From 02eba070218243e33820c229e6f4526b5da538c4 Mon Sep 17 00:00:00 2001
From: Waldemar Brodkorb <wbx@openadk.org>
Date: Sat, 16 Jan 2016 21:42:24 +0100
Subject: gcc: add missing patches for musl native gcc
---
package/gcc/patches/5.3.0/bfin-fix-gcc.patch | 12 +
package/gcc/patches/5.3.0/cflags.patch | 222 ++++++++
package/gcc/patches/5.3.0/disable-dwarf.bfin | 12 +
package/gcc/patches/5.3.0/fix-m86k-libgcc.patch | 11 +
package/gcc/patches/5.3.0/gcc.musl | 631 +++++++++++++++++++++
package/gcc/patches/5.3.0/ia64-fix-libgcc.patch | 30 +
.../gcc/patches/5.3.0/libstdcxx-uclibc-c99.patch | 237 ++++++++
.../5.3.0/m68k-disable-atomic-uclinux.patch | 12 +
package/gcc/patches/5.3.0/tile-fix-libgcc.patch | 41 ++
.../patches/5.3.0/uclibc-cmath-long-double.patch | 434 ++++++++++++++
10 files changed, 1642 insertions(+)
create mode 100644 package/gcc/patches/5.3.0/bfin-fix-gcc.patch
create mode 100644 package/gcc/patches/5.3.0/cflags.patch
create mode 100644 package/gcc/patches/5.3.0/disable-dwarf.bfin
create mode 100644 package/gcc/patches/5.3.0/fix-m86k-libgcc.patch
create mode 100644 package/gcc/patches/5.3.0/gcc.musl
create mode 100644 package/gcc/patches/5.3.0/ia64-fix-libgcc.patch
create mode 100644 package/gcc/patches/5.3.0/libstdcxx-uclibc-c99.patch
create mode 100644 package/gcc/patches/5.3.0/m68k-disable-atomic-uclinux.patch
create mode 100644 package/gcc/patches/5.3.0/tile-fix-libgcc.patch
create mode 100644 package/gcc/patches/5.3.0/uclibc-cmath-long-double.patch
(limited to 'package/gcc/patches')
diff --git a/package/gcc/patches/5.3.0/bfin-fix-gcc.patch b/package/gcc/patches/5.3.0/bfin-fix-gcc.patch
new file mode 100644
index 000000000..a0643f5fc
--- /dev/null
+++ b/package/gcc/patches/5.3.0/bfin-fix-gcc.patch
@@ -0,0 +1,12 @@
+diff -Nur gcc-4.9.3.orig/gcc/config.gcc gcc-4.9.3/gcc/config.gcc
+--- gcc-4.9.3.orig/gcc/config.gcc 2015-05-21 22:50:59.000000000 +0200
++++ gcc-4.9.3/gcc/config.gcc 2015-11-23 22:51:58.686375134 +0100
+@@ -1101,7 +1101,7 @@
+ ;;
+ bfin*-linux-uclibc*)
+ tm_file="${tm_file} dbxelf.h elfos.h bfin/elf.h gnu-user.h linux.h glibc-stdint.h bfin/linux.h ./linux-sysroot-suffix.h"
+- tmake_file="bfin/t-bfin-linux t-slibgcc t-linux"
++ tmake_file="${tmake_file} bfin/t-bfin-linux t-slibgcc t-linux"
+ use_collect2=no
+ ;;
+ bfin*-rtems*)
diff --git a/package/gcc/patches/5.3.0/cflags.patch b/package/gcc/patches/5.3.0/cflags.patch
new file mode 100644
index 000000000..7ebb5e548
--- /dev/null
+++ b/package/gcc/patches/5.3.0/cflags.patch
@@ -0,0 +1,222 @@
+diff -Nur gcc-5.1.0.orig/gcc/c-family/c-opts.c gcc-5.1.0/gcc/c-family/c-opts.c
+--- gcc-5.1.0.orig/gcc/c-family/c-opts.c 2015-02-13 06:26:37.000000000 +0100
++++ gcc-5.1.0/gcc/c-family/c-opts.c 2015-05-01 23:07:27.000000000 +0200
+@@ -122,6 +122,9 @@
+ /* Whether any standard preincluded header has been preincluded. */
+ static bool done_preinclude;
+
++/* Check if a port honours COPTS. */
++static int honour_copts = 0;
++
+ static void handle_OPT_d (const char *);
+ static void set_std_cxx98 (int);
+ static void set_std_cxx11 (int);
+@@ -449,6 +452,12 @@
+ flag_no_builtin = !value;
+ break;
+
++ case OPT_fhonour_copts:
++ if (c_language == clk_c) {
++ honour_copts++;
++ }
++ break;
++
+ case OPT_fconstant_string_class_:
+ constant_string_class_name = arg;
+ break;
+@@ -1034,6 +1043,47 @@
+ return false;
+ }
+
++ if (c_language == clk_c) {
++ char *ev = getenv ("GCC_HONOUR_COPTS");
++ int evv;
++ if (ev == NULL)
++ evv = -1;
++ else if ((*ev == '0') || (*ev == '\0'))
++ evv = 0;
++ else if (*ev == '1')
++ evv = 1;
++ else if (*ev == '2')
++ evv = 2;
++ else if (*ev == 's')
++ evv = -1;
++ else {
++ warning (0, "unknown GCC_HONOUR_COPTS value, assuming 1");
++ evv = 1; /* maybe depend this on something like MIRBSD_NATIVE? */
++ }
++ if (evv == 1) {
++ if (honour_copts == 0) {
++ error ("someone does not honour COPTS at all in lenient mode");
++ return false;
++ } else if (honour_copts != 1) {
++ warning (0, "someone does not honour COPTS correctly, passed %d times",
++ honour_copts);
++ }
++ } else if (evv == 2) {
++ if (honour_copts == 0) {
++ error ("someone does not honour COPTS at all in strict mode");
++ return false;
++ } else if (honour_copts != 1) {
++ error ("someone does not honour COPTS correctly, passed %d times",
++ honour_copts);
++ return false;
++ }
++ } else if (evv == 0) {
++ if (honour_copts != 1)
++ inform (0, "someone does not honour COPTS correctly, passed %d times",
++ honour_copts);
++ }
++ }
++
+ return true;
+ }
+
+diff -Nur gcc-5.1.0.orig/gcc/c-family/c.opt gcc-5.1.0/gcc/c-family/c.opt
+--- gcc-5.1.0.orig/gcc/c-family/c.opt 2015-03-27 11:29:04.000000000 +0100
++++ gcc-5.1.0/gcc/c-family/c.opt 2015-05-01 23:07:27.000000000 +0200
+@@ -431,6 +431,10 @@
+ C ObjC C++ ObjC++ Var(warn_float_conversion) LangEnabledBy(C ObjC C++ ObjC++,Wconversion)
+ Warn for implicit type conversions that cause loss of floating point precision
+
++Werror-maybe-reset
++C ObjC C++ ObjC++
++; Documented in common.opt
++
+ Wfloat-equal
+ C ObjC C++ ObjC++ Var(warn_float_equal) Warning
+ Warn if testing floating point numbers for equality
+@@ -1161,6 +1165,9 @@
+ fhonor-std
+ C++ ObjC++ Ignore Warn(switch %qs is no longer supported)
+
++fhonour-copts
++C ObjC C++ ObjC++ RejectNegative
++
+ fhosted
+ C ObjC
+ Assume normal C execution environment
+diff -Nur gcc-5.1.0.orig/gcc/common.opt gcc-5.1.0/gcc/common.opt
+--- gcc-5.1.0.orig/gcc/common.opt 2015-02-27 03:06:48.000000000 +0100
++++ gcc-5.1.0/gcc/common.opt 2015-05-01 23:07:27.000000000 +0200
+@@ -561,6 +561,10 @@
+ Common Joined
+ Treat specified warning as error
+
++Werror-maybe-reset
++Common
++If environment variable GCC_NO_WERROR is set, act as -Wno-error
++
+ Wextra
+ Common Var(extra_warnings) Warning
+ Print extra (possibly unwanted) warnings
+@@ -1357,6 +1361,9 @@
+ Common Report Var(flag_guess_branch_prob) Optimization
+ Enable guessing of branch probabilities
+
++fhonour-copts
++Common RejectNegative
++
+ ; Nonzero means ignore `#ident' directives. 0 means handle them.
