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-rw-r--r--Modules/_math.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/Modules/_math.h b/Modules/_math.h
new file mode 100644
index 0000000..69c96b5
--- /dev/null
+++ b/Modules/_math.h
@@ -0,0 +1,9 @@
+double _Py_expm1(double x);
+
+#ifdef HAVE_EXPM1
+#define m_expm1 expm1
+#else
+/* if the system doesn't have expm1, use the substitute
+ function defined in Modules/_math.c. */
+#define m_expm1 _Py_expm1
+#endif