legacy/gcc6: add buildable patches

44 files changed, 3123 insertions, 0 deletions

diff --git a/legacy/gcc6/001_all_default-ssp-strong.patch b/legacy/gcc6/001_all_default-ssp-strong.patch
new file mode 100644
index 000000000..95949eb00
--- /dev/null
+++ b/legacy/gcc6/001_all_default-ssp-strong.patch
@@ -0,0 +1,215 @@
+# DP: Turn on -fstack-protector by default for C, C++, ObjC, ObjC++.
+# DP: Build libgcc using -fno-stack-protector.
+
+---
+ gcc/Makefile.in        |    2 ++
+ gcc/cp/lang-specs.h    |    6 +++---
+ gcc/doc/invoke.texi    |    4 ++++
+ gcc/gcc.c              |   18 ++++++++++++++----
+ gcc/objc/lang-specs.h  |   10 +++++-----
+ gcc/objcp/lang-specs.h |    8 ++++----
+ 6 files changed, 32 insertions(+), 16 deletions(-)
+
+Index: b/gcc/gcc.c
+===================================================================
+--- a/gcc/gcc.c
++++ b/gcc/gcc.c
+@@ -858,6 +858,14 @@ proper position among the other output f
+ #define LINK_GCC_C_SEQUENCE_SPEC "%G %L %G"
+ #endif
+ 
++#ifndef SSP_DEFAULT_SPEC
++#ifdef TARGET_LIBC_PROVIDES_SSP
++#define SSP_DEFAULT_SPEC "%{!fno-stack-protector:%{!fstack-protector-all:%{!ffreestanding:%{!nostdlib:%{!fstack-protector:-fstack-protector-strong}}}}}"
++#else
++#define SSP_DEFAULT_SPEC ""
++#endif
++#endif
++
+ #ifndef LINK_SSP_SPEC
+ #ifdef TARGET_LIBC_PROVIDES_SSP
+ #define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all" \
+@@ -1057,6 +1065,7 @@ static const char *cc1_spec = CC1_SPEC;
+ 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;
++static const char *ssp_default_spec = SSP_DEFAULT_SPEC;
+ static const char *asm_spec = ASM_SPEC;
+ static const char *asm_final_spec = ASM_FINAL_SPEC;
+ static const char *link_spec = LINK_SPEC;
+@@ -1112,7 +1121,7 @@ static const char *cpp_unique_options =
+ static const char *cpp_options =
+ "%(cpp_unique_options) %1 %{m*} %{std*&ansi&trigraphs} %{W*&pedantic*} %{w}\
+  %{f*} %{g*:%{!g0:%{g*} %{!fno-working-directory:-fworking-directory}}} %{O*}\
+- %{undef} %{save-temps*:-fpch-preprocess}";
++ %{undef} %{save-temps*:-fpch-preprocess} %(ssp_default)";
+ 
+ /* This contains cpp options which are not passed when the preprocessor
+    output will be used by another program.  */
+@@ -1301,9 +1310,9 @@ static const struct compiler default_com
+       %{save-temps*|traditional-cpp|no-integrated-cpp:%(trad_capable_cpp) \
+ 	  %(cpp_options) -o %{save-temps*:%b.i} %{!save-temps*:%g.i} \n\
+ 	    cc1 -fpreprocessed %{save-temps*:%b.i} %{!save-temps*:%g.i} \
+-	  %(cc1_options)}\
++	  %(cc1_options) %(ssp_default)}\
+       %{!save-temps*:%{!traditional-cpp:%{!no-integrated-cpp:\
+-	  cc1 %(cpp_unique_options) %(cc1_options)}}}\
++	  cc1 %(cpp_unique_options) %(cc1_options) %(ssp_default)}}}\
+       %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 1},
+   {"-",
+    "%{!E:%e-E or -x required when input is from standard input}\
+@@ -1328,7 +1337,7 @@ static const struct compiler default_com
+ 					   %W{o*:--output-pch=%*}}%V}}}}}}}", 0, 0, 0},
+   {".i", "@cpp-output", 0, 0, 0},
+   {"@cpp-output",
+-   "%{!M:%{!MM:%{!E:cc1 -fpreprocessed %i %(cc1_options) %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
++   "%{!M:%{!MM:%{!E:cc1 -fpreprocessed %i %(cc1_options) %(ssp_default) %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
+   {".s", "@assembler", 0, 0, 0},
+   {"@assembler",
+    "%{!M:%{!MM:%{!E:%{!S:as %(asm_debug) %(asm_options) %i %A }}}}", 0, 0, 0},
+@@ -1560,6 +1569,7 @@ static struct spec_list static_specs[] =
+   INIT_STATIC_SPEC ("cc1plus",			&cc1plus_spec),
+   INIT_STATIC_SPEC ("link_gcc_c_sequence",	&link_gcc_c_sequence_spec),
+   INIT_STATIC_SPEC ("link_ssp",			&link_ssp_spec),
++  INIT_STATIC_SPEC ("ssp_default",		&ssp_default_spec),
+   INIT_STATIC_SPEC ("endfile",			&endfile_spec),
+   INIT_STATIC_SPEC ("link",			&link_spec),
+   INIT_STATIC_SPEC ("lib",			&lib_spec),
+Index: b/gcc/cp/lang-specs.h
+===================================================================
+--- a/gcc/cp/lang-specs.h
++++ b/gcc/cp/lang-specs.h
+@@ -46,7 +46,7 @@ along with GCC; see the file COPYING3.
+ 		%(cpp_options) %2 -o %{save-temps*:%b.ii} %{!save-temps*:%g.ii} \n}\
+       cc1plus %{save-temps*|no-integrated-cpp:-fpreprocessed %{save-temps*:%b.ii} %{!save-temps*:%g.ii}}\
+ 	      %{!save-temps*:%{!no-integrated-cpp:%(cpp_unique_options)}}\
+-	%(cc1_options) %2\
++	%(cc1_options) %(ssp_default) %2\
+ 	%{!fsyntax-only:-o %g.s \
+ 	    %{!fdump-ada-spec*:%{!o*:--output-pch=%i.gch}\
+ 			       %W{o*:--output-pch=%*}}%V}}}}",
+@@ -58,11 +58,11 @@ along with GCC; see the file COPYING3.
+ 		%(cpp_options) %2 -o %{save-temps*:%b.ii} %{!save-temps*:%g.ii} \n}\
+       cc1plus %{save-temps*|no-integrated-cpp:-fpreprocessed %{save-temps*:%b.ii} %{!save-temps*:%g.ii}}\
+ 	      %{!save-temps*:%{!no-integrated-cpp:%(cpp_unique_options)}}\
+-	%(cc1_options) %2\
++	%(cc1_options) %(ssp_default) %2\
+        %{!fsyntax-only:%(invoke_as)}}}}",
+      CPLUSPLUS_CPP_SPEC, 0, 0},
+   {".ii", "@c++-cpp-output", 0, 0, 0},
+   {"@c++-cpp-output",
+    "%{!M:%{!MM:%{!E:\
+-    cc1plus -fpreprocessed %i %(cc1_options) %2\
++    cc1plus -fpreprocessed %i %(cc1_options) %(ssp_default) %2\
+     %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
+Index: b/gcc/params.def
+===================================================================
+--- a/gcc/params.def
++++ b/gcc/params.def
+@@ -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",
+Index: b/gcc/objc/lang-specs.h
+===================================================================
+--- a/gcc/objc/lang-specs.h
++++ b/gcc/objc/lang-specs.h
+@@ -29,9 +29,9 @@ along with GCC; see the file COPYING3.
+ 	%{traditional|traditional-cpp:\
+ %eGNU Objective C no longer supports traditional compilation}\
+ 	%{save-temps*|no-integrated-cpp:cc1obj -E %(cpp_options) -o %{save-temps*:%b.mi} %{!save-temps*:%g.mi} \n\
+-	    cc1obj -fpreprocessed %{save-temps*:%b.mi} %{!save-temps*:%g.mi} %(cc1_options) %{print-objc-runtime-info} %{gen-decls}}\
++	    cc1obj -fpreprocessed %{save-temps*:%b.mi} %{!save-temps*:%g.mi} %(cc1_options) %(ssp_default) %{print-objc-runtime-info} %{gen-decls}}\
+ 	%{!save-temps*:%{!no-integrated-cpp:\
+-	    cc1obj %(cpp_unique_options) %(cc1_options) %{print-objc-runtime-info} %{gen-decls}}}\
++	    cc1obj %(cpp_unique_options) %(cc1_options) %(ssp_default) %{print-objc-runtime-info} %{gen-decls}}}\
+         %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
+   {"@objective-c-header",
+      "%{E|M|MM:cc1obj -E %{traditional|traditional-cpp:-traditional-cpp}\
+@@ -40,18 +40,18 @@ along with GCC; see the file COPYING3.
+ 	%{traditional|traditional-cpp:\
+ %eGNU Objective C no longer supports traditional compilation}\
+ 	%{save-temps*|no-integrated-cpp:cc1obj -E %(cpp_options) -o %{save-temps*:%b.mi} %{!save-temps*:%g.mi} \n\
+-	    cc1obj -fpreprocessed %b.mi %(cc1_options) %{print-objc-runtime-info} %{gen-decls}\
++	    cc1obj -fpreprocessed %b.mi %(cc1_options) %(ssp_default) %{print-objc-runtime-info} %{gen-decls}\
+                         -o %g.s %{!o*:--output-pch=%i.gch}\
+                         %W{o*:--output-pch=%*}%V}\
+ 	%{!save-temps*:%{!no-integrated-cpp:\
+-	    cc1obj %(cpp_unique_options) %(cc1_options) %{print-objc-runtime-info} %{gen-decls}\
++	    cc1obj %(cpp_unique_options) %(cc1_options) %(ssp_default) %{print-objc-runtime-info} %{gen-decls}\
+                         -o %g.s %{!o*:--output-pch=%i.gch}\
+                         %W{o*:--output-pch=%*}%V}}}}}", 0, 0, 0},
+   {".mi", "@objective-c-cpp-output", 0, 0, 0},
+   {"@objective-c-cpp-output",
+-     "%{!M:%{!MM:%{!E:cc1obj -fpreprocessed %i %(cc1_options) %{print-objc-runtime-info} %{gen-decls}\
++     "%{!M:%{!MM:%{!E:cc1obj -fpreprocessed %i %(cc1_options) %(ssp_default) %{print-objc-runtime-info} %{gen-decls}\
+ 			     %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
+   {"@objc-cpp-output",
+       "%nobjc-cpp-output is deprecated; please use objective-c-cpp-output instead\n\
+-       %{!M:%{!MM:%{!E:cc1obj -fpreprocessed %i %(cc1_options) %{print-objc-runtime-info} %{gen-decls}\
++       %{!M:%{!MM:%{!E:cc1obj -fpreprocessed %i %(cc1_options) %(ssp_default) %{print-objc-runtime-info} %{gen-decls}\
+ 			     %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
+Index: b/gcc/objcp/lang-specs.h
+===================================================================
+--- a/gcc/objcp/lang-specs.h
++++ b/gcc/objcp/lang-specs.h
+@@ -36,7 +36,7 @@ along with GCC; see the file COPYING3.
+ 		%(cpp_options) %2 -o %{save-temps*:%b.mii} %{!save-temps*:%g.mii} \n}\
+       cc1objplus %{save-temps*|no-integrated-cpp:-fpreprocessed %{save-temps*:%b.mii} %{!save-temps*:%g.mii}}\
+ 	      %{!save-temps*:%{!no-integrated-cpp:%(cpp_unique_options)}}\
+-	%(cc1_options) %2\
++	%(cc1_options) %(ssp_default) %2\
+         -o %g.s %{!o*:--output-pch=%i.gch} %W{o*:--output-pch=%*}%V}}}",
+      CPLUSPLUS_CPP_SPEC, 0, 0},
+   {"@objective-c++",
+@@ -46,16 +46,16 @@ along with GCC; see the file COPYING3.
+ 		%(cpp_options) %2 -o %{save-temps*:%b.mii} %{!save-temps*:%g.mii} \n}\
+       cc1objplus %{save-temps*|no-integrated-cpp:-fpreprocessed %{save-temps*:%b.mii} %{!save-temps*:%g.mii}}\
+ 	      %{!save-temps*:%{!no-integrated-cpp:%(cpp_unique_options)}}\
+-	%(cc1_options) %2\
++	%(cc1_options) %(ssp_default) %2\
+        %{!fsyntax-only:%(invoke_as)}}}}",
+      CPLUSPLUS_CPP_SPEC, 0, 0},
+   {".mii", "@objective-c++-cpp-output", 0, 0, 0},
+   {"@objective-c++-cpp-output",
+    "%{!M:%{!MM:%{!E:\
+-    cc1objplus -fpreprocessed %i %(cc1_options) %2\
++    cc1objplus -fpreprocessed %i %(cc1_options) %(ssp_default) %2\
+     %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
+   {"@objc++-cpp-output",
+    "%nobjc++-cpp-output is deprecated; please use objective-c++-cpp-output instead\n\
+     %{!M:%{!MM:%{!E:\
+-    cc1objplus -fpreprocessed %i %(cc1_options) %2\
++    cc1objplus -fpreprocessed %i %(cc1_options) %(ssp_default) %2\
+     %{!fsyntax-only:%(invoke_as)}}}}", 0, 0, 0},
+Index: b/gcc/doc/invoke.texi
+===================================================================
+--- a/gcc/doc/invoke.texi
++++ b/gcc/doc/invoke.texi
+@@ -9247,6 +9247,9 @@
+ The minimum size of variables taking part in stack slot sharing when not
+ optimizing. The default value is 32.
+ 
++The Alpine Linux default is "4", to increase
++the number of functions protected by the stack protector.
++
+ @item max-jump-thread-duplication-stmts
+ Maximum number of statements allowed in a block that needs to be
+ duplicated when threading jumps.
+@@ -10185,6 +10188,11 @@
+ Like @option{-fstack-protector} but includes additional functions to
+ be protected --- those that have local array definitions, or have
+ references to local frame addresses.
++
++NOTE: In Alpine Linux,
++@option{-fstack-protector-strong} is enabled by default for C,
++C++, ObjC, ObjC++, if none of @option{-fno-stack-protector},
++@option{-nostdlib}, nor @option{-ffreestanding} are found.
+ 
+ @item -fstack-protector-explicit
+ @opindex fstack-protector-explicit
diff --git a/legacy/gcc6/002_all_default-relro.patch b/legacy/gcc6/002_all_default-relro.patch
new file mode 100644
index 000000000..c461017dc
--- /dev/null
+++ b/legacy/gcc6/002_all_default-relro.patch
@@ -0,0 +1,33 @@
+# Turn on -Wl,-z,relro,-z,now by default.
+
+---
+ gcc/doc/invoke.texi |    3 +++
+ gcc/gcc.c           |    1 +
+ 2 files changed, 4 insertions(+), 0 deletions(-)
+
+Index: b/gcc/doc/invoke.texi
+===================================================================
+--- a/gcc/doc/invoke.texi
++++ b/gcc/doc/invoke.texi
+@@ -11424,6 +11424,9 @@ For example, @option{-Wl,-Map,output.map
+ linker.  When using the GNU linker, you can also get the same effect with
+ @option{-Wl,-Map=output.map}.
+ 
++NOTE: In Alpine Linux, for LDFLAGS, the option
++@option{-Wl,-z,relro,now} is used.  To disable, use @option{-Wl,-z,norelro}.
++
+ @item -u @var{symbol}
+ @opindex u
+ Pretend the symbol @var{symbol} is undefined, to force linking of
+Index: b/gcc/gcc.c
+===================================================================
+--- a/gcc/gcc.c
++++ b/gcc/gcc.c
+@@ -890,6 +890,7 @@ proper position among the other output f
+    "%{flto|flto=*:%<fcompare-debug*} \
+     %{flto} %{fno-lto} %{flto=*} %l " LINK_PIE_SPEC \
+    "%{fuse-ld=*:-fuse-ld=%*} " LINK_COMPRESS_DEBUG_SPEC \
++   "-z relro -z now " \
+    "%X %{o*} %{e*} %{N} %{n} %{r}\
+     %{s} %{t} %{u*} %{z} %{Z} %{!nostdlib:%{!nostartfiles:%S}} " VTABLE_VERIFICATION_SPEC " \
+     %{static:} %{L*} %(mfwrap) %(link_libgcc) " SANITIZER_EARLY_SPEC " %o\
diff --git a/legacy/gcc6/003_all_default-fortify-source.patch b/legacy/gcc6/003_all_default-fortify-source.patch
new file mode 100644
index 000000000..6ca803343
--- /dev/null
+++ b/legacy/gcc6/003_all_default-fortify-source.patch
@@ -0,0 +1,40 @@
+# DP: Turn on -D_FORTIFY_SOURCE=2 by default for C, C++, ObjC, ObjC++,
+# DP: if the optimization level is > 0
+
+---
+ gcc/doc/invoke.texi          |    6 ++++++
+ gcc/c-family/c-cppbuiltin.c  |    3 +
+ 2 files changed, 9 insertions(+), 0 deletions(-)
+
+Index: b/gcc/doc/invoke.texi
+===================================================================
+--- a/gcc/doc/invoke.texi
++++ b/gcc/doc/invoke.texi
+@@ -7840,6 +7840,12 @@ also turns on the following optimization
+ Please note the warning under @option{-fgcse} about
+ invoking @option{-O2} on programs that use computed gotos.
+ 
++NOTE: In Alpine Linux, @option{-D_FORTIFY_SOURCE=2} is
++set by default, and is activated when @option{-O} is set to 2 or higher.
++This enables additional compile-time and run-time checks for several libc
++functions.  To disable, specify either @option{-U_FORTIFY_SOURCE} or
++@option{-D_FORTIFY_SOURCE=0}.
++
+ @item -O3
+ @opindex O3
+ Optimize yet more.  @option{-O3} turns on all optimizations specified
+Index: b/gcc/c-family/c-cppbuiltin.c
+===================================================================
+--- a/gcc/c-family/c-cppbuiltin.c
++++ b/gcc/c-family/c-cppbuiltin.c
+@@ -1176,6 +1176,10 @@ 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 for optimization levels > 0 */
++  if (optimize)
++    builtin_define_with_int_value ("_FORTIFY_SOURCE", 2);
++
+   /* Misc.  */
+   if (flag_gnu89_inline)
+     cpp_define (pfile, "__GNUC_GNU_INLINE__");
diff --git a/legacy/gcc6/005_all_default-as-needed.patch b/legacy/gcc6/005_all_default-as-needed.patch
new file mode 100644
index 000000000..ee4f7962a
--- /dev/null
+++ b/legacy/gcc6/005_all_default-as-needed.patch
@@ -0,0 +1,241 @@
+# DP: On linux targets pass --as-needed by default to the linker, but always
+# DP: link the sanitizer libraries with --no-as-needed.
