add gcc-6.3 patchset

14 files changed, 440 insertions, 0 deletions

diff --git a/6.3.0/gentoo/10_all_default-fortify-source.patch b/6.3.0/gentoo/10_all_default-fortify-source.patch
new file mode 100644
index 0000000..36c5762
--- /dev/null
+++ b/6.3.0/gentoo/10_all_default-fortify-source.patch
@@ -0,0 +1,15 @@
+Enable -D_FORTIFY_SOURCE=2 by default.
+
+
+--- a/gcc/c-family/c-cppbuiltin.c
++++ b/gcc/c-family/c-cppbuiltin.c
+@@ -951,6 +951,9 @@ c_cpp_builtins (cpp_reader *pfile)
+   builtin_define_with_value ("__REGISTER_PREFIX__", REGISTER_PREFIX, 0);
+   builtin_define_with_value ("__USER_LABEL_PREFIX__", user_label_prefix, 0);
+ 
++  /* Fortify Source enabled by default w/optimization.  */
++  cpp_define (pfile, "_FORTIFY_SOURCE=((defined __OPTIMIZE__ && __OPTIMIZE__ > 0) ? 2 : 0)");
++
+   /* Misc.  */
+   if (flag_gnu89_inline)
+     cpp_define (pfile, "__GNUC_GNU_INLINE__");
diff --git a/6.3.0/gentoo/11_all_default-warn-format-security.patch b/6.3.0/gentoo/11_all_default-warn-format-security.patch
new file mode 100644
index 0000000..8994654
--- /dev/null
+++ b/6.3.0/gentoo/11_all_default-warn-format-security.patch
@@ -0,0 +1,22 @@
+Enable -Wformat and -Wformat-security by default.
+
+--- a/gcc/c-family/c.opt	2016-03-23 18:51:56.000000000 +0100
++++ b/gcc/c-family/c.opt	2016-04-28 23:45:54.063351272 +0200
+@@ -459,7 +459,7 @@ C ObjC C++ ObjC++ Var(warn_format_nonlit
+ Warn about format strings that are not literals.
+ 
+ Wformat-security
+-C ObjC C++ ObjC++ Var(warn_format_security) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=, warn_format >= 2, 0)
++C ObjC C++ ObjC++ Var(warn_format_security) Init(1) Warning LangEnabledBy(C ObjC C++ ObjC++,Wformat=, warn_format >= 2, 0)
+ Warn about possible security problems with format functions.
+ 
+ Wformat-signedness
+@@ -475,7 +475,7 @@ C ObjC C++ ObjC++ Var(warn_format_zero_l
+ Warn about zero-length formats.
+ 
+ Wformat=
+-C ObjC C++ ObjC++ Joined RejectNegative UInteger Var(warn_format) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall, 1, 0)
++C ObjC C++ ObjC++ Joined RejectNegative UInteger Var(warn_format) Init(1) Warning LangEnabledBy(C ObjC C++ ObjC++,Wall, 1, 0)
+ Warn about printf/scanf/strftime/strfmon format string anomalies.
+ 
+ Wignored-qualifiers
diff --git a/6.3.0/gentoo/12_all_default-warn-trampolines.patch b/6.3.0/gentoo/12_all_default-warn-trampolines.patch
new file mode 100644
index 0000000..7a644cb
--- /dev/null
+++ b/6.3.0/gentoo/12_all_default-warn-trampolines.patch
@@ -0,0 +1,13 @@
+Enable -Wtrampolines by default.
+
+--- a/gcc/common.opt
++++ b/gcc/common.opt
+@@ -712,7 +712,7 @@ Common Var(warn_system_headers) Warning
+ Do not suppress warnings from system headers.
+ 
+ Wtrampolines
+-Common Var(warn_trampolines) Warning
++Common Var(warn_trampolines) Init(1) Warning
+ Warn whenever a trampoline is generated.
