From 9cead06076f890d4951b3ea2571408efe76f8b2c Mon Sep 17 00:00:00 2001
From: Neil Schemenauer <nas-github@arctrix.com>
Date: Thu, 15 Jun 2017 19:12:46 -0700
Subject: Check that Python is 64-bit before enabling BLAKE2_USE_SSE. (GH-1332)
(GH-2042)
(cherry picked from commit 6c991bdee7ec4bedd8c1b8d3812dc884b654b57c)
---
setup.py | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/setup.py b/setup.py
index f04bf22..fe47797 100644
--- a/setup.py
+++ b/setup.py
@@ -897,8 +897,11 @@ class PyBuildExt(build_ext):
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',
--
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