+ ; Generate position-independent code for executables if possible
+ ; On SVR4 targets, it also controls whether or not to emit a
+diff -Nur gcc-5.1.0.orig/gcc/doc/cppopts.texi gcc-5.1.0/gcc/doc/cppopts.texi
+--- gcc-5.1.0.orig/gcc/doc/cppopts.texi 2015-03-23 02:12:06.000000000 +0100
++++ gcc-5.1.0/gcc/doc/cppopts.texi 2015-05-01 23:07:27.000000000 +0200
+@@ -163,6 +163,11 @@
+ Make all warnings into hard errors. Source code which triggers warnings
+ will be rejected.
+
++ at item -Werror-maybe-reset
++ at opindex Werror-maybe-reset
++Act like @samp{-Wno-error} if the @env{GCC_NO_WERROR} environment
++variable is set to anything other than 0 or empty.
++
+ @item -Wsystem-headers
+ @opindex Wsystem-headers
+ Issue warnings for code in system headers. These are normally unhelpful
+diff -Nur gcc-5.1.0.orig/gcc/doc/invoke.texi gcc-5.1.0/gcc/doc/invoke.texi
+--- gcc-5.1.0.orig/gcc/doc/invoke.texi 2015-04-12 21:29:44.000000000 +0200
++++ gcc-5.1.0/gcc/doc/invoke.texi 2015-05-01 23:07:27.000000000 +0200
+@@ -251,7 +251,7 @@
+ -Wdisabled-optimization @gol
+ -Wno-discarded-qualifiers -Wno-discarded-array-qualifiers @gol
+ -Wno-div-by-zero -Wdouble-promotion -Wempty-body -Wenum-compare @gol
+--Wno-endif-labels -Werror -Werror=* @gol
++-Wno-endif-labels -Werror -Werror=* -Werror-maybe-reset @gol
+ -Wfatal-errors -Wfloat-equal -Wformat -Wformat=2 @gol
+ -Wno-format-contains-nul -Wno-format-extra-args -Wformat-nonliteral @gol
+ -Wformat-security -Wformat-signedness -Wformat-y2k @gol
+@@ -5370,6 +5370,22 @@
+ @option{-Wall} and by @option{-Wpedantic}, which can be disabled with
+ @option{-Wno-pointer-sign}.
+
++ at item -Werror-maybe-reset
++ at opindex Werror-maybe-reset
++Act like @samp{-Wno-error} if the @env{GCC_NO_WERROR} environment
++variable is set to anything other than 0 or empty.
++
++ at item -fhonour-copts
++ at opindex fhonour-copts
++If @env{GCC_HONOUR_COPTS} is set to 1, abort if this option is not
++given at least once, and warn if it is given more than once.
++If @env{GCC_HONOUR_COPTS} is set to 2, abort if this option is not
++given exactly once.
++If @env{GCC_HONOUR_COPTS} is set to 0 or unset, warn if this option
++is not given exactly once.
++The warning is quelled if @env{GCC_HONOUR_COPTS} is set to @samp{s}.
++This flag and environment variable only affect the C language.
++
+ @item -Wstack-protector
+ @opindex Wstack-protector
+ @opindex Wno-stack-protector
+@@ -7843,7 +7859,7 @@
+ second branch or a point immediately following it, depending on whether
+ the condition is known to be true or false.
+
+-Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}.
++Enabled at levels @option{-O3}.
+
+ @item -fsplit-wide-types
+ @opindex fsplit-wide-types
+diff -Nur gcc-5.1.0.orig/gcc/java/jvspec.c gcc-5.1.0/gcc/java/jvspec.c
+--- gcc-5.1.0.orig/gcc/java/jvspec.c 2015-01-30 17:15:00.000000000 +0100
++++ gcc-5.1.0/gcc/java/jvspec.c 2015-05-01 23:07:27.000000000 +0200
+@@ -629,6 +629,7 @@
+ class name. Append dummy `.c' that can be stripped by set_input so %b
+ is correct. */
+ set_input (concat (main_class_name, "main.c", NULL));
++ putenv ("GCC_HONOUR_COPTS=s"); /* XXX hack! */
+ err = do_spec (jvgenmain_spec);
+ if (err == 0)
+ {
+diff -Nur gcc-5.1.0.orig/gcc/opts.c gcc-5.1.0/gcc/opts.c
+--- gcc-5.1.0.orig/gcc/opts.c 2015-02-17 22:25:56.000000000 +0100
++++ gcc-5.1.0/gcc/opts.c 2015-05-01 23:07:27.000000000 +0200
+@@ -511,6 +511,8 @@
+ { OPT_LEVELS_2_PLUS, OPT_flra_remat, NULL, 1 },
+
+ /* -O3 optimizations. */
++ { OPT_LEVELS_3_PLUS, OPT_fstrict_aliasing, NULL, 1 },
++ { OPT_LEVELS_3_PLUS, OPT_fstrict_overflow, NULL, 1 },
+ { OPT_LEVELS_3_PLUS, OPT_ftree_loop_distribute_patterns, NULL, 1 },
+ { OPT_LEVELS_3_PLUS, OPT_fpredictive_commoning, NULL, 1 },
+ /* Inlining of functions reducing size is a good idea with -Os
+@@ -1699,6 +1701,17 @@
+ opts, opts_set, loc, dc);
+ break;
+
++ case OPT_Werror_maybe_reset:
++ {
++ char *ev = getenv ("GCC_NO_WERROR");
++ if ((ev != NULL) && (*ev != '0'))
++ warnings_are_errors = 0;
++ }
++ break;
++
++ case OPT_fhonour_copts:
++ break;
++
+ case OPT_Wlarger_than_:
+ opts->x_larger_than_size = value;
+ opts->x_warn_larger_than = value != -1;
diff --git a/package/gcc/patches/5.3.0/disable-dwarf.bfin b/package/gcc/patches/5.3.0/disable-dwarf.bfin
new file mode 100644
index 000000000..c11baec92
--- /dev/null
+++ b/package/gcc/patches/5.3.0/disable-dwarf.bfin
@@ -0,0 +1,12 @@
+diff -Nur gcc-git.orig/libgcc/config.host gcc-git/libgcc/config.host
+--- gcc-git.orig/libgcc/config.host 2015-10-23 21:12:52.000000000 +0200
++++ gcc-git/libgcc/config.host 2015-11-15 21:17:38.385745887 +0100
+@@ -231,7 +231,7 @@
+ esac
+ ;;
+ *-*-linux* | frv-*-*linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu | *-*-gnu* | *-*-kopensolaris*-gnu)
+- tmake_file="$tmake_file t-crtstuff-pic t-libgcc-pic t-eh-dw2-dip t-slibgcc t-slibgcc-gld t-slibgcc-elf-ver t-linux"
++ tmake_file="$tmake_file t-crtstuff-pic t-libgcc-pic t-slibgcc t-slibgcc-gld t-slibgcc-elf-ver t-linux"
+ extra_parts="crtbegin.o crtbeginS.o crtbeginT.o crtend.o crtendS.o"
+ if test x$enable_vtable_verify = xyes; then
+ extra_parts="$extra_parts vtv_start.o vtv_end.o vtv_start_preinit.o vtv_end_preinit.o"
diff --git a/package/gcc/patches/5.3.0/fix-m86k-libgcc.patch b/package/gcc/patches/5.3.0/fix-m86k-libgcc.patch
new file mode 100644
index 000000000..e8481d549
--- /dev/null
+++ b/package/gcc/patches/5.3.0/fix-m86k-libgcc.patch
@@ -0,0 +1,11 @@
+diff -Nur gcc-4.9.3.orig/libgcc/config/m68k/linux-atomic.c gcc-4.9.3/libgcc/config/m68k/linux-atomic.c
+--- gcc-4.9.3.orig/libgcc/config/m68k/linux-atomic.c 2014-01-02 23:25:22.000000000 +0100
++++ gcc-4.9.3/libgcc/config/m68k/linux-atomic.c 2015-11-29 14:42:10.566143595 +0100
+@@ -33,7 +33,6 @@
+ using the kernel helper defined below. There is no support for
+ 64-bit operations yet. */
+
+-#include <asm/unistd.h>
+ #include <stdbool.h>
+
+ #ifndef __NR_atomic_cmpxchg_32
diff --git a/package/gcc/patches/5.3.0/gcc.musl b/package/gcc/patches/5.3.0/gcc.musl
new file mode 100644
index 000000000..1b47664f0
--- /dev/null
+++ b/package/gcc/patches/5.3.0/gcc.musl
@@ -0,0 +1,631 @@
+diff -Nur gcc-5.3.0.orig/fixincludes/mkfixinc.sh gcc-5.3.0/fixincludes/mkfixinc.sh
+--- gcc-5.3.0.orig/fixincludes/mkfixinc.sh 2012-10-28 22:42:48.000000000 +0100
++++ gcc-5.3.0/fixincludes/mkfixinc.sh 2015-12-08 05:53:22.243521385 +0100
+@@ -19,7 +19,8 @@
+ powerpc-*-eabi* | \
+ powerpc-*-rtems* | \
+ powerpcle-*-eabisim* | \
+- powerpcle-*-eabi* )
++ powerpcle-*-eabi* | \
++ *-musl* )
+ # IF there is no include fixing,
+ # THEN create a no-op fixer and exit
+ (echo "#! /bin/sh" ; echo "exit 0" ) > ${target}
+diff -Nur gcc-5.3.0.orig/gcc/config/aarch64/aarch64-linux.h gcc-5.3.0/gcc/config/aarch64/aarch64-linux.h
+--- gcc-5.3.0.orig/gcc/config/aarch64/aarch64-linux.h 2015-07-24 18:00:26.000000000 +0200
++++ gcc-5.3.0/gcc/config/aarch64/aarch64-linux.h 2015-12-08 05:53:22.243521385 +0100
+@@ -29,6 +29,8 @@
+ #undef CC1_SPEC
+ #define CC1_SPEC GNU_USER_TARGET_CC1_SPEC ASAN_CC1_SPEC
+
++#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-aarch64.so.1"
++
+ #define CPP_SPEC "%{pthread:-D_REENTRANT}"
+
+ #define LINUX_TARGET_LINK_SPEC "%{h*} \
+diff -Nur gcc-5.3.0.orig/gcc/config/arm/linux-eabi.h gcc-5.3.0/gcc/config/arm/linux-eabi.h
+--- gcc-5.3.0.orig/gcc/config/arm/linux-eabi.h 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/gcc/config/arm/linux-eabi.h 2015-12-08 05:53:22.243521385 +0100
+@@ -77,6 +77,23 @@
+ %{mfloat-abi=soft*:" GLIBC_DYNAMIC_LINKER_SOFT_FLOAT "} \
+ %{!mfloat-abi=*:" GLIBC_DYNAMIC_LINKER_DEFAULT "}"
+
++/* For ARM musl currently supports four dynamic linkers:
++ - ld-musl-arm.so.1 - for the EABI-derived soft-float ABI
++ - ld-musl-armhf.so.1 - for the EABI-derived hard-float ABI
++ - ld-musl-armeb.so.1 - for the EABI-derived soft-float ABI, EB
++ - ld-musl-armebhf.so.1 - for the EABI-derived hard-float ABI, EB
++ musl does not support the legacy OABI mode.
