--- a/gcc/system.h	Fri Oct 27 22:46:09 2017 +0900
+++ b/gcc/system.h	Thu Oct 25 07:37:49 2018 +0900
@@ -1,6 +1,6 @@
 /* Get common system includes and various definitions and declarations based
    on autoconf macros.
-   Copyright (C) 1998-2017 Free Software Foundation, Inc.
+   Copyright (C) 1998-2018 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -824,6 +824,12 @@
 /* Some compilers do not allow the use of unsigned char in bitfields.  */
 #define BOOL_BITFIELD unsigned int
 
+/* GCC older than 4.4 have broken C++ value initialization handling, see
+   PR11309, PR30111, PR33916, PR82939 and PR84405 for more details.  */
+#if GCC_VERSION > 0 && GCC_VERSION < 4004 && !defined(__clang__)
+# define BROKEN_VALUE_INITIALIZATION
+#endif
+
 /* As the last action in this file, we poison the identifiers that
    shouldn't be used.  Note, luckily gcc-3.0's token-based integrated
    preprocessor won't trip on poisoned identifiers that arrive from
@@ -912,8 +918,6 @@
 	RETURN_POPS_ARGS UNITS_PER_SIMD_WORD OVERRIDE_OPTIONS		\
 	OPTIMIZATION_OPTIONS CLASS_LIKELY_SPILLED_P			\
 	USING_SJLJ_EXCEPTIONS TARGET_UNWIND_INFO			\
-	LABEL_ALIGN_MAX_SKIP LOOP_ALIGN_MAX_SKIP			\
-	LABEL_ALIGN_AFTER_BARRIER_MAX_SKIP JUMP_ALIGN_MAX_SKIP 		\
 	CAN_DEBUG_WITHOUT_FP UNLIKELY_EXECUTED_TEXT_SECTION_NAME	\
 	HOT_TEXT_SECTION_NAME LEGITIMATE_CONSTANT_P ALWAYS_STRIP_DOTDOT	\
 	OUTPUT_ADDR_CONST_EXTRA SMALL_REGISTER_CLASSES ASM_OUTPUT_IDENT	\
@@ -1018,7 +1022,8 @@
 	ROUND_TOWARDS_ZERO SF_SIZE DF_SIZE XF_SIZE TF_SIZE LIBGCC2_TF_CEXT \
 	LIBGCC2_LONG_DOUBLE_TYPE_SIZE STRUCT_VALUE			   \
 	EH_FRAME_IN_DATA_SECTION TARGET_FLT_EVAL_METHOD_NON_DEFAULT	   \
-	JCR_SECTION_NAME TARGET_USE_JCR_SECTION
+	JCR_SECTION_NAME TARGET_USE_JCR_SECTION SDB_DEBUGGING_INFO	   \
+	SDB_DEBUG NO_IMPLICIT_EXTERN_C
 
 /* Hooks that are no longer used.  */
  #pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE	\
@@ -1192,14 +1197,15 @@
 /* Get definitions of HOST_WIDE_INT.  */
 #include "hwint.h"
 
-/* qsort comparator consistency checking: except in release-checking compilers,
-   redirect 4-argument qsort calls to qsort_chk; keep 1-argument invocations
+/* GCC qsort API-compatible functions: except in release-checking compilers,
+   redirect 4-argument qsort calls to gcc_qsort; keep 1-argument invocations
    corresponding to vec::qsort (cmp): they use C qsort internally anyway.  */
-#if CHECKING_P
+void qsort_chk (void *, size_t, size_t, int (*)(const void *, const void *));
+void gcc_qsort (void *, size_t, size_t, int (*)(const void *, const void *));
+void gcc_stablesort (void *, size_t, size_t,
+		     int (*)(const void *, const void *));
 #define PP_5th(a1, a2, a3, a4, a5, ...) a5
 #undef qsort
-#define qsort(...) PP_5th (__VA_ARGS__, qsort_chk, 3, 2, qsort, 0) (__VA_ARGS__)
-void qsort_chk (void *, size_t, size_t, int (*)(const void *, const void *));
-#endif
+#define qsort(...) PP_5th (__VA_ARGS__, gcc_qsort, 3, 2, qsort, 0) (__VA_ARGS__)
 
 #endif /* ! GCC_SYSTEM_H */