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-rw-r--r--Python/ceval.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/Python/ceval.c b/Python/ceval.c
index 28e923219d..342dc10af6 100644
--- a/Python/ceval.c
+++ b/Python/ceval.c
@@ -30,6 +30,10 @@
#define CHECKEXC 1 /* Double-check exception checking */
#endif
+#if !defined(Py_BUILD_CORE)
+# error "ceval.c must be build with Py_BUILD_CORE define for best performance"
+#endif
+
/* Private API for the LOAD_METHOD opcode. */
extern int _PyObject_GetMethod(PyObject *, PyObject *, PyObject **);