Issue #15477: Add workaround for log1p(-0.0) on platforms where it's broken.
diff --git a/Modules/_math.h b/Modules/_math.h
index c0ceece..cf079ad 100644
--- a/Modules/_math.h
+++ b/Modules/_math.h
@@ -36,10 +36,6 @@
#define m_expm1 _Py_expm1
#endif
-#ifdef HAVE_LOG1P
-#define m_log1p log1p
-#else
-/* if the system doesn't have log1p, use the substitute
- function defined in Modules/_math.c. */
+/* Use the substitute from _math.c on all platforms:
+ it includes workarounds for buggy handling of zeros. */
#define m_log1p _Py_log1p
-#endif