+ 
+ Wtype-limits
diff --git a/6.3.0/gentoo/13_all_default-ssp-fix.patch b/6.3.0/gentoo/13_all_default-ssp-fix.patch
new file mode 100644
index 0000000..0362487
--- /dev/null
+++ b/6.3.0/gentoo/13_all_default-ssp-fix.patch
@@ -0,0 +1,55 @@
+We disable ssp on -nostdlib and -ffreestanding as we did on older gcc
+and change the buffer size.
+
+--- a/gcc/c-family/c-opts.c	2016-03-08 23:30:44.000000000 +0100
++++ b/gcc/c-family/c-opts.c	2016-09-18 18:42:10.231644014 +0200
+@@ -436,7 +436,15 @@ c_common_handle_option (size_t scode, co
+ 
+     case OPT_ffreestanding:
+       value = !value;
++	  if (global_options.x_flag_stack_protect == -1)
++		global_options.x_flag_stack_protect = 0;
+       /* Fall through....  */
++
++	case OPT_nostdlib:
++	  if (global_options.x_flag_stack_protect == -1)
++		global_options.x_flag_stack_protect = 0;
++	  /* Fall through....  */
++
+     case OPT_fhosted:
+       flag_hosted = value;
+       flag_no_builtin = !value;
+--- a/gcc/c-family/c.opt	2016-03-23 18:51:56.000000000 +0100
++++ b/gcc/c-family/c.opt	2016-09-18 18:46:17.071649782 +0200
+@@ -1647,6 +1647,10 @@ nostdinc++
+ C++ ObjC++
+ Do not search standard system include directories for C++.
+ 
++nostdlib
++C ObjC C++ ObjC++
++; Documented in common.opt
++
+ o
+ C ObjC C++ ObjC++ Joined Separate
+ ; Documented in common.opt
+--- a/gcc/gcc.c	2016-02-19 23:18:38.000000000 +0100
++++ b/gcc/gcc.c	2016-09-18 18:47:35.621651618 +0200
+@@ -1132,6 +1143,7 @@ static const char *cc1_options =
+  %{-help=*:--help=%*}\
+  %{!fsyntax-only:%{S:%W{o*}%{!o*:-o %b.s}}}\
+  %{fsyntax-only:-o %j} %{-param*}\
++ %{nostdlib:-nostdlib}\
+  %{coverage:-fprofile-arcs -ftest-coverage}";
+ 
+ static const char *asm_options =
+--- a/gcc/params.def	2016-03-30 09:47:40.000000000 +0200
++++ b/gcc/params.def	2016-09-19 12:56:58.443179039 +0200
+@@ -673,7 +673,7 @@ DEFPARAM (PARAM_INTEGER_SHARE_LIMIT,
+ DEFPARAM (PARAM_SSP_BUFFER_SIZE,
+ 	  "ssp-buffer-size",
+ 	  "The lower bound for a buffer to be considered for stack smashing protection.",
+-	  8, 1, 0)
++	  4, 1, 0)
+ 
+ DEFPARAM (PARAM_MIN_SIZE_FOR_STACK_SHARING,
+ 	  "min-size-for-stack-sharing",
diff --git a/6.3.0/gentoo/25_all_alpha-mieee-default.patch b/6.3.0/gentoo/25_all_alpha-mieee-default.patch
new file mode 100644
index 0000000..86c5bfe
--- /dev/null
+++ b/6.3.0/gentoo/25_all_alpha-mieee-default.patch
@@ -0,0 +1,38 @@
+Set the default behavior on alpha to use -mieee since the large majority of
+time we want this (bad/weird things can happen with packages built without
+it).
+
+To satisfy those people who may not want -mieee forced on them all the time,
+we also provide -mno-ieee.
+
+Patch by Mike Frysinger <vapier@gentoo.org>
+
+Note: upstream doesn't want to take this due to long standing behavior, and
+because it'd make behavior across OS's inconsistent:
+	https://gcc.gnu.org/ml/gcc-patches/2003-07/msg02144.html
+
+This makes sense for upstream, but Gentoo is more concerned about packages
+behaving the same across arches under Linux.
