xgcc: Update gcc 5 to 5.4.0

patches synced with buildroot trunk and:
110-xtensa-implement-trap-pattern.patch (copied to 5.4.0 patches)
130-build_gcc-5_with_gcc-6.patch (upstreamed in 5.4.0, dropped)
370-gcc-plugin-Win-Dont-need-undefined-extern-var-refs-nor-fpic.patch (copied to 5.4.0 patches)
380-gcc-plugin-POSIX-include-sys-select-h.patch (copied to 5.4.0 patches)
910-nios2-bad-multilib-default.patch (copied to 5.4.0 patches)

config/cc/gcc.in

@@ -72,9 +72,9 @@ choice
 # Don't remove next line
 # CT_INSERT_VERSION_BELOW
 
-config CC_GCC_V_5_3_0
+config CC_GCC_V_5_4_0
     bool
-    prompt "5.3.0"
+    prompt "5.4.0"
     select CC_GCC_5
 
 config CC_GCC_V_linaro_5_2
@@ -261,7 +261,7 @@ config CC_GCC_VERSION
     string
 # Don't remove next line
 # CT_INSERT_VERSION_STRING_BELOW
-    default "5.3.0" if CC_GCC_V_5_3_0
+    default "5.4.0" if CC_GCC_V_5_4_0
     default "linaro-5.2-2015.11-2" if CC_GCC_V_linaro_5_2
     default "linaro-4.9-2015.06" if CC_GCC_V_linaro_4_9
     default "4.9.3" if CC_GCC_V_4_9_3