++ All the dynamic linkers live in /lib.
++ We default to soft-float, EL. */
++#undef MUSL_DYNAMIC_LINKER
++#if TARGET_BIG_ENDIAN_DEFAULT
++#define MUSL_DYNAMIC_LINKER_E "%{mlittle-endian:;:eb}"
++#else
++#define MUSL_DYNAMIC_LINKER_E "%{mbig-endian:eb}"
++#endif
++#define MUSL_DYNAMIC_LINKER \
++ "/lib/ld-musl-arm" MUSL_DYNAMIC_LINKER_E "%{mfloat-abi=hard:hf}.so.1"
++
+ /* At this point, bpabi.h will have clobbered LINK_SPEC. We want to
+ use the GNU/Linux version, not the generic BPABI version. */
+ #undef LINK_SPEC
+diff -Nur gcc-5.3.0.orig/gcc/config/i386/linux64.h gcc-5.3.0/gcc/config/i386/linux64.h
+--- gcc-5.3.0.orig/gcc/config/i386/linux64.h 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/gcc/config/i386/linux64.h 2015-12-08 05:53:22.243521385 +0100
+@@ -30,3 +30,7 @@
+ #define GLIBC_DYNAMIC_LINKER32 "/lib/ld-linux.so.2"
+ #define GLIBC_DYNAMIC_LINKER64 "/lib64/ld-linux-x86-64.so.2"
+ #define GLIBC_DYNAMIC_LINKERX32 "/libx32/ld-linux-x32.so.2"
++
++#define MUSL_DYNAMIC_LINKER32 "/lib/ld-musl-i386.so.1"
++#define MUSL_DYNAMIC_LINKER64 "/lib/ld-musl-x86_64.so.1"
++#define MUSL_DYNAMIC_LINKERX32 "/lib/ld-musl-x32.so.1"
+diff -Nur gcc-5.3.0.orig/gcc/config/i386/linux.h gcc-5.3.0/gcc/config/i386/linux.h
+--- gcc-5.3.0.orig/gcc/config/i386/linux.h 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/gcc/config/i386/linux.h 2015-12-08 05:53:22.243521385 +0100
+@@ -21,3 +21,4 @@
+
+ #define GNU_USER_LINK_EMULATION "elf_i386"
+ #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
++#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-i386.so.1"
+diff -Nur gcc-5.3.0.orig/gcc/config/linux.h gcc-5.3.0/gcc/config/linux.h
+--- gcc-5.3.0.orig/gcc/config/linux.h 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/gcc/config/linux.h 2015-12-08 05:53:22.243521385 +0100
+@@ -32,10 +32,12 @@
+ #define OPTION_GLIBC (DEFAULT_LIBC == LIBC_GLIBC)
+ #define OPTION_UCLIBC (DEFAULT_LIBC == LIBC_UCLIBC)
+ #define OPTION_BIONIC (DEFAULT_LIBC == LIBC_BIONIC)
++#define OPTION_MUSL (DEFAULT_LIBC == LIBC_MUSL)
+ #else
+ #define OPTION_GLIBC (linux_libc == LIBC_GLIBC)
+ #define OPTION_UCLIBC (linux_libc == LIBC_UCLIBC)
+ #define OPTION_BIONIC (linux_libc == LIBC_BIONIC)
++#define OPTION_MUSL (linux_libc == LIBC_MUSL)
+ #endif
+
+ #define GNU_USER_TARGET_OS_CPP_BUILTINS() \
+@@ -53,18 +55,21 @@
+ uClibc or Bionic is the default C library and whether
+ -muclibc or -mglibc or -mbionic has been passed to change the default. */
+
+-#define CHOOSE_DYNAMIC_LINKER1(LIBC1, LIBC2, LIBC3, LD1, LD2, LD3) \
+- "%{" LIBC2 ":" LD2 ";:%{" LIBC3 ":" LD3 ";:" LD1 "}}"
++#define CHOOSE_DYNAMIC_LINKER1(LIBC1, LIBC2, LIBC3, LIBC4, LD1, LD2, LD3, LD4) \
++ "%{" LIBC2 ":" LD2 ";:%{" LIBC3 ":" LD3 ";:%{" LIBC4 ":" LD4 ";:" LD1 "}}}"
+
+ #if DEFAULT_LIBC == LIBC_GLIBC
+-#define CHOOSE_DYNAMIC_LINKER(G, U, B) \
+- CHOOSE_DYNAMIC_LINKER1 ("mglibc", "muclibc", "mbionic", G, U, B)
++#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \
++ CHOOSE_DYNAMIC_LINKER1 ("mglibc", "muclibc", "mbionic", "mmusl", G, U, B, M)
+ #elif DEFAULT_LIBC == LIBC_UCLIBC
+-#define CHOOSE_DYNAMIC_LINKER(G, U, B) \
+- CHOOSE_DYNAMIC_LINKER1 ("muclibc", "mglibc", "mbionic", U, G, B)
++#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \
++ CHOOSE_DYNAMIC_LINKER1 ("muclibc", "mglibc", "mbionic", "mmusl", U, G, B, M)
+ #elif DEFAULT_LIBC == LIBC_BIONIC
+-#define CHOOSE_DYNAMIC_LINKER(G, U, B) \
+- CHOOSE_DYNAMIC_LINKER1 ("mbionic", "mglibc", "muclibc", B, G, U)
++#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \
++ CHOOSE_DYNAMIC_LINKER1 ("mbionic", "mglibc", "muclibc", "mmusl", B, G, U, M)
++#elif DEFAULT_LIBC == LIBC_MUSL
++#define CHOOSE_DYNAMIC_LINKER(G, U, B, M) \
++ CHOOSE_DYNAMIC_LINKER1 ("mmusl", "mglibc", "muclibc", "mbionic", M, G, U, B)
+ #else
+ #error "Unsupported DEFAULT_LIBC"
+ #endif /* DEFAULT_LIBC */
+@@ -84,21 +89,92 @@
+
+ #define GNU_USER_DYNAMIC_LINKER \
+ CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER, \
+- BIONIC_DYNAMIC_LINKER)
++ BIONIC_DYNAMIC_LINKER, MUSL_DYNAMIC_LINKER)
+ #define GNU_USER_DYNAMIC_LINKER32 \
+ CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32, \
+- BIONIC_DYNAMIC_LINKER32)
++ BIONIC_DYNAMIC_LINKER32, MUSL_DYNAMIC_LINKER32)
+ #define GNU_USER_DYNAMIC_LINKER64 \
+ CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64, \
+- BIONIC_DYNAMIC_LINKER64)
++ BIONIC_DYNAMIC_LINKER64, MUSL_DYNAMIC_LINKER64)
+ #define GNU_USER_DYNAMIC_LINKERX32 \
+ CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKERX32, UCLIBC_DYNAMIC_LINKERX32, \
+- BIONIC_DYNAMIC_LINKERX32)
++ BIONIC_DYNAMIC_LINKERX32, MUSL_DYNAMIC_LINKERX32)
+
+ /* Whether we have Bionic libc runtime */
+ #undef TARGET_HAS_BIONIC
+ #define TARGET_HAS_BIONIC (OPTION_BIONIC)
+
++/* musl avoids problematic includes by rearranging the include directories.