+
+--- a/gcc/config/alpha/alpha.h
++++ b/gcc/config/alpha/alpha.h
+@@ -96,6 +96,8 @@ along with GCC; see the file COPYING3.  If not see
+   while (0)
+ #endif
+ 
++#define CPP_SPEC "%{!no-ieee:-mieee}"
++
+ /* Run-time compilation parameters selecting different hardware subsets.  */
+ 
+ /* Which processor to schedule for. The cpu attribute defines a list that
+--- a/gcc/config/alpha/alpha.opt
++++ b/gcc/config/alpha/alpha.opt
+@@ -39,7 +39,7 @@ Target RejectNegative Mask(IEEE_CONFORMANT)
+ Request IEEE-conformant math library routines (OSF/1).
+ 
+ mieee
+-Target Report RejectNegative Mask(IEEE)
++Target Report Mask(IEEE)
+ Emit IEEE-conformant code, without inexact exceptions.
+ 
+ mieee-with-inexact
diff --git a/6.3.0/gentoo/29_all_arm_armv4t-default.patch b/6.3.0/gentoo/29_all_arm_armv4t-default.patch
new file mode 100644
index 0000000..4616cf9
--- /dev/null
+++ b/6.3.0/gentoo/29_all_arm_armv4t-default.patch
@@ -0,0 +1,16 @@
+gcc defaults to armv5t for all targets even armv4t
+
+http://sourceware.org/ml/crossgcc/2008-05/msg00009.html
+
+
+--- a/gcc/config/arm/linux-eabi.h
++++ b/gcc/config/arm/linux-eabi.h
+@@ -45,7 +45,7 @@
+    The ARM10TDMI core is the default for armv5t, so set
+    SUBTARGET_CPU_DEFAULT to achieve this.  */
+ #undef  SUBTARGET_CPU_DEFAULT
+-#define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm10tdmi
++#define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm9tdmi
+ 
+ /* TARGET_BIG_ENDIAN_DEFAULT is set in
+    config.gcc for big endian configurations.  */
diff --git a/6.3.0/gentoo/34_all_ia64_note.GNU-stack.patch b/6.3.0/gentoo/34_all_ia64_note.GNU-stack.patch
new file mode 100644
index 0000000..66a787e
--- /dev/null
+++ b/6.3.0/gentoo/34_all_ia64_note.GNU-stack.patch
@@ -0,0 +1,92 @@
+http://gcc.gnu.org/PR21098
+
+
+2004-09-20  Jakub Jelinek  <jakub@redhat.com>
+
+	* config/rs6000/ppc-asm.h: Add .note.GNU-stack section also
+	on ppc64-linux.
+
+	* config/ia64/lib1funcs.asm: Add .note.GNU-stack section on
+	ia64-linux.
+	* config/ia64/crtbegin.asm: Likewise.
+	* config/ia64/crtend.asm: Likewise.
+	* config/ia64/crti.asm: Likewise.
+	* config/ia64/crtn.asm: Likewise.
+
+2004-05-14  Jakub Jelinek  <jakub@redhat.com>
+
+	* config/ia64/linux.h (TARGET_ASM_FILE_END): Define.