patches/gcc/5.3.0/130-build_gcc-5_with_gcc-6.patch

@@ -1,151 +0,0 @@
-From 1e5f1089dec3af328fd03125d6778f666d0bd4e4 Mon Sep 17 00:00:00 2001
-From: edlinger <edlinger@138bc75d-0d04-0410-961f-82ee72b054a4>
-Date: Thu, 25 Feb 2016 15:33:50 +0000
-Subject: [PATCH 1/1] 2016-02-25  Bernd Edlinger  <bernd.edlinger@hotmail.de>
-
-        Backported from mainline
-        2016-02-19  Jakub Jelinek  <jakub@redhat.com>
-                    Bernd Edlinger  <bernd.edlinger@hotmail.de>
-
-        * Make-lang.in: Invoke gperf with -L C++.
-        * cfns.gperf: Remove prototypes for hash and libc_name_p
-        inlines.
-        * cfns.h: Regenerated.
-        * except.c (nothrow_libfn_p): Adjust.
-
-
-git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-5-branch@233720 138bc75d-0d04-0410-961f-82ee72b054a4
----
- gcc/cp/Make-lang.in |    2 +-
- gcc/cp/cfns.gperf   |   10 ++--------
- gcc/cp/cfns.h       |   41 ++++++++++++++---------------------------
- gcc/cp/except.c     |    3 ++-
- 5 files changed, 31 insertions(+), 37 deletions(-)
-
-diff --git a/gcc/cp/Make-lang.in b/gcc/cp/Make-lang.in
-index e98beb1..b09fb02 100644
---- a/gcc/cp/Make-lang.in
-+++ b/gcc/cp/Make-lang.in
-@@ -111,7 +111,7 @@ else
- # deleting the $(srcdir)/cp/cfns.h file.
- $(srcdir)/cp/cfns.h:
- endif
--	gperf -o -C -E -k '1-6,$$' -j1 -D -N 'libc_name_p' -L ANSI-C \
-+	gperf -o -C -E -k '1-6,$$' -j1 -D -N 'libc_name_p' -L C++ \
- 		$(srcdir)/cp/cfns.gperf --output-file $(srcdir)/cp/cfns.h
- 
- #
-diff --git a/gcc/cp/cfns.gperf b/gcc/cp/cfns.gperf
-index 68acd3d..214ecf6 100644
---- a/gcc/cp/cfns.gperf
-+++ b/gcc/cp/cfns.gperf
-@@ -1,3 +1,5 @@
-+%language=C++
-+%define class-name libc_name
- %{
- /* Copyright (C) 2000-2015 Free Software Foundation, Inc.
- 
-@@ -16,14 +18,6 @@ for more details.
- You should have received a copy of the GNU General Public License
- along with GCC; see the file COPYING3.  If not see
- <http://www.gnu.org/licenses/>.  */
--#ifdef __GNUC__
--__inline
--#endif
--static unsigned int hash (const char *, unsigned int);
--#ifdef __GNUC__
--__inline
--#endif
--const char * libc_name_p (const char *, unsigned int);
- %}
- %%
- # The standard C library functions, for feeding to gperf; the result is used
-diff --git a/gcc/cp/cfns.h b/gcc/cp/cfns.h
-index 1c6665d..596f413 100644
---- a/gcc/cp/cfns.h
-+++ b/gcc/cp/cfns.h
-@@ -1,5 +1,5 @@
--/* ANSI-C code produced by gperf version 3.0.3 */
--/* Command-line: gperf -o -C -E -k '1-6,$' -j1 -D -N libc_name_p -L ANSI-C cfns.gperf  */
-+/* C++ code produced by gperf version 3.0.4 */
-+/* Command-line: gperf -o -C -E -k '1-6,$' -j1 -D -N libc_name_p -L C++ --output-file cfns.h cfns.gperf  */
- 
- #if !((' ' == 32) && ('!' == 33) && ('"' == 34) && ('#' == 35) \
-       && ('%' == 37) && ('&' == 38) && ('\'' == 39) && ('(' == 40) \
-@@ -28,7 +28,7 @@
- #error "gperf generated tables don't work with this execution character set. Please report a bug to <bug-gnu-gperf@gnu.org>."
- #endif
- 
--#line 1 "cfns.gperf"
-+#line 3 "cfns.gperf"
- 
- /* Copyright (C) 2000-2015 Free Software Foundation, Inc.
- 
-@@ -47,25 +47,18 @@ 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/>.  */
--#ifdef __GNUC__
--__inline
--#endif
--static unsigned int hash (const char *, unsigned int);
--#ifdef __GNUC__
--__inline
--#endif
--const char * libc_name_p (const char *, unsigned int);
- /* maximum key range = 391, duplicates = 0 */
- 
--#ifdef __GNUC__
--__inline
--#else
--#ifdef __cplusplus
--inline
--#endif
--#endif
--static unsigned int
--hash (register const char *str, register unsigned int len)
-+class libc_name
-+{
-+private:
-+  static inline unsigned int hash (const char *str, unsigned int len);
-+public:
-+  static const char *libc_name_p (const char *str, unsigned int len);
-+};
-+
-+inline unsigned int
-+libc_name::hash (register const char *str, register unsigned int len)
- {
-   static const unsigned short asso_values[] =
-     {
-@@ -122,14 +115,8 @@ hash (register const char *str, register unsigned int len)
-   return hval + asso_values[(unsigned char)str[len - 1]];
- }
- 
--#ifdef __GNUC__
--__inline
--#ifdef __GNUC_STDC_INLINE__
--__attribute__ ((__gnu_inline__))
--#endif
--#endif
- const char *
--libc_name_p (register const char *str, register unsigned int len)
-+libc_name::libc_name_p (register const char *str, register unsigned int len)
- {
-   enum
-     {
-diff --git a/gcc/cp/except.c b/gcc/cp/except.c
-index 3ff1ce6..2f2e396 100644
---- a/gcc/cp/except.c
-+++ b/gcc/cp/except.c
-@@ -1040,7 +1040,8 @@ nothrow_libfn_p (const_tree fn)
-      unless the system headers are playing rename tricks, and if
-      they are, we don't want to be confused by them.  */
-   id = DECL_NAME (fn);
--  return !!libc_name_p (IDENTIFIER_POINTER (id), IDENTIFIER_LENGTH (id));
-+  return !!libc_name::libc_name_p (IDENTIFIER_POINTER (id),
-+				   IDENTIFIER_LENGTH (id));
- }
- 
- /* Returns nonzero if an exception of type FROM will be caught by a
--- 
-1.7.1

