diff -rupN python3.7m/bytesobject.h python3.7m_patched/bytesobject.h
--- python3.7m/bytesobject.h	2019-06-30 07:43:17.201934475 +0200
+++ python3.7m_patched/bytesobject.h	2019-06-29 20:16:35.360347551 +0200
@@ -52,9 +52,9 @@ PyAPI_FUNC(PyObject *) PyBytes_FromStrin
 PyAPI_FUNC(PyObject *) PyBytes_FromString(const char *);
 PyAPI_FUNC(PyObject *) PyBytes_FromObject(PyObject *);
 PyAPI_FUNC(PyObject *) PyBytes_FromFormatV(const char*, va_list)
-                                Py_GCC_ATTRIBUTE((format(printf, 1, 0)));
+                                Py_GCC_ATTRIBUTE((format(__printf__, 1, 0)));
 PyAPI_FUNC(PyObject *) PyBytes_FromFormat(const char*, ...)
-                                Py_GCC_ATTRIBUTE((format(printf, 1, 2)));
+                                Py_GCC_ATTRIBUTE((format(__printf__, 1, 2)));
 PyAPI_FUNC(Py_ssize_t) PyBytes_Size(PyObject *);
 PyAPI_FUNC(char *) PyBytes_AsString(PyObject *);
 PyAPI_FUNC(PyObject *) PyBytes_Repr(PyObject *, int);
diff -rupN python3.7m/pyerrors.h python3.7m_patched/pyerrors.h
--- python3.7m/pyerrors.h	2019-06-30 07:43:17.201934475 +0200
+++ python3.7m_patched/pyerrors.h	2019-06-29 20:16:35.360347551 +0200
@@ -494,9 +494,9 @@ PyAPI_FUNC(int) PyUnicodeTranslateError_
 
 #include <stdarg.h>
 PyAPI_FUNC(int) PyOS_snprintf(char *str, size_t size, const char  *format, ...)
-                        Py_GCC_ATTRIBUTE((format(printf, 3, 4)));
+                        Py_GCC_ATTRIBUTE((format(__printf__, 3, 4)));
 PyAPI_FUNC(int) PyOS_vsnprintf(char *str, size_t size, const char  *format, va_list va)
-                        Py_GCC_ATTRIBUTE((format(printf, 3, 0)));
+                        Py_GCC_ATTRIBUTE((format(__printf__, 3, 0)));
 
 #ifdef __cplusplus
 }
diff -rupN python3.7m/sysmodule.h python3.7m_patched/sysmodule.h
--- python3.7m/sysmodule.h	2019-06-30 07:43:17.205934339 +0200
+++ python3.7m_patched/sysmodule.h	2019-06-29 20:16:35.360347551 +0200
@@ -19,9 +19,9 @@ PyAPI_FUNC(void) PySys_SetArgvEx(int, wc
 PyAPI_FUNC(void) PySys_SetPath(const wchar_t *);
 
 PyAPI_FUNC(void) PySys_WriteStdout(const char *format, ...)
-                 Py_GCC_ATTRIBUTE((format(printf, 1, 2)));
+                 Py_GCC_ATTRIBUTE((format(__printf__, 1, 2)));
 PyAPI_FUNC(void) PySys_WriteStderr(const char *format, ...)
-                 Py_GCC_ATTRIBUTE((format(printf, 1, 2)));
+                 Py_GCC_ATTRIBUTE((format(__printf__, 1, 2)));
 PyAPI_FUNC(void) PySys_FormatStdout(const char *format, ...);
 PyAPI_FUNC(void) PySys_FormatStderr(const char *format, ...);