+
+
+--- a/gcc/config/ia64/linux.h
++++ b/gcc/config/ia64/linux.h
+@@ -24,6 +24,8 @@ a copy of the GCC Runtime Library Exception along with this program;
+ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+ <http://www.gnu.org/licenses/>.  */
+ 
++#define TARGET_ASM_FILE_END file_end_indicate_exec_stack
++
+ /* This is for -profile to use -lc_p instead of -lc.  */
+ #undef CC1_SPEC
+ #define CC1_SPEC "%{profile:-p} %{G*}"
+--- a/gcc/config/rs6000/ppc-asm.h
++++ b/gcc/config/rs6000/ppc-asm.h
+@@ -352,7 +352,7 @@ GLUE(.L,name): \
+ #endif
+ #endif
+ 
+-#if defined __linux__ && !defined __powerpc64__
++#if defined __linux__
+ 	.section .note.GNU-stack
+ 	.previous
+ #endif
+--- a/libgcc/config/ia64/crtbegin.S
++++ b/libgcc/config/ia64/crtbegin.S
+@@ -252,3 +252,7 @@ __do_jv_register_classes:
+ .weak __cxa_finalize
+ #endif
+ .weak _Jv_RegisterClasses
++
++#ifdef __linux__
++.section .note.GNU-stack; .previous
++#endif
+--- a/libgcc/config/ia64/crtend.S
++++ b/libgcc/config/ia64/crtend.S
+@@ -119,3 +119,6 @@ __do_global_ctors_aux:
+ 
+ 	br.ret.sptk.many rp
+ 	.endp __do_global_ctors_aux
++#ifdef __linux__
++.section .note.GNU-stack; .previous
++#endif
+--- a/libgcc/config/ia64/crti.S
++++ b/libgcc/config/ia64/crti.S
+@@ -49,5 +49,8 @@ _fini:
+ 	.save rp, r33
+ 	mov	r33 = b0
+ 	.body
++#ifdef __linux__
++.section .note.GNU-stack; .previous
++#endif
+ 
+ # end of crti.S
+--- a/libgcc/config/ia64/crtn.S
++++ b/libgcc/config/ia64/crtn.S
+@@ -39,5 +39,8 @@
+ 	.restore sp
+ 	mov	r12 = r35
+ 	br.ret.sptk.many b0
++#ifdef __linux__
++.section .note.GNU-stack; .previous
++#endif
+ 
+ # end of crtn.S
+--- a/libgcc/config/ia64/lib1funcs.S
++++ b/libgcc/config/ia64/lib1funcs.S
+@@ -793,3 +793,6 @@ __floattitf:
+ 	.endp __floattitf
+ #endif
+ #endif
++#ifdef __linux__
++.section .note.GNU-stack; .previous
++#endif
diff --git a/6.3.0/gentoo/42_all_superh_default-multilib.patch b/6.3.0/gentoo/42_all_superh_default-multilib.patch
new file mode 100644
index 0000000..8b638d9
--- /dev/null
+++ b/6.3.0/gentoo/42_all_superh_default-multilib.patch
@@ -0,0 +1,24 @@
+The gcc-3.x toolchains would contain all the targets by default.  With gcc-4,
+you have to actually list out the multilibs you want or you will end up with
+just one when using targets like 'sh4-linux-gnu'.
+
+The resulting toolchain can't even build a kernel as the kernel needs to build
+with the nofpu flag to be sure that no fpu ops are generated.
+
+Here we restore the gcc-3.x behavior; the additional overhead of building all
+of these multilibs by default is negligible.
+
+https://bugs.gentoo.org/140205
+https://bugs.gentoo.org/320251
+
+--- a/gcc/config.gcc
++++ b/gcc/config.gcc
+@@ -2455,7 +2455,7 @@ sh-*-symbianelf* | sh[12346l]*-*-symbianelf* | \
+ 	if test "$sh_multilibs" = "default" ; then
+ 		case ${target} in
+ 		sh64-superh-linux* | \
+-		sh[1234]*)	sh_multilibs=${sh_cpu_target} ;;
++		sh[1234]*)	sh_multilibs=$(echo $(sed -n '/^[[:space:]]*case ${sh_multilib} in/,/)/{s:case ${sh_multilib} in::;s: | *:,:g;s:[\\)]::g;p}' ${srcdir}/config.gcc) | sed 's: ::g') ;;
+ 		sh64* | sh5*)	sh_multilibs=m5-32media,m5-32media-nofpu,m5-compact,m5-compact-nofpu,m5-64media,m5-64media-nofpu ;;
