Disossiate the version encoded in the verifier module file names

and the version of CFFI itself

2 files changed, 8 insertions, 3 deletions

diff --git a/cffi/__init__.py b/cffi/__init__.py
index df981fd..0fe4444 100644
--- a/cffi/__init__.py
+++ b/cffi/__init__.py
@@ -6,3 +6,8 @@ from .ffiplatform import VerificationError, VerificationMissing
 
 __version__ = "0.8.6"
 __version_info__ = (0, 8, 6)
+
+# The verifier module file names are based on the CRC32 of a string that
+# contains the following version number.  It may be older than __version__
+# if nothing is clearly incompatible.
+__version_verifier_modules__ = "0.8.6"
diff --git a/cffi/verifier.py b/cffi/verifier.py
index 64fef77..688a172 100644
--- a/cffi/verifier.py
+++ b/cffi/verifier.py
@@ -1,5 +1,5 @@
 import sys, os, binascii, shutil
-from . import __version__
+from . import __version_verifier_modules__
 from . import ffiplatform
 
 if sys.version_info >= (3, 3):
@@ -32,8 +32,8 @@ class Verifier(object):
             if tag:
                 raise TypeError("can't specify both 'modulename' and 'tag'")
         else:
-            key = '\x00'.join([sys.version[:3], __version__, preamble,
-                               flattened_kwds] +
+            key = '\x00'.join([sys.version[:3], __version_verifier_modules__,
+                               preamble, flattened_kwds] +
                               ffi._cdefsources)
             if sys.version_info >= (3,):
                 key = key.encode('utf-8')