patches/gcc/5.4.0/874-xtensa-add-uclinux-support.patch

@@ -0,0 +1,174 @@
+From 70c2cb98fb129b4766b5da0f945dc41fd568c77a Mon Sep 17 00:00:00 2001
+From: Max Filippov <jcmvbkbc@gmail.com>
+Date: Sat, 22 Aug 2015 08:44:26 +0300
+Subject: [PATCH] xtensa: add uclinux support
+
+2015-10-03  Max Filippov  <jcmvbkbc@gmail.com>
+gcc/
+	* config.gcc (xtensa*-*-uclinux*): New configuration.
+	* config/xtensa/uclinux.h: New file.
+	* config/xtensa/uclinux.opt: New file.
+
+libgcc/
+	* config.host (xtensa*-*-uclinux*): New configuration.
+
+Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
+---
+Backported from: r228450
+
+ gcc/config.gcc                |  5 ++++
+ gcc/config/xtensa/uclinux.h   | 69 +++++++++++++++++++++++++++++++++++++++++++
+ gcc/config/xtensa/uclinux.opt | 32 ++++++++++++++++++++
+ libgcc/config.host            |  5 ++++
+ 4 files changed, 111 insertions(+)
+ create mode 100644 gcc/config/xtensa/uclinux.h
+ create mode 100644 gcc/config/xtensa/uclinux.opt
+
+diff --git a/gcc/config.gcc b/gcc/config.gcc
+index c52f5a8..56797bd 100644
+--- a/gcc/config.gcc
++++ b/gcc/config.gcc
+@@ -2995,6 +2995,11 @@ xtensa*-*-linux*)
+ 	tm_file="${tm_file} dbxelf.h elfos.h gnu-user.h linux.h glibc-stdint.h xtensa/linux.h"
+ 	tmake_file="${tmake_file} xtensa/t-xtensa"
+ 	;;
++xtensa*-*-uclinux*)
++	tm_file="${tm_file} dbxelf.h elfos.h gnu-user.h linux.h glibc-stdint.h xtensa/uclinux.h"
++	tmake_file="${tmake_file} xtensa/t-xtensa"
++	extra_options="${extra_options} xtensa/uclinux.opt"
++	;;
+ am33_2.0-*-linux*)
+ 	tm_file="mn10300/mn10300.h dbxelf.h elfos.h gnu-user.h linux.h glibc-stdint.h mn10300/linux.h"
+ 	gas=yes gnu_ld=yes
+diff --git a/gcc/config/xtensa/uclinux.h b/gcc/config/xtensa/uclinux.h
+new file mode 100644
+index 0000000..4606020
+--- /dev/null
++++ b/gcc/config/xtensa/uclinux.h
+@@ -0,0 +1,69 @@
++/* Xtensa uClinux configuration.
++   Derived from the configuration for GCC for Intel i386 running Linux.
++   Copyright (C) 2001-2015 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/>.  */
++
++#undef TARGET_OS_CPP_BUILTINS
++#define TARGET_OS_CPP_BUILTINS()				\
++  do								\
++    {								\
++      GNU_USER_TARGET_OS_CPP_BUILTINS ();			\
++      builtin_define ("__uClinux__");				\
++    }								\
++  while (0)
++
++#undef SUBTARGET_CPP_SPEC
++#define SUBTARGET_CPP_SPEC "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
++
++#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 32
++
++#undef ASM_SPEC
++#define ASM_SPEC \
++ "%{mtext-section-literals:--text-section-literals} \
++  %{mno-text-section-literals:--no-text-section-literals} \
++  %{mtarget-align:--target-align} \
++  %{mno-target-align:--no-target-align} \
++  %{mlongcalls:--longcalls} \
++  %{mno-longcalls:--no-longcalls} \
++  %{mauto-litpools:--auto-litpools} \
++  %{mno-auto-litpools:--no-auto-litpools}"
++
++#undef LINK_SPEC
++#define LINK_SPEC "%{!no-elf2flt:%{!elf2flt*:-elf2flt}}"
++
++#undef LOCAL_LABEL_PREFIX
++#define LOCAL_LABEL_PREFIX	"."
++
++/* Always enable "-fpic" for Xtensa Linux.  */
++#define XTENSA_ALWAYS_PIC 1
++
++#undef TARGET_LIBC_HAS_FUNCTION
++#define TARGET_LIBC_HAS_FUNCTION no_c99_libc_has_function
++
++#undef DBX_REGISTER_NUMBER
++
+diff --git a/gcc/config/xtensa/uclinux.opt b/gcc/config/xtensa/uclinux.opt
+new file mode 100644
+index 0000000..95ef777
+--- /dev/null
++++ b/gcc/config/xtensa/uclinux.opt
+@@ -0,0 +1,32 @@
++; Xtensa uClinux options.
++
++; Copyright (C) 2015 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/>.
++
++; See the GCC internals manual (options.texi) for a description of
++; this file's format.
++
++; Please try to keep this file in ASCII collating order.
++
++elf2flt
++Driver
++
++elf2flt=
++Driver JoinedOrMissing
++
++; This comment is to ensure we retain the blank line above.
+diff --git a/libgcc/config.host b/libgcc/config.host
+index 2c64756..2ee92c1 100644
+--- a/libgcc/config.host
++++ b/libgcc/config.host
+@@ -1295,6 +1295,11 @@ xtensa*-*-linux*)
+ 	tmake_file="$tmake_file xtensa/t-xtensa xtensa/t-linux t-slibgcc-libgcc"
+ 	md_unwind_header=xtensa/linux-unwind.h
+ 	;;
++xtensa*-*-uclinux*)
++	tmake_file="$tmake_file xtensa/t-xtensa xtensa/t-linux t-slibgcc-libgcc"
++	md_unwind_header=xtensa/linux-unwind.h
++	extra_parts="$extra_parts crtbeginS.o crtbeginT.o crtendS.o"
++	;;
+ am33_2.0-*-linux*)
+ 	# Don't need crtbeginT.o from *-*-linux* default.
+ 	extra_parts="crtbegin.o crtend.o crtbeginS.o crtendS.o"
+-- 
+1.8.1.4
+

