issue27186:  add C version of os.fspath(); patch by Jelle Zijlstra
diff --git a/Include/Python.h b/Include/Python.h
index 858dbd1..4c7c9a4 100644
--- a/Include/Python.h
+++ b/Include/Python.h
@@ -116,6 +116,7 @@
 #include "pylifecycle.h"
 #include "ceval.h"
 #include "sysmodule.h"
+#include "osmodule.h"
 #include "intrcheck.h"
 #include "import.h"
 
diff --git a/Include/osmodule.h b/Include/osmodule.h
new file mode 100644
index 0000000..7146757
--- /dev/null
+++ b/Include/osmodule.h
@@ -0,0 +1,15 @@
+
+/* os module interface */
+
+#ifndef Py_OSMODULE_H
+#define Py_OSMODULE_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+PyAPI_FUNC(PyObject *) PyOS_FSPath(PyObject *path);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* !Py_OSMODULE_H */