commit 6c991bdee7ec4bedd8c1b8d3812dc884b654b57c
author Neil Schemenauer <nas-github@arctrix.com> Fri Apr 28 09:56:48 2017 -0700
committer GitHub <noreply@github.com> Fri Apr 28 09:56:48 2017 -0700
tree 0401cf8f86a82ee03d41f811942af51117cd9886
parent d1a1def7bf221b04dcf3fc3a67aa19aa2f622f83

Check that Python is 64-bit before enabling BLAKE2_USE_SSE. (#1332)

setup.py

diff --git a/setup.py b/setup.py
index 3b3d097..6a05643 100644
--- a/setup.py
+++ b/setup.py
@@ -898,8 +898,11 @@
         blake2_deps.append('hashlib.h')
 
         blake2_macros = []
-        if not cross_compiling and os.uname().machine == "x86_64":
-            # Every x86_64 machine has at least SSE2.
+        if (not cross_compiling and
+                os.uname().machine == "x86_64" and
+                sys.maxsize >  2**32):
+            # Every x86_64 machine has at least SSE2.  Check for sys.maxsize
+            # in case that kernel is 64-bit but userspace is 32-bit.
             blake2_macros.append(('BLAKE2_USE_SSE', '1'))
 
         exts.append( Extension('_blake2',