+ 		sh-superh-*)	sh_multilibs=m4,m4-single,m4-single-only,m4-nofpu ;;
+ 		sh*-*-linux*)	sh_multilibs=m1,m3e,m4 ;;
diff --git a/6.3.0/gentoo/50_all_libiberty-asprintf.patch b/6.3.0/gentoo/50_all_libiberty-asprintf.patch
new file mode 100644
index 0000000..bee0c4c
--- /dev/null
+++ b/6.3.0/gentoo/50_all_libiberty-asprintf.patch
@@ -0,0 +1,18 @@
+2008-07-25  Magnus Granberg  <zorry@ume.nu>
+
+	* include/libiberty.h (asprintf): Don't declare if defined as a macro
+
+--- a/include/libiberty.h
++++ b/include/libiberty.h
+@@ -609,8 +609,11 @@ extern int pwait (int, int *, int);
+ /* Like sprintf but provides a pointer to malloc'd storage, which must
+    be freed by the caller.  */
+ 
++/* asprintf may be declared as a macro by glibc with __USE_FORTIFY_LEVEL.  */
++#ifndef asprintf
+ extern int asprintf (char **, const char *, ...) ATTRIBUTE_PRINTF_2;
+ #endif
++#endif
+ 
+ #if !HAVE_DECL_VASPRINTF
+ /* Like vsprintf but provides a pointer to malloc'd storage, which
diff --git a/6.3.0/gentoo/51_all_libiberty-pic.patch b/6.3.0/gentoo/51_all_libiberty-pic.patch
new file mode 100644
index 0000000..b6160a7
--- /dev/null
+++ b/6.3.0/gentoo/51_all_libiberty-pic.patch
@@ -0,0 +1,10 @@
+--- a/libiberty/Makefile.in
++++ b/libiberty/Makefile.in
+@@ -246,6 +246,7 @@ $(TARGETLIB): $(REQUIRED_OFILES) $(EXTRA_OFILES) $(LIBOBJS)
+ 	  $(AR) $(AR_FLAGS) $(TARGETLIB) \
+ 	    $(REQUIRED_OFILES) $(EXTRA_OFILES) $(LIBOBJS); \
+ 	  $(RANLIB) $(TARGETLIB); \
++	  cp $(TARGETLIB) ../ ; \
+ 	  cd ..; \
+ 	else true; fi
+ 
diff --git a/6.3.0/gentoo/54_all_nopie-all-flags.patch b/6.3.0/gentoo/54_all_nopie-all-flags.patch
new file mode 100644
index 0000000..48536e6
--- /dev/null
+++ b/6.3.0/gentoo/54_all_nopie-all-flags.patch
@@ -0,0 +1,18 @@
+We need to pass NO_PIE_CFLAGS to ALL_* so gcc don't fail when
+we compile it with older gcc and pie.
+
+--- a/gcc/Makefile.in	2015-06-25 19:18:12.000000000 +0200
++++ b/gcc/Makefile.in	2016-04-22 00:12:54.029178860 +0200
+@@ -991,10 +991,10 @@ ALL_CXXFLAGS = $(T_CFLAGS) $(CFLAGS-$@)
+ ALL_CPPFLAGS = $(INCLUDES) $(CPPFLAGS)
+ 
+ # This is the variable to use when using $(COMPILER).
+-ALL_COMPILERFLAGS = $(ALL_CXXFLAGS)
++ALL_COMPILERFLAGS = $(NO_PIE_CFLAGS) $(ALL_CXXFLAGS)
+ 
+ # This is the variable to use when using $(LINKER).
+-ALL_LINKERFLAGS = $(ALL_CXXFLAGS)
++ALL_LINKERFLAGS = $(NO_PIE_CFLAGS) $(ALL_CXXFLAGS)
+ 
+ # Build and host support libraries.
+ 
diff --git a/6.3.0/gentoo/55_all_extra-options.patch b/6.3.0/gentoo/55_all_extra-options.patch
new file mode 100644
index 0000000..ff14c10
--- /dev/null
+++ b/6.3.0/gentoo/55_all_extra-options.patch
@@ -0,0 +1,87 @@
+On Hardened we add or remove some options like -fstack-check,
+-fstack-protector-all, -fstrict_overflow and -z now
+
+--- a/libgcc/Makefile.in	2011-11-22 04:01:02.000000000 +0100
++++ b/libgcc/Makefile.in	2011-12-25 15:18:22.449610631 +0100
+@@ -225,7 +225,7 @@ endif
+ LIBGCC2_DEBUG_CFLAGS = -g
+ LIBGCC2_CFLAGS = -O2 $(LIBGCC2_INCLUDES) $(GCC_CFLAGS) $(HOST_LIBGCC2_CFLAGS) \
+ 		 $(LIBGCC2_DEBUG_CFLAGS) -DIN_LIBGCC2 \
+-		 -fbuilding-libgcc -fno-stack-protector \
++		 -fbuilding-libgcc -fno-stack-protector -fstack-check=no \
+ 		 $(INHIBIT_LIBC_CFLAGS)
+ 
+ # Additional options to use when compiling libgcc2.a.
