bpo-35081: Move dtoa.h header to the internal C API (GH-18489)
Move the dtoa.h header file to the internal C API as pycore_dtoa.h:
it only contains private functions (prefixed by "_Py").
The math and cmath modules must now be compiled with the
Py_BUILD_CORE macro defined.
diff --git a/Objects/floatobject.c b/Objects/floatobject.c
index 648030b..04f968e 100644
--- a/Objects/floatobject.c
+++ b/Objects/floatobject.c
@@ -4,6 +4,7 @@
for any kind of float exception without losing portability. */
#include "Python.h"
+#include "pycore_dtoa.h"
#include <ctype.h>
#include <float.h>