--- a/gcc/config/mips/linux.h	Sun Aug 21 07:07:55 2011 +0900
+++ b/gcc/config/mips/linux.h	Fri Oct 27 22:46:09 2017 +0900
@@ -1,6 +1,5 @@
 /* Definitions for MIPS running Linux-based GNU systems with ELF format.
-   Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
-   2007, 2008, 2010, 2011 Free Software Foundation, Inc.
+   Copyright (C) 1998-2017 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -18,134 +17,36 @@
 along with GCC; see the file COPYING3.  If not see
 <http://www.gnu.org/licenses/>.  */
 
-#undef WCHAR_TYPE
-#define WCHAR_TYPE "int"
-
-#undef WCHAR_TYPE_SIZE
-#define WCHAR_TYPE_SIZE 32
-
-#undef ASM_DECLARE_OBJECT_NAME
-#define ASM_DECLARE_OBJECT_NAME mips_declare_object_name
-
-#undef TARGET_VERSION
-#if TARGET_ENDIAN_DEFAULT == 0
-#define TARGET_VERSION fprintf (stderr, " (MIPSel GNU/Linux with ELF)");
-#else
-#define TARGET_VERSION fprintf (stderr, " (MIPS GNU/Linux with ELF)");
-#endif
-
-/* If we don't set MASK_ABICALLS, we can't default to PIC.  */
-#undef TARGET_DEFAULT
-#define TARGET_DEFAULT MASK_ABICALLS
-
-#define TARGET_OS_CPP_BUILTINS()				\
-  do {								\
-    LINUX_TARGET_OS_CPP_BUILTINS();				\
-    /* The GNU C++ standard library requires this.  */		\
-    if (c_dialect_cxx ())					\
-      builtin_define ("_GNU_SOURCE");				\
-  } while (0)
-
-#undef SUBTARGET_CPP_SPEC
-#define SUBTARGET_CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
+#define GNU_USER_LINK_EMULATION32 "elf32%{EB:b}%{EL:l}tsmip"
+#define GNU_USER_LINK_EMULATION64 "elf64%{EB:b}%{EL:l}tsmip"
+#define GNU_USER_LINK_EMULATIONN32 "elf32%{EB:b}%{EL:l}tsmipn32"
 
-/* A standard GNU/Linux mapping.  On most targets, it is included in
-   CC1_SPEC itself by config/linux.h, but mips.h overrides CC1_SPEC
-   and provides this hook instead.  */
-#undef SUBTARGET_CC1_SPEC
-#define SUBTARGET_CC1_SPEC "%{profile:-p}"
-
-/* From iris5.h */
-/* -G is incompatible with -KPIC which is the default, so only allow objects
-   in the small data section if the user explicitly asks for it.  */
-#undef MIPS_DEFAULT_GVALUE
-#define MIPS_DEFAULT_GVALUE 0
-
-#define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
-
-/* Borrowed from sparc/linux.h */
-#undef LINK_SPEC
-#define LINK_SPEC \
- "%(endian_spec) \
-  %{shared:-shared} \
-  %{!shared: \
-    %{!static: \
-      %{rdynamic:-export-dynamic} \
-      -dynamic-linker " LINUX_DYNAMIC_LINKER "} \
-      %{static:-static}}"
-
-#undef SUBTARGET_ASM_SPEC
-#define SUBTARGET_ASM_SPEC \
-  "%{!mno-abicalls:%{mplt:-call_nonpic;:-KPIC}}"
-
-/* The MIPS assembler has different syntax for .set. We set it to
-   .dummy to trap any errors.  */
-#undef SET_ASM_OP
-#define SET_ASM_OP "\t.dummy\t"
+#define GLIBC_DYNAMIC_LINKER32 \
+  "%{mnan=2008:/lib/ld-linux-mipsn8.so.1;:/lib/ld.so.1}"
+#define GLIBC_DYNAMIC_LINKER64 \
+  "%{mnan=2008:/lib64/ld-linux-mipsn8.so.1;:/lib64/ld.so.1}"
+#define GLIBC_DYNAMIC_LINKERN32 \
+  "%{mnan=2008:/lib32/ld-linux-mipsn8.so.1;:/lib32/ld.so.1}"
 