patches/gcc/5.4.0/890-fix-m68k-compile.patch

@@ -0,0 +1,15 @@
+remove unused header, which breaks the toolchain building
+
+Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
+
+diff -Nur gcc-5.3.0.orig/libgcc/config/m68k/linux-atomic.c gcc-5.3.0/libgcc/config/m68k/linux-atomic.c
+--- gcc-5.3.0.orig/libgcc/config/m68k/linux-atomic.c	2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/libgcc/config/m68k/linux-atomic.c	2016-03-19 09:25:07.000000000 +0100
+@@ -33,7 +33,6 @@
+    using the kernel helper defined below.  There is no support for
+    64-bit operations yet.  */
+ 
+-#include <asm/unistd.h>
+ #include <stdbool.h>
+ 
+ #ifndef __NR_atomic_cmpxchg_32

patches/gcc/5.4.0/891-fix-m68k-uclinux.patch

@@ -0,0 +1,18 @@
+avoids internal compiler error while compiling linux-atomic.c
+See here:
+https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53833
+
+Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
+
+diff -Nur gcc-5.3.0.orig/libgcc/config.host gcc-5.3.0/libgcc/config.host
+--- gcc-5.3.0.orig/libgcc/config.host	2015-10-01 14:01:18.000000000 +0200
++++ gcc-5.3.0/libgcc/config.host	2016-04-26 21:30:25.353691745 +0200
+@@ -794,7 +794,7 @@
+ m68k*-*-openbsd*)
+ 	;;
+ m68k-*-uclinux*)	# Motorola m68k/ColdFire running uClinux with uClibc
+-	tmake_file="$tmake_file m68k/t-floatlib m68k/t-linux"
++	tmake_file="$tmake_file m68k/t-floatlib"
+ 	md_unwind_header=m68k/linux-unwind.h
+ 	;;
+ m68k-*-linux*)			# Motorola m68k's running GNU/Linux

