add

ccxt/static_dependencies/msgpack/buff_converter.h

@@ -0,0 +1,8 @@
+#include "Python.h"
+
+/* cython does not support this preprocessor check => write it in raw C */
+static PyObject *
+buff_to_buff(char *buff, Py_ssize_t size)
+{
+    return PyMemoryView_FromMemory(buff, size, PyBUF_READ);
+}