--- a/gcc/config/i386/cygming.h	Thu Oct 25 07:37:49 2018 +0900
+++ b/gcc/config/i386/cygming.h	Thu Feb 13 11:34:05 2020 +0900
@@ -1,6 +1,6 @@
 /* Operating system specific defines to be used when targeting GCC for
    hosting on Windows32, using a Unix style C library and tools.
-   Copyright (C) 1995-2018 Free Software Foundation, Inc.
+   Copyright (C) 1995-2020 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -268,9 +268,6 @@
    bytes in one go.  */
 #define CHECK_STACK_LIMIT 4000
 
-#undef STACK_BOUNDARY
-#define STACK_BOUNDARY	(TARGET_64BIT && ix86_abi == MS_ABI ? 128 : BITS_PER_WORD)
-
 /* By default, target has a 80387, uses IEEE compatible arithmetic,
    returns float values in the 387 and needs stack probes.
    We also align doubles to 64-bits for MSVC default compatibility.  */
@@ -388,14 +385,6 @@
 	const0_rtx));							\
     }
 
-/* Java Native Interface (JNI) methods on Win32 are invoked using the
-   stdcall calling convention.  */
-#undef MODIFY_JNI_METHOD_CALL
-#define MODIFY_JNI_METHOD_CALL(MDECL)					      \
-  build_type_attribute_variant ((MDECL),				      \
-			       build_tree_list (get_identifier ("stdcall"),   \
-						NULL))
-
 /* For Win32 ABI compatibility */
 #undef DEFAULT_PCC_STRUCT_RETURN
 #define DEFAULT_PCC_STRUCT_RETURN 0
@@ -423,11 +412,6 @@
 #define BIGGEST_FIELD_ALIGNMENT 64
 #endif
 
-/* A bit-field declared as `int' forces `int' alignment for the struct.  */
-#undef PCC_BITFIELD_TYPE_MATTERS
-#define PCC_BITFIELD_TYPE_MATTERS 1
-#define GROUP_BITFIELDS_BY_ALIGN TYPE_NATIVE(rec)
-
 /* Enable alias attribute support.  */
 #ifndef SET_ASM_OP
 #define SET_ASM_OP "\t.set\t"