPython 3.x, you need virtualenv version
- >= 16.0.0. Older versions don't copy PYTHON3.DLL. As a workaround
- you can remove the definition of Py_LIMITED_API here.
-
- See also 'py_limited_api' in cffi/setuptools_ext.py.
+ Issue #350 is still open: on Windows, the code here causes it to link
+ with PYTHON36.DLL (for example) instead of PYTHON3.DLL. A fix was
+ attempted in 164e526a5515 and 14ce6985e1c3, but reverted: virtualenv
+ does not make PYTHON3.DLL available, and so the "correctly" compiled
+ version would not run inside a virtualenv. We will re-apply the fix
+ after virtualenv has been fixed for some time. For explanation, see
+ issue #355. For a workaround if you want PYTHON3.DLL and don't worry
+ about virtualenv, see issue #350. See also 'py_limited_api' in
+ setuptools_ext.py.
*/
#if !defined(_CFFI_USE_EMBEDDING) && !defined(Py_LIMITED_API)
-# ifdef _MSC_VER
-# if !defined(_DEBUG) && !defined(Py_DEBUG) && !defined(Py_TRACE_REFS) &&
!defined(Py_REF_DEBUG)
-# define Py_LIMITED_API
-# endif
-# include <pyconfig.h>
- /* sanity-check: Py_LIMITED_API will cause crashes if any of these
- are also defined. Normally, the Python file PC/pyconfig.h does not
- cause any of these to be defined, with the exception that _DEBUG
- causes Py_DEBUG. Double-check that. */
-# ifdef Py_LIMITED_API
-# if defined(Py_DEBUG)
-# error "pyconfig.h unexpectedly defines Py_DEBUG, but Py_LIMITED_API
is set"
-# endif
-# if defined(Py_TRACE_REFS)
-# error "pyconfig.h unexpectedly defines Py_TRACE_REFS, but
Py_LIMITED_API is set"
-# endif
-# if defined(Py_REF_DEBUG)
-# error "pyconfig.h unexpectedly defines Py_REF_DEBUG, but
Py_LIMITED_API is set"
-# endif
-# endif
-# else
-# include <pyconfig.h>
-# if !defined(Py_DEBUG) && !defined(Py_TRACE_REFS) && !defined(Py_REF_DEBUG)
-# define Py_LIMITED_API
-# endif
+# include <pyconfig.h>
+# if !defined(Py_DEBUG) && !defined(Py_TRACE_REFS) && !defined(Py_REF_DEBUG)
+# define Py_LIMITED_API
# endif
#endif
diff --git a/cffi/setuptools_ext.py b/cffi/setuptools_ext.py
--- a/cffi/setuptools_ext.py
+++ b/cffi/setuptools_ext.py
@@ -81,8 +81,14 @@
it doesn't so far, creating troubles. That's why we check
for "not hasattr(sys, 'gettotalrefcount')" (the 2.7 compatible equivalent
of 'd' not in sys.abiflags). (http://bugs.python.org/issue28401)
+
+ On Windows, with CPython <= 3.4, it's better not to use py_limited_api
+ because virtualenv *still* doesn't copy PYTHON3.DLL on these versions.
+ For now we'll skip py_limited_api on all Windows versions to avoid an
+ inconsistent mess.
"""
- if 'py_limited_api' not in kwds and not hasattr(sys, 'gettotalrefcount'):
+ if ('py_limited_api' not in kwds and not hasattr(sys, 'gettotalrefcount')
+ and sys.platform != 'win32'):
import setuptools
try:
setuptools_major_version =
int(setuptools.__version__.partition('.')[0])
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