++ * Unfortunately, this is mostly duplicated from cppdefault.c */
++#if DEFAULT_LIBC == LIBC_MUSL
++#define INCLUDE_DEFAULTS_MUSL_GPP \
++ { GPLUSPLUS_INCLUDE_DIR, "G++", 1, 1, \
++ GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 }, \
++ { GPLUSPLUS_TOOL_INCLUDE_DIR, "G++", 1, 1, \
++ GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 1 }, \
++ { GPLUSPLUS_BACKWARD_INCLUDE_DIR, "G++", 1, 1, \
++ GPLUSPLUS_INCLUDE_DIR_ADD_SYSROOT, 0 },
++
++#ifdef LOCAL_INCLUDE_DIR
++#define INCLUDE_DEFAULTS_MUSL_LOCAL \
++ { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 2 }, \
++ { LOCAL_INCLUDE_DIR, 0, 0, 1, 1, 0 },
++#else
++#define INCLUDE_DEFAULTS_MUSL_LOCAL
++#endif
++
++#ifdef PREFIX_INCLUDE_DIR
++#define INCLUDE_DEFAULTS_MUSL_PREFIX \
++ { PREFIX_INCLUDE_DIR, 0, 0, 1, 0, 0},
++#else
++#define INCLUDE_DEFAULTS_MUSL_PREFIX
++#endif
++
++#ifdef CROSS_INCLUDE_DIR
++#define INCLUDE_DEFAULTS_MUSL_CROSS \
++ { CROSS_INCLUDE_DIR, "GCC", 0, 0, 0, 0},
++#else
++#define INCLUDE_DEFAULTS_MUSL_CROSS
++#endif
++
++#ifdef TOOL_INCLUDE_DIR
++#define INCLUDE_DEFAULTS_MUSL_TOOL \
++ { TOOL_INCLUDE_DIR, "BINUTILS", 0, 1, 0, 0},
++#else
++#define INCLUDE_DEFAULTS_MUSL_TOOL
++#endif
++
++#ifdef NATIVE_SYSTEM_HEADER_DIR
++#define INCLUDE_DEFAULTS_MUSL_NATIVE \
++ { NATIVE_SYSTEM_HEADER_DIR, 0, 0, 0, 1, 2 }, \
++ { NATIVE_SYSTEM_HEADER_DIR, 0, 0, 0, 1, 0 },
++#else
++#define INCLUDE_DEFAULTS_MUSL_NATIVE
++#endif
++
++#if defined (CROSS_DIRECTORY_STRUCTURE) && !defined (TARGET_SYSTEM_ROOT)
++# undef INCLUDE_DEFAULTS_MUSL_LOCAL
++# define INCLUDE_DEFAULTS_MUSL_LOCAL
++# undef INCLUDE_DEFAULTS_MUSL_NATIVE
++# define INCLUDE_DEFAULTS_MUSL_NATIVE
++#else
++# undef INCLUDE_DEFAULTS_MUSL_CROSS
++# define INCLUDE_DEFAULTS_MUSL_CROSS
++#endif
++
++#undef INCLUDE_DEFAULTS
++#define INCLUDE_DEFAULTS \
++ { \
++ INCLUDE_DEFAULTS_MUSL_GPP \
++ INCLUDE_DEFAULTS_MUSL_PREFIX \
++ INCLUDE_DEFAULTS_MUSL_CROSS \
++ INCLUDE_DEFAULTS_MUSL_TOOL \
++ INCLUDE_DEFAULTS_MUSL_NATIVE \
++ { GCC_INCLUDE_DIR, "GCC", 0, 1, 0, 0 }, \
++ { 0, 0, 0, 0, 0, 0 } \
++ }
++#endif
++
+ #if (DEFAULT_LIBC == LIBC_UCLIBC) && defined (SINGLE_LIBC) /* uClinux */
+ /* This is a *uclinux* target. We don't define below macros to normal linux
+ versions, because doing so would require *uclinux* targets to include
+diff -Nur gcc-5.3.0.orig/gcc/config/linux.opt gcc-5.3.0/gcc/config/linux.opt
+--- gcc-5.3.0.orig/gcc/config/linux.opt 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/gcc/config/linux.opt 2015-12-08 05:53:22.243521385 +0100
+@@ -30,3 +30,7 @@
+ muclibc
+ Target Report RejectNegative Var(linux_libc,LIBC_UCLIBC) Negative(mbionic)
+ Use uClibc C library
++
++mmusl
++Target Report RejectNegative Var(linux_libc,LIBC_MUSL) Negative(mglibc)
++Use musl C library
+diff -Nur gcc-5.3.0.orig/gcc/config/microblaze/linux.h gcc-5.3.0/gcc/config/microblaze/linux.h
+--- gcc-5.3.0.orig/gcc/config/microblaze/linux.h 2015-05-28 16:08:19.000000000 +0200
++++ gcc-5.3.0/gcc/config/microblaze/linux.h 2015-12-08 05:53:22.243521385 +0100
+@@ -28,7 +28,22 @@
+ #undef TLS_NEEDS_GOT
+ #define TLS_NEEDS_GOT 1
+
+-#define DYNAMIC_LINKER "/lib/ld.so.1"
++#if TARGET_BIG_ENDIAN_DEFAULT == 0 /* LE */
++#define MUSL_DYNAMIC_LINKER_E "%{EB:;:el}"
++#else
++#define MUSL_DYNAMIC_LINKER_E "%{EL:el}"
++#endif
++
++#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-microblaze" MUSL_DYNAMIC_LINKER_E ".so.1"
++#define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
++
++#if DEFAULT_LIBC == LIBC_MUSL
++#define DYNAMIC_LINKER MUSL_DYNAMIC_LINKER
++#else
++#define DYNAMIC_LINKER GLIBC_DYNAMIC_LINKER
++#endif
++
++
+ #undef SUBTARGET_EXTRA_SPECS
+ #define SUBTARGET_EXTRA_SPECS \
+ { "dynamic_linker", DYNAMIC_LINKER }
+diff -Nur gcc-5.3.0.orig/gcc/config/microblaze/microblaze.h gcc-5.3.0/gcc/config/microblaze/microblaze.h
+--- gcc-5.3.0.orig/gcc/config/microblaze/microblaze.h 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/gcc/config/microblaze/microblaze.h 2015-12-08 05:53:22.243521385 +0100
+@@ -218,6 +218,12 @@
+ #undef PTRDIFF_TYPE
+ #define PTRDIFF_TYPE "int"
+
++#undef SIZE_TYPE
++#define SIZE_TYPE "unsigned int"
++
++#undef PTRDIFF_TYPE
++#define PTRDIFF_TYPE "int"
++
+ #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
+ ((TREE_CODE (EXP) == STRING_CST || TREE_CODE (EXP) == CONSTRUCTOR) \
+ && (ALIGN) < BITS_PER_WORD \
+diff -Nur gcc-5.3.0.orig/gcc/config/mips/linux.h gcc-5.3.0/gcc/config/mips/linux.h
+--- gcc-5.3.0.orig/gcc/config/mips/linux.h 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/gcc/config/mips/linux.h 2015-12-08 05:53:22.243521385 +0100
+@@ -31,13 +31,26 @@
+ #undef UCLIBC_DYNAMIC_LINKER32
+ #define UCLIBC_DYNAMIC_LINKER32 \
+ "%{mnan=2008:/lib/ld-uClibc-mipsn8.so.0;:/lib/ld-uClibc.so.0}"
++
++#if TARGET_ENDIAN_DEFAULT == 0 /* LE */
++#define MUSL_DYNAMIC_LINKER_E "%{EB:;:el}"
++#else
++#define MUSL_DYNAMIC_LINKER_E "%{EL:el}"
++#endif
++#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-mips" MUSL_DYNAMIC_LINKER_E "%{msoft-float:-sf}.so.1"
+ #undef UCLIBC_DYNAMIC_LINKER64
+ #define UCLIBC_DYNAMIC_LINKER64 \
+ "%{mnan=2008:/lib/ld64-uClibc-mipsn8.so.0;:/lib/ld64-uClibc.so.0}"
+ #define UCLIBC_DYNAMIC_LINKERN32 \
+ "%{mnan=2008:/lib32/ld-uClibc-mipsn8.so.0;:/lib32/ld-uClibc.so.0}"
+
++#undef MUSL_DYNAMIC_LINKER32
++#define MUSL_DYNAMIC_LINKER32 "/lib/ld-musl-mips%{EL:el}%{msoft-float:-sf}.so.1"