+
+--- a/gcc/gcc.c
++++ b/gcc/gcc.c
+@@ -568,8 +568,11 @@ proper position among the other output f
+ #ifdef LIBTSAN_EARLY_SPEC
+ #define LIBTSAN_SPEC STATIC_LIBTSAN_LIBS
+ #elif defined(HAVE_LD_STATIC_DYNAMIC)
+-#define LIBTSAN_SPEC "%{static-libtsan:" LD_STATIC_OPTION \
+-		     "} -ltsan %{static-libtsan:" LD_DYNAMIC_OPTION "}" \
++#define LIBTSAN_SPEC "%{static-libtsan:" LD_STATIC_OPTION "}" \
++		     " %{!static-libtsan:%{!fuse-ld=gold:--push-state }--no-as-needed}" \
++		     " -ltsan " \
++		     " %{static-libtsan:" LD_DYNAMIC_OPTION "}" \
++		     " %{!static-libtsan:%{fuse-ld=gold:--as-needed;:--pop-state}}" \
+ 		     STATIC_LIBTSAN_LIBS
+ #else
+ #define LIBTSAN_SPEC "-ltsan" STATIC_LIBTSAN_LIBS
+--- a/gcc/config/gnu-user.h
++++ b/gcc/config/gnu-user.h
+@@ -124,13 +124,13 @@
+ #define LIBASAN_EARLY_SPEC "%{!shared:libasan_preinit%O%s} " \
+   "%{static-libasan:%{!shared:" \
+   LD_STATIC_OPTION " --whole-archive -lasan --no-whole-archive " \
+-  LD_DYNAMIC_OPTION "}}%{!static-libasan:-lasan}"
++  LD_DYNAMIC_OPTION "}}%{!static-libasan:%{!fuse-ld=gold:--push-state} --no-as-needed -lasan %{fuse-ld=gold:--as-needed;:--pop-state}}"
+ #undef LIBTSAN_EARLY_SPEC
+ #define LIBTSAN_EARLY_SPEC "%{static-libtsan:%{!shared:" \
+   LD_STATIC_OPTION " --whole-archive -ltsan --no-whole-archive " \
+-  LD_DYNAMIC_OPTION "}}%{!static-libtsan:-ltsan}"
++  LD_DYNAMIC_OPTION "}}%{!static-libtsan:%{!fuse-ld=gold:--push-state} --no-as-needed -ltsan %{fuse-ld=gold:--as-needed;:--pop-state}}"
+ #undef LIBLSAN_EARLY_SPEC
+ #define LIBLSAN_EARLY_SPEC "%{static-liblsan:%{!shared:" \
+   LD_STATIC_OPTION " --whole-archive -llsan --no-whole-archive " \
+-  LD_DYNAMIC_OPTION "}}%{!static-liblsan:-llsan}"
++  LD_DYNAMIC_OPTION "}}%{!static-liblsan:%{!fuse-ld=gold:--push-state} --no-as-needed -llsan %{fuse-ld=gold:--as-needed;:--pop-state}}"
+ #endif
+Index: b/gcc/config/aarch64/aarch64-linux.h
+===================================================================
+--- a/gcc/config/aarch64/aarch64-linux.h
++++ b/gcc/config/aarch64/aarch64-linux.h
+@@ -36,5 +36,6 @@
+ 
+ #define LINUX_TARGET_LINK_SPEC  "%{h*}		\
++   --as-needed					\
+    %{static:-Bstatic}				\
+    %{shared:-shared}				\
+    %{symbolic:-Bsymbolic}			\
+Index: b/gcc/config/ia64/linux.h
+===================================================================
+--- a/gcc/config/ia64/linux.h
++++ b/gcc/config/ia64/linux.h
+@@ -58,7 +58,7 @@ do {						\
+ #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux-ia64.so.2"
+ 
+ #undef LINK_SPEC
+-#define LINK_SPEC "\
++#define LINK_SPEC " --as-needed \
+   %{shared:-shared} \
+   %{!shared: \
+     %{!static: \
+Index: b/gcc/config/sparc/linux.h
+===================================================================
+--- a/gcc/config/sparc/linux.h
++++ b/gcc/config/sparc/linux.h
+@@ -86,7 +86,7 @@ extern const char *host_detect_local_cpu
+ #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
+ 
+ #undef  LINK_SPEC
+-#define LINK_SPEC "-m elf32_sparc %{shared:-shared} \
++#define LINK_SPEC "-m elf32_sparc --as-needed %{shared:-shared} \
+   %{!mno-relax:%{!r:-relax}} \
+   %{!shared: \
+     %{!static: \
+Index: b/gcc/config/s390/linux.h
+===================================================================
+--- a/gcc/config/s390/linux.h
++++ b/gcc/config/s390/linux.h
+@@ -65,7 +65,7 @@ along with GCC; see the file COPYING3.
+ 
+ #undef  LINK_SPEC
+ #define LINK_SPEC \
+-  "%{m31:-m elf_s390}%{m64:-m elf64_s390} \
++  "%{m31:-m elf_s390}%{m64:-m elf64_s390} --as-needed \
+    %{shared:-shared} \
+    %{!shared: \
+       %{static:-static} \
+Index: b/gcc/config/rs6000/linux64.h
+===================================================================
+--- a/gcc/config/rs6000/linux64.h
++++ b/gcc/config/rs6000/linux64.h
+@@ -466,12 +466,12 @@ extern int dot_symbols;
+ 					   " -m elf64ppc")
+ #endif
+ 
+-#define LINK_OS_LINUX_SPEC32 LINK_OS_LINUX_EMUL32 " %{!shared: %{!static: \
++#define LINK_OS_LINUX_SPEC32 LINK_OS_LINUX_EMUL32 " --as-needed %{!shared: %{!static: \
+   %{rdynamic:-export-dynamic} \
+   -dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "}} \
+   %(link_os_extra_spec32)"
+ 
+-#define LINK_OS_LINUX_SPEC64 LINK_OS_LINUX_EMUL64 " %{!shared: %{!static: \
++#define LINK_OS_LINUX_SPEC64 LINK_OS_LINUX_EMUL64 " --as-needed %{!shared: %{!static: \
+   %{rdynamic:-export-dynamic} \
+   -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "}} \
+   %(link_os_extra_spec64)"
+Index: b/gcc/config/rs6000/sysv4.h
+===================================================================
+--- a/gcc/config/rs6000/sysv4.h
++++ b/gcc/config/rs6000/sysv4.h
+@@ -784,7 +784,7 @@ ENDIAN_SELECT(" -mbig", " -mlittle", DEF
+   CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER, \
+ 			 MUSL_DYNAMIC_LINKER)
+ 
+-#define LINK_OS_LINUX_SPEC "-m elf32ppclinux %{!shared: %{!static: \
++#define LINK_OS_LINUX_SPEC "-m elf32ppclinux --as-needed %{!shared: %{!static: \
+   %{rdynamic:-export-dynamic} \
+   -dynamic-linker " GNU_USER_DYNAMIC_LINKER "}}"
+ 
+Index: b/gcc/config/i386/gnu-user64.h
+===================================================================
+--- a/gcc/config/i386/gnu-user64.h
++++ b/gcc/config/i386/gnu-user64.h
+@@ -57,5 +57,6 @@ see the files COPYING3 and COPYING.RUNTI
+                    %{" SPEC_32 ":-m " GNU_USER_LINK_EMULATION32 "} \
+                    %{" SPEC_X32 ":-m " GNU_USER_LINK_EMULATIONX32 "} \
++  --as-needed \
+   %{shared:-shared} \
+   %{!shared: \
+     %{!static: \
+Index: b/gcc/config/i386/gnu-user.h
+===================================================================
+--- a/gcc/config/i386/gnu-user.h
++++ b/gcc/config/i386/gnu-user.h
+@@ -74,7 +74,7 @@ along with GCC; see the file COPYING3.
+   { "link_emulation", GNU_USER_LINK_EMULATION },\
+   { "dynamic_linker", GNU_USER_DYNAMIC_LINKER }
+ 
+-#define GNU_USER_TARGET_LINK_SPEC "-m %(link_emulation) %{shared:-shared} \
++#define GNU_USER_TARGET_LINK_SPEC "-m %(link_emulation) --as-needed %{shared:-shared} \
+   %{!shared: \
+     %{!static: \
+       %{rdynamic:-export-dynamic} \
+Index: b/gcc/config/alpha/linux-elf.h
+===================================================================
+--- a/gcc/config/alpha/linux-elf.h
++++ b/gcc/config/alpha/linux-elf.h
+@@ -37,7 +37,7 @@ along with GCC; see the file COPYING3.
+ 
+ #define ELF_DYNAMIC_LINKER	GNU_USER_DYNAMIC_LINKER
+ 
+-#define LINK_SPEC "-m elf64alpha %{G*} %{relax:-relax}		\
++#define LINK_SPEC "-m elf64alpha --as-needed %{G*} %{relax:-relax}	\
+   %{O*:-O3} %{!O*:-O1}						\
+   %{shared:-shared}						\
+   %{!shared:							\
+Index: b/gcc/config/arm/linux-elf.h
+===================================================================
+--- a/gcc/config/arm/linux-elf.h
++++ b/gcc/config/arm/linux-elf.h
+@@ -73,5 +73,6 @@
+      %{!shared:-dynamic-linker " GNU_USER_DYNAMIC_LINKER "}} \
+    -X \
++   --as-needed \
+    %{mbig-endian:-EB} %{mlittle-endian:-EL}" \
+    SUBTARGET_EXTRA_LINK_SPEC
+ 
+Index: b/gcc/config/mips/gnu-user.h
+===================================================================
+--- a/gcc/config/mips/gnu-user.h
++++ b/gcc/config/mips/gnu-user.h
+@@ -55,6 +55,7 @@ along with GCC; see the file COPYING3.
+ #undef GNU_USER_TARGET_LINK_SPEC
+ #define GNU_USER_TARGET_LINK_SPEC "\
+   %{G*} %{EB} %{EL} %{mips*} %{shared} \
++ -as-needed \
+   %{!shared: \
+     %{!static: \
+       %{rdynamic:-export-dynamic} \
+Index: b/libjava/Makefile.am
+===================================================================
+--- a/libjava/Makefile.am
++++ b/libjava/Makefile.am
+@@ -627,14 +631,14 @@
+ 	rm .libs/libgcj_bc.so; \
+ 	mv .libs/libgcj_bc.so.1.0.0 .libs/libgcj_bc.so; \
+ 	$(libgcj_bc_dummy_LINK) -xc /dev/null -Wl,-soname,libgcj_bc.so.1 \
+-	-o .libs/libgcj_bc.so.1.0.0 -lgcj || exit; \
++	-o .libs/libgcj_bc.so.1.0.0 -Wl,--no-as-needed -lgcj || exit; \
+ 	rm .libs/libgcj_bc.so.1; \
+ 	$(LN_S) libgcj_bc.so.1.0.0 .libs/libgcj_bc.so.1
+ 
+ ## This rule creates the libgcj_bc library that is actually installed.
+ install/libgcj_bc.la: $(libgcj_bc_la_OBJECTS) $(libgcj_bc_la_DEPENDENCIES) install/$(am__dirstamp)
+ 	$(libgcj_bc_la_LINK) $(am_libgcj_bc_la_rpath) $(libgcj_bc_la_LDFLAGS) \
+-	$(libgcj_bc_la_OBJECTS) $(libgcj_bc_la_LIBADD) $(LIBS)
++	$(libgcj_bc_la_OBJECTS) $(libgcj_bc_la_LIBADD) $(LIBS) -Wl,--no-as-needed -lgcj
+ 
+ ## Note that property_files is defined in sources.am.
+ propertyo_files = $(patsubst classpath/resource/%,%,$(addsuffix .lo,$(property_files)))
+@@ -762,7 +766,7 @@
+ 	rm $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so; \
+ 	mv $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so.1.0.0 $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so; \
+ 	$(libgcj_bc_dummy_LINK) -xc /dev/null -Wl,-soname,libgcj_bc.so.1 \
+-	-o $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so.1.0.0 -lgcj || exit; \
++	-o $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so.1.0.0 -Wl,--no-as-needed -lgcj || exit; \
+ 	rm $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so.1; \
+ 	$(LN_S) libgcj_bc.so.1.0.0 $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so.1; \
+ 	rm $(DESTDIR)$(toolexeclibdir)/libgcj_bc.la;
+ 
+Index: b/libjava/Makefile.in
+===================================================================
+--- a/libjava/Makefile.in
++++ b/libjava/Makefile.in
+@@ -10644,13 +10648,13 @@
+ 	rm .libs/libgcj_bc.so; \
+ 	mv .libs/libgcj_bc.so.1.0.0 .libs/libgcj_bc.so; \
+ 	$(libgcj_bc_dummy_LINK) -xc /dev/null -Wl,-soname,libgcj_bc.so.1 \
+-	-o .libs/libgcj_bc.so.1.0.0 -lgcj || exit; \
++	-o .libs/libgcj_bc.so.1.0.0 -Wl,--no-as-needed -lgcj || exit; \
+ 	rm .libs/libgcj_bc.so.1; \
+ 	$(LN_S) libgcj_bc.so.1.0.0 .libs/libgcj_bc.so.1
+ 
+ install/libgcj_bc.la: $(libgcj_bc_la_OBJECTS) $(libgcj_bc_la_DEPENDENCIES) install/$(am__dirstamp)
+ 	$(libgcj_bc_la_LINK) $(am_libgcj_bc_la_rpath) $(libgcj_bc_la_LDFLAGS) \
+-	$(libgcj_bc_la_OBJECTS) $(libgcj_bc_la_LIBADD) $(LIBS)
++	$(libgcj_bc_la_OBJECTS) $(libgcj_bc_la_LIBADD) $(LIBS) -Wl,--no-as-needed -lgcj
+ 
+ $(propertyo_files): %.lo: classpath/resource/%
+ 	$(mkinstalldirs) `dirname $@`; \
+@@ -12494,7 +12498,7 @@
+ @USE_LIBGCJ_BC_TRUE@	rm $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so; \
+ @USE_LIBGCJ_BC_TRUE@	mv $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so.1.0.0 $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so; \
+ @USE_LIBGCJ_BC_TRUE@	$(libgcj_bc_dummy_LINK) -xc /dev/null -Wl,-soname,libgcj_bc.so.1 \
+-@USE_LIBGCJ_BC_TRUE@	-o $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so.1.0.0 -lgcj || exit; \
++@USE_LIBGCJ_BC_TRUE@	-o $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so.1.0.0 -Wl,--no-as-needed -lgcj || exit; \
+ @USE_LIBGCJ_BC_TRUE@	rm $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so.1; \
+ @USE_LIBGCJ_BC_TRUE@	$(LN_S) libgcj_bc.so.1.0.0 $(DESTDIR)$(toolexeclibdir)/libgcj_bc.so.1; \
+ @USE_LIBGCJ_BC_TRUE@	rm $(DESTDIR)$(toolexeclibdir)/libgcj_bc.la;
+
diff --git a/legacy/gcc6/011_all_default-warn-format-security.patch b/legacy/gcc6/011_all_default-warn-format-security.patch
new file mode 100644
index 000000000..a58383a8e
--- /dev/null
+++ b/legacy/gcc6/011_all_default-warn-format-security.patch
@@ -0,0 +1,43 @@
+Enable -Wformat and -Wformat-security by default.
+
+
+--- a/gcc/c-family/c.opt
++++ b/gcc/c-family/c.opt
+@@ -412,7 +412,7 @@ C ObjC C++ ObjC++ Var(warn_format_nonliteral) Warning LangEnabledBy(C ObjC C++ O
+ 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-y2k
+@@ -424,7 +424,7 @@ C ObjC C++ ObjC++ Var(warn_format_zero_length) Warning LangEnabledBy(C ObjC C++
+ 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
+--- a/gcc/doc/gcc.info
++++ b/gcc/doc/gcc.info
+@@ -3451,6 +3451,8 @@ compiler warns that an unrecognized option is present.
+           '-Wno-format-contains-nul', '-Wno-format-extra-args', and
+           '-Wno-format-zero-length'.  '-Wformat' is enabled by '-Wall'.
+ 
++          This option is enabled by default in Alpine Linux.
++
+      '-Wno-format-contains-nul'
+           If '-Wformat' is specified, do not warn about format strings
+           that contain NUL bytes.
+@@ -3496,6 +3498,8 @@ compiler warns that an unrecognized option is present.
+           future warnings may be added to '-Wformat-security' that are
+           not included in '-Wformat-nonliteral'.)
+ 
++          This option is enabled by default in Alpine Linux.
++
+      '-Wformat-y2k'
+           If '-Wformat' is specified, also warn about 'strftime' formats
+           that may yield only a two-digit year.
diff --git a/legacy/gcc6/012_all_default-warn-trampolines.patch b/legacy/gcc6/012_all_default-warn-trampolines.patch
new file mode 100644
index 000000000..9ab4378d4
--- /dev/null
+++ b/legacy/gcc6/012_all_default-warn-trampolines.patch
@@ -0,0 +1,25 @@
+Enable -Wtrampolines by default.
+
+
+--- a/gcc/common.opt
++++ b/gcc/common.opt
+@@ -648,7 +648,7 @@ 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
+--- a/gcc/doc/gcc.info
++++ b/gcc/doc/gcc.info
+@@ -4021,6 +4021,8 @@ compiler warns that an unrecognized option is present.
+      and thus requires the stack to be made executable in order for the
+      program to work properly.
+ 
++     This warning is enabled by default in Gentoo.
++
+ '-Wfloat-equal'
+      Warn if floating-point values are used in equality comparisons.
+ 
diff --git a/legacy/gcc6/020_all_msgfmt-libstdc++-link.patch b/legacy/gcc6/020_all_msgfmt-libstdc++-link.patch
new file mode 100644
index 000000000..a70ea50a0
--- /dev/null
+++ b/legacy/gcc6/020_all_msgfmt-libstdc++-link.patch
@@ -0,0 +1,39 @@
+Ensure that msgfmt doesn't encounter problems during gcc bootstrapping.
+
+Solves error messages like the following:
+
+msgfmt: /var/tmp/portage/sys-devel/gcc-4.1.2/work/build/./gcc/libgcc_s.so.1: version `GCC_4.2.0' not found (required by /usr/lib/gcc/x86_64-pc-linux-gnu/4.5.3/libstdc++.so.6)
+
+The libgcc_s.so used during build doesn't satisfy the needs of the
+libstdc++.so that msgfmt is linked against. On the other hand, msgfmt
+is used as a stand-alone application here, and what library it uses
+behind the scenes is of no concern to the gcc build process.
+Therefore, simply invoking it "as usual", i.e. without any special
+library path, will make it work as expected here.
+
+2011-09-19 Martin von Gagern
+
+References:
+https://bugs.gentoo.org/372377
+https://bugs.gentoo.org/295480
+
+--- gcc-4.1.2.orig/libstdc++-v3/po/Makefile.am
++++ gcc-4.1.2/libstdc++-v3/po/Makefile.am
+@@ -39,6 +39,7 @@ MSGFMT = msgfmt
+ EXTRA_DIST = string_literals.cc POTFILES.in $(PACKAGE).pot $(LOCALE_IN)
+ 
+ .po.mo:
++	env --unset=LD_LIBRARY_PATH \
+ 	$(MSGFMT) -o $@ $<
+ 
+ all-local: all-local-$(USE_NLS)
+--- gcc-4.1.2.orig/libstdc++-v3/po/Makefile.in
++++ gcc-4.1.2/libstdc++-v3/po/Makefile.in
+@@ -419,6 +419,7 @@ uninstall-am: uninstall-info-am
+ 
+ 
+ .po.mo:
++	env --unset=LD_LIBRARY_PATH \
+ 	$(MSGFMT) -o $@ $<
+ 
+ all-local: all-local-$(USE_NLS)
diff --git a/legacy/gcc6/050_all_libiberty-asprintf.patch b/legacy/gcc6/050_all_libiberty-asprintf.patch
new file mode 100644
index 000000000..bee0c4c23
--- /dev/null
+++ b/legacy/gcc6/050_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/legacy/gcc6/051_all_libiberty-pic.patch b/legacy/gcc6/051_all_libiberty-pic.patch
new file mode 100644
index 000000000..b6160a730
--- /dev/null
+++ b/legacy/gcc6/051_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 $(TARGETLIB) ../ ; \
+ 	  cd ..; \
+ 	else true; fi
+ 
diff --git a/legacy/gcc6/053_all_libitm-no-fortify-source.patch b/legacy/gcc6/053_all_libitm-no-fortify-source.patch
new file mode 100644
index 000000000..5ab15afc3
--- /dev/null
+++ b/legacy/gcc6/053_all_libitm-no-fortify-source.patch
@@ -0,0 +1,27 @@
+https://bugs.gentoo.org/508852
+https://gcc.gnu.org/PR61164
+
+2014-04-27  Magnus Granberg  <zorry@gentoo.org>
+
+	#508852
+	* libitm/configure.tgt: Disable FORTIFY
+
+--- a/libitm/configure.tgt
++++ b/libitm/configure.tgt
+@@ -43,6 +43,16 @@ if test "$gcc_cv_have_tls" = yes ; then
+   esac
+ fi
+ 
++# FIXME: error: inlining failed in call to always_inline 
++# ‘int vfprintf(FILE*, const char*, __va_list_tag*)’
++# : function body can be overwritten at link time
++# Disable Fortify in libitm for now. #508852
++case "${target}" in
++    *-*-linux*)
++	XCFLAGS="${XCFLAGS} -U_FORTIFY_SOURCE"
++	;;
++esac
++
+ # Map the target cpu to an ARCH sub-directory.  At the same time,
+ # work out any special compilation flags as necessary.
+ case "${target_cpu}" in
diff --git a/legacy/gcc6/067_all_gcc-poison-system-directories.patch b/legacy/gcc6/067_all_gcc-poison-system-directories.patch
new file mode 100644
index 000000000..103671617
--- /dev/null
+++ b/legacy/gcc6/067_all_gcc-poison-system-directories.patch
@@ -0,0 +1,194 @@
+http://cgit.openembedded.org/openembedded-core/plain/meta/recipes-devtools/gcc/gcc-6.1/0010-gcc-poison-system-directories.patch
+
+From d76250323dad69212c958e4857a98d99ab51a39e Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Fri, 29 Mar 2013 08:59:00 +0400
+Subject: [PATCH 10/46] gcc: poison-system-directories
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+Upstream-Status: Inappropriate [distribution: codesourcery]
+---
+ gcc/common.opt      |  4 ++++
+ gcc/config.in       |  6 ++++++
+ gcc/configure       | 16 ++++++++++++++++
+ gcc/configure.ac    | 10 ++++++++++
+ gcc/doc/invoke.texi |  9 +++++++++
+ gcc/gcc.c           |  2 ++
+ gcc/incpath.c       | 19 +++++++++++++++++++
+ 7 files changed, 66 insertions(+)
+
+diff --git a/gcc/common.opt b/gcc/common.opt
+index 67048db..733185c 100644
+--- a/gcc/common.opt
++++ b/gcc/common.opt
+@@ -659,6 +659,10 @@ Wreturn-local-addr
+ Common Var(warn_return_local_addr) Init(1) Warning
+ Warn about returning a pointer/reference to a local or temporary variable.
