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diff --git a/gcc/config/i386/cygming.h b/gcc/config/i386/cygming.h
new file mode 100644
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--- /dev/null
+++ b/gcc/config/i386/cygming.h
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+/* 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, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
+ 2004, 2005, 2007, 2008, 2009
+ Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3. If not see
+. */
+
+#define DBX_DEBUGGING_INFO 1
+#define SDB_DEBUGGING_INFO 1
+#if TARGET_64BIT_DEFAULT || defined (HAVE_GAS_PE_SECREL32_RELOC)
+#define DWARF2_DEBUGGING_INFO 1
+#endif
+
+#undef PREFERRED_DEBUGGING_TYPE
+#if (DWARF2_DEBUGGING_INFO)
+#define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
+#else
+#define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
+#endif
+
+#undef TARGET_64BIT_MS_ABI
+#define TARGET_64BIT_MS_ABI (!cfun ? DEFAULT_ABI == MS_ABI : TARGET_64BIT && cfun->machine->call_abi == MS_ABI)
+
+#undef DEFAULT_ABI
+#define DEFAULT_ABI (TARGET_64BIT ? MS_ABI : SYSV_ABI)
+
+#undef DBX_REGISTER_NUMBER
+#define DBX_REGISTER_NUMBER(n) \
+ (TARGET_64BIT ? dbx64_register_map[n] \
+ : (write_symbols == DWARF2_DEBUG \
+ ? svr4_dbx_register_map[n] : dbx_register_map[n]))
+
+/* Map gcc register number to DWARF 2 CFA column number. For 32 bit
+ target, always use the svr4_dbx_register_map for DWARF .eh_frame
+ even if we don't use DWARF .debug_frame. */
+#undef DWARF_FRAME_REGNUM
+#define DWARF_FRAME_REGNUM(n) \
+ (TARGET_64BIT ? dbx64_register_map[(n)] \
+ : svr4_dbx_register_map[(n)])
+
+#ifdef HAVE_GAS_PE_SECREL32_RELOC
+/* Use section relative relocations for debugging offsets. Unlike
+ other targets that fake this by putting the section VMA at 0, PE
+ won't allow it. */
+#define ASM_OUTPUT_DWARF_OFFSET(FILE, SIZE, LABEL, SECTION) \
+ do { \
+ if (SIZE != 4 && (!TARGET_64BIT || SIZE != 8)) \
+ abort (); \
+ \
+ fputs ("\t.secrel32\t", FILE); \
+ assemble_name (FILE, LABEL); \
+ } while (0)
+#endif
+
+#define TARGET_EXECUTABLE_SUFFIX ".exe"
+
+#include
+
+#define TARGET_OS_CPP_BUILTINS() \
+ do \
+ { \
+ if (!TARGET_64BIT) \
+ builtin_define ("_X86_=1"); \
+ builtin_assert ("system=winnt"); \
+ builtin_define ("__stdcall=__attribute__((__stdcall__))"); \
+ builtin_define ("__fastcall=__attribute__((__fastcall__))"); \
+ builtin_define ("__cdecl=__attribute__((__cdecl__))"); \
+ if (!flag_iso) \
+ { \
+ builtin_define ("_stdcall=__attribute__((__stdcall__))"); \
+ builtin_define ("_fastcall=__attribute__((__fastcall__))"); \
+ builtin_define ("_cdecl=__attribute__((__cdecl__))"); \
+ } \
+ /* Even though linkonce works with static libs, this is needed \
+ to compare typeinfo symbols across dll boundaries. */ \
+ builtin_define ("__GXX_MERGED_TYPEINFO_NAMES=0"); \
+ builtin_define ("__GXX_TYPEINFO_EQUALITY_INLINE=0"); \
+ EXTRA_OS_CPP_BUILTINS (); \
+ } \
+ while (0)
+
+/* Get tree.c to declare a target-specific specialization of
+ merge_decl_attributes. */
+#define TARGET_DLLIMPORT_DECL_ATTRIBUTES 1
+
+/* This macro defines names of additional specifications to put in the specs
+ that can be used in various specifications like CC1_SPEC. Its definition
+ is an initializer with a subgrouping for each command option.
