diff options
Diffstat (limited to 'src/zope/security/tests/test_compile_flags.py')
| -rw-r--r-- | src/zope/security/tests/test_compile_flags.py | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/zope/security/tests/test_compile_flags.py b/src/zope/security/tests/test_compile_flags.py new file mode 100644 index 0000000..18b72c8 --- /dev/null +++ b/src/zope/security/tests/test_compile_flags.py @@ -0,0 +1,30 @@ +############################################################################## +# +# Copyright (c) 2022 Zope Foundation and Contributors. +# All Rights Reserved. +# +# This software is subject to the provisions of the Zope Public License, +# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution. +# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED +# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS +# FOR A PARTICULAR PURPOSE +# +############################################################################## +import struct +import unittest + +import zope.security.checker # noqa: try to load a C module for side effects +import zope.security.proxy # noqa: try to load a C module for side effects + + +class TestFloatingPoint(unittest.TestCase): + + def test_no_fast_math_optimization(self): + # Building with -Ofast enables -ffast-math, which sets certain FPU + # flags that can cause breakage elsewhere. A library such as BTrees + # has no business changing global FPU flags for the entire process. + zero_bits = struct.unpack("!Q", struct.pack("!d", 0.0))[0] + next_up = zero_bits + 1 + smallest_subnormal = struct.unpack("!d", struct.pack("!Q", next_up))[0] + self.assertNotEqual(smallest_subnormal, 0.0) |