+ 
++Wpoison-system-directories
++Common Var(flag_poison_system_directories) Init(1) Warning
++Warn for -I and -L options using system directories if cross compiling
++
+ Wshadow
+ Common Var(warn_shadow) Warning
+ Warn when one local variable shadows another.
+diff --git a/gcc/config.in b/gcc/config.in
+index 115cb61..105b30f 100644
+--- a/gcc/config.in
++++ b/gcc/config.in
+@@ -187,6 +187,12 @@
+ #endif
+ 
+ 
++/* Define to warn for use of native system header directories */
++#ifndef USED_FOR_TARGET
++#undef ENABLE_POISON_SYSTEM_DIRECTORIES
++#endif
++
++
+ /* Define if you want all operations on RTL (the basic data structure of the
+    optimizer and back end) to be checked for dynamic type safety at runtime.
+    This is quite expensive. */
+diff --git a/gcc/configure b/gcc/configure
+index 1c6e340..8f83152 100755
+--- a/gcc/configure
++++ b/gcc/configure
+@@ -942,6 +942,7 @@ with_system_zlib
+ enable_maintainer_mode
+ enable_link_mutex
+ enable_version_specific_runtime_libs
++enable_poison_system_directories
+ enable_plugin
+ enable_host_shared
+ enable_libquadmath_support
+@@ -1681,6 +1682,8 @@ Optional Features:
+   --enable-version-specific-runtime-libs
+                           specify that runtime libraries should be installed
+                           in a compiler-specific directory
++  --enable-poison-system-directories
++                          warn for use of native system header directories
+   --enable-plugin         enable plugin support
+   --enable-host-shared    build host code as shared libraries
+   --disable-libquadmath-support
+@@ -28908,6 +28911,19 @@ if test "${enable_version_specific_runtime_libs+set}" = set; then :
+ fi
+ 
+ 
++# Check whether --enable-poison-system-directories was given.
++if test "${enable_poison_system_directories+set}" = set; then :
++  enableval=$enable_poison_system_directories;
++else
++  enable_poison_system_directories=no
++fi
++
++if test "x${enable_poison_system_directories}" = "xyes"; then
++
++$as_echo "#define ENABLE_POISON_SYSTEM_DIRECTORIES 1" >>confdefs.h
++
++fi
++
+ # Substitute configuration variables
+ 
+ 
+diff --git a/gcc/configure.ac b/gcc/configure.ac
+index 6c1dcd9..0fccaef 100644
+--- a/gcc/configure.ac
++++ b/gcc/configure.ac
+@@ -5861,6 +5861,16 @@ AC_ARG_ENABLE(version-specific-runtime-libs,
+                 [specify that runtime libraries should be
+                  installed in a compiler-specific directory])])
+ 
++AC_ARG_ENABLE([poison-system-directories],
++             AS_HELP_STRING([--enable-poison-system-directories],
++                            [warn for use of native system header directories]),,
++             [enable_poison_system_directories=no])
++if test "x${enable_poison_system_directories}" = "xyes"; then
++  AC_DEFINE([ENABLE_POISON_SYSTEM_DIRECTORIES],
++           [1],
++           [Define to warn for use of native system header directories])
++fi
++
+ # Substitute configuration variables
+ AC_SUBST(subdirs)
+ AC_SUBST(srcdir)
+diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
+index 821f8fd..8bb49e7 100644
+--- a/gcc/doc/invoke.texi
++++ b/gcc/doc/invoke.texi
+@@ -284,6 +284,7 @@ Objective-C and Objective-C++ Dialects}.
+ -Wparentheses -Wno-pedantic-ms-format @gol
+ -Wplacement-new -Wplacement-new=@var{n} @gol
+ -Wpointer-arith  -Wno-pointer-to-int-cast @gol
++-Wno-poison-system-directories @gol
+ -Wno-pragmas -Wredundant-decls  -Wno-return-local-addr @gol
+ -Wreturn-type  -Wsequence-point  -Wshadow  -Wno-shadow-ivar @gol
+ -Wshift-overflow -Wshift-overflow=@var{n} @gol
+@@ -4723,6 +4724,14 @@ made up of data only and thus requires no special treatment.  But, for
+ most targets, it is made up of code and thus requires the stack to be
+ made executable in order for the program to work properly.
+ 
++@item -Wno-poison-system-directories
++@opindex Wno-poison-system-directories
++Do not warn for @option{-I} or @option{-L} options using system
++directories such as @file{/usr/include} when cross compiling.  This
++option is intended for use in chroot environments when such
++directories contain the correct headers and libraries for the target
++system rather than the host.
++
+ @item -Wfloat-equal
+ @opindex Wfloat-equal
+ @opindex Wno-float-equal
+diff --git a/gcc/gcc.c b/gcc/gcc.c
+index 1af5920..4cfef7f 100644
+--- a/gcc/gcc.c
++++ b/gcc/gcc.c
+@@ -1017,6 +1017,8 @@ proper position among the other output files.  */
+    "%{fuse-ld=*:-fuse-ld=%*} " LINK_COMPRESS_DEBUG_SPEC \
+    "%X %{o*} %{e*} %{N} %{n} %{r}\
+     %{s} %{t} %{u*} %{z} %{Z} %{!nostdlib:%{!nostartfiles:%S}} \
++    %{Wno-poison-system-directories:--no-poison-system-directories} \
++    %{Werror=poison-system-directories:--error-poison-system-directories} \
+     %{static:} %{L*} %(mfwrap) %(link_libgcc) " \
+     VTABLE_VERIFICATION_SPEC " " SANITIZER_EARLY_SPEC " %o " CHKP_SPEC " \
+     %{fopenacc|fopenmp|%:gt(%{ftree-parallelize-loops=*:%*} 1):\
+diff --git a/gcc/incpath.c b/gcc/incpath.c
+index ea40f4a..856da41 100644
+--- a/gcc/incpath.c
++++ b/gcc/incpath.c
+@@ -26,6 +26,7 @@
+ #include "intl.h"
+ #include "incpath.h"
+ #include "cppdefault.h"
++#include "diagnostic-core.h"
+ 
+ /* Microsoft Windows does not natively support inodes.
+    VMS has non-numeric inodes.  */
+@@ -381,6 +382,24 @@ merge_include_chains (const char *sysroot, cpp_reader *pfile, int verbose)
+ 	}
+       fprintf (stderr, _("End of search list.\n"));
+     }
++
++#ifdef ENABLE_POISON_SYSTEM_DIRECTORIES
++  if (flag_poison_system_directories)
++    {
++       struct cpp_dir *p;
++
++       for (p = heads[QUOTE]; p; p = p->next)
++         {
++          if ((!strncmp (p->name, "/usr/include", 12))
++              || (!strncmp (p->name, "/usr/local/include", 18))
++              || (!strncmp (p->name, "/usr/X11R6/include", 18)))
++            warning (OPT_Wpoison_system_directories,
++                     "include location \"%s\" is unsafe for "
++                     "cross-compilation",
++                     p->name);
++         }
++    }
++#endif
+ }
+ 
+ /* Use given -I paths for #include "..." but not #include <...>, and
+-- 
+2.8.2
+
diff --git a/legacy/gcc6/090_all_pr55930-dependency-tracking.patch b/legacy/gcc6/090_all_pr55930-dependency-tracking.patch
new file mode 100644
index 000000000..a8743e08c
--- /dev/null
+++ b/legacy/gcc6/090_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/legacy/gcc6/201-cilkrts.patch b/legacy/gcc6/201-cilkrts.patch
new file mode 100644
index 000000000..4aac10d6d
--- /dev/null
+++ b/legacy/gcc6/201-cilkrts.patch
@@ -0,0 +1,59 @@
+From 594e3c1ab576daddeb86015efc8b1677020b1878 Mon Sep 17 00:00:00 2001
+From: Szabolcs Nagy <nsz@port70.net>
+Date: Sat, 24 Oct 2015 20:39:30 +0000
+Subject: [PATCH 1/6] cilkrts
+
+---
+ libcilkrts/runtime/os-unix.c | 22 +++++++---------------
+ 1 file changed, 7 insertions(+), 15 deletions(-)
+
+diff --git a/libcilkrts/runtime/os-unix.c b/libcilkrts/runtime/os-unix.c
+index cb582dd..e43d7d5 100644
+--- a/libcilkrts/runtime/os-unix.c
++++ b/libcilkrts/runtime/os-unix.c
+@@ -51,6 +51,7 @@
+ #if defined __linux__
+ #   include <sys/sysinfo.h>
+ #   include <sys/syscall.h>
++#   include <sched.h>
+ #elif defined __APPLE__
+ #   include <sys/sysctl.h>
+     // Uses sysconf(_SC_NPROCESSORS_ONLN) in verbose output
+@@ -400,28 +401,19 @@ COMMON_SYSDEP void __cilkrts_sleep(void)
+ 
+ COMMON_SYSDEP void __cilkrts_yield(void)
+ {
+-#if __APPLE__ || __FreeBSD__ || __VXWORKS__
+-    // On MacOS, call sched_yield to yield quantum.  I'm not sure why we
+-    // don't do this on Linux also.
+-    sched_yield();
+-#elif defined(__DragonFly__)
+-    // On DragonFly BSD, call sched_yield to yield quantum.
+-    sched_yield();
+-#elif defined(__MIC__)
++#if defined(__MIC__)
+     // On MIC, pthread_yield() really trashes things.  Arch's measurements
+     // showed that calling _mm_delay_32() (or doing nothing) was a better
+     // option.  Delaying 1024 clock cycles is a reasonable compromise between
+     // giving up the processor and latency starting up when work becomes
+     // available
+     _mm_delay_32(1024);
+-#elif defined(__ANDROID__) || (defined(__sun__) && defined(__svr4__))
+-    // On Android and Solaris, call sched_yield to yield quantum.  I'm not
+-    // sure why we don't do this on Linux also.
+-    sched_yield();
+-#else
+-    // On Linux, call pthread_yield (which in turn will call sched_yield)
+-    // to yield quantum.
++#elif defined(__sun__) && !defined(__svr4__)
++    // On old SunOS call pthread_yield to yield a quantum.
+     pthread_yield();
++#else
++    // On other platforms call sched_yield to yield a quantum.
++    sched_yield();
+ #endif
+ }
+ 
+-- 
+2.8.1
+
diff --git a/legacy/gcc6/203-libgcc_s.patch b/legacy/gcc6/203-libgcc_s.patch
new file mode 100644
index 000000000..c74351c71
--- /dev/null
+++ b/legacy/gcc6/203-libgcc_s.patch
@@ -0,0 +1,56 @@
+From 9e3eab51e518018d9d99b3123598b1e2322a6af3 Mon Sep 17 00:00:00 2001
+From: Szabolcs Nagy <nsz@port70.net>
+Date: Sat, 24 Oct 2015 20:09:53 +0000
+Subject: [PATCH 3/6] libgcc_s
+
+---
+ gcc/config/i386/i386.c       | 4 ++--
+ libgcc/config/i386/cpuinfo.c | 6 +++---
+ libgcc/config/i386/t-linux   | 2 +-
+ 3 files changed, 6 insertions(+), 6 deletions(-)
+
+diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
+index 3d044e8..82523e1 100644
+--- a/gcc/config/i386/i386.c
++++ b/gcc/config/i386/i386.c
+@@ -40269,10 +40269,10 @@ ix86_expand_builtin (tree exp, rtx target, rtx subtarget,
+     {
+     case IX86_BUILTIN_CPU_INIT:
+       {
+-	/* Make it call __cpu_indicator_init in libgcc. */
++	/* Make it call __cpu_indicator_init_local in libgcc.a. */
+ 	tree call_expr, fndecl, type;
+         type = build_function_type_list (integer_type_node, NULL_TREE); 
+-	fndecl = build_fn_decl ("__cpu_indicator_init", type);
++	fndecl = build_fn_decl ("__cpu_indicator_init_local", type);
+ 	call_expr = build_call_expr (fndecl, 0); 
+ 	return expand_expr (call_expr, target, mode, EXPAND_NORMAL);
+       }
+diff --git a/libgcc/config/i386/cpuinfo.c b/libgcc/config/i386/cpuinfo.c
+index 8c2248d..6c82f15 100644
+--- a/libgcc/config/i386/cpuinfo.c
++++ b/libgcc/config/i386/cpuinfo.c
+@@ -485,7 +485,7 @@ __cpu_indicator_init (void)
+   return 0;
+ }
+ 
+-#if defined SHARED && defined USE_ELF_SYMVER
+-__asm__ (".symver __cpu_indicator_init, __cpu_indicator_init@GCC_4.8.0");
+-__asm__ (".symver __cpu_model, __cpu_model@GCC_4.8.0");
++#ifndef SHARED
++int __cpu_indicator_init_local (void)
++  __attribute__ ((weak, alias ("__cpu_indicator_init")));
+ #endif
+diff --git a/libgcc/config/i386/t-linux b/libgcc/config/i386/t-linux
+index 11bb46e..4f47f7b 100644
+--- a/libgcc/config/i386/t-linux
++++ b/libgcc/config/i386/t-linux
+@@ -3,4 +3,4 @@
+ # t-slibgcc-elf-ver and t-linux
+ SHLIB_MAPFILES = libgcc-std.ver $(srcdir)/config/i386/libgcc-glibc.ver
+ 
+-HOST_LIBGCC2_CFLAGS += -mlong-double-80 -DUSE_ELF_SYMVER
++HOST_LIBGCC2_CFLAGS += -mlong-double-80
+-- 
+2.8.1
+
diff --git a/legacy/gcc6/204-linux_libc_has_function.patch b/legacy/gcc6/204-linux_libc_has_function.patch
new file mode 100644
index 000000000..2dcedc3a7
--- /dev/null
+++ b/legacy/gcc6/204-linux_libc_has_function.patch
@@ -0,0 +1,25 @@
+From edec78452d693fb524daa9a6efd45c850b27b25c Mon Sep 17 00:00:00 2001
+From: Szabolcs Nagy <nsz@port70.net>
+Date: Fri, 6 Nov 2015 23:59:20 +0000
+Subject: [PATCH 4/6] linux_libc_has_function
+
+---
+ gcc/config/linux.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/gcc/config/linux.c b/gcc/config/linux.c
+index 250296b..16c3768 100644
+--- a/gcc/config/linux.c
++++ b/gcc/config/linux.c
+@@ -26,7 +26,7 @@ along with GCC; see the file COPYING3.  If not see
+ bool
+ linux_libc_has_function (enum function_class fn_class)
+ {
+-  if (OPTION_GLIBC)
++  if (OPTION_GLIBC || OPTION_MUSL)
+     return true;
+   if (OPTION_BIONIC)
+     if (fn_class == function_c94
+-- 
+2.8.1
+
diff --git a/legacy/gcc6/205-nopie.patch b/legacy/gcc6/205-nopie.patch
new file mode 100644
index 000000000..e3da94d10
--- /dev/null
+++ b/legacy/gcc6/205-nopie.patch
@@ -0,0 +1,75 @@
+From b6015aca9c9cc83739fd0ed637a835119b2c4e34 Mon Sep 17 00:00:00 2001
+From: Szabolcs Nagy <nsz@port70.net>
+Date: Sat, 7 Nov 2015 02:08:05 +0000
+Subject: [PATCH 5/6] nopie
+
+---
+ gcc/configure    | 27 +++++++++++++++++++++++++++
+ gcc/configure.ac | 13 +++++++++++++
+ 2 files changed, 40 insertions(+)
+
+diff --git a/gcc/configure b/gcc/configure
+index 1c6e340..7e8b5d6 100755
+--- a/gcc/configure
++++ b/gcc/configure
+@@ -29390,6 +29390,33 @@ fi
+ $as_echo "$gcc_cv_no_pie" >&6; }
+ if test "$gcc_cv_no_pie" = "yes"; then
+   NO_PIE_FLAG="-no-pie"
++else
++  # Check if -nopie works.
++  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -nopie option" >&5
++$as_echo_n "checking for -nopie option... " >&6; }
++if test "${gcc_cv_nopie+set}" = set; then :
++  $as_echo_n "(cached) " >&6
++else
++  saved_LDFLAGS="$LDFLAGS"
++     LDFLAGS="$LDFLAGS -nopie"
++     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
++/* end confdefs.h.  */
++int main(void) {return 0;}
++_ACEOF
++if ac_fn_cxx_try_link "$LINENO"; then :
++  gcc_cv_nopie=yes
++else
++  gcc_cv_nopie=no
++fi
++rm -f core conftest.err conftest.$ac_objext \
++    conftest$ac_exeext conftest.$ac_ext
++     LDFLAGS="$saved_LDFLAGS"
++fi
++{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_nopie" >&5
++$as_echo "$gcc_cv_nopie" >&6; }
++  if test "$gcc_cv_nopie" = "yes"; then
++    NO_PIE_FLAG="-nopie"
++  fi
+ fi
+ 
+ 
+diff --git a/gcc/configure.ac b/gcc/configure.ac
+index 6c1dcd9..0ca7647 100644
+--- a/gcc/configure.ac
++++ b/gcc/configure.ac
+@@ -6098,6 +6098,19 @@ AC_CACHE_CHECK([for -no-pie option],
+    LDFLAGS="$saved_LDFLAGS"])
+ if test "$gcc_cv_no_pie" = "yes"; then
+   NO_PIE_FLAG="-no-pie"
++else
++  # Check if -nopie works.
++  AC_CACHE_CHECK([for -nopie option],
++    [gcc_cv_nopie],
++    [saved_LDFLAGS="$LDFLAGS"
++     LDFLAGS="$LDFLAGS -nopie"
++     AC_LINK_IFELSE([int main(void) {return 0;}],
++       [gcc_cv_nopie=yes],
++       [gcc_cv_nopie=no])
++     LDFLAGS="$saved_LDFLAGS"])
++  if test "$gcc_cv_nopie" = "yes"; then
++    NO_PIE_FLAG="-nopie"
++  fi
+ fi
+ AC_SUBST([NO_PIE_FLAG])
+ 
+-- 
+2.8.1
+
diff --git a/legacy/gcc6/207-static-pie.patch b/legacy/gcc6/207-static-pie.patch
new file mode 100644
index 000000000..9355c584b
--- /dev/null
+++ b/legacy/gcc6/207-static-pie.patch
@@ -0,0 +1,40 @@
+diff --git a/gcc/config/gnu-user.h b/gcc/config/gnu-user.h
+index b0bf40a..d4b56fe 100644
+--- a/gcc/config/gnu-user.h
++++ b/gcc/config/gnu-user.h
+@@ -51,10 +51,10 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+ #if defined HAVE_LD_PIE
+ #define GNU_USER_TARGET_STARTFILE_SPEC \
+   "%{!shared: %{pg|p|profile:gcrt1.o%s;: \
+-    %{" PIE_SPEC ":Scrt1.o%s} %{" NO_PIE_SPEC ":crt1.o%s}}} \
+-   crti.o%s %{static:crtbeginT.o%s;: %{shared:crtbeginS.o%s} \
++    %{" PIE_SPEC ":%{static:rcrt1.o%s;:Scrt1.o%s}} %{" NO_PIE_SPEC ":crt1.o%s}}} \
++   crti.o%s %{shared:crtbeginS.o%s;: \
+ 	      %{" PIE_SPEC ":crtbeginS.o%s} \
+-	      %{" NO_PIE_SPEC ":crtbegin.o%s}} \
++	      %{" NO_PIE_SPEC ":%{static:crtbeginT.o%s;:crtbegin.o%s}}} \
+    %{fvtable-verify=none:%s; \
+      fvtable-verify=preinit:vtv_start_preinit.o%s; \
+      fvtable-verify=std:vtv_start.o%s} \
+diff --git a/gcc/gcc.c b/gcc/gcc.c
+index 0208d61..731564e 100644
+--- a/gcc/gcc.c
++++ b/gcc/gcc.c
+@@ -870,7 +870,7 @@ proper position among the other output files.  */
+ #endif
+ 
+ #ifdef ENABLE_DEFAULT_PIE
+-#define NO_PIE_SPEC		"no-pie|static"
++#define NO_PIE_SPEC		"no-pie"
+ #define PIE_SPEC		NO_PIE_SPEC "|r|shared:;"
+ #define NO_FPIE1_SPEC		"fno-pie"
+ #define FPIE1_SPEC		NO_FPIE1_SPEC ":;"
+@@ -916,7 +916,7 @@ proper position among the other output files.  */
+ #ifndef LINK_PIE_SPEC
+ #ifdef HAVE_LD_PIE
+ #ifndef LD_PIE_SPEC
+-#define LD_PIE_SPEC "-pie"
++#define LD_PIE_SPEC "-pie %{static:--no-dynamic-linker -Bsymbolic}"
+ #endif
+ #else
+ #define LD_PIE_SPEC ""
diff --git a/legacy/gcc6/300-main-gcc-add-musl-s390x-dynamic-linker.patch b/legacy/gcc6/300-main-gcc-add-musl-s390x-dynamic-linker.patch
new file mode 100644
index 000000000..241957871
--- /dev/null
+++ b/legacy/gcc6/300-main-gcc-add-musl-s390x-dynamic-linker.patch
@@ -0,0 +1,32 @@
+From be841c16dd544553c67faac79bd4cc3cd10a1dc0 Mon Sep 17 00:00:00 2001
+From: "Tuan M. Hoang" <tmhoang@flatglobe.org>
+Date: Mon, 21 Nov 2016 01:42:16 +0700
+Subject: [PATCH] main/gcc: add musl s390x dynamic linker
+
+---
+ gcc/config/s390/linux.h | 9 +++++++++
+ 1 file changed, 9 insertions(+)
+
+diff --git a/gcc/config/s390/linux.h b/gcc/config/s390/linux.h
+index 1e3ed35..a244214 100644
+--- a/gcc/config/s390/linux.h
++++ b/gcc/config/s390/linux.h
+@@ -63,6 +63,15 @@ along with GCC; see the file COPYING3.  If not see
+ #define GLIBC_DYNAMIC_LINKER32 "/lib/ld.so.1"
+ #define GLIBC_DYNAMIC_LINKER64 "/lib/ld64.so.1"
+ 
++#undef MUSL_DYNAMIC_LINKER
++#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-s390x.so.1"
++#undef MUSL_DYNAMIC_LINKER32
++#define MUSL_DYNAMIC_LINKER32 "/lib/ld-musl-s390x.so.1"
++#undef MUSL_DYNAMIC_LINKER64
++#define MUSL_DYNAMIC_LINKER64 "/lib/ld-musl-s390x.so.1"
++#undef MUSL_DYNAMIC_LINKERX32
++#define MUSL_DYNAMIC_LINKERX32 "/lib/ld-musl-s390x.so.1"
++
+ #undef  LINK_SPEC
+ #define LINK_SPEC \
+   "%{m31:-m elf_s390}%{m64:-m elf64_s390} --as-needed \
+-- 
+2.10.2
+
diff --git a/legacy/gcc6/310-build-gcj-s390x.patch b/legacy/gcc6/310-build-gcj-s390x.patch
new file mode 100644
index 000000000..1e522ee15
--- /dev/null
+++ b/legacy/gcc6/310-build-gcj-s390x.patch
@@ -0,0 +1,28 @@
+From 697a7ba791fce2ffab2ed723d909a89684019e3d Mon Sep 17 00:00:00 2001
+From: "Tuan M. Hoang" <tmhoang@flatglobe.org>
+Date: Sun, 19 Feb 2017 17:03:33 +0000
+Subject: [PATCH] main/gcc : when building gcc-java on s390x, libgcj.so
+ complains about undefined reference to __data_start. Using
+ SEARCH_FOR_DATA_START instead solved it. Credit to Andrew Haley at RedHat.