-#undef ASM_OUTPUT_DEF
-#define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)				\
- do {									\
-	fputc ( '\t', FILE);						\
-	assemble_name (FILE, LABEL1);					\
-	fputs ( " = ", FILE);						\
-	assemble_name (FILE, LABEL2);					\
-	fputc ( '\n', FILE);						\
- } while (0)
-
-/* The glibc _mcount stub will save $v0 for us.  Don't mess with saving
-   it, since ASM_OUTPUT_REG_PUSH/ASM_OUTPUT_REG_POP do not work in the
-   presence of $gp-relative calls.  */
-#undef ASM_OUTPUT_REG_PUSH
-#undef ASM_OUTPUT_REG_POP
-
-#undef LIB_SPEC
-#define LIB_SPEC "\
-%{pthread:-lpthread} \
-%{shared:-lc} \
-%{!shared: \
-  %{profile:-lc_p} %{!profile:-lc}}"
-
-#define MD_UNWIND_SUPPORT "config/mips/linux-unwind.h"
-
-#ifdef HAVE_AS_NO_SHARED
-/* Default to -mno-shared for non-PIC.  */
-# define NO_SHARED_SPECS \
-  "%{mshared|mno-shared|fpic|fPIC|fpie|fPIE:;:-mno-shared}"
-#else
-# define NO_SHARED_SPECS ""
-#endif
+#undef UCLIBC_DYNAMIC_LINKER32
+#define UCLIBC_DYNAMIC_LINKER32 \
+  "%{mnan=2008:/lib/ld-uClibc-mipsn8.so.0;:/lib/ld-uClibc.so.0}"
+#undef UCLIBC_DYNAMIC_LINKER64
+#define UCLIBC_DYNAMIC_LINKER64 \
+  "%{mnan=2008:/lib/ld64-uClibc-mipsn8.so.0;:/lib/ld64-uClibc.so.0}"
+#define UCLIBC_DYNAMIC_LINKERN32 \
+  "%{mnan=2008:/lib32/ld-uClibc-mipsn8.so.0;:/lib32/ld-uClibc.so.0}"
 
-/* -march=native handling only makes sense with compiler running on
-   a MIPS chip.  */
-#if defined(__mips__)
-extern const char *host_detect_local_cpu (int argc, const char **argv);
-# define EXTRA_SPEC_FUNCTIONS \
-  { "local_cpu_detect", host_detect_local_cpu },
-
-# define MARCH_MTUNE_NATIVE_SPECS				\
-  " %{march=native:%<march=native %:local_cpu_detect(arch)}"	\
-  " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
-#else
-# define MARCH_MTUNE_NATIVE_SPECS ""
-#endif
+#undef MUSL_DYNAMIC_LINKER32
+#define MUSL_DYNAMIC_LINKER32 \
+  "/lib/ld-musl-mips%{mips32r6|mips64r6:r6}%{EL:el}%{msoft-float:-sf}.so.1"
+#undef MUSL_DYNAMIC_LINKER64
+#define MUSL_DYNAMIC_LINKER64 \
+  "/lib/ld-musl-mips64%{mips64r6:r6}%{EL:el}%{msoft-float:-sf}.so.1"
+#define MUSL_DYNAMIC_LINKERN32 \
+  "/lib/ld-musl-mipsn32%{mips64r6:r6}%{EL:el}%{msoft-float:-sf}.so.1"
 
-#define LINUX_DRIVER_SELF_SPECS \
-  NO_SHARED_SPECS							\
-  MARCH_MTUNE_NATIVE_SPECS,						\
-  /* -mplt has no effect without -mno-shared.  Simplify later		\
-     specs handling by removing a redundant option.  */			\
-  "%{!mno-shared:%<mplt}",						\
-  /* -mplt likewise has no effect for -mabi=64 without -msym32.  */	\
-  "%{mabi=64:%{!msym32:%<mplt}}"
-
-#undef DRIVER_SELF_SPECS
-#define DRIVER_SELF_SPECS \
-  BASE_DRIVER_SELF_SPECS, \
-  LINUX_DRIVER_SELF_SPECS
-
-/* Similar to standard Linux, but adding -ffast-math support.  */
-#undef  ENDFILE_SPEC
-#define ENDFILE_SPEC \
-  "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
-   %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"
+#define BIONIC_DYNAMIC_LINKERN32 "/system/bin/linker32"
+#define GNU_USER_DYNAMIC_LINKERN32 \
+  CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKERN32, UCLIBC_DYNAMIC_LINKERN32, \
+                         BIONIC_DYNAMIC_LINKERN32, MUSL_DYNAMIC_LINKERN32)