+
+ Each subgrouping contains a string constant, that defines the
+ specification name, and a string constant that used by the GCC driver
+ program.
+
+ Do not define this macro if it does not need to do anything. */
+
+#undef SUBTARGET_EXTRA_SPECS
+#define SUBTARGET_EXTRA_SPECS \
+ { "mingw_include_path", DEFAULT_TARGET_MACHINE }
+
+#undef MATH_LIBRARY
+#define MATH_LIBRARY ""
+
+#define SIZE_TYPE (TARGET_64BIT ? "long long unsigned int" : "unsigned int")
+#define PTRDIFF_TYPE (TARGET_64BIT ? "long long int" : "int")
+
+#define WCHAR_TYPE_SIZE 16
+#define WCHAR_TYPE "short unsigned int"
+
+/* Windows64 continues to use a 32-bit long type. */
+#undef LONG_TYPE_SIZE
+#define LONG_TYPE_SIZE 32
+
+/* Enable parsing of #pragma pack(push,) and #pragma pack(pop). */
+#define HANDLE_PRAGMA_PACK_PUSH_POP 1
+
+union tree_node;
+#define TREE union tree_node *
+
+#define drectve_section() \
+ (fprintf (asm_out_file, "\t.section .drectve\n"), \
+ in_section = NULL)
+
+/* Older versions of gas don't handle 'r' as data.
+ Explicitly set data flag with 'd'. */
+#define READONLY_DATA_SECTION_ASM_OP "\t.section .rdata,\"dr\""
+
+/* Don't allow flag_pic to propagate since gas may produce invalid code
+ otherwise. */
+
+#undef SUBTARGET_OVERRIDE_OPTIONS
+#define SUBTARGET_OVERRIDE_OPTIONS \
+do { \
+ if (flag_pic) \
+ { \
+ warning (0, "-f%s ignored for target (all code is position independent)",\
+ (flag_pic > 1) ? "PIC" : "pic"); \
+ flag_pic = 0; \
+ } \
+} while (0) \
+
+/* Define this macro if references to a symbol must be treated
+ differently depending on something about the variable or
+ function named by the symbol (such as what section it is in).
+
+ On i386 running Windows NT, modify the assembler name with a suffix
+ consisting of an atsign (@) followed by string of digits that represents
+ the number of bytes of arguments passed to the function, if it has the
+ attribute STDCALL.
+
+ In addition, we must mark dll symbols specially. Definitions of
+ dllexport'd objects install some info in the .drectve section.
+ References to dllimport'd objects are fetched indirectly via
+ _imp__. If both are declared, dllexport overrides. This is also
+ needed to implement one-only vtables: they go into their own
+ section and we need to set DECL_SECTION_NAME so we do that here.