+
+---
+ boehm-gc/include/private/gcconfig.h | 3 +--
+ 1 file changed, 1 insertion(+), 2 deletions(-)
+
+diff --git a/boehm-gc/include/private/gcconfig.h b/boehm-gc/include/private/gcconfig.h
+index 4ca6a80..a15fff6 100644
+--- a/boehm-gc/include/private/gcconfig.h
++++ b/boehm-gc/include/private/gcconfig.h
+@@ -1837,8 +1837,7 @@
+ #       define OS_TYPE "LINUX"
+ #       define LINUX_STACKBOTTOM
+ #       define DYNAMIC_LOADING
+-	extern int __data_start[];
+-#       define DATASTART ((ptr_t)(__data_start))
++#       define SEARCH_FOR_DATA_START
+     extern int _end[];
+ #   define DATAEND (_end)
+ #   define CACHE_LINE_SIZE 256
+-- 
+2.11.1
+
diff --git a/legacy/gcc6/320-libffi-gnulinux.patch b/legacy/gcc6/320-libffi-gnulinux.patch
new file mode 100644
index 000000000..b3b4fc931
--- /dev/null
+++ b/legacy/gcc6/320-libffi-gnulinux.patch
@@ -0,0 +1,13 @@
+diff --git a/libffi/closures.c.orig b/libffi/closures.c
+index 721ff00..22a699c 100644
+--- a/libffi/src/closures.c.orig
++++ b/libffi/src/closures.c
+@@ -34,7 +34,7 @@
+ #include <ffi_common.h>
+
+ #if !FFI_MMAP_EXEC_WRIT && !FFI_EXEC_TRAMPOLINE_TABLE
+-# if __gnu_linux__ && !defined(__ANDROID__)
++# if __linux__ && !defined(__ANDROID__)
+ /* This macro indicates it may be forbidden to map anonymous memory
+    with both write and execute permission.  Code compiled when this
+    option is defined will attempt to map such pages once, but if it
diff --git a/legacy/gcc6/330-gccgo-link-to-ucontext.patch b/legacy/gcc6/330-gccgo-link-to-ucontext.patch
new file mode 100644
index 000000000..8aa60ca54
--- /dev/null
+++ b/legacy/gcc6/330-gccgo-link-to-ucontext.patch
@@ -0,0 +1,11 @@
+--- gcc-6.4.0/Makefile.in.old	2018-06-21 22:16:35.167781541 -0500
++++ gcc-6.4.0/Makefile.in	2018-06-22 00:36:13.849486086 -0500
+@@ -41332,7 +41332,7 @@
+ 	esac; \
+ 	module_srcdir=libgo; \
+ 	rm -f no-such-file || : ; \
+-	CONFIG_SITE=no-such-file $(SHELL) \
++	CONFIG_SITE=no-such-file LIBS="-lucontext $$LIBS" $(SHELL) \
+ 	  $$s/$$module_srcdir/configure \
+ 	  --srcdir=$${topdir}/$$module_srcdir \
+ 	  $(TARGET_CONFIGARGS) --build=${build_alias} --host=${target_alias} \
diff --git a/legacy/gcc6/331-gccgo-use-real-off_t-type.patch b/legacy/gcc6/331-gccgo-use-real-off_t-type.patch
new file mode 100644
index 000000000..1c8c43e9e
--- /dev/null
+++ b/legacy/gcc6/331-gccgo-use-real-off_t-type.patch
@@ -0,0 +1,30 @@
+--- gcc-6.4.0/libgo/go/syscall/libcall_linux.go.old	2016-02-03 15:58:02.419872000 -0600
++++ gcc-6.4.0/libgo/go/syscall/libcall_linux.go	2018-06-22 00:56:31.478280552 -0500
+@@ -355,19 +355,19 @@
+ //sys	Setxattr(path string, attr string, data []byte, flags int) (err error)
+ //setxattr(path *byte, name *byte, value *byte, size Size_t, flags _C_int) _C_int
+ 
+-//sys	splice(rfd int, roff *_loff_t, wfd int, woff *_loff_t, len int, flags int) (n int64, err error)
+-//splice(rfd _C_int, roff *_loff_t, wfd _C_int, woff *_loff_t, len Size_t, flags _C_uint) Ssize_t
++//sys	splice(rfd int, roff *_off_t, wfd int, woff *_off_t, len int, flags int) (n int64, err error)
++//splice(rfd _C_int, roff *_off_t, wfd _C_int, woff *_off_t, len Size_t, flags _C_uint) Ssize_t
+ func Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error) {
+-	var lroff _loff_t
+-	var plroff *_loff_t
++	var lroff _off_t
++	var plroff *_off_t
+ 	if roff != nil {
+-		lroff = _loff_t(*roff)
++		lroff = _off_t(*roff)
+ 		plroff = &lroff
+ 	}
+-	var lwoff _loff_t
+-	var plwoff *_loff_t
++	var lwoff _off_t
++	var plwoff *_off_t
+ 	if woff != nil {
+-		lwoff = _loff_t(*woff)
++		lwoff = _off_t(*woff)
+ 		plwoff = &lwoff
+ 	}
+ 	n, err = splice(rfd, plroff, wfd, plwoff, len, flags)
diff --git a/legacy/gcc6/332-gccgo-remove-ustat.patch b/legacy/gcc6/332-gccgo-remove-ustat.patch
new file mode 100644
index 000000000..90aa65ad7
--- /dev/null
+++ b/legacy/gcc6/332-gccgo-remove-ustat.patch
@@ -0,0 +1,190 @@
+From bdead75ea02fa852a559f35b41453df0c47c9a66 Mon Sep 17 00:00:00 2001
+From: Ian Lance Taylor <iant@golang.org>
+Date: Fri, 22 Jun 2018 06:24:48 -0700
+Subject: [PATCH] syscall: remove Ustat
+
+glibc 2.28 removes ustat.h and the ustat function entirely, which
+breaks syscall.Ustat.
+
+Updates golang/go#25990
+
+Change-Id: I430802c86389a02cb4a0cd6caff36fa542d98f2f
+Reviewed-on: https://go-review.googlesource.com/120535
+Reviewed-by: Than McIntosh <thanm@google.com>
+---
+ libgo/config.h.in                       |  3 ---
+ libgo/configure                         | 33 ---------------------------------
+ libgo/configure.ac                      | 18 ------------------
+ libgo/go/syscall/libcall_linux_ustat.go | 12 ------------
+ libgo/mksysinfo.sh                      | 14 --------------
+ libgo/sysinfo.c                         |  3 ---
+ 6 files changed, 83 deletions(-)
+ delete mode 100644 libgo/go/syscall/libcall_linux_ustat.go
+
+diff --git a/libgo/config.h.in b/libgo/config.h.in
+index 57560cd0..de57d0cc 100644
+--- a/libgo/config.h.in
++++ b/libgo/config.h.in
+@@ -343,9 +343,6 @@
+ /* Define to 1 if you have the `unshare' function. */
+ #undef HAVE_UNSHARE
+ 
+-/* Define to 1 if you have the <ustat.h> header file and it works. */
+-#undef HAVE_USTAT_H
+-
+ /* Define to 1 if you have the `utimensat' function. */
+ #undef HAVE_UTIMENSAT
+ 
+diff --git a/libgo/configure b/libgo/configure
+index 66942eda..7166f940 100755
+--- a/libgo/configure
++++ b/libgo/configure
+@@ -14760,39 +14760,6 @@ fi
+ done
+ 
+ 
+-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether <ustat.h> can be used" >&5
+-$as_echo_n "checking whether <ustat.h> can be used... " >&6; }
+-if test "${libgo_cv_c_ustat_h+set}" = set; then :
+-  $as_echo_n "(cached) " >&6
+-else
+-  CFLAGS_hold=$CFLAGS
+-CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS"
+-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+-/* end confdefs.h.  */
+-
+-#include <sys/types.h>
+-#ifdef HAVE_LINUX_FILTER_H
+-#include <linux/filter.h>
+-#endif
+-#include <ustat.h>
+-
+-_ACEOF
+-if ac_fn_c_try_compile "$LINENO"; then :
+-  libgo_cv_c_ustat_h=yes
+-else
+-  libgo_cv_c_ustat_h=no
+-fi
+-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+-CFLAGS=$CFLAGS_hold
+-fi
+-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libgo_cv_c_ustat_h" >&5
+-$as_echo "$libgo_cv_c_ustat_h" >&6; }
+-if test $libgo_cv_c_ustat_h = yes; then
+-
+-$as_echo "#define HAVE_USTAT_H 1" >>confdefs.h
+-
+-fi
+-
+  if test "$ac_cv_header_sys_mman_h" = yes; then
+   HAVE_SYS_MMAN_H_TRUE=
+   HAVE_SYS_MMAN_H_FALSE='#'
+diff --git a/libgo/configure.ac b/libgo/configure.ac
+index 3cee2c0f..1c192752 100644
+--- a/libgo/configure.ac
++++ b/libgo/configure.ac
+@@ -537,24 +537,6 @@ AC_CHECK_HEADERS([linux/filter.h linux/if_addr.h linux/if_ether.h linux/if_tun.h
+ #endif
+ ])
+ 
+-AC_CACHE_CHECK([whether <ustat.h> can be used],
+-[libgo_cv_c_ustat_h],
+-[CFLAGS_hold=$CFLAGS
+-CFLAGS="$CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE $OSCFLAGS"
+-AC_COMPILE_IFELSE(
+-[AC_LANG_SOURCE([
+-#include <sys/types.h>
+-#ifdef HAVE_LINUX_FILTER_H
+-#include <linux/filter.h>
+-#endif
+-#include <ustat.h>
+-])], [libgo_cv_c_ustat_h=yes], [libgo_cv_c_ustat_h=no])
+-CFLAGS=$CFLAGS_hold])
+-if test $libgo_cv_c_ustat_h = yes; then
+-  AC_DEFINE(HAVE_USTAT_H, 1,
+-    [Define to 1 if you have the <ustat.h> header file and it works.])
+-fi
+-
+ AM_CONDITIONAL(HAVE_SYS_MMAN_H, test "$ac_cv_header_sys_mman_h" = yes)
+ 
+ AC_CHECK_FUNCS(strerror_r strsignal wait4 mincore setenv unsetenv dl_iterate_phdr)
+diff --git a/libgo/mksysinfo.sh b/libgo/mksysinfo.sh
+index 92ecb479..48bc71db 100755
+--- a/libgo/mksysinfo.sh
++++ b/libgo/mksysinfo.sh
+@@ -1164,20 +1164,6 @@ grep '^type _sysinfo ' gen-sysinfo.go | \
+       -e 's/mem_unit/Unit/' \
+     >> ${OUT}
+ 
+-# The ustat struct.
+-grep '^type _ustat ' gen-sysinfo.go | \
+-    sed -e 's/_ustat/Ustat_t/' \
+-      -e 's/f_tfree/Tfree/' \
+-      -e 's/f_tinode/Tinoe/' \
+-      -e 's/f_fname/Fname/' \
+-      -e 's/f_fpack/Fpack/' \
+-    >> ${OUT}
+-# Force it to be defined, as on some older GNU/Linux systems the
+-# header file fails when using with <linux/filter.h>.
+-if ! grep 'type _ustat ' gen-sysinfo.go >/dev/null 2>&1; then
+-  echo 'type Ustat_t struct { Tfree int32; Tinoe uint64; Fname [5+1]int8; Fpack [5+1]int8; }' >> ${OUT}
+-fi
+-
+ # The utimbuf struct.
+ grep '^type _utimbuf ' gen-sysinfo.go | \
+     sed -e 's/_utimbuf/Utimbuf/' \
+--- gcc-6.4.0/libgo/Makefile.am.old	2016-02-03 15:58:02.419872000 -0600
++++ gcc-6.4.0/libgo/Makefile.am	2018-06-23 02:55:45.772611885 -0500
+@@ -1,4 +1,3 @@
+-# Makefile.am -- Go library Makefile.
+ 
+ # Copyright 2009 The Go Authors. All rights reserved.
+ # Use of this source code is governed by a BSD-style
+@@ -1989,17 +1988,6 @@
+ syscall_lsf_file =
+ endif
+ 
+-# GNU/Linux specific ustat support.
+-if LIBGO_IS_LINUX
+-if LIBGO_IS_ARM64
+-syscall_ustat_file =
+-else
+-syscall_ustat_file = go/syscall/libcall_linux_ustat.go
+-endif
+-else
+-syscall_ustat_file =
+-endif
+-
+ # GNU/Linux specific utimesnano support.
+ if LIBGO_IS_LINUX
+ syscall_utimesnano_file = go/syscall/libcall_linux_utimesnano.go
+@@ -2051,7 +2039,6 @@
+ 	$(syscall_uname_file) \
+ 	$(syscall_netlink_file) \
+ 	$(syscall_lsf_file) \
+-	$(syscall_ustat_file) \
+ 	$(syscall_utimesnano_file) \
+ 	$(GO_LIBCALL_OS_FILE) \
+ 	$(GO_LIBCALL_OS_ARCH_FILE) \
+--- gcc-6.4.0/libgo/Makefile.in.old	2016-02-03 15:58:02.419872000 -0600
++++ gcc-6.4.0/libgo/Makefile.in	2018-06-23 02:56:04.842611681 -0500
+@@ -2080,11 +2080,6 @@
+ 
+ # GNU/Linux specific socket filters.
+ @LIBGO_IS_LINUX_TRUE@syscall_lsf_file = go/syscall/lsf_linux.go
+-@LIBGO_IS_ARM64_FALSE@@LIBGO_IS_LINUX_TRUE@syscall_ustat_file = go/syscall/libcall_linux_ustat.go
+-
+-# GNU/Linux specific ustat support.
+-@LIBGO_IS_ARM64_TRUE@@LIBGO_IS_LINUX_TRUE@syscall_ustat_file = 
+-@LIBGO_IS_LINUX_FALSE@syscall_ustat_file = 
+ @LIBGO_IS_LINUX_FALSE@syscall_utimesnano_file = go/syscall/libcall_posix_utimesnano.go
+ 
+ # GNU/Linux specific utimesnano support.
+@@ -2122,7 +2117,6 @@
+ 	$(syscall_uname_file) \
+ 	$(syscall_netlink_file) \
+ 	$(syscall_lsf_file) \
+-	$(syscall_ustat_file) \
+ 	$(syscall_utimesnano_file) \
+ 	$(GO_LIBCALL_OS_FILE) \
+ 	$(GO_LIBCALL_OS_ARCH_FILE) \
diff --git a/legacy/gcc6/APKBUILD b/legacy/gcc6/APKBUILD
new file mode 100644
index 000000000..6e6c8e76d
--- /dev/null
+++ b/legacy/gcc6/APKBUILD
@@ -0,0 +1,667 @@
+# Maintainer: Adelie Platform Group <adelie-devel@lists.adelielinux.org>
+_major=6
+pkgname=gcc$_major
+pkgver=6.4.0
+_ecjver=4.9
+[ "$BOOTSTRAP" = "nolibc" ] && pkgname="gcc-pass2"
+[ "$CBUILD" != "$CHOST" ] && _cross="-$CARCH" || _cross=""
+[ "$CHOST" != "$CTARGET" ] && _target="-$CTARGET_ARCH" || _target=""
+
+pkgname="$pkgname$_target"
+pkgrel=11
+pkgdesc="The GNU Compiler Collection"
+url="https://gcc.gnu.org"
+arch="all"
+license="GPL-3.0+ AND LGPL-2.1+"
+_gccrel=$pkgver-r$pkgrel
+depends="binutils$_target isl"
+makedepends_build="gcc$_cross g++$_cross bison flex texinfo zip gmp-dev mpfr-dev mpc1-dev zlib-dev"
+makedepends_host="linux-headers gmp-dev mpfr-dev mpc1-dev isl-dev zlib-dev libucontext-dev"
+subpackages=" "
+[ "$CHOST" = "$CTARGET" ] && subpackages="gcc$_major-doc$_target gcc$_major-lang$_target"
+replaces="libstdc++ binutils"
+options="$options !check !dbg strip toolchain"
+
+: ${LANG_CXX:=true}
+: ${LANG_OBJC:=true}
+: ${LANG_JAVA:=true}
+: ${LANG_GO:=true}
+: ${LANG_FORTRAN:=true}
+: ${LANG_ADA:=false}
+
+LIBGOMP=true
+LIBGCC=true
+LIBATOMIC=true
+LIBITM=true
+
+if [ "$CHOST" != "$CTARGET" ]; then
+	if [ "$BOOTSTRAP" = nolibc ]; then
+		LANG_CXX=false
+		LANG_ADA=false
+		LIBGCC=false
+		_builddir="$srcdir/build-cross-pass2"
+	else
+		_builddir="$srcdir/build-cross-final"
+	fi
+	LANG_OBJC=false
+	LANG_JAVA=false
+	LANG_GO=false
+	LANG_FORTRAN=false
+	LIBGOMP=false
+	LIBATOMIC=false
+	LIBITM=false
+
+	# reset target flags (should be set in crosscreate abuild)
+	# fixup flags. seems gcc treats CPPFLAGS as global without
+	# _FOR_xxx variants. wrap it in CFLAGS and CXXFLAGS.
+	export CFLAGS="$CPPFLAGS $CFLAGS"
+	export CXXFLAGS="$CPPFLAGS $CXXFLAGS"
+	unset CPPFLAGS
+	export CFLAGS_FOR_TARGET=" "
+	export CXXFLAGS_FOR_TARGET=" "
+	export LDFLAGS_FOR_TARGET=" "
+
+	STRIP_FOR_TARGET="$CTARGET-strip"
+elif [ "$CBUILD" != "$CHOST" ]; then
+	# fixup flags. seems gcc treats CPPFLAGS as global without
+	# _FOR_xxx variants. wrap it in CFLAGS and CXXFLAGS.