++#undef MUSL_DYNAMIC_LINKER64
++#define MUSL_DYNAMIC_LINKER64 "/lib/ld-musl-mips64%{EL:el}%{msoft-float:-sf}.so.1"
++#define MUSL_DYNAMIC_LINKERN32 "/lib/ld-musl-mipsn32%{EL:el}%{msoft-float:-sf}.so.1"
++
+ #define BIONIC_DYNAMIC_LINKERN32 "/system/bin/linker32"
+ #define GNU_USER_DYNAMIC_LINKERN32 \
+ CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKERN32, UCLIBC_DYNAMIC_LINKERN32, \
+- BIONIC_DYNAMIC_LINKERN32)
++ BIONIC_DYNAMIC_LINKERN32, MUSL_DYNAMIC_LINKERN32)
+diff -Nur gcc-5.3.0.orig/gcc/config/rs6000/linux64.h gcc-5.3.0/gcc/config/rs6000/linux64.h
+--- gcc-5.3.0.orig/gcc/config/rs6000/linux64.h 2015-03-10 00:18:57.000000000 +0100
++++ gcc-5.3.0/gcc/config/rs6000/linux64.h 2015-12-08 05:53:22.243521385 +0100
+@@ -365,17 +365,21 @@
+ #endif
+ #define UCLIBC_DYNAMIC_LINKER32 "/lib/ld-uClibc.so.0"
+ #define UCLIBC_DYNAMIC_LINKER64 "/lib/ld64-uClibc.so.0"
++#define MUSL_DYNAMIC_LINKER32 "/lib/ld-musl-powerpc.so.1"
++#define MUSL_DYNAMIC_LINKER64 "/lib/ld-musl-powerpc64.so.1"
+ #if DEFAULT_LIBC == LIBC_UCLIBC
+-#define CHOOSE_DYNAMIC_LINKER(G, U) "%{mglibc:" G ";:" U "}"
++#define CHOOSE_DYNAMIC_LINKER(G, U, M) "%{mglibc:" G ";:%{mmusl:" M ";:" U "}}"
+ #elif DEFAULT_LIBC == LIBC_GLIBC
+-#define CHOOSE_DYNAMIC_LINKER(G, U) "%{muclibc:" U ";:" G "}"
++#define CHOOSE_DYNAMIC_LINKER(G, U, M) "%{muclibc:" U ";:%{mmusl:" M ";:" G "}}"
++#elif DEFAULT_LIBC == LIBC_MUSL
++#define CHOOSE_DYNAMIC_LINKER(G, U, M) "%{mglibc:" G ";:%{muclibc:" U ";:" M "}}"
+ #else
+ #error "Unsupported DEFAULT_LIBC"
+ #endif
+ #define GNU_USER_DYNAMIC_LINKER32 \
+- CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32)
++ CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER32, UCLIBC_DYNAMIC_LINKER32, MUSL_DYNAMIC_LINKER32)
+ #define GNU_USER_DYNAMIC_LINKER64 \
+- CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64)
++ CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER64, UCLIBC_DYNAMIC_LINKER64, MUSL_DYNAMIC_LINKER64)
+
+ #undef DEFAULT_ASM_ENDIAN
+ #if (TARGET_DEFAULT & MASK_LITTLE_ENDIAN)
+diff -Nur gcc-5.3.0.orig/gcc/config/rs6000/secureplt.h gcc-5.3.0/gcc/config/rs6000/secureplt.h
+--- gcc-5.3.0.orig/gcc/config/rs6000/secureplt.h 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/gcc/config/rs6000/secureplt.h 2015-12-08 05:53:22.243521385 +0100
+@@ -18,3 +18,4 @@
+ <http://www.gnu.org/licenses/>. */
+
+ #define CC1_SECURE_PLT_DEFAULT_SPEC "-msecure-plt"
++#define LINK_SECURE_PLT_DEFAULT_SPEC "--secure-plt"
+diff -Nur gcc-5.3.0.orig/gcc/config/rs6000/sysv4.h gcc-5.3.0/gcc/config/rs6000/sysv4.h
+--- gcc-5.3.0.orig/gcc/config/rs6000/sysv4.h 2015-09-24 15:46:45.000000000 +0200
++++ gcc-5.3.0/gcc/config/rs6000/sysv4.h 2015-12-08 05:53:22.243521385 +0100
+@@ -537,6 +537,9 @@
+ #ifndef CC1_SECURE_PLT_DEFAULT_SPEC
+ #define CC1_SECURE_PLT_DEFAULT_SPEC ""
+ #endif
++#ifndef LINK_SECURE_PLT_DEFAULT_SPEC
++#define LINK_SECURE_PLT_DEFAULT_SPEC ""
++#endif
+
+ /* Pass -G xxx to the compiler. */
+ #undef CC1_SPEC
+@@ -759,15 +762,18 @@
+
+ #define GLIBC_DYNAMIC_LINKER "/lib/ld.so.1"
+ #define UCLIBC_DYNAMIC_LINKER "/lib/ld-uClibc.so.0"
++#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-powerpc.so.1"
+ #if DEFAULT_LIBC == LIBC_UCLIBC
+-#define CHOOSE_DYNAMIC_LINKER(G, U) "%{mglibc:" G ";:" U "}"
++#define CHOOSE_DYNAMIC_LINKER(G, U, M) "%{mglibc:" G ";:%{mmusl:" M ";:" U "}}"
++#elif DEFAULT_LIBC == LIBC_MUSL
++#define CHOOSE_DYNAMIC_LINKER(G, U, M) "%{mglibc:" G ";:%{muclibc:" U ";:" M "}}"
+ #elif !defined (DEFAULT_LIBC) || DEFAULT_LIBC == LIBC_GLIBC
+-#define CHOOSE_DYNAMIC_LINKER(G, U) "%{muclibc:" U ";:" G "}"
++#define CHOOSE_DYNAMIC_LINKER(G, U, M) "%{muclibc:" U ";:%{mmusl:" M ";:" G "}}"
+ #else
+ #error "Unsupported DEFAULT_LIBC"
+ #endif
+ #define GNU_USER_DYNAMIC_LINKER \
+- CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER)
++ CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER, MUSL_DYNAMIC_LINKER)
+
+ #define LINK_OS_LINUX_SPEC "-m elf32ppclinux %{!shared: %{!static: \
+ %{rdynamic:-export-dynamic} \
+@@ -889,6 +895,7 @@
+ { "link_os_openbsd", LINK_OS_OPENBSD_SPEC }, \
+ { "link_os_default", LINK_OS_DEFAULT_SPEC }, \
+ { "cc1_secure_plt_default", CC1_SECURE_PLT_DEFAULT_SPEC }, \
++ { "link_secure_plt_default", LINK_SECURE_PLT_DEFAULT_SPEC }, \
+ { "cpp_os_ads", CPP_OS_ADS_SPEC }, \
+ { "cpp_os_yellowknife", CPP_OS_YELLOWKNIFE_SPEC }, \
+ { "cpp_os_mvme", CPP_OS_MVME_SPEC }, \
+diff -Nur gcc-5.3.0.orig/gcc/config/sh/linux.h gcc-5.3.0/gcc/config/sh/linux.h
+--- gcc-5.3.0.orig/gcc/config/sh/linux.h 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/gcc/config/sh/linux.h 2015-12-08 05:53:22.243521385 +0100
+@@ -43,7 +43,14 @@
+
+ #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
+
++#if TARGET_BIG_ENDIAN_DEFAULT /* BE */
++#define MUSL_DYNAMIC_LINKER_E "eb"
++#else
++#define MUSL_DYNAMIC_LINKER_E
++#endif
++
+ #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
++#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-sh" MUSL_DYNAMIC_LINKER_E ".so.1"
+
+ #undef SUBTARGET_LINK_EMUL_SUFFIX
+ #define SUBTARGET_LINK_EMUL_SUFFIX "_linux"
+diff -Nur gcc-5.3.0.orig/gcc/config.gcc gcc-5.3.0/gcc/config.gcc
+--- gcc-5.3.0.orig/gcc/config.gcc 2015-09-10 16:17:53.000000000 +0200
++++ gcc-5.3.0/gcc/config.gcc 2015-12-08 05:53:22.247521539 +0100
+@@ -575,7 +575,7 @@
+ esac
+
+ # Common C libraries.