+ Note that we can be called twice on the same decl. */
+
+#define SUBTARGET_ENCODE_SECTION_INFO i386_pe_encode_section_info
+
+/* Output a common block. */
+#undef ASM_OUTPUT_ALIGNED_DECL_COMMON
+#define ASM_OUTPUT_ALIGNED_DECL_COMMON \
+ i386_pe_asm_output_aligned_decl_common
+
+/* Output the label for an initialized variable. */
+#undef ASM_DECLARE_OBJECT_NAME
+#define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) \
+do { \
+ i386_pe_maybe_record_exported_symbol (DECL, NAME, 1); \
+ ASM_OUTPUT_LABEL ((STREAM), (NAME)); \
+} while (0)
+
+/* Output a reference to a label. Fastcall function symbols
+ keep their '@' prefix, while other symbols are prefixed
+ with user_label_prefix. */
+#undef ASM_OUTPUT_LABELREF
+#define ASM_OUTPUT_LABELREF(STREAM, NAME) \
+do { \
+ if ((NAME)[0] != FASTCALL_PREFIX) \
+ fputs (user_label_prefix, (STREAM)); \
+ fputs ((NAME), (STREAM)); \
+} while (0)
+
+
+/* Emit code to check the stack when allocating more than 4000
+ bytes in one go. */
+#define CHECK_STACK_LIMIT 4000
+
+#undef STACK_BOUNDARY
+#define STACK_BOUNDARY (DEFAULT_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. */
+
+#undef TARGET_SUBTARGET_DEFAULT
+#define TARGET_SUBTARGET_DEFAULT \
+ (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS \
+ | MASK_STACK_PROBE | MASK_ALIGN_DOUBLE)
+
+#undef TARGET_SUBTARGET64_DEFAULT
+#define TARGET_SUBTARGET64_DEFAULT \
+ MASK_128BIT_LONG_DOUBLE
+
+/* This is how to output an assembler line
+ that says to advance the location counter
+ to a multiple of 2**LOG bytes. */
+
+#undef ASM_OUTPUT_ALIGN
+#define ASM_OUTPUT_ALIGN(FILE,LOG) \
+ if ((LOG)!=0) fprintf ((FILE), "\t.align %d\n", 1<<(LOG))
+
+/* Windows uses explicit import from shared libraries. */
+#define MULTIPLE_SYMBOL_SPACES 1
+
+#define TARGET_ASM_UNIQUE_SECTION i386_pe_unique_section
+#define TARGET_ASM_FUNCTION_RODATA_SECTION default_no_function_rodata_section
+
+#define SUPPORTS_ONE_ONLY 1
+
+/* Switch into a generic section. */
+#define TARGET_ASM_NAMED_SECTION i386_pe_asm_named_section
+
+/* Select attributes for named sections. */
+#define TARGET_SECTION_TYPE_FLAGS i386_pe_section_type_flags
+
+/* Write the extra assembler code needed to declare a function
+ properly. If we are generating SDB debugging information, this
+ will happen automatically, so we only need to handle other cases. */
+#undef ASM_DECLARE_FUNCTION_NAME
+#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
+ do \
+ { \
+ i386_pe_maybe_record_exported_symbol (DECL, NAME, 0); \
+ if (write_symbols != SDB_DEBUG) \
+ i386_pe_declare_function_type (FILE, NAME, TREE_PUBLIC (DECL)); \
+ ASM_OUTPUT_LABEL (FILE, NAME); \
+ } \
+ while (0)
+
+/* Add an external function to the list of functions to be declared at
+ the end of the file. */
+#define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
+ do \
+ { \
+ if (TREE_CODE (DECL) == FUNCTION_DECL) \
+ i386_pe_record_external_function ((DECL), (NAME)); \
+ } \
+ while (0)
+
+/* Declare the type properly for any external libcall. */
+#define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, FUN) \
+ i386_pe_declare_function_type (FILE, XSTR (FUN, 0), 1)
+
+/* This says out to put a global symbol in the BSS section. */
+#undef ASM_OUTPUT_ALIGNED_BSS
+#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
+ asm_output_aligned_bss ((FILE), (DECL), (NAME), (SIZE), (ALIGN))
+
+/* Output function declarations at the end of the file. */
+#undef TARGET_ASM_FILE_END
+#define TARGET_ASM_FILE_END i386_pe_file_end
+
+#undef ASM_COMMENT_START
+#define ASM_COMMENT_START " #"
+
+#ifndef DWARF2_UNWIND_INFO
+/* If configured with --disable-sjlj-exceptions, use DWARF2, else
+ default to SJLJ. */
+#if (defined (CONFIG_SJLJ_EXCEPTIONS) && !CONFIG_SJLJ_EXCEPTIONS)
+/* The logic of this #if must be kept synchronised with the logic
+ for selecting the tmake_eh_file fragment in config.gcc. */
+#define DWARF2_UNWIND_INFO 1
+#else
+#define DWARF2_UNWIND_INFO 0
+#endif
+#endif
+
+/* Don't assume anything about the header files. */
+#define NO_IMPLICIT_EXTERN_C
+
+#undef PROFILE_HOOK
+#define PROFILE_HOOK(LABEL) \
+ if (MAIN_NAME_P (DECL_NAME (current_function_decl))) \
+ { \
+ emit_call_insn (gen_rtx_CALL (VOIDmode, \
+ gen_rtx_MEM (FUNCTION_MODE, \
+ gen_rtx_SYMBOL_REF (Pmode, "_monstartup")), \
+ 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
+
+/* MSVC returns aggregate types of up to 8 bytes via registers.