+	export CFLAGS="$CPPFLAGS $CFLAGS"
+	export CXXFLAGS="$CPPFLAGS $CXXFLAGS"
+	unset CPPFLAGS
+
+	# reset flags and cc for build
+	export CC_FOR_BUILD="gcc"
+	export CXX_FOR_BUILD="g++"
+	export CFLAGS_FOR_BUILD=" "
+	export CXXFLAGS_FOR_BUILD=" "
+	export LDFLAGS_FOR_BUILD=" "
+	export CFLAGS_FOR_TARGET=" "
+	export CXXFLAGS_FOR_TARGET=" "
+	export LDFLAGS_FOR_TARGET=" "
+
+	# Languages that do not need bootstrapping
+	LANG_OBJC=false
+	LANG_JAVA=false
+	LANG_GO=false
+	LANG_FORTRAN=false
+
+	STRIP_FOR_TARGET=${CROSS_COMPILE}strip
+	_builddir="$srcdir/build-cross-native"
+else
+	STRIP_FOR_TARGET=${CROSS_COMPILE}strip
+	_builddir="$srcdir/build"
+fi
+
+# libitm has TEXTRELs in ARM build, so disable for now
+# gcc itself has TEXTRELs in m68k; until this is fixed, we need it
+case "$CTARGET_ARCH" in
+arm*)		LIBITM=false ;;
+m68k)		options="$options textrels" ;;
+esac
+
+# Fortran uses libquadmath if toolchain has __float128
+# currently on x86, x86_64 and ia64
+LIBQUADMATH=$LANG_FORTRAN
+case "$CTARGET_ARCH" in
+pmmx | x86 | x86_64)	LIBQUADMATH=$LANG_FORTRAN ;;
+*)			LIBQUADMATH=false ;;
+esac
+
+# libatomic is a dependency for openvswitch
+$LIBATOMIC && subpackages="$subpackages libatomic$_major::$CTARGET_ARCH"
+$LIBGCC && subpackages="$subpackages libgcc$_major::$CTARGET_ARCH"
+$LIBQUADMATH && subpackages="$subpackages libquadmath$_major::$CTARGET_ARCH"
+if $LIBGOMP; then
+	depends="$depends libgomp=$_gccrel"
+	subpackages="$subpackages libgomp$_major::$CTARGET_ARCH"
+fi
+
+_languages=c
+if $LANG_CXX; then
+	subpackages="$subpackages libstdc++:libcxx:$CTARGET_ARCH g++$_target:gpp"
+	_languages="$_languages,c++"
+fi
+if $LANG_OBJC; then
+	subpackages="$subpackages libobjc::$CTARGET_ARCH gcc-objc$_target:objc"
+	_languages="$_languages,objc"
+fi
+if $LANG_JAVA; then
+	subpackages="$subpackages libgcj::$CTARGET_ARCH gcc-java$_target:java"
+	_languages="$_languages,java"
+fi
+if $LANG_GO; then
+	subpackages="$subpackages libgo::$CTARGET_ARCH gcc-go$_target:go"
+	_languages="$_languages,go"
+fi
+if $LANG_FORTRAN; then
+	subpackages="$subpackages libgfortran::$CTARGET_ARCH gfortran$_target:gfortran"
+	_languages="$_languages,fortran"
+fi
+if $LANG_ADA; then
+	subpackages="$subpackages libgnat::$CTARGET_ARCH gcc-gnat$_target:gnat"
+	_languages="$_languages,ada"
+	makedepends_build="$makedepends_build gcc-gnat gcc-gnat$_cross"
+fi
+makedepends="$makedepends_build $makedepends_host"
+
+source="https://ftp.gnu.org/gnu/gcc/gcc-$pkgver/gcc-$pkgver.tar.xz
+	https://sourceware.org/pub/java/ecj-$_ecjver.jar
+
+	001_all_default-ssp-strong.patch
+	002_all_default-relro.patch
+	003_all_default-fortify-source.patch
+	005_all_default-as-needed.patch
+	011_all_default-warn-format-security.patch
+	012_all_default-warn-trampolines.patch
+	020_all_msgfmt-libstdc++-link.patch
+	050_all_libiberty-asprintf.patch
+	051_all_libiberty-pic.patch
+	053_all_libitm-no-fortify-source.patch
+	067_all_gcc-poison-system-directories.patch
+	090_all_pr55930-dependency-tracking.patch
+
+	201-cilkrts.patch
+	203-libgcc_s.patch
+	204-linux_libc_has_function.patch
+	205-nopie.patch
+	207-static-pie.patch
+
+	libgcc-always-build-gcceh.a.patch
+	gcc-4.9-musl-fortify.patch
+	gcc-6.1-musl-libssp.patch
+	boehm-gc-musl.patch
+	gcc-pure64.patch
+	fix-gcj-stdgnu14-link.patch
+	fix-gcj-musl.patch
+	fix-gcj-iconv-musl.patch
+
+	gcc-4.8-build-args.patch
+	fix-cxxflags-passing.patch
+	ada-fixes.patch
+	ada-shared.patch
+	ada-musl.patch
+	ada-aarch64-multiarch.patch
+
+	300-main-gcc-add-musl-s390x-dynamic-linker.patch
+	310-build-gcj-s390x.patch
+	320-libffi-gnulinux.patch
+	330-gccgo-link-to-ucontext.patch
+	331-gccgo-use-real-off_t-type.patch
+	332-gccgo-remove-ustat.patch
+	libgo-musl-1.2.3.patch
+
+	fix-rs6000-pie.patch
+	add-classic_table-support.patch
+	lra-pentium.patch
+
+	gcc-5.4.0-locale.patch
+	isl-fix.patch
+	"
+
+# we build out-of-tree
+_gccdir="$srcdir"/gcc-$pkgver
+_gcclibdir=/usr/lib/gcc/${CTARGET}/$pkgver
+_gcclibexec=/usr/libexec/gcc/${CTARGET}/$pkgver
+
+prepare() {
+	cd "$_gccdir"
+
+	_err=
+	for i in $source; do
+		case "$i" in
+		*.patch)
+			msg "Applying $i"
+			patch -p1 -F3 -i "$srcdir"/$i || _err="$_err $i"
+			;;
+		esac
+	done
+
+	if [ -n "$_err" ]; then
+		error "The following patches failed:"
+		for i in $_err; do
+			echo "  $i"
+		done
+		return 1
+	fi
+
+	# see http://gcc.gnu.org/ml/java/2008-04/msg00027.html
+	mv "$srcdir"/ecj-*.jar ecj.jar
+
+	echo ${pkgver} > gcc/BASE-VER
+	echo "UNSUPPORTED=1" > libcilkrts/configure.tgt
+	rm libgo/go/syscall/libcall_linux_ustat.go
+}
+
+build() {
+	local _arch_configure=
+	local _libc_configure=
+	local _cross_configure=
+	local _bootstrap_configure=
+	local _hash_style=gnu
+	local _symvers=
+
+	cd "$_gccdir"
+
+	case "$CTARGET" in
+	aarch64-*-*-*)		_arch_configure="--with-arch=armv8-a --with-abi=lp64 --enable-fix-cortex-a53-835769 --enable-fix-cortex-a53-843419";;
+	armv5-*-*-*eabi)	_arch_configure="--with-arch=armv5te --with-tune=arm926ej-s --with-float=soft --with-abi=aapcs-linux";;
+	armv6-*-*-*eabihf)	_arch_configure="--with-arch=armv6zk --with-tune=arm1176jzf-s --with-fpu=vfp --with-float=hard --with-abi=aapcs-linux";;
+	armv7-*-*-*eabihf)	_arch_configure="--with-arch=armv7-a --with-tune=generic-armv7-a --with-fpu=vfpv3-d16 --with-float=hard --with-abi=aapcs-linux --with-mode=thumb";;
+	m68k-*-*-*)		_arch_configure="--with-arch=68020 --with-tune=68020-40";;
+	mipsel-*-*-*)		_arch_configure="--with-arch-32=mips2 --with-tune-32=mips32 --with-fp-32=32 --with-mips-plt --with-float=hard --with-abi=32";;
+	mips-*-*-*)		_arch_configure="--with-arch=mips3 --with-mips-plt --with-abi=32"; _hash_style="sysv";;
+	mips32el-*-*-*)		_arch_configure="--with-arch=mips32 --with-mips-plt --with-abi=32"; _hash_style="sysv";;
+	powerpc-*-*-*)		_arch_configure="--enable-secureplt --enable-decimal-float=no";;
+	powerpc64*-*-*-*)	_arch_configure="--with-abi=elfv2 --enable-secureplt --enable-decimal-float=no";;
+	powerpc64le*-*-*-*)	_arch_configure="--with-abi=elfv2 --enable-secureplt --enable-decimal-float=no";;
+	i486-*-*-*)		_arch_configure="--with-arch=i486 --with-tune=generic --enable-cld";;
+	i586-*-*-*)		_arch_configure="--with-arch=i586 --with-tune=pentium2 --enable-cld --enable-mmx";;
+	pentium3-*-*-*)		_arch_configure="--with-arch=pentium3 --with-tune=pentium-m";;
+	s390x-*-*-*)		_arch_configure="--with-arch=z196 --with-tune=zEC12 --with-zarch --with-long-double-128 --enable-decimal-float";;
+	esac
+
+	case "$CTARGET_LIBC" in
+	musl)
+		# musl does not support mudflap, or libsanitizer
+		# libmpx uses secure_getenv and struct _libc_fpstate not present in musl
+		_libc_configure="--disable-libmpx --disable-libmudflap --disable-libsanitizer"
+		_symvers="--disable-symvers"
+		export libat_cv_have_ifunc=no
+		export ac_cv_type_off64_t=no
+		;;
+	esac
+
+	[ "$CBUILD" != "$CHOST"   ] && _cross_configure="--disable-bootstrap"
+	[ "$CHOST"  != "$CTARGET" ] && _cross_configure="--disable-bootstrap --with-sysroot=$CBUILDROOT"
+
+	case "$BOOTSTRAP" in
+	nolibc)	_bootstrap_configure="--with-newlib --disable-shared --enable-threads=no" ;;
+	*)	_bootstrap_configure="--enable-shared --enable-threads --enable-tls" ;;
+	esac
+
+	$LIBGOMP	|| _bootstrap_configure="$_bootstrap_configure --disable-libgomp"
+	$LIBATOMIC	|| _bootstrap_configure="$_bootstrap_configure --disable-libatomic"
+	$LIBITM		|| _bootstrap_configure="$_bootstrap_configure --disable-libitm"
+	$LIBQUADMATH	|| _arch_configure="$_arch_configure --disable-libquadmath"
+
+	msg "Building the following:"
+	echo ""
+	echo "  CBUILD=$CBUILD"
+	echo "  CHOST=$CHOST"
+	echo "  CTARGET=$CTARGET"
+	echo "  CTARGET_ARCH=$CTARGET_ARCH"
+	echo "  CTARGET_LIBC=$CTARGET_LIBC"
+	echo "  languages=$_languages"
+	echo "  arch_configure=$_arch_configure"
+	echo "  libc_configure=$_libc_configure"
+	echo "  cross_configure=$_cross_configure"
+	echo "  bootstrap_configure=$_bootstrap_configure"
+	echo "  hash_style=$_hash_style"
+	echo ""
+
+	mkdir -p "$_builddir"
+	cd "$_builddir"
+	"$_gccdir"/configure --prefix=/usr \
+		--mandir=/usr/share/man \
+		--infodir=/usr/share/info \
+		--build=${CBUILD} \
+		--host=${CHOST} \
+		--target=${CTARGET} \
+		--with-pkgversion="Adelie ${pkgver}" \
+		--with-bugurl="http://bts.adelielinux.org/" \
+		--enable-checking=release \
+		--disable-fixed-point \
+		--disable-libstdcxx-pch \
+		--disable-multilib \
+		--disable-werror \
+		$_symvers \
+		--enable-__cxa_atexit \
+		--enable-default-pie \
+		--enable-cloog-backend \
+		--enable-languages=$_languages \
+		$_arch_configure \
+		$_libc_configure \
+		$_cross_configure \
+		$_bootstrap_configure \
+		--with-system-zlib \
+		--with-linker-hash-style=$_hash_style
+	make
+}
+
+check() {
+	cd "$_builddir"
+	make check
+}
+
+package() {
+	cd "$_builddir"
+	make -j1 DESTDIR="${pkgdir}" install
+
+	ln -s gcc "$pkgdir"/usr/bin/cc
+
+	# we dont support gcj -static
+	# and saving 35MB is not bad.
+	find "$pkgdir" -name libgcj.a -o -name libgtkpeer.a \
+		-o -name libgjsmalsa.a -o -name libgcj-tools.a \
+		-o -name libjvm.a -o -name libgij.a -o -name libgcj_bc.a \
+		-o -name libjavamath.a \
+		| xargs rm -f
+
+	# strip debug info from some static libs
+	${STRIP_FOR_TARGET} -g `find "$pkgdir" \( -name libgfortran.a -o -name libobjc.a -o -name libgomp.a \
+		-o -name libmudflap.a -o -name libmudflapth.a \
+		-o -name libgcc.a -o -name libgcov.a -o -name libquadmath.a \
+		-o -name libitm.a -o -name libgo.a -o -name libcaf\*.a \
+		-o -name libatomic.a -o -name libasan.a -o -name libtsan.a \) \
+		-a -type f`
+
+	if $LANG_JAVA; then
+		sed -i -e 's/lib: /&%{static:%eJava programs cannot be linked statically}/' \
+			"$pkgdir"/usr/lib/libgcj.spec
+	fi
+
+	if $LIBGOMP; then
+		mv "$pkgdir"/usr/lib/libgomp.spec "$pkgdir"/$_gcclibdir
+	fi
+	if $LIBITM; then
+		mv "$pkgdir"/usr/lib/libitm.spec "$pkgdir"/$_gcclibdir
+	fi
+
+	# remove ffi
+	rm -f "$pkgdir"/usr/lib/libffi* "$pkgdir"/usr/share/man/man3/ffi*
+	find "$pkgdir" -name 'ffi*.h' | xargs rm -f
+
+	local gdblib=${_target:+$CTARGET/}lib
+	for i in $(find "$pkgdir"/usr/$gdblib/ -type f -maxdepth 1 -name "*-gdb.py" ); do
+		mkdir -p "$pkgdir"/usr/share/gdb/python/auto-load/usr/$gdblib
+		mv "$i" "$pkgdir"/usr/share/gdb/python/auto-load/usr/$gdblib/
+	done
+
+	# move ada runtime libs
+	if $LANG_ADA; then
+		for i in $(find "$pkgdir"/$_gcclibdir/adalib/ -type f -maxdepth 1 -name "libgna*.so"); do
+			mv "$i" "$pkgdir"/usr/lib/
+			ln -s ../../../../${i##*/} $i
+		done
+	fi
+
+	if [ "$CHOST" != "$CTARGET" ]; then
+		# cross-gcc: remove any files that would conflict with the
+		# native gcc package
+		rm -rf "$pkgdir"/usr/bin/cc "$pkgdir"/usr/include "$pkgdir"/usr/share
+		# libcc1 does not depend on target, don't ship it
+		rm -rf "$pkgdir"/usr/lib/libcc1.so*
+
+		# fixup gcc library symlinks to be linker scripts so
+		# linker finds the libs from relocated sysroot
+		for so in "$pkgdir"/usr/$CTARGET/lib/*.so; do
+			if [ -h "$so" ]; then
+				local _real=$(basename $(readlink "$so"))
+				rm -f "$so"
+				echo "GROUP ($_real)" > "$so"
+			fi
+		done
+	fi
+}
+
+libatomic() {
+	pkgdesc="GCC Atomic library"
+	depends=
+	replaces="gcc"
+
+	mkdir -p "$subpkgdir"/usr/lib
+	mv "$pkgdir"/usr/${_target:+$CTARGET/}lib/libatomic.so.* "$subpkgdir"/usr/lib/
+}
+
+libcxx() {
+	pkgdesc="GNU C++ standard runtime library"
+	depends=
+
+	mkdir -p "$subpkgdir"/usr/lib
+	mv "$pkgdir"/usr/${_target:+$CTARGET/}lib/libstdc++.so.* "$subpkgdir"/usr/lib/
+}
+
+gpp() {
+	pkgdesc="GNU C++ standard library and compiler"
+	depends="libstdc++=$_gccrel gcc=$_gccrel libc-dev"
+	mkdir -p "$subpkgdir/$_gcclibexec" \
+		"$subpkgdir"/usr/bin \
+		"$subpkgdir"/usr/${_target:+$CTARGET/}include \
+		"$subpkgdir"/usr/${_target:+$CTARGET/}lib \
+
+	mv "$pkgdir/$_gcclibexec/cc1plus" "$subpkgdir/$_gcclibexec/"
+
+	mv "$pkgdir"/usr/${_target:+$CTARGET/}lib/*++* "$subpkgdir"/usr/${_target:+$CTARGET/}lib/
+	mv "$pkgdir"/usr/${_target:+$CTARGET/}include/c++ "$subpkgdir"/usr/${_target:+$CTARGET/}include/
+	mv "$pkgdir"/usr/bin/*++ "$subpkgdir"/usr/bin/
+}
+
+libobjc() {
+	pkgdesc="GNU Objective-C runtime"
+	replaces="objc"
+	depends=
+	mkdir -p "$subpkgdir"/usr/lib
+	mv "$pkgdir"/usr/${_target:+$CTARGET/}lib/libobjc.so.* "$subpkgdir"/usr/lib/
+}
+
+objc() {
+	pkgdesc="GNU Objective-C"
+	replaces="gcc"
+	depends="libc-dev gcc=$_gccrel libobjc=$_gccrel"
+
+	mkdir -p "$subpkgdir"/$_gcclibdir/include \
+		"$subpkgdir"/usr/lib
+	mv "$pkgdir"/$_gcclibdir/include/objc "$subpkgdir"/$_gcclibdir/include/
+	mv "$pkgdir"/usr/lib/libobjc.so "$pkgdir"/usr/lib/libobjc.a \
+		"$subpkgdir"/usr/lib/
+}
+
+libgcc() {
+	pkgdesc="GNU C compiler runtime libraries"
+	depends=
+
+	mkdir -p "$subpkgdir"/usr/lib
+	mv "$pkgdir"/usr/${_target:+$CTARGET/}lib/libgcc_s.so.* "$subpkgdir"/usr/lib/
+}
+
+libgomp() {
+	pkgdesc="GCC shared-memory parallel programming API library"
+	depends=
+	replaces="gcc"
+
+	mkdir -p "$subpkgdir"/usr/lib
+	mv "$pkgdir"/usr/${_target:+$CTARGET/}lib/libgomp.so.* "$subpkgdir"/usr/lib/
+}
+
+java() {
+	pkgdesc="Java support for GCC"
+	depends="zlib-dev gcc=$_gccrel libgcj=$_gccrel"
+
+	mkdir -p "$subpkgdir"/usr/bin "$subpkgdir"/usr/lib "$subpkgdir"/$_gcclibdir/
+	cd "$pkgdir"/usr/bin
+	mv *gcj *gcj-dbtool *gjavah *gcjh *jcf-dump "$subpkgdir"/usr/bin/
+	cd "$pkgdir"
+	for i in $(find usr/ -name ecj1 -o -name jc1 -o -name jvgenmain); do
+		mkdir -p "$subpkgdir"/${i%/*}
+		mv "$pkgdir"/$i "$subpkgdir"/$i
+	done
+	for i in "$pkgdir"/usr/lib/libgcj*.so; do
+		if [ -L "$i" ]; then
+			mv "$i" "$subpkgdir"/usr/lib/
+		fi
+	done
+	mkdir -p "$subpkgdir"/usr/share/gcc-6.4.0/python
+	mv "$pkgdir"/usr/share/gcc-6.4.0/python/libjava \
+		"$subpkgdir"/usr/share/gcc-6.4.0/python
+	mv "$pkgdir"/usr/lib/libgij.so "$subpkgdir"/usr/lib/
+	mv "$pkgdir"/usr/lib/libgcj.spec "$subpkgdir"/$_gcclibdir/
+}
+
+libgcj() {
+	pkgdesc="Java runtime library for gcc"
+	# libgcj_bc.so moved from gcc-java to libgcj
+	replaces="gcc-java"
+	depends=
+
+	mkdir -p "$subpkgdir"/usr/bin
+	cd "$pkgdir"/usr/bin
+	mv aot-compile gappletviewer gc-analyze gij gjar gjarsigner gkeytool\
+		gnative2ascii gorbd grmic grmid grmiregistry gserialver \
+		gtnameserv jv-convert rebuild-gcj-db \
+		"$subpkgdir"/usr/bin/
+	cd "$pkgdir"
+	for i in $(find usr/lib -name jc1 -o -name jvgenmain); do
+		mkdir -p "$subpkgdir"/${i%/*}
+		mv "$pkgdir"/$i "$subpkgdir"/$i
+	done
+	mkdir -p "$subpkgdir"/usr/lib
+	mv "$pkgdir"/usr/lib/gcj-* \
+		"$pkgdir"/usr/lib/libgcj_bc.so \
+		"$pkgdir"/usr/lib/libgcj*.so.* \
+		"$pkgdir"/usr/lib/libgij.so.* \
+		"$pkgdir"/usr/lib/logging.properties \
+		"$pkgdir"/usr/lib/security \
+		"$subpkgdir"/usr/lib/
+
+	mkdir -p "$subpkgdir"/usr/lib/pkgconfig
+	mv "$pkgdir"/usr/lib/pkgconfig/libgcj* "$subpkgdir"/usr/lib/pkgconfig/
+
+	mkdir -p "$subpkgdir"/usr/share/
+	mv "$pkgdir"/usr/share/java "$subpkgdir"/usr/share/
+}
+
+libgo() {
+	pkgdesc="Go runtime library for GCC"
+	depends=
+
+	mkdir -p "$subpkgdir"/usr/lib
+	mv "$pkgdir"/usr/lib/libgo.so.* "$subpkgdir"/usr/lib/
+}
+
+go() {
+	pkgdesc="Go support for GCC"
+	depends="gcc=$_gccrel libgo=$_gccrel"
+
+	mkdir -p "$subpkgdir"/$_gcclibexec \
+		"$subpkgdir"/usr/lib \
+		"$subpkgdir"/usr/bin
+	mv "$pkgdir"/usr/lib/go "$subpkgdir"/usr/lib/
+	mv "$pkgdir"/usr/bin/*gccgo "$subpkgdir"/usr/bin/
+	mv "$pkgdir"/usr/bin/*go "$subpkgdir"/usr/bin
+	mv "$pkgdir"/usr/bin/*gofmt "$subpkgdir"/usr/bin
+	mv "$pkgdir"/$_gcclibexec/go1 "$subpkgdir"/$_gcclibexec/
+	mv "$pkgdir"/$_gcclibexec/cgo "$subpkgdir"/$_gcclibexec/
+	mv "$pkgdir"/usr/lib/libgo.a \
+		"$pkgdir"/usr/lib/libgo.so \
+		"$pkgdir"/usr/lib/libgobegin.a \
+		"$pkgdir"/usr/lib/libgolibbegin.a \
+		"$pkgdir"/usr/lib/libnetgo.a \
+		"$subpkgdir"/usr/lib/
+}
+
+libgfortran() {
+	pkgdesc="Fortran runtime library for GCC"
+	depends=
+
+	mkdir -p "$subpkgdir"/usr/lib
+	mv "$pkgdir"/usr/lib/libgfortran.so.* "$subpkgdir"/usr/lib/
+}
+
+libquadmath() {
+	replaces="gcc"
+	pkgdesc="128-bit math library for GCC"
+	depends=
+
+	mkdir -p "$subpkgdir"/usr/lib
+	mv "$pkgdir"/usr/lib/libquadmath.so.* "$subpkgdir"/usr/lib/
+}
+
+gfortran() {
+	pkgdesc="GNU Fortran Compiler"
+	depends="gcc=$_gccrel libgfortran=$_gccrel"
+	$LIBQUADMATH && depends="$depends libquadmath=$_gccrel"
+	replaces="gcc"
+
+	mkdir -p "$subpkgdir"/$_gcclibexec \
+		"$subpkgdir"/$_gcclibdir \
+		"$subpkgdir"/usr/lib \
+		"$subpkgdir"/usr/bin
+	mv "$pkgdir"/usr/bin/*gfortran "$subpkgdir"/usr/bin/
+	mv "$pkgdir"/usr/lib/libgfortran.a \
+		"$pkgdir"/usr/lib/libgfortran.so \
+		"$subpkgdir"/usr/lib/
+	if $LIBQUADMATH; then
+		mv "$pkgdir"/usr/lib/libquadmath.a \
+			"$pkgdir"/usr/lib/libquadmath.so \
+			"$subpkgdir"/usr/lib/
+	fi
+	mv "$pkgdir"/$_gcclibexec/f951 "$subpkgdir"/$_gcclibexec
+	mv "$pkgdir"/usr/lib/libgfortran.spec "$subpkgdir"/$_gcclibdir
+}
+
+libgnat() {
+	pkgdesc="GNU Ada runtime shared libraries"
+	depends=
+
+	mkdir -p "$subpkgdir"/usr/lib
+	mv "$pkgdir"/usr/lib/libgna*.so "$subpkgdir"/usr/lib/
+}
+
+gnat() {
+	pkgdesc="Ada support for GCC"
+	depends="gcc=$_gccrel"
+	[ "$CHOST" = "$CTARGET" ] && depends="$depends libgnat=$_gccrel"
+
+	mkdir -p "$subpkgdir"/$_gcclibexec \
+		"$subpkgdir"/$_gcclibdir \
+		"$subpkgdir"/usr/bin
+	mv "$pkgdir"/$_gcclibexec/*gnat* "$subpkgdir"/$_gcclibexec/
+	mv "$pkgdir"/$_gcclibdir/*ada* "$subpkgdir"/$_gcclibdir/
+	mv "$pkgdir"/usr/bin/*gnat* "$subpkgdir"/usr/bin/
+}
+
+sha512sums="02c60e54527c7adf584798d5251f8a0b80c93d5deafce82501b2c28e6692e0bd783927bbfc4bc527a863c0cccc025150a34740a9e29badb02d4b48e56a8aba90  gcc-6.4.0.tar.xz
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+4e1b421ed72668b66ecbcb0a34afa99d2a34cb2ea9ee51c4aad605fc8a0e94e3bfbabae4ebe236efc5ec86fc01a472cbe93f36fe25cf579714939d8102a9b84a  lra-pentium.patch
+67a75a94fdba69de96b98dbc2978a50cb197857c464b81f7c956176da7066b3be937e40cb15e0870fc1e7382d662c5101bcd18cf457fc4112de41802042b51c4  gcc-5.4.0-locale.patch
+ca9e2747fc0ed5b5c35a7df6ae48482855c2663882b5e7a86e65efa5910b3be77380361fe21668718a3e68f6362306a440fa86bff6c50b4d92d6c75ce65a47e8  isl-fix.patch"
diff --git a/legacy/gcc6/ada-aarch64-multiarch.patch b/legacy/gcc6/ada-aarch64-multiarch.patch
new file mode 100644
index 000000000..ac60b6f6a
--- /dev/null
+++ b/legacy/gcc6/ada-aarch64-multiarch.patch
@@ -0,0 +1,16 @@
+--- gcc-6.4.0/gcc/ada/gcc-interface/Makefile.in.orig
++++ gcc-6.4.0/gcc/ada/gcc-interface/Makefile.in
+@@ -2042,13 +2042,8 @@
+   system.ads<system-linux-x86_64.ads
+   ## ^^ Note the above is a pretty-close placeholder.