+-tm_defines="$tm_defines LIBC_GLIBC=1 LIBC_UCLIBC=2 LIBC_BIONIC=3"
++tm_defines="$tm_defines LIBC_GLIBC=1 LIBC_UCLIBC=2 LIBC_BIONIC=3 LIBC_MUSL=4"
+
+ # 32-bit x86 processors supported by --with-arch=. Each processor
+ # MUST be separated by exactly one space.
+@@ -720,6 +720,9 @@
+ *-*-*uclibc*)
+ tm_defines="$tm_defines DEFAULT_LIBC=LIBC_UCLIBC"
+ ;;
++ *-*-*musl*)
++ tm_defines="$tm_defines DEFAULT_LIBC=LIBC_MUSL"
++ ;;
+ *)
+ tm_defines="$tm_defines DEFAULT_LIBC=LIBC_GLIBC"
+ ;;
+@@ -2413,6 +2416,10 @@
+ powerpc*-*-linux*paired*)
+ tm_file="${tm_file} rs6000/750cl.h" ;;
+ esac
++ case ${target} in
++ *-linux*-musl*)
++ enable_secureplt=yes ;;
++ esac
+ if test x${enable_secureplt} = xyes; then
+ tm_file="rs6000/secureplt.h ${tm_file}"
+ fi
+diff -Nur gcc-5.3.0.orig/gcc/configure gcc-5.3.0/gcc/configure
+--- gcc-5.3.0.orig/gcc/configure 2015-11-19 14:32:10.000000000 +0100
++++ gcc-5.3.0/gcc/configure 2015-12-08 05:53:22.251521693 +0100
+@@ -27802,6 +27802,9 @@
+ else
+ gcc_cv_libc_provides_ssp=no
+ case "$target" in
++ *-*-musl*)
++ # All versions of musl provide stack protector
++ gcc_cv_libc_provides_ssp=yes;;
+ *-*-linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu)
+ # glibc 2.4 and later provides __stack_chk_fail and
+ # either __stack_chk_guard, or TLS access to stack guard canary.
+@@ -27834,6 +27837,7 @@
+ # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
+ # simply assert that glibc does provide this, which is true for all
+ # realistically usable GNU/Hurd configurations.
++ # All supported versions of musl provide it as well
+ gcc_cv_libc_provides_ssp=yes;;
+ *-*-darwin* | *-*-freebsd*)
+ ac_fn_c_check_func "$LINENO" "__stack_chk_fail" "ac_cv_func___stack_chk_fail"
+@@ -27930,6 +27934,9 @@
+ gcc_cv_target_dl_iterate_phdr=no
+ fi
+ ;;
++ *-linux-musl*)
++ gcc_cv_target_dl_iterate_phdr=yes
++ ;;
+ esac
+
+ if test x$gcc_cv_target_dl_iterate_phdr = xyes; then
+diff -Nur gcc-5.3.0.orig/gcc/configure.ac gcc-5.3.0/gcc/configure.ac
+--- gcc-5.3.0.orig/gcc/configure.ac 2015-11-19 14:32:10.000000000 +0100
++++ gcc-5.3.0/gcc/configure.ac 2015-12-08 05:53:22.255521847 +0100
+@@ -5282,6 +5282,9 @@
+ gcc_cv_libc_provides_ssp,
+ [gcc_cv_libc_provides_ssp=no
+ case "$target" in
++ *-*-musl*)
++ # All versions of musl provide stack protector
++ gcc_cv_libc_provides_ssp=yes;;
+ *-*-linux* | *-*-kfreebsd*-gnu | *-*-knetbsd*-gnu)
+ # glibc 2.4 and later provides __stack_chk_fail and
+ # either __stack_chk_guard, or TLS access to stack guard canary.
+@@ -5308,6 +5311,7 @@
+ # <http://gcc.gnu.org/ml/gcc/2008-10/msg00130.html>) and for now
+ # simply assert that glibc does provide this, which is true for all
+ # realistically usable GNU/Hurd configurations.
++ # All supported versions of musl provide it as well
+ gcc_cv_libc_provides_ssp=yes;;
+ *-*-darwin* | *-*-freebsd*)
+ AC_CHECK_FUNC(__stack_chk_fail,[gcc_cv_libc_provides_ssp=yes],
+@@ -5381,6 +5385,9 @@
+ gcc_cv_target_dl_iterate_phdr=no
+ fi
+ ;;
++ *-linux-musl*)
++ gcc_cv_target_dl_iterate_phdr=yes
++ ;;
+ esac
+ GCC_TARGET_TEMPLATE([TARGET_DL_ITERATE_PHDR])
+ if test x$gcc_cv_target_dl_iterate_phdr = xyes; then
+diff -Nur gcc-5.3.0.orig/gcc/gcc.c gcc-5.3.0/gcc/gcc.c
+--- gcc-5.3.0.orig/gcc/gcc.c 2015-03-10 10:37:41.000000000 +0100
++++ gcc-5.3.0/gcc/gcc.c 2015-12-08 05:53:22.255521847 +0100
+@@ -729,7 +729,7 @@
+ #ifndef LINK_SSP_SPEC
+ #ifdef TARGET_LIBC_PROVIDES_SSP
+ #define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all" \
+- "|fstack-protector-strong|fstack-protector-explicit:}"
++ "|fstack-protector-strong|fstack-protector-explicit:-lssp_nonshared}"
+ #else
+ #define LINK_SSP_SPEC "%{fstack-protector|fstack-protector-all" \
+ "|fstack-protector-strong|fstack-protector-explicit" \
+diff -Nur gcc-5.3.0.orig/gcc/ginclude/stddef.h gcc-5.3.0/gcc/ginclude/stddef.h
+--- gcc-5.3.0.orig/gcc/ginclude/stddef.h 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/gcc/ginclude/stddef.h 2015-12-08 05:53:22.255521847 +0100
+@@ -184,6 +184,7 @@
+ #ifndef _GCC_SIZE_T
+ #ifndef _SIZET_
+ #ifndef __size_t
++#ifndef __DEFINED_size_t /* musl */
+ #define __size_t__ /* BeOS */
+ #define __SIZE_T__ /* Cray Unicos/Mk */
+ #define _SIZE_T
+@@ -200,6 +201,7 @@
+ #define ___int_size_t_h
+ #define _GCC_SIZE_T
+ #define _SIZET_
++#define __DEFINED_size_t /* musl */
+ #if (defined (__FreeBSD__) && (__FreeBSD__ >= 5)) \
+ || defined(__DragonFly__) \
+ || defined(__FreeBSD_kernel__)
+@@ -218,6 +220,7 @@
+ typedef long ssize_t;
+ #endif /* __BEOS__ */
+ #endif /* !(defined (__GNUG__) && defined (size_t)) */
++#endif /* __DEFINED_size_t */
+ #endif /* __size_t */
+ #endif /* _SIZET_ */
+ #endif /* _GCC_SIZE_T */
+diff -Nur gcc-5.3.0.orig/libgcc/unwind-dw2-fde-dip.c gcc-5.3.0/libgcc/unwind-dw2-fde-dip.c
+--- gcc-5.3.0.orig/libgcc/unwind-dw2-fde-dip.c 2015-01-27 11:02:26.000000000 +0100
++++ gcc-5.3.0/libgcc/unwind-dw2-fde-dip.c 2015-12-08 05:53:22.255521847 +0100
+@@ -46,6 +46,10 @@
+ #include "unwind-compat.h"
+ #include "gthr.h"
+
++#if !defined(inhibit_libc) && defined(HAVE_LD_EH_FRAME_HDR) && defined(TARGET_DL_ITERATE_PHDR)
++# define USE_PT_GNU_EH_FRAME
++#endif
++
+ #if !defined(inhibit_libc) && defined(HAVE_LD_EH_FRAME_HDR) \
+ && (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ > 2) \
+ || (__GLIBC__ == 2 && __GLIBC_MINOR__ == 2 && defined(DT_CONFIG)))
+diff -Nur gcc-5.3.0.orig/libgomp/config/posix/time.c gcc-5.3.0/libgomp/config/posix/time.c
+--- gcc-5.3.0.orig/libgomp/config/posix/time.c 2015-01-10 20:10:37.000000000 +0100
++++ gcc-5.3.0/libgomp/config/posix/time.c 2015-12-08 05:53:22.255521847 +0100
+@@ -29,6 +29,8 @@
+ The following implementation uses the most simple POSIX routines.
