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[3.13] gh-131032: Add support.linked_to_musl() function (#131071) (#131179)

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gh-131032: Add support.linked_to_musl() function (#131071)

Skip test_math.test_fma_zero_result() if Python is linked to the musl
C library.

(cherry picked from commit 68922ace4d)
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Victor Stinner 2025-03-13 10:59:57 +01:00 • committed by GitHub
parent 589382bd04
commit 050813c026
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3 changed files with 26 additions and 2 deletions
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Lib/test/test_math.py
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@ -2712,8 +2712,9 @@ def test_fma_infinities(self):
# gh-73468: On some platforms, libc fma() doesn't implement IEE 754-2008
# properly: it doesn't use the right sign when the result is zero.
@unittest.skipIf(
sys.platform.startswith(("freebsd", "wasi", "netbsd"))
or (sys.platform == "android" and platform.machine() == "x86_64"),
sys.platform.startswith(("freebsd", "wasi", "netbsd", "emscripten"))
or (sys.platform == "android" and platform.machine() == "x86_64")
or support.linked_to_musl(), # gh-131032
f"this platform doesn't implement IEE 754-2008 properly")
def test_fma_zero_result(self):
nonnegative_finites = [0.0, 1e-300, 2.3, 1e300]