+ 
+-  ifneq (,$(or $(filter aarch64-linux-gnu, $(shell $(GCC_FOR_TARGET) $(GNATLIBCFLAGS) -print-multiarch)), $(filter ../lib64, $(shell $(GCC_FOR_TARGET) $(GNATLIBCFLAGS) -print-multi-os-directory))))
+     LIBGNAT_TARGET_PAIRS = \
+     $(LIBGNAT_TARGET_PAIRS_COMMON) $(LIBGNAT_TARGET_PAIRS_64)
+-  else
+-    LIBGNAT_TARGET_PAIRS = \
+-    $(LIBGNAT_TARGET_PAIRS_COMMON) $(LIBGNAT_TARGET_PAIRS_32)
+-  endif
+ 
+   TOOLS_TARGET_PAIRS =  \
+     mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb \
diff --git a/legacy/gcc6/ada-fixes.patch b/legacy/gcc6/ada-fixes.patch
new file mode 100644
index 000000000..ba4ea42b4
--- /dev/null
+++ b/legacy/gcc6/ada-fixes.patch
@@ -0,0 +1,35 @@
+--- gcc-6.1.0.orig/gcc/ada/cal.c
++++ gcc-6.1.0/gcc/ada/cal.c
+@@ -49,6 +49,7 @@
+ #include <time.h>
+ #else
+ #include <sys/time.h>
++#include <time.h>
+ #endif
+ 
+ #ifdef __MINGW32__
+--- gcc-6.1.0.orig/gcc/ada/terminals.c
++++ gcc-6.1.0/gcc/ada/terminals.c
+@@ -1068,13 +1068,6 @@
+ #include <stdio.h>
+ #include <stdlib.h>
+ 
+-/* On some system termio is either absent or including it will disable termios
+-   (HP-UX) */
+-#if !defined (__hpux__) && !defined (BSD) && !defined (__APPLE__) \
+-  && !defined (__rtems__)
+-#   include <termio.h>
+-#endif
+-
+ #include <sys/ioctl.h>
+ #include <termios.h>
+ #include <fcntl.h>
+@@ -1169,7 +1162,7 @@
+    char *slave_name = NULL;
+ 
+ #ifdef USE_GETPT
+-  master_fd = getpt ();
++  master_fd = posix_openpt (O_RDWR);
+ #elif defined (USE_OPENPTY)
+   status = openpty (&master_fd, &slave_fd, NULL, NULL, NULL);
+ #elif defined (USE_CLONE_DEVICE)
diff --git a/legacy/gcc6/ada-musl.patch b/legacy/gcc6/ada-musl.patch
new file mode 100644
index 000000000..464c3d57d
--- /dev/null
+++ b/legacy/gcc6/ada-musl.patch
@@ -0,0 +1,137 @@
+diff -rup gcc-5.1.0/gcc.orig/ada/adaint.c gcc-5.1.0/gcc/ada/adaint.c
+--- gcc-5.1.0/gcc.orig/ada/adaint.c	2015-02-20 11:48:57.000000000 +0000
++++ gcc-5.1.0/gcc/ada/adaint.c	2015-06-02 10:47:51.672767476 +0000
+@@ -70,6 +70,11 @@
+ #include <sys/param.h>
+ #include <sys/pstat.h>
+ #endif
++ 
++#if defined (linux)
++#define _GNU_SOURCE 1
++#include <sched.h>
++#endif
+ 
+ #ifdef __PikeOS__
+ #define __BSD_VISIBLE 1
+@@ -3057,8 +3062,6 @@ __gnat_lwp_self (void)
+    return (void *) syscall (__NR_gettid);
+ }
+ 
+-#include <sched.h>
+-
+ /* glibc versions earlier than 2.7 do not define the routines to handle
+    dynamically allocated CPU sets. For these targets, we use the static
+    versions. */
+@@ -3067,7 +3070,7 @@ __gnat_lwp_self (void)
+ 
+ /* Dynamic cpu sets */
+ 
+-cpu_set_t *
++void *
+ __gnat_cpu_alloc (size_t count)
+ {
+   return CPU_ALLOC (count);
+@@ -3080,33 +3083,33 @@ __gnat_cpu_alloc_size (size_t count)
+ }
+ 
+ void
+-__gnat_cpu_free (cpu_set_t *set)
++__gnat_cpu_free (void *set)
+ {
+-  CPU_FREE (set);
++  CPU_FREE ((cpu_set_t *) set);
+ }
+ 
+ void
+-__gnat_cpu_zero (size_t count, cpu_set_t *set)
++__gnat_cpu_zero (size_t count, void *set)
+ {
+-  CPU_ZERO_S (count, set);
++  CPU_ZERO_S (count, (cpu_set_t *) set);
+ }
+ 
+ void
+-__gnat_cpu_set (int cpu, size_t count, cpu_set_t *set)
++__gnat_cpu_set (int cpu, size_t count, void *set)
+ {
+   /* Ada handles CPU numbers starting from 1, while C identifies the first
+      CPU by a 0, so we need to adjust. */
+-  CPU_SET_S (cpu - 1, count, set);
++  CPU_SET_S (cpu - 1, count, (cpu_set_t *) set);
+ }
+ 
+ #else /* !CPU_ALLOC */
+ 
+ /* Static cpu sets */
+ 
+-cpu_set_t *
++void *
+ __gnat_cpu_alloc (size_t count ATTRIBUTE_UNUSED)
+ {
+-  return (cpu_set_t *) xmalloc (sizeof (cpu_set_t));
++  return xmalloc (sizeof (cpu_set_t));
+ }
+ 
+ size_t
+@@ -3116,23 +3119,23 @@ __gnat_cpu_alloc_size (size_t count ATTR
+ }
+ 
+ void
+-__gnat_cpu_free (cpu_set_t *set)
++__gnat_cpu_free (void *set)
+ {
+   free (set);
+ }
+ 
+ void
+-__gnat_cpu_zero (size_t count ATTRIBUTE_UNUSED, cpu_set_t *set)
++__gnat_cpu_zero (size_t count ATTRIBUTE_UNUSED, void *set)
+ {
+-  CPU_ZERO (set);
++  CPU_ZERO ((cpu_set_t *) set);
+ }
+ 
+ void
+-__gnat_cpu_set (int cpu, size_t count ATTRIBUTE_UNUSED, cpu_set_t *set)
++__gnat_cpu_set (int cpu, size_t count ATTRIBUTE_UNUSED, void *set)
+ {
+   /* Ada handles CPU numbers starting from 1, while C identifies the first
+      CPU by a 0, so we need to adjust. */
+-  CPU_SET (cpu - 1, set);
++  CPU_SET (cpu - 1, (cpu_set_t *) set);
+ }
+ #endif /* !CPU_ALLOC */
+ #endif /* linux */
+diff -rup gcc-5.1.0/gcc.orig/ada/adaint.h gcc-5.1.0/gcc/ada/adaint.h
+--- gcc-5.1.0/gcc.orig/ada/adaint.h	2015-01-27 17:20:27.000000000 +0000
++++ gcc-5.1.0/gcc/ada/adaint.h	2015-06-02 10:47:23.188910894 +0000
+@@ -287,13 +287,11 @@ extern void   *__gnat_lwp_self			   (voi
+ 
+ /* Routines for interface to required CPU set primitives */
+ 
+-#include <sched.h>
+-
+-extern cpu_set_t *__gnat_cpu_alloc                 (size_t);
++extern void * __gnat_cpu_alloc                 (size_t);
+ extern size_t __gnat_cpu_alloc_size                (size_t);
+-extern void   __gnat_cpu_free                  (cpu_set_t *);
+-extern void   __gnat_cpu_zero                      (size_t, cpu_set_t *);
+-extern void   __gnat_cpu_set                       (int, size_t, cpu_set_t *);
++extern void   __gnat_cpu_free                  (void *);
++extern void   __gnat_cpu_zero                      (size_t, void *);
++extern void   __gnat_cpu_set                       (int, size_t, void *);
+ #endif
+ 
+ #if defined (_WIN32)
+diff -rup gcc-5.1.0/gcc.orig/ada/gcc-interface/Makefile.in gcc-5.1.0/gcc/ada/gcc-interface/Makefile.in
+--- gcc-5.1.0/gcc.orig/ada/gcc-interface/Makefile.in	2015-04-09 20:29:28.000000000 +0000
++++ gcc-5.1.0/gcc/ada/gcc-interface/Makefile.in	2015-06-02 10:47:23.188910894 +0000
+@@ -1910,7 +1910,7 @@ ifeq ($(strip $(filter-out powerpc% linu
+ endif
+ 
+ # ARM linux, GNU eabi
+-ifeq ($(strip $(filter-out arm% linux-gnueabi%,$(target_cpu) $(target_os))),)
++ifeq ($(strip $(filter-out arm% linux-gnueabi% linux-musleabi% linux-muslgnueabi%,$(target_cpu) $(target_os))),)
+   LIBGNAT_TARGET_PAIRS = \
+   a-intnam.ads<a-intnam-linux.ads \
+   s-inmaop.adb<s-inmaop-posix.adb \
diff --git a/legacy/gcc6/ada-shared.patch b/legacy/gcc6/ada-shared.patch
new file mode 100644
index 000000000..6f1c16aff
--- /dev/null
+++ b/legacy/gcc6/ada-shared.patch
@@ -0,0 +1,30 @@
+Index: b/gcc/ada/link.c
+===================================================================
+--- a/gcc/ada/link.c
++++ b/gcc/ada/link.c
+@@ -105,9 +105,9 @@
+ 
+ #elif defined (__FreeBSD__)
+ const char *__gnat_object_file_option = "-Wl,@";
+-const char *__gnat_run_path_option = "-Wl,-rpath,";
+-char __gnat_shared_libgnat_default = STATIC;
+-char __gnat_shared_libgcc_default = STATIC;
++const char *__gnat_run_path_option = "";
++char __gnat_shared_libgnat_default = SHARED;
++char __gnat_shared_libgcc_default = SHARED;
+ int __gnat_link_max = 8192;
+ unsigned char __gnat_objlist_file_supported = 1;
+ const char *__gnat_object_library_extension = ".a";
+@@ -127,9 +127,9 @@
+ 
+ #elif defined (linux) || defined(__GLIBC__)
+ const char *__gnat_object_file_option = "-Wl,@";
+-const char *__gnat_run_path_option = "-Wl,-rpath,";
+-char __gnat_shared_libgnat_default = STATIC;
+-char __gnat_shared_libgcc_default = STATIC;
++const char *__gnat_run_path_option = "";
++char __gnat_shared_libgnat_default = SHARED;
++char __gnat_shared_libgcc_default = SHARED;
+ int __gnat_link_max = 8192;
+ unsigned char __gnat_objlist_file_supported = 1;
+ const char *__gnat_object_library_extension = ".a";
diff --git a/legacy/gcc6/add-classic_table-support.patch b/legacy/gcc6/add-classic_table-support.patch
new file mode 100644
index 000000000..e74929302
--- /dev/null
+++ b/legacy/gcc6/add-classic_table-support.patch
@@ -0,0 +1,152 @@
+--- gcc-6.4.0/libstdc++-v3/config/os/generic/ctype_base.h.old	2016-01-04 08:30:50.652828000 -0600
++++ gcc-6.4.0/libstdc++-v3/config/os/generic/ctype_base.h	2017-10-16 07:51:26.226276759 -0500
+@@ -40,19 +40,27 @@
+ 
+     // NB: Offsets into ctype<char>::_M_table force a particular size
+     // on the mask type. Because of this, we don't use an enum.
