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[3.6] bpo-30192: Check that Python is 64-bit before enabling BLAKE2_USE_SSE. (GH-1332) #2042

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Merged
merged 1 commit into from
Jun 16, 2017
Merged

[3.6] bpo-30192: Check that Python is 64-bit before enabling BLAKE2_USE_SSE. (GH-1332) #2042

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[3.6] Check that Python is 64-bit before enabling BLAKE2_USE_SSE. (GH… 
…-1332)

(cherry picked from commit 6c991bd)
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@nascheme
nascheme committed Jun 9, 2017
commit 4aa20d9055dc184730db7e19978224f1782d0e9b
7 changes: 5 additions & 2 deletions 7 setup.py
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Original file line number Diff line number Diff line change
Expand Up @@ -897,8 +897,11 @@ def detect_modules(self):
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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