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diff --git a/gcc-4.9/gcc/config/m68k/linux.h b/gcc-4.9/gcc/config/m68k/linux.h
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+/* Definitions for Motorola 68k running Linux-based GNU systems with
+ ELF format.
+ Copyright (C) 1995-2014 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
+<http://www.gnu.org/licenses/>. */
+
+/* Add %(asm_cpu_spec) to a generic definition of ASM_SPEC. */
+#undef ASM_SPEC
+#define ASM_SPEC "%(asm_cpu_spec) %(asm_pcrel_spec)"
+
+#undef PREFERRED_STACK_BOUNDARY
+#define PREFERRED_STACK_BOUNDARY 32
+
+/* for 68k machines this only needs to be TRUE for the 68000 */
+
+#undef STRICT_ALIGNMENT
+#define STRICT_ALIGNMENT 0
+#undef M68K_HONOR_TARGET_STRICT_ALIGNMENT
+#define M68K_HONOR_TARGET_STRICT_ALIGNMENT 0
+
+/* Here are four prefixes that are used by asm_fprintf to
+ facilitate customization for alternate assembler syntaxes.
+ Machines with no likelihood of an alternate syntax need not
+ define these and need not use asm_fprintf. */
+
+/* The prefix for register names. Note that REGISTER_NAMES
+ is supposed to include this prefix. Also note that this is NOT an
+ fprintf format string, it is a literal string */
+
+#undef REGISTER_PREFIX
+#define REGISTER_PREFIX "%"
+
+/* The prefix for local (compiler generated) labels.
+ These labels will not appear in the symbol table. */
+
+#undef LOCAL_LABEL_PREFIX
+#define LOCAL_LABEL_PREFIX "."
+
+/* The prefix to add to user-visible assembler symbols. */
+
+#undef USER_LABEL_PREFIX
+#define USER_LABEL_PREFIX ""
+
+#define ASM_COMMENT_START "|"
+
+/* Target OS builtins. */
+#define TARGET_OS_CPP_BUILTINS() GNU_USER_TARGET_OS_CPP_BUILTINS()
+
+#undef CPP_SPEC
+#define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
+
+/* Provide a LINK_SPEC appropriate for GNU/Linux. Here we provide support
+ for the special GCC options -static and -shared, which allow us to
+ link things in one of these three modes by applying the appropriate
+ combinations of options at link-time.
+
+ When the -shared link option is used a final link is not being
+ done. */
+
+#define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
+
+#undef LINK_SPEC
+#define LINK_SPEC "-m m68kelf %{shared} \
+ %{!shared: \
+ %{!static: \
+ %{rdynamic:-export-dynamic} \
+ -dynamic-linker " GNU_USER_DYNAMIC_LINKER "} \
+ %{static}}"
+
+/* For compatibility with linux/a.out */
+
+#undef PCC_BITFIELD_TYPE_MATTERS
+
+/* Currently, JUMP_TABLES_IN_TEXT_SECTION must be defined in order to
+ keep switch tables in the text section. */
+
+#define JUMP_TABLES_IN_TEXT_SECTION 1
+
+/* Use the default action for outputting the case label. */
+#undef ASM_OUTPUT_CASE_LABEL
+#define ASM_RETURN_CASE_JUMP \
+ do { \
+ if (TARGET_COLDFIRE) \
+ { \
+ if (ADDRESS_REG_P (operands[0])) \
+ return "jmp %%pc@(2,%0:l)"; \
+ else \
+ return "ext%.l %0\n\tjmp %%pc@(2,%0:l)"; \
+ } \
+ else \
+ return "jmp %%pc@(2,%0:w)"; \
+ } while (0)
+
+/* 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), "%s%u\n", ALIGN_ASM_OP, 1 << (LOG));
+
+/* If defined, a C expression whose value is a string containing the
+ assembler operation to identify the following data as uninitialized global
+ data. */
+
+#define BSS_SECTION_ASM_OP "\t.section\t.bss"
+
+/* A C statement (sans semicolon) to output to the stdio stream
+ FILE the assembler definition of uninitialized global DECL named
+ NAME whose size is SIZE bytes and alignment is ALIGN bytes.