patches/gcc/5.4.0/892-microblaze-uclibc.patch

@@ -0,0 +1,24 @@
+Add dynamic linker support for uClibc
+
+Signed-off-by: Waldemar Brodkorb <wbx@uclibc-ng.org>
+
+diff -Nur gcc-5.3.0.orig/gcc/config/microblaze/linux.h gcc-5.3.0/gcc/config/microblaze/linux.h
+--- gcc-5.3.0.orig/gcc/config/microblaze/linux.h	2015-05-28 16:08:19.000000000 +0200
++++ gcc-5.3.0/gcc/config/microblaze/linux.h	2016-05-13 09:21:01.579262885 +0200
+@@ -28,7 +28,15 @@
+ #undef TLS_NEEDS_GOT
+ #define TLS_NEEDS_GOT 1
+ 
+-#define DYNAMIC_LINKER "/lib/ld.so.1"
++#define GLIBC_DYNAMIC_LINKER	"/lib/ld.so.1"
++#define UCLIBC_DYNAMIC_LINKER "/lib/ld-uClibc.so.0"
++
++#if DEFAULT_LIBC == LIBC_UCLIBC
++#define DYNAMIC_LINKER UCLIBC_DYNAMIC_LINKER
++#else
++#define DYNAMIC_LINKER GLIBC_DYNAMIC_LINKER
++#endif
++
+ #undef  SUBTARGET_EXTRA_SPECS
+ #define SUBTARGET_EXTRA_SPECS \
+   { "dynamic_linker", DYNAMIC_LINKER }

patches/gcc/5.4.0/930-libgcc-disable-split-stack-nothreads.patch

@@ -0,0 +1,14 @@
+disable split-stack for non-thread builds
+
+Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
+
+diff -Nur gcc-5.3.0.orig/libgcc/config/t-stack gcc-5.3.0/libgcc/config/t-stack
+--- gcc-5.3.0.orig/libgcc/config/t-stack	2010-10-01 21:31:49.000000000 +0200
++++ gcc-5.3.0/libgcc/config/t-stack	2016-03-07 03:25:32.000000000 +0100
+@@ -1,4 +1,6 @@
+ # Makefile fragment to provide generic support for -fsplit-stack.
+ # This should be used in config.host for any host which supports
+ # -fsplit-stack.
++ifeq ($(enable_threads),yes)
+ LIB2ADD_ST += $(srcdir)/generic-morestack.c $(srcdir)/generic-morestack-thread.c
++endif

patches/gcc/5.4.0/940-uclinux-enable-threads.patch

@@ -0,0 +1,19 @@
+Enable POSIX threads for uClinux targets
+Reported upstream:
+https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71721
+
+Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
+
+diff -Nur gcc-5.4.0.orig/gcc/config.gcc gcc-5.4.0/gcc/config.gcc
+--- gcc-5.4.0.orig/gcc/config.gcc	2015-09-10 16:17:53.000000000 +0200
++++ gcc-5.4.0/gcc/config.gcc	2016-07-01 21:26:02.772958441 +0200
+@@ -808,6 +808,9 @@
+ *-*-uclinux*)
+   extra_options="$extra_options gnu-user.opt"
+   use_gcc_stdint=wrap
++  case ${enable_threads} in
++    "" | yes | posix) thread_file='posix' ;;
++  esac
+   tm_defines="$tm_defines DEFAULT_LIBC=LIBC_UCLIBC SINGLE_LIBC"
+   ;;
+ *-*-rdos*)