+@@ -279,7 +290,7 @@ INTERNAL_CFLAGS = $(CFLAGS) $(LIBGCC2_CF
+   -finhibit-size-directive -fno-inline -fno-exceptions \
+   -fno-zero-initialized-in-bss -fno-toplevel-reorder -fno-tree-vectorize \
+   -fbuilding-libgcc -fno-stack-protector $(FORCE_EXPLICIT_EH_REGISTRY) \
+-  $(INHIBIT_LIBC_CFLAGS)
++  -fstack-check=no $(INHIBIT_LIBC_CFLAGS)
+ 
+ # Extra flags to use when compiling crt{begin,end}.o.
+ CRTSTUFF_T_CFLAGS =
+--- a/gcc/defaults.h	2016-01-04 15:30:50.000000000 +0100
++++ b/gcc/defaults.h	2016-05-02 22:23:43.815707806 +0200
+@@ -1398,8 +1398,12 @@ see the files COPYING3 and COPYING.RUNTI
+ /* Default value for flag_stack_protect when flag_stack_protect is initialized to -1:
+    --enable-default-ssp: Default flag_stack_protect to -fstack-protector-strong.
+    --disable-default-ssp: Default flag_stack_protect to 0.
++   Hardened: Default flag_stack_protect to -fstack-protector-all.
+  */
+ #ifdef ENABLE_DEFAULT_SSP
++# ifdef EXTRA_OPTIONS
++#  define DEFAULT_FLAG_SSP 2
++# endif
+ # ifndef DEFAULT_FLAG_SSP
+ #  define DEFAULT_FLAG_SSP 3
+ # endif
+--- a/gcc/gcc.c	2016-02-19 23:18:38.000000000 +0100
++++ b/gcc/gcc.c	2016-05-02 22:56:10.185721270 +0200
+@@ -868,6 +868,13 @@ proper position among the other output f
+ #endif
+ #endif
+ 
++#define STACK_CHECK_SPEC "%{fstack-check|fstack-check=*:;: -fstack-check} "
++#ifdef EXTRA_OPTIONS
++#define LINK_NOW_SPEC "%{!nonow:-z now} "
++#else
++#define LINK_NOW_SPEC ""
++#endif
++
+ #ifdef ENABLE_DEFAULT_PIE
+ #define NO_PIE_SPEC		"no-pie|static"
+ #define PIE_SPEC		NO_PIE_SPEC "|r|shared:;"
+@@ -1013,7 +1020,7 @@ proper position among the other output f
+     %(linker) " \
+     LINK_PLUGIN_SPEC \
+    "%{flto|flto=*:%<fcompare-debug*} \
+-    %{flto} %{fno-lto} %{flto=*} %l " LINK_PIE_SPEC \
++    %{flto} %{fno-lto} %{flto=*} %l " LINK_PIE_SPEC LINK_NOW_SPEC \
+    "%{fuse-ld=*:-fuse-ld=%*} " LINK_COMPRESS_DEBUG_SPEC \
+    "%X %{o*} %{e*} %{N} %{n} %{r}\
+     %{s} %{t} %{u*} %{z} %{Z} %{!nostdlib:%{!nostartfiles:%S}} \
+@@ -1052,7 +1059,11 @@ proper position among the other output f
+ 
+ static const char *asm_debug = ASM_DEBUG_SPEC;
+ static const char *cpp_spec = CPP_SPEC;
++#ifdef EXTRA_OPTIONS
++static const char *cc1_spec = CC1_SPEC STACK_CHECK_SPEC;
++#else
+ static const char *cc1_spec = CC1_SPEC;
++#endif
+ static const char *cc1plus_spec = CC1PLUS_SPEC;