+ If present, POSIX 4 clocks should be used instead. */
+
++#define _POSIX_C_SOURCE 199309L /* for clocks */
++
+ #include "libgomp.h"
+ #include <unistd.h>
+ #if TIME_WITH_SYS_TIME
+diff -Nur gcc-5.3.0.orig/libitm/config/arm/hwcap.cc gcc-5.3.0/libitm/config/arm/hwcap.cc
+--- gcc-5.3.0.orig/libitm/config/arm/hwcap.cc 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/libitm/config/arm/hwcap.cc 2015-12-08 05:53:22.255521847 +0100
+@@ -40,7 +40,11 @@
+
+ #ifdef __linux__
+ #include <unistd.h>
++#ifdef __GLIBC__
+ #include <sys/fcntl.h>
++#else
++#include <fcntl.h>
++#endif
+ #include <elf.h>
+
+ static void __attribute__((constructor))
+diff -Nur gcc-5.3.0.orig/libitm/config/linux/x86/tls.h gcc-5.3.0/libitm/config/linux/x86/tls.h
+--- gcc-5.3.0.orig/libitm/config/linux/x86/tls.h 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/libitm/config/linux/x86/tls.h 2015-12-08 05:53:22.255521847 +0100
+@@ -25,16 +25,19 @@
+ #ifndef LIBITM_X86_TLS_H
+ #define LIBITM_X86_TLS_H 1
+
+-#if defined(__GLIBC_PREREQ) && __GLIBC_PREREQ(2, 10)
++#if defined(__GLIBC_PREREQ)
++#if __GLIBC_PREREQ(2, 10)
+ /* Use slots in the TCB head rather than __thread lookups.
+ GLIBC has reserved words 10 through 13 for TM. */
+ #define HAVE_ARCH_GTM_THREAD 1
+ #define HAVE_ARCH_GTM_THREAD_DISP 1
+ #endif
++#endif
+
+ #include "config/generic/tls.h"
+
+-#if defined(__GLIBC_PREREQ) && __GLIBC_PREREQ(2, 10)
++#if defined(__GLIBC_PREREQ)
++#if __GLIBC_PREREQ(2, 10)
+ namespace GTM HIDDEN {
+
+ #ifdef __x86_64__
+@@ -101,5 +104,6 @@
+
+ } // namespace GTM
+ #endif /* >= GLIBC 2.10 */
++#endif
+
+ #endif // LIBITM_X86_TLS_H
+diff -Nur gcc-5.3.0.orig/libstdc++-v3/configure.host gcc-5.3.0/libstdc++-v3/configure.host
+--- gcc-5.3.0.orig/libstdc++-v3/configure.host 2015-06-24 11:59:28.000000000 +0200
++++ gcc-5.3.0/libstdc++-v3/configure.host 2015-12-08 05:53:22.255521847 +0100
+@@ -274,6 +274,13 @@
+ os_include_dir="os/bsd/freebsd"
+ ;;
+ gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
++ # check for musl by target
++ case "${host_os}" in
++ *-musl*)
++ os_include_dir="os/generic"
++ ;;
++ *)
++
+ if [ "$uclibc" = "yes" ]; then
+ os_include_dir="os/uclibc"
+ elif [ "$bionic" = "yes" ]; then
+@@ -282,6 +289,9 @@
+ os_include_dir="os/gnu-linux"
+ fi
+ ;;
++
++ esac
++ ;;
+ hpux*)
+ os_include_dir="os/hpux"
+ ;;
diff --git a/package/gcc/patches/5.3.0/ia64-fix-libgcc.patch b/package/gcc/patches/5.3.0/ia64-fix-libgcc.patch
new file mode 100644
index 000000000..cdbbd6000
--- /dev/null
+++ b/package/gcc/patches/5.3.0/ia64-fix-libgcc.patch
@@ -0,0 +1,30 @@
+diff -Nur gcc-4.9.3.orig/libgcc/config/ia64/fde-glibc.c gcc-4.9.3/libgcc/config/ia64/fde-glibc.c
+--- gcc-4.9.3.orig/libgcc/config/ia64/fde-glibc.c 2014-01-02 23:25:22.000000000 +0100
++++ gcc-4.9.3/libgcc/config/ia64/fde-glibc.c 2015-12-01 07:06:43.963906167 +0100
+@@ -25,6 +25,8 @@
+ /* Locate the FDE entry for a given address, using glibc ld.so routines
+ to avoid register/deregister calls at DSO load/unload. */
+
++#ifndef inhibit_libc
++
+ #ifndef _GNU_SOURCE
+ #define _GNU_SOURCE 1
+ #endif
+@@ -159,3 +161,4 @@
+
+ return data.ret;
+ }
++#endif
+diff -Nur gcc-4.9.3.orig/libgcc/unwind-generic.h gcc-4.9.3/libgcc/unwind-generic.h
+--- gcc-4.9.3.orig/libgcc/unwind-generic.h 2014-01-02 23:25:22.000000000 +0100
++++ gcc-4.9.3/libgcc/unwind-generic.h 2015-12-01 07:00:15.731287428 +0100
+@@ -221,7 +221,9 @@
+ compatible with the standard ABI for IA-64, we inline these. */
+
+ #ifdef __ia64__
++#ifndef inhibit_libc
+ #include <stdlib.h>
++#endif
+
+ static inline _Unwind_Ptr
+ _Unwind_GetDataRelBase (struct _Unwind_Context *_C)
diff --git a/package/gcc/patches/5.3.0/libstdcxx-uclibc-c99.patch b/package/gcc/patches/5.3.0/libstdcxx-uclibc-c99.patch
new file mode 100644
index 000000000..fcf2af8d5
--- /dev/null
+++ b/package/gcc/patches/5.3.0/libstdcxx-uclibc-c99.patch
@@ -0,0 +1,237 @@
+diff -Nur gcc-5.3.0.orig/libstdc++-v3/config/locale/generic/c_locale.h gcc-5.3.0/libstdc++-v3/config/locale/generic/c_locale.h
+--- gcc-5.3.0.orig/libstdc++-v3/config/locale/generic/c_locale.h 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/libstdc++-v3/config/locale/generic/c_locale.h 2015-12-06 09:10:01.383992311 +0100
+@@ -70,7 +70,7 @@
+ __builtin_va_list __args;
+ __builtin_va_start(__args, __fmt);
+
+-#ifdef _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+ const int __ret = __builtin_vsnprintf(__out, __size, __fmt, __args);
+ #else
+ const int __ret = __builtin_vsprintf(__out, __fmt, __args);
+diff -Nur gcc-5.3.0.orig/libstdc++-v3/config/locale/gnu/c_locale.h gcc-5.3.0/libstdc++-v3/config/locale/gnu/c_locale.h
+--- gcc-5.3.0.orig/libstdc++-v3/config/locale/gnu/c_locale.h 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/libstdc++-v3/config/locale/gnu/c_locale.h 2015-12-06 09:10:01.383992311 +0100
+@@ -88,7 +88,7 @@
+ __builtin_va_list __args;
+ __builtin_va_start(__args, __fmt);
+
+-#ifdef _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+ const int __ret = __builtin_vsnprintf(__out, __size, __fmt, __args);
+ #else
+ const int __ret = __builtin_vsprintf(__out, __fmt, __args);
+diff -Nur gcc-5.3.0.orig/libstdc++-v3/include/bits/basic_string.h gcc-5.3.0/libstdc++-v3/include/bits/basic_string.h
+--- gcc-5.3.0.orig/libstdc++-v3/include/bits/basic_string.h 2015-11-25 17:11:33.000000000 +0100
++++ gcc-5.3.0/libstdc++-v3/include/bits/basic_string.h 2015-12-06 09:10:01.383992311 +0100
+@@ -5246,7 +5246,7 @@
+ _GLIBCXX_END_NAMESPACE_VERSION
+ } // namespace
+
+-#if __cplusplus >= 201103L && defined(_GLIBCXX_USE_C99)
++#if __cplusplus >= 201103L && (defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__))
+
+ #include <ext/string_conversions.h>
+
+diff -Nur gcc-5.3.0.orig/libstdc++-v3/include/bits/locale_facets_nonio.tcc gcc-5.3.0/libstdc++-v3/include/bits/locale_facets_nonio.tcc
+--- gcc-5.3.0.orig/libstdc++-v3/include/bits/locale_facets_nonio.tcc 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/libstdc++-v3/include/bits/locale_facets_nonio.tcc 2015-12-06 09:10:01.383992311 +0100
+@@ -578,7 +578,7 @@
+ {
+ const locale __loc = __io.getloc();
+ const ctype<_CharT>& __ctype = use_facet<ctype<_CharT> >(__loc);
+-#ifdef _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+ // First try a buffer perhaps big enough.