+-    typedef unsigned int 	mask;
+-    static const mask upper    	= 1 << 0;
+-    static const mask lower 	= 1 << 1;
+-    static const mask alpha 	= 1 << 2;
+-    static const mask digit 	= 1 << 3;
+-    static const mask xdigit 	= 1 << 4;
+-    static const mask space 	= 1 << 5;
+-    static const mask print 	= 1 << 6;
+-    static const mask graph 	= (1 << 2) | (1 << 3) | (1 << 9); // alnum|punct
+-    static const mask cntrl 	= 1 << 8;
+-    static const mask punct 	= 1 << 9;
+-    static const mask alnum 	= (1 << 2) | (1 << 3);  // alpha|digit
+-    static const mask blank	= 1 << 10;
++    typedef unsigned short int 	mask;
++/* horrible ugly code from glibc */
++#ifndef _ISbit
++# if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
++#  define _ISbit(i) (1 << (i))
++# else
++#  define _ISbit(i) (i < 8 ? (1 << i << 8) : (1 << i >> 8))
++# endif
++#endif
++    static const mask upper    	= _ISbit(0);
++    static const mask lower 	= _ISbit(1);
++    static const mask alpha 	= _ISbit(2);
++    static const mask digit 	= _ISbit(3);
++    static const mask xdigit 	= _ISbit(4);
++    static const mask space 	= _ISbit(5);
++    static const mask print 	= _ISbit(6);
++    static const mask graph 	= _ISbit(7);
++    static const mask cntrl 	= _ISbit(9);
++    static const mask punct 	= _ISbit(10);
++    static const mask alnum 	= _ISbit(11);
++    static const mask blank	= _ISbit(8);
+   };
+ 
+ _GLIBCXX_END_NAMESPACE_VERSION
+--- gcc-6.4.0/libstdc++-v3/config/os/generic/ctype_configure_char.cc.old	2016-01-04 08:30:50.652828000 -0600
++++ gcc-6.4.0/libstdc++-v3/config/os/generic/ctype_configure_char.cc	2017-10-16 08:37:57.986260218 -0500
+@@ -40,7 +40,105 @@
+ 
+   const ctype_base::mask*
+   ctype<char>::classic_table() throw()
+-  { return 0; }
++  {
++    static ctype_base::mask mask[256] = {
++      cntrl, cntrl, cntrl, cntrl, cntrl, cntrl, cntrl, cntrl,
++      cntrl, cntrl | blank | space, cntrl | space, cntrl | space,
++      cntrl | space, cntrl | space, cntrl, cntrl,
++      cntrl, cntrl, cntrl, cntrl, cntrl, cntrl, cntrl, cntrl,
++      cntrl, cntrl, cntrl, cntrl, cntrl, cntrl, cntrl, cntrl,
++      print | space | blank,
++      print | punct, print | punct,
++      print | punct, print | punct,
++      print | punct, print | punct,
++      print | punct, print | punct,
++      print | punct, print | punct,
++      print | punct, print | punct,
++      print | punct, print | punct,
++      print | punct,
++      print | alnum | digit | xdigit, print | alnum | digit | xdigit,
++      print | alnum | digit | xdigit, print | alnum | digit | xdigit,
++      print | alnum | digit | xdigit, print | alnum | digit | xdigit,
++      print | alnum | digit | xdigit, print | alnum | digit | xdigit,
++      print | alnum | digit | xdigit, print | alnum | digit | xdigit,
++      print | punct, print | punct,
++      print, print, print,
++      print | punct, print,
++      print | alnum | xdigit | alpha | upper,
++      print | alnum | xdigit | alpha | upper,
++      print | alnum | xdigit | alpha | upper,
++      print | alnum | xdigit | alpha | upper,
++      print | alnum | xdigit | alpha | upper,
++      print | alnum | xdigit | alpha | upper,
++      print | alnum | alpha | upper,
++      print | alnum | alpha | upper,
++      print | alnum | alpha | upper,
++      print | alnum | alpha | upper,
++      print | alnum | alpha | upper,
++      print | alnum | alpha | upper,
++      print | alnum | alpha | upper,
++      print | alnum | alpha | upper,
++      print | alnum | alpha | upper,
++      print | alnum | alpha | upper,
++      print | alnum | alpha | upper,
++      print | alnum | alpha | upper,
++      print | alnum | alpha | upper,
++      print | alnum | alpha | upper,
++      print | alnum | alpha | upper,
++      print | alnum | alpha | upper,
++      print | alnum | alpha | upper,
++      print | alnum | alpha | upper,
++      print | alnum | alpha | upper,
++      print | alnum | alpha | upper,
++      print | punct, print | punct, print | punct,
++      print | punct, print | punct, print | punct,
++      print | alnum | xdigit | alpha | lower,
++      print | alnum | xdigit | alpha | lower,
++      print | alnum | xdigit | alpha | lower,
++      print | alnum | xdigit | alpha | lower,
++      print | alnum | xdigit | alpha | lower,
++      print | alnum | xdigit | alpha | lower,
++      print | alnum | alpha | lower,
++      print | alnum | alpha | lower,
++      print | alnum | alpha | lower,
++      print | alnum | alpha | lower,
++      print | alnum | alpha | lower,
++      print | alnum | alpha | lower,
++      print | alnum | alpha | lower,
++      print | alnum | alpha | lower,
++      print | alnum | alpha | lower,
++      print | alnum | alpha | lower,
++      print | alnum | alpha | lower,
++      print | alnum | alpha | lower,
++      print | alnum | alpha | lower,
++      print | alnum | alpha | lower,
++      print | alnum | alpha | lower,
++      print | alnum | alpha | lower,
++      print | alnum | alpha | lower,
++      print | alnum | alpha | lower,
++      print | alnum | alpha | lower,
++      print | alnum | alpha | lower,
++      print | punct, print | punct, print | punct, print | punct,
++      cntrl,
++      0, 0, 0, 0, 0, 0, 0, 0,
++      0, 0, 0, 0, 0, 0, 0, 0,
++      0, 0, 0, 0, 0, 0, 0, 0,
++      0, 0, 0, 0, 0, 0, 0, 0,
++      0, 0, 0, 0, 0, 0, 0, 0,
++      0, 0, 0, 0, 0, 0, 0, 0,
++      0, 0, 0, 0, 0, 0, 0, 0,
++      0, 0, 0, 0, 0, 0, 0, 0,
++      0, 0, 0, 0, 0, 0, 0, 0,
++      0, 0, 0, 0, 0, 0, 0, 0,
++      0, 0, 0, 0, 0, 0, 0, 0,
++      0, 0, 0, 0, 0, 0, 0, 0,
++      0, 0, 0, 0, 0, 0, 0, 0,
++      0, 0, 0, 0, 0, 0, 0, 0,
++      0, 0, 0, 0, 0, 0, 0, 0,
++      0, 0, 0, 0, 0, 0, 0, 0
++    };
++    return mask;
++  }
+ 
+   ctype<char>::ctype(__c_locale, const mask* __table, bool __del, 
+ 		     size_t __refs) 
diff --git a/legacy/gcc6/boehm-gc-musl.patch b/legacy/gcc6/boehm-gc-musl.patch
new file mode 100644
index 000000000..2f106cba1
--- /dev/null
+++ b/legacy/gcc6/boehm-gc-musl.patch
@@ -0,0 +1,62 @@
+--- gcc-4.8.1/boehm-gc/os_dep.c.orig	2013-09-17 07:46:00.969884340 +0000
++++ gcc-4.8.1/boehm-gc/os_dep.c	2013-09-17 06:53:53.629884946 +0000
+@@ -26,7 +26,7 @@
+ #     define __KERNEL__
+ #     include <asm/signal.h>
+ #     undef __KERNEL__
+-#   else
++#   elif defined(__GLIBC__)
+       /* Kernels prior to 2.1.1 defined struct sigcontext_struct instead of */
+       /* struct sigcontext.  libc6 (glibc2) uses "struct sigcontext" in     */
+       /* prototypes, so we have to include the top-level sigcontext.h to    */
+--- gcc-4.8.2/boehm-gc/dyn_load.c.orig	2014-02-17 14:13:09.519850231 +0200
++++ gcc-4.8.2/boehm-gc/dyn_load.c	2014-02-17 14:14:27.906093514 +0200
+@@ -459,9 +459,7 @@
+ /* For glibc 2.2.4+.  Unfortunately, it doesn't work for older	*/
+ /* versions.  Thanks to Jakub Jelinek for most of the code.	*/
+ 
+-# if (defined(LINUX) || defined (__GLIBC__)) /* Are others OK here, too? */ \
+-     && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) \
+-         || (__GLIBC__ == 2 && __GLIBC_MINOR__ == 2 && defined(DT_CONFIG))) 
++# if (defined(LINUX) || defined (__GLIBC__))
+ 
+ /* We have the header files for a glibc that includes dl_iterate_phdr.	*/
+ /* It may still not be available in the library on the target system.   */
+--- gcc-4.8.2/boehm-gc/include/private/gcconfig.h.orig	2014-02-17 14:14:36.026049422 +0200
++++ gcc-4.8.2/boehm-gc/include/private/gcconfig.h	2014-02-17 14:17:11.345207887 +0200
+@@ -684,7 +684,7 @@
+ #       ifdef __ELF__
+ #            define DYNAMIC_LOADING
+ #	     include <features.h>
+-#	     if defined(__GLIBC__)&& __GLIBC__>=2
++#	     if 1
+ #              define SEARCH_FOR_DATA_START
+ #	     else /* !GLIBC2 */
+                extern char **__environ;
+@@ -1147,7 +1147,7 @@
+ #              define DATASTART ((ptr_t)((((word) (_etext)) + 0xfff) & ~0xfff))
+ #	     endif
+ #	     include <features.h>
+-#	     if defined(__GLIBC__) && __GLIBC__ >= 2
++#	     if 1
+ #		 define SEARCH_FOR_DATA_START
+ #	     else
+      	         extern char **__environ;
+@@ -1367,7 +1367,7 @@
+ #       define HBLKSIZE 4096
+ #     endif
+ #     define USE_GENERIC_PUSH_REGS
+-#     if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 2 || __GLIBC__ > 2
++#     if 1
+ #        define LINUX_STACKBOTTOM
+ #     else
+ #        define STACKBOTTOM 0x80000000
+@@ -1858,7 +1858,7 @@
+ #       ifdef __ELF__
+ #            define DYNAMIC_LOADING
+ #	     include <features.h>
+-#	     if defined(__GLIBC__) && __GLIBC__ >= 2
++#	     if 1
+ #		 define SEARCH_FOR_DATA_START
+ #	     else
+      	         extern char **__environ;
diff --git a/legacy/gcc6/fix-cxxflags-passing.patch b/legacy/gcc6/fix-cxxflags-passing.patch
new file mode 100644
index 000000000..8eb1de77d
--- /dev/null
+++ b/legacy/gcc6/fix-cxxflags-passing.patch
@@ -0,0 +1,10 @@
+--- gcc-4.8.1/Makefile.in.orig
++++ gcc-4.8.1/Makefile.in
+@@ -169,6 +169,7 @@
+ # built for the build system to override those in BASE_FLAGS_TO_PASSS.
+ EXTRA_BUILD_FLAGS = \
+ 	CFLAGS="$(CFLAGS_FOR_BUILD)" \
++	CXXFLAGS="$(CXXFLAGS_FOR_BUILD)" \
+ 	LDFLAGS="$(LDFLAGS_FOR_BUILD)"
+ 
+ # This is the list of directories to built for the host system.
diff --git a/legacy/gcc6/fix-gcj-iconv-musl.patch b/legacy/gcc6/fix-gcj-iconv-musl.patch
new file mode 100644
index 000000000..b0015751e
--- /dev/null
+++ b/legacy/gcc6/fix-gcj-iconv-musl.patch
@@ -0,0 +1,120 @@
+--- gcc-4.8.2/libjava/gnu/gcj/convert/natIconv.cc.orig	2014-02-18 18:46:14.897880526 +0200
++++ gcc-4.8.2/libjava/gnu/gcj/convert/natIconv.cc	2014-02-18 18:50:08.766613550 +0200
+@@ -24,6 +24,13 @@
+ 
+ #ifdef HAVE_ICONV
+ #include <iconv.h>
++#include <endian.h>
++
++#if __BYTE_ORDER == __BIG_ENDIAN
++#define UCS2_CHARSET "UCS-2BE"
++#else
++#define UCS2_CHARSET "UCS-2LE"
++#endif
+ 
+ template<typename T>
+ static inline size_t
+@@ -45,7 +52,7 @@
+   _Jv_GetStringUTFRegion (encoding, 0, encoding->length(), buffer);
+   buffer[len] = '\0';
+ 
+-  iconv_t h = iconv_open ("UCS-2", buffer);
++  iconv_t h = iconv_open (UCS2_CHARSET, buffer);
+   if (h == (iconv_t) -1)
+     throw new ::java::io::UnsupportedEncodingException (encoding);
+ 
+@@ -99,18 +106,6 @@
+ 	throw new ::java::io::CharConversionException ();
+     }
+ 
+-  if (iconv_byte_swap)
+-    {
+-      size_t max = (old_out - outavail) / sizeof (jchar);
+-      for (size_t i = 0; i < max; ++i)
+-	{
+-	  // Byte swap.
+-	  jchar c = (((out[outpos + i] & 0xff) << 8)
+-		     | ((out[outpos + i] >> 8) & 0xff));
+-	  outbuf[i] = c;
+-	}
+-    }
+-
+   inpos += old_in - inavail;
+   return (old_out - outavail) / sizeof (jchar);
+ #else /* HAVE_ICONV */
+@@ -145,7 +140,7 @@
+   _Jv_GetStringUTFRegion (encoding, 0, encoding->length(), buffer);
+   buffer[len] = '\0';
+ 
+-  iconv_t h = iconv_open (buffer, "UCS-2");
++  iconv_t h = iconv_open (buffer, UCS2_CHARSET);
+   if (h == (iconv_t) -1)
+     throw new ::java::io::UnsupportedEncodingException (encoding);
+ 
+@@ -187,20 +182,6 @@
+   char *inbuf = (char *) &chars[inpos];
+   char *outbuf = (char *) &out[count];
+ 
+-  if (iconv_byte_swap)
+-    {
+-      // Ugly performance penalty -- don't use losing systems!
+-      temp_buffer = (jchar *) _Jv_Malloc (inlength * sizeof (jchar));
+-      for (int i = 0; i < inlength; ++i)
+-	{
+-	  // Byte swap.
+-	  jchar c = (((chars[inpos + i] & 0xff) << 8)
+-		     | ((chars[inpos + i] >> 8) & 0xff));
+-	  temp_buffer[i] = c;
+-	}
+-      inbuf = (char *) temp_buffer;
+-    }
+-
+   size_t loop_old_in = old_in;
+   while (1)
+     {
+@@ -252,44 +233,7 @@
+ jboolean
+ gnu::gcj::convert::IOConverter::iconv_init (void)
+ {
+-  // Some versions of iconv() always return their UCS-2 results in
+-  // big-endian order, and they also require UCS-2 inputs to be in
+-  // big-endian order.  For instance, glibc 2.1.3 does this.  If the
+-  // UTF-8=>UCS-2 iconv converter has this feature, then we assume
+-  // that all UCS-2 converters do.  (This might not be the best
+-  // heuristic, but is is all we've got.)
+-  jboolean result = false;
+-#ifdef HAVE_ICONV
+-  iconv_t handle = iconv_open ("UCS-2", "UTF-8");
+-  if (handle != (iconv_t) -1)
+-    {
+-      jchar c;
+-      unsigned char in[4];
+-      char *inp, *outp;
+-      size_t inc, outc, r;
+-
+-      // This is the UTF-8 encoding of \ufeff.  At least Tru64 UNIX libiconv
+-      // needs the trailing NUL byte, otherwise iconv fails with EINVAL.
+-      in[0] = 0xef;
+-      in[1] = 0xbb;
+-      in[2] = 0xbf;
+-      in[3] = 0x00;
+-
+-      inp = (char *) in;
+-      inc = 4;
+-      outp = (char *) &c;
+-      outc = 2;
+-
+-      r = iconv_adapter (iconv, handle, &inp, &inc, &outp, &outc);
+-      // Conversion must be complete for us to use the result.
+-      if (r != (size_t) -1 && inc == 0 && outc == 0)
+-	result = (c != 0xfeff);
+-
+-      // Release iconv handle.
+-      iconv_close (handle);
+-    }
+-#endif /* HAVE_ICONV */
+-  return result;
++  return false;
+ }
+ 
+ void
diff --git a/legacy/gcc6/fix-gcj-musl.patch b/legacy/gcc6/fix-gcj-musl.patch
new file mode 100644
index 000000000..d26f510c0
--- /dev/null
+++ b/legacy/gcc6/fix-gcj-musl.patch
@@ -0,0 +1,49 @@
+--- gcc-4.8.2/libjava/gnu/classpath/natSystemProperties.cc.orig	2014-02-18 10:55:08.617678779 +0200
++++ gcc-4.8.2/libjava/gnu/classpath/natSystemProperties.cc	2014-02-18 10:56:31.927227453 +0200
+@@ -289,7 +289,7 @@
+   // just default to `en_US'.
+   setlocale (LC_ALL, "");
+   char *locale = setlocale (LC_MESSAGES, "");
+-  if (locale && strlen (locale) >= 2)
++  if (locale && strlen (locale) >= 2 && (locale[2] == '\0' || locale[2] == '_'))
+     {
+       char buf[3];
+       buf[2] = '\0';
+--- gcc-4.8.2/libjava/posix-threads.cc.orig	2014-02-18 13:22:01.789933726 +0200
++++ gcc-4.8.2/libjava/posix-threads.cc	2014-02-18 13:29:50.924058875 +0200
+@@ -657,6 +657,7 @@
+   struct sched_param param;
+   pthread_attr_t attr;
+   struct starter *info;
++  size_t ss;
+ 
+   if (data->flags & FLAG_START)
+     return;
+@@ -675,8 +676,25 @@
+   // Set stack size if -Xss option was given.
+   if (gcj::stack_size > 0)
+     {
+-      int e = pthread_attr_setstacksize (&attr, gcj::stack_size);
++      ss = gcj::stack_size;
++    }
++  else
++    {
++      int e = pthread_attr_getstacksize (&attr, &ss);
++      if (e != 0)
++        JvFail (strerror (e));
++
++      // Request at least 1meg of stack
++      if (ss >= 1024 * 1024)
++        ss = 0;
++      else
++        ss = 1024 * 1024;
++    }
++
++  if (ss)
++    {
++      int e = pthread_attr_setstacksize (&attr, ss);
+       if (e != 0)
+ 	JvFail (strerror (e));
+     }
+ 
+   info = (struct starter *) _Jv_AllocBytes (sizeof (struct starter));
diff --git a/legacy/gcc6/fix-gcj-stdgnu14-link.patch b/legacy/gcc6/fix-gcj-stdgnu14-link.patch
new file mode 100644
index 000000000..2b2ce0fa5
--- /dev/null
+++ b/legacy/gcc6/fix-gcj-stdgnu14-link.patch
@@ -0,0 +1,35 @@
+--- gcc-6.1.0/libjava/Makefile.am
++++ gcc-6.1.0/libjava/Makefile.am
+@@ -488,10 +488,14 @@
+ nat_files = $(nat_source_files:.cc=.lo)
+ xlib_nat_files = $(xlib_nat_source_files:.cc=.lo)
+ 
++libgcj_la_CPPFLAGS = \
++        $(AM_CPPFLAGS) \
++        $(LIBSTDCXX_RAW_CXX_CXXFLAGS)
++
+ # Include THREADLIBS here to ensure that the correct version of
+ # certain linuxthread functions get linked:
+ ## The mysterious backslash in the grep pattern is consumed by make.
+-libgcj_la_LDFLAGS = -rpath $(toolexeclibdir) $(THREADLDFLAGS) $(extra_ldflags) $(THREADLIBS) \
++libgcj_la_LDFLAGS = $(LIBSTDCXX_RAW_CXX_LDFLAGS) -rpath $(toolexeclibdir) $(THREADLDFLAGS) $(extra_ldflags) $(THREADLIBS) \
+ 	$(LIBLTDL) $(SYS_ZLIBS) $(LIBJAVA_LDFLAGS_NOUNDEF) \
+ 	-version-info `grep -v '^\#' $(srcdir)/libtool-version` \
+ 	$(LIBGCJ_LD_SYMBOLIC_FUNCTIONS) $(LIBGCJ_LD_EXPORT_ALL)
+--- gcc-6.1.0/libjava/Makefile.in
++++ gcc-6.1.0/libjava/Makefile.in
+@@ -1103,9 +1103,13 @@
+ nat_files = $(nat_source_files:.cc=.lo)
+ xlib_nat_files = $(xlib_nat_source_files:.cc=.lo)
+ 
++libgcj_la_CPPFLAGS = \
++	$(AM_CPPFLAGS) \
++        $(LIBSTDCXX_RAW_CXX_CXXFLAGS)
++
+ # Include THREADLIBS here to ensure that the correct version of
+ # certain linuxthread functions get linked:
+-libgcj_la_LDFLAGS = -rpath $(toolexeclibdir) $(THREADLDFLAGS) $(extra_ldflags) $(THREADLIBS) \
++libgcj_la_LDFLAGS = $(LIBSTDCXX_RAW_CXX_LDFLAGS) -rpath $(toolexeclibdir) $(THREADLDFLAGS) $(extra_ldflags) $(THREADLIBS) \
+ 	$(LIBLTDL) $(SYS_ZLIBS) $(LIBJAVA_LDFLAGS_NOUNDEF) \
+ 	-version-info `grep -v '^\#' $(srcdir)/libtool-version` \
+ 	$(LIBGCJ_LD_SYMBOLIC_FUNCTIONS) $(LIBGCJ_LD_EXPORT_ALL)
diff --git a/legacy/gcc6/fix-rs6000-pie.patch b/legacy/gcc6/fix-rs6000-pie.patch
new file mode 100644
index 000000000..1fbc31a56
--- /dev/null
+++ b/legacy/gcc6/fix-rs6000-pie.patch
@@ -0,0 +1,59 @@
+--- gcc-6.3.0.orig/gcc/config/rs6000/sysv4.h
++++ gcc-6.3.0/gcc/config/rs6000/sysv4.h
+@@ -753,23 +753,42 @@
+ #endif
+ 
+ #ifdef HAVE_LD_PIE
+-#define	STARTFILE_LINUX_SPEC "\
+-%{!shared: %{pg|p|profile:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}} \
+-%{mnewlib:ecrti.o%s;:crti.o%s} \
+-%{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s} \
+-" CRTOFFLOADBEGIN
++#define STARTFILE_LINUX_SPEC \
++  "%{!shared: %{pg|p|profile:gcrt1.o%s;: \
++    %{" PIE_SPEC ":%{static:rcrt1.o%s;:Scrt1.o%s}} %{" NO_PIE_SPEC ":crt1.o%s}}} \
++   crti.o%s %{shared:crtbeginS.o%s;: \
++              %{" PIE_SPEC ":crtbeginS.o%s} \
++              %{" NO_PIE_SPEC ":%{static:crtbeginT.o%s;:crtbegin.o%s}}} \
++   %{fvtable-verify=none:%s; \
++     fvtable-verify=preinit:vtv_start_preinit.o%s; \
++     fvtable-verify=std:vtv_start.o%s} \
++   " CRTOFFLOADBEGIN
+ #else
+-#define	STARTFILE_LINUX_SPEC "\
+-%{!shared: %{pg|p|profile:gcrt1.o%s;:crt1.o%s}} \
+-%{mnewlib:ecrti.o%s;:crti.o%s} \
+-%{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s} \
+-" CRTOFFLOADBEGIN
++#define STARTFILE_LINUX_SPEC \
++  "%{!shared: %{pg|p|profile:gcrt1.o%s;:crt1.o%s}} \
++   crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s} \
++   %{fvtable-verify=none:%s; \
++     fvtable-verify=preinit:vtv_start_preinit.o%s; \
++     fvtable-verify=std:vtv_start.o%s} \
++   " CRTOFFLOADBEGIN
+ #endif
+ 
+-#define	ENDFILE_LINUX_SPEC "\
+-%{shared|pie:crtendS.o%s;:crtend.o%s} \
+-%{mnewlib:ecrtn.o%s;:crtn.o%s} \
+-" CRTOFFLOADEND
++#ifdef HAVE_LD_PIE
++#define ENDFILE_LINUX_SPEC \
++  "%{fvtable-verify=none:%s; \
++     fvtable-verify=preinit:vtv_end_preinit.o%s; \
++     fvtable-verify=std:vtv_end.o%s} \
++   %{shared:crtendS.o%s;: %{" PIE_SPEC ":crtendS.o%s} \
++   %{" NO_PIE_SPEC ":crtend.o%s}} crtn.o%s \
++   " CRTOFFLOADEND
++#else
++#define ENDFILE_LINUX_SPEC \
++  "%{fvtable-verify=none:%s; \
++     fvtable-verify=preinit:vtv_end_preinit.o%s; \
++     fvtable-verify=std:vtv_end.o%s} \
++   %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s \
++   " CRTOFFLOADEND
++#endif
+ 
+ #define LINK_START_LINUX_SPEC ""
+ 
diff --git a/legacy/gcc6/gcc-4.8-build-args.patch b/legacy/gcc6/gcc-4.8-build-args.patch
new file mode 100644
index 000000000..c27e00961
--- /dev/null
+++ b/legacy/gcc6/gcc-4.8-build-args.patch
@@ -0,0 +1,41 @@
+When cross compiling a target gcc, target flags may be used on the host
+
+Configure identifies a number of warning flags (WARN_CFLAGS and
+WARN_CXXFLAGS) from the $CC value.  The cross compiler may be different
+from the host compiler and may not support the same set of flags.  This
+leads to problems such as:
+
+cc1plus: error: unrecognized command line option "-Wno-narrowing"
+cc1plus: error: unrecognized command line option "-Wno-overlength-strings"
+
+Work around this problem by removing the warning flags from the
+BUILD_CXXFLAGS value, in a way similar to the BUILD_CFLAGS.