+ Try to use asm_output_aligned_bss to implement this macro. */
+
+#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
+ asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
+
+/* Output assembler code to FILE to increment profiler label # LABELNO
+ for profiling a function entry. */
+#define NO_PROFILE_COUNTERS 1
+#undef FUNCTION_PROFILER
+#define FUNCTION_PROFILER(FILE, LABELNO) \
+{ \
+ if (flag_pic) \
+ fprintf (FILE, "\tbsr.l _mcount@PLTPC\n"); \
+ else \
+ fprintf (FILE, "\tjbsr _mcount\n"); \
+}
+
+/* Do not break .stabs pseudos into continuations. */
+
+#define DBX_CONTIN_LENGTH 0
+
+/* 1 if N is a possible register number for a function value. For
+ m68k/SVR4 allow d0, a0, or fp0 as return registers, for integral,
+ pointer, or floating types, respectively. Reject fp0 if not using
+ a 68881 coprocessor. */
+
+#undef FUNCTION_VALUE_REGNO_P
+#define FUNCTION_VALUE_REGNO_P(N) \
+ ((N) == D0_REG || (N) == A0_REG || (TARGET_68881 && (N) == FP0_REG))
+
+/* Define this to be true when FUNCTION_VALUE_REGNO_P is true for
+ more than one register. */
+
+#undef NEEDS_UNTYPED_CALL
+#define NEEDS_UNTYPED_CALL 1
+
+/* Define how to generate (in the callee) the output value of a
+ function and how to find (in the caller) the value returned by a
+ function. VALTYPE is the data type of the value (as a tree). If
+ the precise function being called is known, FUNC is its
+ FUNCTION_DECL; otherwise, FUNC is 0. For m68k/SVR4 generate the
+ result in d0, a0, or fp0 as appropriate. */
+
+#undef FUNCTION_VALUE
+#define FUNCTION_VALUE(VALTYPE, FUNC) \
+ m68k_function_value (VALTYPE, FUNC)
+
+/* Define how to find the value returned by a library function
+ assuming the value has mode MODE.
+ For m68k/SVR4 look for integer values in d0, pointer values in d0
+ (returned in both d0 and a0), and floating values in fp0. */
+
+#undef LIBCALL_VALUE
+#define LIBCALL_VALUE(MODE) \
+ m68k_libcall_value (MODE)
+
+/* For m68k SVR4, structures are returned using the reentrant
+ technique. */
+#undef PCC_STATIC_STRUCT_RETURN
+#define DEFAULT_PCC_STRUCT_RETURN 0
+
+/* Finalize the trampoline by flushing the insn cache. */
+
+#undef FINALIZE_TRAMPOLINE
+#define FINALIZE_TRAMPOLINE(TRAMP) \
+ emit_library_call (gen_rtx_SYMBOL_REF (Pmode, "__clear_cache"), \
+ LCT_NORMAL, VOIDmode, 2, TRAMP, Pmode, \
+ plus_constant (Pmode, TRAMP, TRAMPOLINE_SIZE), \
+ Pmode);
+
+/* Clear the instruction cache from `beg' to `end'. This makes an
+ inline system call to SYS_cacheflush. The arguments are as
+ follows:
+
+ cacheflush (addr, scope, cache, len)
+
+ addr - the start address for the flush
+ scope - the scope of the flush (see the cpush insn)
+ cache - which cache to flush (see the cpush insn)
+ len - a factor relating to the number of flushes to perform:
+ len/16 lines, or len/4096 pages. */
+
+#define CLEAR_INSN_CACHE(BEG, END) \
+{ \
+ register unsigned long _beg __asm ("%d1") = (unsigned long) (BEG); \
+ unsigned long _end = (unsigned long) (END); \
+ register unsigned long _len __asm ("%d4") = (_end - _beg + 32); \
+ __asm __volatile \
+ ("move%.l #123, %/d0\n\t" /* system call nr */ \
+ "move%.l #1, %/d2\n\t" /* clear lines */ \
+ "move%.l #3, %/d3\n\t" /* insn+data caches */ \
+ "trap #0" \
+ : /* no outputs */ \
+ : "d" (_beg), "d" (_len) \
+ : "%d0", "%d2", "%d3"); \
+}
+
+#define TARGET_ASM_FILE_END file_end_indicate_exec_stack
+
+#undef DBX_REGISTER_NUMBER
+#define DBX_REGISTER_NUMBER(REGNO) (REGNO)
+
+#undef SIZE_TYPE
+#define SIZE_TYPE "unsigned int"
+
+#undef PTRDIFF_TYPE
+#define PTRDIFF_TYPE "int"
+
+#undef WCHAR_TYPE
+#define WCHAR_TYPE "long int"
+
+#undef WCHAR_TYPE_SIZE
+#define WCHAR_TYPE_SIZE BITS_PER_WORD
+
+/* Install the __sync libcalls. */
+#undef TARGET_INIT_LIBFUNCS
+#define TARGET_INIT_LIBFUNCS m68k_init_sync_libfuncs