+ See i386.c:ix86_return_in_memory. */
+#undef MS_AGGREGATE_RETURN
+#define MS_AGGREGATE_RETURN 1
+
+/* Biggest alignment supported by the object file format of this
+ machine. Use this macro to limit the alignment which can be
+ specified using the `__attribute__ ((aligned (N)))' construct. If
+ not defined, the default value is `BIGGEST_ALIGNMENT'. */
+/* IMAGE_SCN_ALIGN_8192BYTES is the largest section alignment flag
+ specified in the PECOFF60 spec. Native MS compiler also limits
+ user-specified alignment to 8192 bytes. */
+#undef MAX_OFILE_ALIGNMENT
+#define MAX_OFILE_ALIGNMENT (8192 * 8)
+
+/* BIGGEST_FIELD_ALIGNMENT macro is used directly by libobjc, There, we
+ align internal doubles in structures on dword boundaries. Otherwise,
+ support vector modes using ADJUST_FIELD_ALIGN, defined in i386.h. */
+#ifdef IN_TARGET_LIBS
+#undef BIGGEST_FIELD_ALIGNMENT
+#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"
+#endif
+
+/* This implements the `alias' attribute, keeping any stdcall or
+ fastcall decoration. */
+#undef ASM_OUTPUT_DEF_FROM_DECLS
+#define ASM_OUTPUT_DEF_FROM_DECLS(STREAM, DECL, TARGET) \
+ do \
+ { \
+ const char *alias \
+ = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL)); \
+ if (TREE_CODE (DECL) == FUNCTION_DECL) \
+ i386_pe_declare_function_type (STREAM, alias, \
+ TREE_PUBLIC (DECL)); \
+ ASM_OUTPUT_DEF (STREAM, alias, IDENTIFIER_POINTER (TARGET)); \
+ } while (0)
+
+/* GNU as supports weak symbols on PECOFF. */
+#ifdef HAVE_GAS_WEAK
+#define ASM_WEAKEN_LABEL(FILE, NAME) \
+ do \
+ { \
+ fputs ("\t.weak\t", (FILE)); \
+ assemble_name ((FILE), (NAME)); \
+ fputc ('\n', (FILE)); \
+ } \
+ while (0)
+#endif /* HAVE_GAS_WEAK */
+
+/* FIXME: SUPPORTS_WEAK && TARGET_HAVE_NAMED_SECTIONS is true,
+ but for .jcr section to work we also need crtbegin and crtend
+ objects. */
+#define TARGET_USE_JCR_SECTION 0
+
+/* Decide whether it is safe to use a local alias for a virtual function
+ when constructing thunks. */
+#undef TARGET_USE_LOCAL_THUNK_ALIAS_P
+#define TARGET_USE_LOCAL_THUNK_ALIAS_P(DECL) (!DECL_ONE_ONLY (DECL))
+
+#define SUBTARGET_ATTRIBUTE_TABLE \
+ { "selectany", 0, 0, true, false, false, ix86_handle_selectany_attribute }
+ /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */
+
+/* mcount() does not need a counter variable. */
+#undef NO_PROFILE_COUNTERS
+#define NO_PROFILE_COUNTERS 1
+
+#define TARGET_VALID_DLLIMPORT_ATTRIBUTE_P i386_pe_valid_dllimport_attribute_p
+#define TARGET_CXX_ADJUST_CLASS_AT_DEFINITION i386_pe_adjust_class_at_definition
+#define TARGET_MANGLE_DECL_ASSEMBLER_NAME i386_pe_mangle_decl_assembler_name
+
+#undef TREE
+
+#ifndef BUFSIZ
+# undef FILE
+#endif