+
+Upstream-Status: Pending
+
+Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
+
+Index: gcc-4.8.0/gcc/configure
+===================================================================
+--- gcc-4.8.0.orig/gcc/configure
++++ gcc-4.8.0/gcc/configure
+@@ -11720,6 +10581,7 @@ STMP_FIXINC=stmp-fixinc
+ if test x$build != x$host || test "x$coverage_flags" != x
+ then
+     BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
++    BUILD_CXXFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
+     BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)'
+ fi
+ 
+Index: gcc-4.8.0/gcc/configure.ac
+===================================================================
+--- gcc-4.8.0.orig/gcc/configure.ac
++++ gcc-4.8.0/gcc/configure.ac
+@@ -1901,6 +1901,7 @@ STMP_FIXINC=stmp-fixinc		AC_SUBST(STMP_F
+ if test x$build != x$host || test "x$coverage_flags" != x
+ then
+     BUILD_CFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
++    BUILD_CXXFLAGS='$(INTERNAL_CFLAGS) $(T_CFLAGS) $(CFLAGS_FOR_BUILD)'
+     BUILD_LDFLAGS='$(LDFLAGS_FOR_BUILD)'
+ fi
+ 
diff --git a/legacy/gcc6/gcc-4.9-musl-fortify.patch b/legacy/gcc6/gcc-4.9-musl-fortify.patch
new file mode 100644
index 000000000..daae954c8
--- /dev/null
+++ b/legacy/gcc6/gcc-4.9-musl-fortify.patch
@@ -0,0 +1,11 @@
+--- gcc-4.9.2/gcc/config/linux.h.orig	2015-03-09 13:27:13.289736710 +0000
++++ gcc-4.9.2/gcc/config/linux.h	2015-03-09 13:29:32.295625046 +0000
+@@ -146,6 +146,8 @@
+ 
+ #ifdef NATIVE_SYSTEM_HEADER_DIR
+ #define INCLUDE_DEFAULTS_MUSL_NATIVE			\
++    { NATIVE_SYSTEM_HEADER_DIR "/fortify", 0, 0, 0, 1, 2 },	\
++    { NATIVE_SYSTEM_HEADER_DIR "/fortify", 0, 0, 0, 1, 0 },	\
+     { NATIVE_SYSTEM_HEADER_DIR, 0, 0, 0, 1, 2 },	\
+     { NATIVE_SYSTEM_HEADER_DIR, 0, 0, 0, 1, 0 },
+ #else
diff --git a/legacy/gcc6/gcc-5.4.0-locale.patch b/legacy/gcc6/gcc-5.4.0-locale.patch
new file mode 100644
index 000000000..dca3ba9e8
--- /dev/null
+++ b/legacy/gcc6/gcc-5.4.0-locale.patch
@@ -0,0 +1,13 @@
+diff --git gcc-5.4.0/libstdc++-v3/config/locale/generic/c_locale.cc.orig gcc-5.4.0/libstdc++-v3/config/locale/generic/c_locale.cc
+--- gcc-5.4.0/libstdc++-v3/config/locale/generic/c_locale.cc.orig
++++ gcc-5.4.0/libstdc++-v3/config/locale/generic/c_locale.cc
+@@ -213,9 +213,6 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
+     // Currently, the generic model only supports the "C" locale.
+     // See http://gcc.gnu.org/ml/libstdc++/2003-02/msg00345.html
+     __cloc = 0;
+-    if (strcmp(__s, "C"))
+-      __throw_runtime_error(__N("locale::facet::_S_create_c_locale "
+-			    "name not valid"));
+   }
+ 
+   void
diff --git a/legacy/gcc6/gcc-6.1-musl-libssp.patch b/legacy/gcc6/gcc-6.1-musl-libssp.patch
new file mode 100644
index 000000000..fe5c61434
--- /dev/null
+++ b/legacy/gcc6/gcc-6.1-musl-libssp.patch
@@ -0,0 +1,20 @@
+Author: Timo Teräs <timo.teras@iki.fi>
+
+Alpine musl package provides libssp_nonshared.a. We link to it unconditionally,
+as otherwise we get link failures if some objects are -fstack-protector built
+and final link happens with -fno-stack-protector. This seems to be the common
+case when bootstrapping gcc, the piepatches do not seem to fully fix the
+crosstoolchain and  bootstrap sequence wrt. stack-protector flag usage.
+
+--- gcc-6.1.0/gcc/gcc.c.orig
++++ gcc-6.1.0/gcc/gcc.c
+@@ -870,8 +870,7 @@
+ 
+ #ifndef LINK_SSP_SPEC
+ #ifdef TARGET_LIBC_PROVIDES_SSP
+-#define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all" \
+-		       "|fstack-protector-strong|fstack-protector-explicit:}"
++#define LINK_SSP_SPEC "-lssp_nonshared"
+ #else
+ #define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all" \
+ 		       "|fstack-protector-strong|fstack-protector-explicit" \
diff --git a/legacy/gcc6/gcc-pure64.patch b/legacy/gcc6/gcc-pure64.patch
new file mode 100644
index 000000000..2c350fe5a
--- /dev/null
+++ b/legacy/gcc6/gcc-pure64.patch
@@ -0,0 +1,89 @@
+--- ./gcc/config/i386/t-linux64.orig	2013-01-14 16:32:37.000000000 +0000
++++ ./gcc/config/i386/t-linux64	2013-04-22 06:12:32.984439677 +0000
+@@ -34,6 +34,6 @@
+ comma=,
+ MULTILIB_OPTIONS    = $(subst $(comma),/,$(TM_MULTILIB_CONFIG))
+ MULTILIB_DIRNAMES   = $(patsubst m%, %, $(subst /, ,$(MULTILIB_OPTIONS)))
+-MULTILIB_OSDIRNAMES = m64=../lib64$(call if_multiarch,:x86_64-linux-gnu)
+-MULTILIB_OSDIRNAMES+= m32=$(if $(wildcard $(shell echo $(SYSTEM_HEADER_DIR))/../../usr/lib32),../lib32,../lib)$(call if_multiarch,:i386-linux-gnu)
++MULTILIB_OSDIRNAMES = m64=../lib
++MULTILIB_OSDIRNAMES+= m32=../lib32
+ MULTILIB_OSDIRNAMES+= mx32=../libx32$(call if_multiarch,:x86_64-linux-gnux32)
+--- ./gcc/config/aarch64/t-aarch64-linux.orig
++++ ./gcc/config/aarch64/t-aarch64-linux
+@@ -22,7 +22,7 @@
+ LIB1ASMFUNCS = _aarch64_sync_cache_range
+ 
+ AARCH_BE = $(if $(findstring TARGET_BIG_ENDIAN_DEFAULT=1, $(tm_defines)),_be)
+-MULTILIB_OSDIRNAMES = mabi.lp64=../lib64$(call if_multiarch,:aarch64$(AARCH_BE)-linux-gnu)
++MULTILIB_OSDIRNAMES = mabi.lp64=../lib
+ MULTIARCH_DIRNAME = $(call if_multiarch,aarch64$(AARCH_BE)-linux-gnu)
+ 
+ MULTILIB_OSDIRNAMES += mabi.ilp32=../libilp32
+--- ./gcc/config/s390/t-linux64.orig
++++ ./gcc/config/s390/t-linux64
+@@ -7,5 +7,5 @@
+ MULTILIB_OPTIONS = m64/m31
+ MULTILIB_DIRNAMES = 64 32
+-MULTILIB_OSDIRNAMES = ../lib64$(call if_multiarch,:s390x-linux-gnu)
+-MULTILIB_OSDIRNAMES += $(if $(wildcard $(shell echo $(SYSTEM_HEADER_DIR))/../../usr/lib32),../lib32,../lib)$(call if_multiarch,:s390-linux-gnu)
++MULTILIB_OSDIRNAMES = m64=../lib
++MULTILIB_OSDIRNAMES+= m32=../lib32
+
+--- ./gcc/config/rs6000/t-linux.orig
++++ ./gcc/config/rs6000/t-linux
+@@ -2,7 +2,8 @@
+ # or soft-float.
+ ifeq (,$(filter $(with_cpu),$(SOFT_FLOAT_CPUS))$(findstring soft,$(with_float)))
+ ifneq (,$(findstring powerpc64,$(target)))
+-MULTILIB_OSDIRNAMES := .=../lib64$(call if_multiarch,:powerpc64-linux-gnu)
++MULTILIB_OSDIRNAMES := m64=../lib
++MULTILIB_OSDIRNAMES += m32=../lib32
+ else
+ ifneq (,$(findstring spe,$(target)))
+ MULTIARCH_DIRNAME := powerpc-linux-gnuspe$(if $(findstring 8548,$(with_cpu)),,v1)
+@@ -14,7 +15,8 @@
+ MULTIARCH_DIRNAME := $(subst -linux,le-linux,$(MULTIARCH_DIRNAME))
+ endif
+ ifneq (,$(findstring powerpc64le,$(target)))
+-MULTILIB_OSDIRNAMES := $(subst -linux,le-linux,$(MULTILIB_OSDIRNAMES))
++MULTILIB_OSDIRNAMES := m64=../lib
++MULTILIB_OSDIRNAMES += m32=../lib32
+ endif
+ endif
+ 
+--- ./gcc/config/rs6000/t-linux64.orig
++++ ./gcc/config/rs6000/t-linux64
+@@ -28,8 +28,8 @@
+ MULTILIB_OPTIONS    := m64/m32
+ MULTILIB_DIRNAMES   := 64 32
+ MULTILIB_EXTRA_OPTS := 
+-MULTILIB_OSDIRNAMES := m64=../lib64$(call if_multiarch,:powerpc64-linux-gnu)
+-MULTILIB_OSDIRNAMES += m32=$(if $(wildcard $(shell echo $(SYSTEM_HEADER_DIR))/../../usr/lib32),../lib32,../lib)$(call if_multiarch,:powerpc-linux-gnu)
++MULTILIB_OSDIRNAMES := m64=../lib
++MULTILIB_OSDIRNAMES += m32=../lib32
+ 
+ rs6000-linux.o: $(srcdir)/config/rs6000/rs6000-linux.c
+ 	$(COMPILE) $<
+--- ./gcc/config/rs6000/t-linux64bele.orig
++++ ./gcc/config/rs6000/t-linux64bele
+@@ -2,6 +2,6 @@
+ 
+ MULTILIB_OPTIONS    += mlittle
+ MULTILIB_DIRNAMES   += le
+-MULTILIB_OSDIRNAMES += $(subst =,.mlittle=,$(subst lible32,lib32le,$(subst lible64,lib64le,$(subst lib,lible,$(subst -linux,le-linux,$(MULTILIB_OSDIRNAMES))))))
+-MULTILIB_OSDIRNAMES += $(subst $(if $(findstring 64,$(target)),m64,m32).,,$(filter $(if $(findstring 64,$(target)),m64,m32).mlittle%,$(MULTILIB_OSDIRNAMES)))
++MULTILIB_OSDIRNAMES = m64=../lib
++MULTILIB_OSDIRNAMES+= m32=../lib32
+ MULTILIB_MATCHES    := ${MULTILIB_MATCHES_ENDIAN}
+--- ./gcc/config/rs6000/t-linux64lebe.orig
++++ ./gcc/config/rs6000/t-linux64lebe
+@@ -2,6 +2,6 @@
+ 
+ MULTILIB_OPTIONS    += mbig
+ MULTILIB_DIRNAMES   += be
+-MULTILIB_OSDIRNAMES += $(subst =,.mbig=,$(subst libbe32,lib32be,$(subst libbe64,lib64be,$(subst lib,libbe,$(subst le-linux,-linux,$(MULTILIB_OSDIRNAMES))))))
+-MULTILIB_OSDIRNAMES += $(subst $(if $(findstring 64,$(target)),m64,m32).,,$(filter $(if $(findstring 64,$(target)),m64,m32).mbig%,$(MULTILIB_OSDIRNAMES)))
++MULTILIB_OSDIRNAMES := m64=../lib
++MULTILIB_OSDIRNAMES += m32=../lib32
+ MULTILIB_MATCHES    := ${MULTILIB_MATCHES_ENDIAN}
diff --git a/legacy/gcc6/isl-fix.patch b/legacy/gcc6/isl-fix.patch
new file mode 100644
index 000000000..d8d294c0e
--- /dev/null
+++ b/legacy/gcc6/isl-fix.patch
@@ -0,0 +1,15 @@
+Fix build with isl >= 0.20.
+
+Backport from https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86724
+
+--- gcc-6.4.0/gcc/graphite.h.old	2016-01-25 18:19:20.909140000 -0600
++++ gcc-6.4.0/gcc/graphite.h	2022-06-21 02:51:53.660000000 -0500
+@@ -40,6 +40,8 @@
+ #ifdef HAVE_ISL_OPTIONS_SET_SCHEDULE_SERIALIZE_SCCS
+ /* isl 0.15 or later.  */
+ #include <isl/schedule_node.h>
++#include <isl/id.h>
++#include <isl/space.h>
+ 
+ #else
+ /* isl 0.14 or 0.13.  */
diff --git a/legacy/gcc6/libgcc-always-build-gcceh.a.patch b/legacy/gcc6/libgcc-always-build-gcceh.a.patch
new file mode 100644
index 000000000..74ae89730
--- /dev/null
+++ b/legacy/gcc6/libgcc-always-build-gcceh.a.patch
@@ -0,0 +1,39 @@
+Highly inspired by:
+  http://landley.net/hg/aboriginal/file/7e0747a665ab/sources/patches/gcc-core-libgcceh.patch
+
+diff -durN gcc-4.6.0.orig/libgcc/Makefile.in gcc-4.6.0/libgcc/Makefile.in
+--- gcc-4.6.0.orig/libgcc/Makefile.in	2011-01-26 05:19:58.000000000 +0100
++++ gcc-4.6.0/libgcc/Makefile.in	2011-09-12 18:17:12.743718974 +0200
+@@ -772,8 +772,9 @@
+ libgcc_s$(SHLIB_EXT): libunwind$(SHLIB_EXT)
+ endif
+ 
++all: libgcc_eh.a
+ ifeq ($(enable_shared),yes)
+-all: libgcc_eh.a libgcc_s$(SHLIB_EXT)
++all: libgcc_s$(SHLIB_EXT)
+ ifneq ($(LIBUNWIND),)
+ all: libunwind$(SHLIB_EXT)
+ endif
+@@ -950,10 +951,6 @@
+ install-shared:
+ 	$(mkinstalldirs) $(DESTDIR)$(inst_libdir)
+ 
+-	$(INSTALL_DATA) libgcc_eh.a $(DESTDIR)$(inst_libdir)/
+-	chmod 644 $(DESTDIR)$(inst_libdir)/libgcc_eh.a
+-	$(RANLIB) $(DESTDIR)$(inst_libdir)/libgcc_eh.a
+-
+ 	$(subst @multilib_dir@,$(MULTIDIR),$(subst \
+ 		@shlib_base_name@,libgcc_s,$(subst \
+ 		@shlib_slibdir_qual@,$(MULTIOSSUBDIR),$(SHLIB_INSTALL))))
+@@ -968,6 +965,10 @@
+ 	chmod 644 $(DESTDIR)$(inst_libdir)/libgcov.a
+ 	$(RANLIB) $(DESTDIR)$(inst_libdir)/libgcov.a
+ 
++	$(INSTALL_DATA) libgcc_eh.a $(DESTDIR)$(inst_libdir)/
++	chmod 644 $(DESTDIR)$(inst_libdir)/libgcc_eh.a
++	$(RANLIB) $(DESTDIR)$(inst_libdir)/libgcc_eh.a
++
+ 	parts="$(INSTALL_PARTS)";				\
+ 	for file in $$parts; do					\
+ 	  rm -f $(DESTDIR)$(inst_libdir)/$$file;		\
diff --git a/legacy/gcc6/libgo-musl-1.2.3.patch b/legacy/gcc6/libgo-musl-1.2.3.patch
new file mode 100644
index 000000000..8873d44eb
--- /dev/null
+++ b/legacy/gcc6/libgo-musl-1.2.3.patch
@@ -0,0 +1,13 @@
+diff --git a/libgo/mksysinfo.sh b/libgo/mksysinfo.sh
+index 6fef104..06289a4 100755
+--- a/libgo/mksysinfo.sh
++++ b/libgo/mksysinfo.sh
+@@ -355,7 +355,7 @@ if ! grep '^const SIGCLD ' ${OUT} >/dev/null 2>&1; then
+ fi
+ 
+ # The syscall numbers.  We force the names to upper case.
+-grep '^const _SYS_' gen-sysinfo.go | \
++grep '^const _SYS_[a-z]' gen-sysinfo.go | \
+   sed -e 's/const _\(SYS_[^= ]*\).*$/\1/' | \
+   while read sys; do
+     sup=`echo $sys | tr abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ`
diff --git a/legacy/gcc6/lra-pentium.patch b/legacy/gcc6/lra-pentium.patch
new file mode 100644
index 000000000..e876bcc39
--- /dev/null
+++ b/legacy/gcc6/lra-pentium.patch
@@ -0,0 +1,48 @@
+--- trunk/gcc/lra-assigns.c	2017/03/10 20:53:18	246058
++++ trunk/gcc/lra-assigns.c	2017/03/10 21:17:13	246059
+@@ -889,6 +889,30 @@
+   live_pseudos_reg_renumber[regno] = hard_regno;
+ }
+ 
++/* Return true iff there is a reason why pseudo SPILL_REGNO should not
++   be spilled.  */
++static bool
++must_not_spill_p (unsigned spill_regno)
++{
++  if ((pic_offset_table_rtx != NULL
++       && spill_regno == REGNO (pic_offset_table_rtx))
++      || ((int) spill_regno >= lra_constraint_new_regno_start
++	  && ! bitmap_bit_p (&lra_inheritance_pseudos, spill_regno)
++	  && ! bitmap_bit_p (&lra_split_regs, spill_regno)
++	  && ! bitmap_bit_p (&lra_subreg_reload_pseudos, spill_regno)
++	  && ! bitmap_bit_p (&lra_optional_reload_pseudos, spill_regno)))
++    return true;
++  /* A reload pseudo that requires a singleton register class should
++     not be spilled.
++     FIXME: this mitigates the issue on certain i386 patterns, but
++     does not solve the general case where existing reloads fully
++     cover a limited register class.  */
++  if (!bitmap_bit_p (&non_reload_pseudos, spill_regno)
++      && reg_class_size [reg_preferred_class (spill_regno)] == 1)
++    return true;
++  return false;
++}
++
+ /* Array used for sorting reload pseudos for subsequent allocation
+    after spilling some pseudo.	*/
+ static int *sorted_reload_pseudos;
+@@ -960,13 +984,7 @@
+       /* Spill pseudos.	 */
+       static_p = false;
+       EXECUTE_IF_SET_IN_BITMAP (&spill_pseudos_bitmap, 0, spill_regno, bi)
+-	if ((pic_offset_table_rtx != NULL
+-	     && spill_regno == REGNO (pic_offset_table_rtx))
+-	    || ((int) spill_regno >= lra_constraint_new_regno_start
+-		&& ! bitmap_bit_p (&lra_inheritance_pseudos, spill_regno)
+-		&& ! bitmap_bit_p (&lra_split_regs, spill_regno)
+-		&& ! bitmap_bit_p (&lra_subreg_reload_pseudos, spill_regno)
+-		&& ! bitmap_bit_p (&lra_optional_reload_pseudos, spill_regno)))
++	if (must_not_spill_p (spill_regno))
+ 	  goto fail;
+ 	else if (non_spilled_static_chain_regno_p (spill_regno))
+ 	  static_p = true;