--- a/gcc/config/i386/linux.h	Sun Aug 21 07:07:55 2011 +0900
+++ b/gcc/config/i386/linux.h	Fri Oct 27 22:46:09 2017 +0900
@@ -1,6 +1,5 @@
 /* Definitions for Intel 386 running Linux-based GNU systems with ELF format.
-   Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2001, 2002, 2004, 2005,
-   2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
+   Copyright (C) 1994-2017 Free Software Foundation, Inc.
    Contributed by Eric Youngdale.
    Modified for stabs-in-ELF by H.J. Lu.
 
@@ -20,196 +19,8 @@
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
-/* Output at beginning of assembler file.  */
-/* The .file command should always begin the output.  */
-#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true
-
-#define TARGET_VERSION fprintf (stderr, " (i386 Linux/ELF)");
-
-/* The svr4 ABI for the i386 says that records and unions are returned
-   in memory.  */
-#undef DEFAULT_PCC_STRUCT_RETURN
-#define DEFAULT_PCC_STRUCT_RETURN 1
-
-/* We arrange for the whole %gs segment to map the tls area.  */
-#undef TARGET_TLS_DIRECT_SEG_REFS_DEFAULT
-#define TARGET_TLS_DIRECT_SEG_REFS_DEFAULT MASK_TLS_DIRECT_SEG_REFS
-
-#undef ASM_COMMENT_START
-#define ASM_COMMENT_START "#"
-
-#undef DBX_REGISTER_NUMBER
-#define DBX_REGISTER_NUMBER(n) \
-  (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n])
-
-/* Output assembler code to FILE to call the profiler.
-   To the best of my knowledge, no Linux libc has required the label
-   argument to mcount.  */
-
-#define NO_PROFILE_COUNTERS	1
-
-#undef MCOUNT_NAME
-#define MCOUNT_NAME "mcount"
-
-/* The GLIBC version of mcount for the x86 assumes that there is a
-   frame, so we cannot allow profiling without a frame pointer.  */
-
-#undef SUBTARGET_FRAME_POINTER_REQUIRED
-#define SUBTARGET_FRAME_POINTER_REQUIRED crtl->profile
-
-#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
-    
-#define TARGET_OS_CPP_BUILTINS()		\
-  do						\
-    {						\
-	LINUX_TARGET_OS_CPP_BUILTINS();		\
-    }						\
-  while (0)
-
-#undef CPP_SPEC
-#define CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
-
-#undef CC1_SPEC
-#define CC1_SPEC "%(cc1_cpu) %{profile:-p}"
-
-/* Provide a LINK_SPEC appropriate for 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.  */
-
-/* These macros may be overridden in k*bsd-gnu.h and i386/k*bsd-gnu.h. */
-#define LINK_EMULATION "elf_i386"
+#define GNU_USER_LINK_EMULATION "elf_i386"
 #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
 
-#undef  ASM_SPEC
-#define ASM_SPEC \
-  "--32 %{!mno-sse2avx:%{mavx:-msse2avx}} %{msse2avx:%{!mavx:-msse2avx}}"
-
-#undef  SUBTARGET_EXTRA_SPECS
-#define SUBTARGET_EXTRA_SPECS \
-  { "link_emulation", LINK_EMULATION },\
-  { "dynamic_linker", LINUX_DYNAMIC_LINKER }
-
-#undef	LINK_SPEC
-#define LINK_SPEC "-m %(link_emulation) %{shared:-shared} \
-  %{!shared: \
-    %{!static: \
-      %{rdynamic:-export-dynamic} \
-      -dynamic-linker %(dynamic_linker)} \
-      %{static:-static}}"
-
-/* Similar to standard Linux, but adding -ffast-math support.  */
-#undef  ENDFILE_SPEC
-#define ENDFILE_SPEC \
-  "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
-   %{mpc32:crtprec32.o%s} \
-   %{mpc64:crtprec64.o%s} \
-   %{mpc80:crtprec80.o%s} \
-   %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"
-
-/* 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)
-
-/* A C statement to output to the stdio stream FILE an assembler
-   command to advance the location counter to a multiple of 1<<LOG
-   bytes if it is within MAX_SKIP bytes.