+ static const char *link_gcc_c_sequence_spec = LINK_GCC_C_SEQUENCE_SPEC;
+ static const char *link_ssp_spec = LINK_SSP_SPEC;
+--- a/gcc/opts.c	2016-03-17 16:11:35.000000000 +0100
++++ b/gcc/opts.c	2016-04-27 16:48:59.952580580 +0200
+@@ -495,7 +495,9 @@ static const struct default_options defa
+     { OPT_LEVELS_2_PLUS, OPT_fschedule_insns2, NULL, 1 },
+ #endif
+     { OPT_LEVELS_2_PLUS, OPT_fstrict_aliasing, NULL, 1 },
++#ifndef EXTRA_OPTIONS
+     { OPT_LEVELS_2_PLUS, OPT_fstrict_overflow, NULL, 1 },
++#endif
+     { OPT_LEVELS_2_PLUS_SPEED_ONLY, OPT_freorder_blocks_algorithm_, NULL,
+       REORDER_BLOCKS_ALGORITHM_STC },
+     { OPT_LEVELS_2_PLUS, OPT_freorder_functions, NULL, 1 },
diff --git a/6.3.0/gentoo/90_all_pr55930-dependency-tracking.patch b/6.3.0/gentoo/90_all_pr55930-dependency-tracking.patch
new file mode 100644
index 0000000..a8743e0
--- /dev/null
+++ b/6.3.0/gentoo/90_all_pr55930-dependency-tracking.patch
@@ -0,0 +1,18 @@
+libatomic build failure if configured with --disable-dependency-tracking
+load_n.c:115:1: fatal error: opening dependency file .deps/load_1_.lo.Ppo: No such file or directory
+
+https://bugs.gentoo.org/463463
+http://gcc.gnu.org/PR55930
+
+--- a/libatomic/Makefile.in
++++ b/libatomic/Makefile.in
+@@ -298,7 +298,8 @@ PAT_N = $(word 2,$(PAT_SPLIT))
+ PAT_S = $(word 3,$(PAT_SPLIT))
+ IFUNC_DEF = -DIFUNC_ALT=$(PAT_S)
+ IFUNC_OPT = $(word $(PAT_S),$(IFUNC_OPTIONS))
+-M_DEPS = -MT $@ -MD -MP -MF $(DEPDIR)/$(@F).Ppo
++@AMDEP_TRUE@M_DEPS = -MT $@ -MD -MP -MF $(DEPDIR)/$(@F).Ppo
++@AMDEP_FALSE@M_DEPS =
+ M_SIZE = -DN=$(PAT_N)
+ M_IFUNC = $(if $(PAT_S),$(IFUNC_DEF) $(IFUNC_OPT))
+ M_FILE = $(PAT_BASE)_n.c
diff --git a/6.3.0/gentoo/README.history b/6.3.0/gentoo/README.history
new file mode 100644
index 0000000..f55d7d7
--- /dev/null
+++ b/6.3.0/gentoo/README.history
@@ -0,0 +1,14 @@
+1.0		24 Dec 2016
+	+ 10_all_default-fortify-source.patch
+	+ 11_all_default-warn-format-security.patch
+	+ 12_all_default-warn-trampolines.patch
+	+ 13_all_default-ssp-fix.patch
+	+ 25_all_alpha-mieee-default.patch
+	+ 29_all_arm_armv4t-default.patch
+	+ 34_all_ia64_note.GNU-stack.patch
+	+ 42_all_superh_default-multilib.patch
+	+ 50_all_libiberty-asprintf.patch
+	+ 51_all_libiberty-pic.patch
+	+ 54_all_nopie-all-flags.patch
+	+ 55_all_extra-options.patch
+	+ 90_all_pr55930-dependency-tracking.patch