-
-   This is used to align code labels according to Intel recommendations.  */
-
-#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
-#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP)			\
-  do {									\
-    if ((LOG) != 0) {							\
-      if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG));	\
-      else {								\
-	fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));	\
-	/* Make sure that we have at least 8 byte alignment if > 8 byte \
-	   alignment is preferred.  */					\
-	if ((LOG) > 3							\
-	    && (1 << (LOG)) > ((MAX_SKIP) + 1)				\
-	    && (MAX_SKIP) >= 7)						\
-	  fputs ("\t.p2align 3\n", (FILE));				\
-      }									\
-    }									\
-  } while (0)
-#endif
-
-/* Handle special EH pointer encodings.  Absolute, pc-relative, and
-   indirect are handled automatically.  */
-#define ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX(FILE, ENCODING, SIZE, ADDR, DONE) \
-  do {									\
-    if ((SIZE) == 4 && ((ENCODING) & 0x70) == DW_EH_PE_datarel)		\
-      {									\
-        fputs (ASM_LONG, FILE);			\
-        assemble_name (FILE, XSTR (ADDR, 0));				\
-	fputs (((ENCODING) & DW_EH_PE_indirect ? "@GOT" : "@GOTOFF"), FILE); \
-        goto DONE;							\
-      }									\
-  } while (0)
-
-/* Used by crtstuff.c to initialize the base of data-relative relocations.
-   These are GOT relative on x86, so return the pic register.  */
-#ifdef __PIC__
-#define CRT_GET_RFIB_DATA(BASE)			\
-  {						\
-    register void *ebx_ __asm__("ebx");		\
-    BASE = ebx_;				\
-  }
-#else
-#define CRT_GET_RFIB_DATA(BASE)						\
-  __asm__ ("call\t.LPR%=\n"						\
-	   ".LPR%=:\n\t"						\
-	   "pop{l}\t%0\n\t"						\
-	   /* Due to a GAS bug, this cannot use EAX.  That encodes	\
-	      smaller than the traditional EBX, which results in the	\
-	      offset being off by one.  */				\
-	   "add{l}\t{$_GLOBAL_OFFSET_TABLE_+[.-.LPR%=],%0"		\
-		   "|%0,_GLOBAL_OFFSET_TABLE_+(.-.LPR%=)}"		\
-	   : "=d"(BASE))
-#endif
-
-/* Put all *tf routines in libgcc.  */
-#undef LIBGCC2_HAS_TF_MODE
-#define LIBGCC2_HAS_TF_MODE 1
-#define LIBGCC2_TF_CEXT q
-#define TF_SIZE 113
-
-#define TARGET_ASM_FILE_END file_end_indicate_exec_stack
-
-#define MD_UNWIND_SUPPORT "config/i386/linux-unwind.h"
-
-/* The stack pointer needs to be moved while checking the stack.  */
-#define STACK_CHECK_MOVING_SP 1
-
-/* Static stack checking is supported by means of probes.  */
-#define STACK_CHECK_STATIC_BUILTIN 1
-
-/* This macro may be overridden in i386/k*bsd-gnu.h.  */
-#define REG_NAME(reg) reg
-
-#ifdef TARGET_LIBC_PROVIDES_SSP
-/* i386 glibc provides __stack_chk_guard in %gs:0x14.  */
-#define TARGET_THREAD_SSP_OFFSET	0x14
-
-/* We steal the last transactional memory word.  */
-#define TARGET_CAN_SPLIT_STACK
-#define TARGET_THREAD_SPLIT_STACK_OFFSET 0x30
-#endif
+#undef MUSL_DYNAMIC_LINKER
+#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-i386.so.1"