+ int __cs_size = 64;
+ char* __cs = static_cast<char*>(__builtin_alloca(__cs_size));
+diff -Nur gcc-5.3.0.orig/libstdc++-v3/include/bits/locale_facets.tcc gcc-5.3.0/libstdc++-v3/include/bits/locale_facets.tcc
+--- gcc-5.3.0.orig/libstdc++-v3/include/bits/locale_facets.tcc 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/libstdc++-v3/include/bits/locale_facets.tcc 2015-12-06 09:10:32.189186155 +0100
+@@ -992,7 +992,7 @@
+ char __fbuf[16];
+ __num_base::_S_format_float(__io, __fbuf, __mod);
+
+-#ifdef _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+ // Precision is always used except for hexfloat format.
+ const bool __use_prec =
+ (__io.flags() & ios_base::floatfield) != ios_base::floatfield;
+diff -Nur gcc-5.3.0.orig/libstdc++-v3/include/c_compatibility/math.h gcc-5.3.0/libstdc++-v3/include/c_compatibility/math.h
+--- gcc-5.3.0.orig/libstdc++-v3/include/c_compatibility/math.h 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/libstdc++-v3/include/c_compatibility/math.h 2015-12-06 09:10:01.383992311 +0100
+@@ -56,7 +56,7 @@
+ using std::floor;
+ using std::fmod;
+
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+ using std::fpclassify;
+ using std::isfinite;
+ using std::isinf;
+diff -Nur gcc-5.3.0.orig/libstdc++-v3/include/c_compatibility/wchar.h gcc-5.3.0/libstdc++-v3/include/c_compatibility/wchar.h
+--- gcc-5.3.0.orig/libstdc++-v3/include/c_compatibility/wchar.h 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/libstdc++-v3/include/c_compatibility/wchar.h 2015-12-06 09:10:01.383992311 +0100
+@@ -103,7 +103,7 @@
+ using std::wmemset;
+ using std::wcsftime;
+
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+ using std::wcstold;
+ using std::wcstoll;
+ using std::wcstoull;
+diff -Nur gcc-5.3.0.orig/libstdc++-v3/include/c_global/cstdio gcc-5.3.0/libstdc++-v3/include/c_global/cstdio
+--- gcc-5.3.0.orig/libstdc++-v3/include/c_global/cstdio 2015-02-01 16:11:08.000000000 +0100
++++ gcc-5.3.0/libstdc++-v3/include/c_global/cstdio 2015-12-06 09:10:01.383992311 +0100
+@@ -146,7 +146,7 @@
+ using ::vsprintf;
+ } // namespace
+
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+
+ #undef snprintf
+ #undef vfscanf
+diff -Nur gcc-5.3.0.orig/libstdc++-v3/include/c_global/cstdlib gcc-5.3.0/libstdc++-v3/include/c_global/cstdlib
+--- gcc-5.3.0.orig/libstdc++-v3/include/c_global/cstdlib 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/libstdc++-v3/include/c_global/cstdlib 2015-12-06 09:10:01.383992311 +0100
+@@ -195,7 +195,7 @@
+ _GLIBCXX_END_NAMESPACE_VERSION
+ } // namespace
+
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+
+ #undef _Exit
+ #undef llabs
+diff -Nur gcc-5.3.0.orig/libstdc++-v3/include/c_global/cwchar gcc-5.3.0/libstdc++-v3/include/c_global/cwchar
+--- gcc-5.3.0.orig/libstdc++-v3/include/c_global/cwchar 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/libstdc++-v3/include/c_global/cwchar 2015-12-06 09:10:01.383992311 +0100
+@@ -232,7 +232,7 @@
+ _GLIBCXX_END_NAMESPACE_VERSION
+ } // namespace
+
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+
+ #undef wcstold
+ #undef wcstoll
+@@ -289,7 +289,7 @@
+ using std::vwscanf;
+ #endif
+
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+ using std::wcstold;
+ using std::wcstoll;
+ using std::wcstoull;
+diff -Nur gcc-5.3.0.orig/libstdc++-v3/include/c_std/cstdio gcc-5.3.0/libstdc++-v3/include/c_std/cstdio
+--- gcc-5.3.0.orig/libstdc++-v3/include/c_std/cstdio 2015-02-01 16:11:08.000000000 +0100
++++ gcc-5.3.0/libstdc++-v3/include/c_std/cstdio 2015-12-06 09:10:01.383992311 +0100
+@@ -144,7 +144,7 @@
+ using ::vsprintf;
+ } // namespace std
+
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+
+ #undef snprintf
+ #undef vfscanf
+diff -Nur gcc-5.3.0.orig/libstdc++-v3/include/c_std/cstdlib gcc-5.3.0/libstdc++-v3/include/c_std/cstdlib
+--- gcc-5.3.0.orig/libstdc++-v3/include/c_std/cstdlib 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/libstdc++-v3/include/c_std/cstdlib 2015-12-06 09:10:01.383992311 +0100
+@@ -192,7 +192,7 @@
+ _GLIBCXX_END_NAMESPACE_VERSION
+ } // namespace
+
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+
+ #undef _Exit
+ #undef llabs
+diff -Nur gcc-5.3.0.orig/libstdc++-v3/include/c_std/cwchar gcc-5.3.0/libstdc++-v3/include/c_std/cwchar
+--- gcc-5.3.0.orig/libstdc++-v3/include/c_std/cwchar 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/libstdc++-v3/include/c_std/cwchar 2015-12-06 09:10:01.383992311 +0100
+@@ -228,7 +228,7 @@
+ _GLIBCXX_END_NAMESPACE_VERSION
+ } // namespace
+
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+
+ #undef wcstold
+ #undef wcstoll
+diff -Nur gcc-5.3.0.orig/libstdc++-v3/include/ext/vstring.h gcc-5.3.0/libstdc++-v3/include/ext/vstring.h
+--- gcc-5.3.0.orig/libstdc++-v3/include/ext/vstring.h 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/libstdc++-v3/include/ext/vstring.h 2015-12-06 09:10:01.387992466 +0100
+@@ -2680,7 +2680,7 @@
+ _GLIBCXX_END_NAMESPACE_VERSION
+ } // namespace
+
+-#if ((__cplusplus >= 201103L) && defined(_GLIBCXX_USE_C99))
++#if ((__cplusplus >= 201103L) && (defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)))
+
+ #include <ext/string_conversions.h>
+
+diff -Nur gcc-5.3.0.orig/libstdc++-v3/include/tr1/cstdio gcc-5.3.0/libstdc++-v3/include/tr1/cstdio
+--- gcc-5.3.0.orig/libstdc++-v3/include/tr1/cstdio 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/libstdc++-v3/include/tr1/cstdio 2015-12-06 09:10:01.395992777 +0100
+@@ -33,7 +33,7 @@
+
+ #include <cstdio>
+
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+
+ namespace std _GLIBCXX_VISIBILITY(default)
+ {
+diff -Nur gcc-5.3.0.orig/libstdc++-v3/include/tr1/cstdlib gcc-5.3.0/libstdc++-v3/include/tr1/cstdlib
+--- gcc-5.3.0.orig/libstdc++-v3/include/tr1/cstdlib 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/libstdc++-v3/include/tr1/cstdlib 2015-12-06 09:10:01.395992777 +0100
+@@ -35,7 +35,7 @@
+
+ #if _GLIBCXX_HOSTED
+
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+
+ namespace std _GLIBCXX_VISIBILITY(default)
+ {
+diff -Nur gcc-5.3.0.orig/libstdc++-v3/include/tr1/cwchar gcc-5.3.0/libstdc++-v3/include/tr1/cwchar
+--- gcc-5.3.0.orig/libstdc++-v3/include/tr1/cwchar 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/libstdc++-v3/include/tr1/cwchar 2015-12-06 09:10:01.395992777 +0100
+@@ -52,7 +52,7 @@
+ using std::vwscanf;
+ #endif
+
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+ using std::wcstold;
+ using std::wcstoll;
+ using std::wcstoull;
+diff -Nur gcc-5.3.0.orig/libstdc++-v3/include/tr1/stdlib.h gcc-5.3.0/libstdc++-v3/include/tr1/stdlib.h
+--- gcc-5.3.0.orig/libstdc++-v3/include/tr1/stdlib.h 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/libstdc++-v3/include/tr1/stdlib.h 2015-12-06 09:10:01.395992777 +0100
+@@ -33,7 +33,7 @@
+
+ #if _GLIBCXX_HOSTED
+
+-#if _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+
+ using std::tr1::atoll;
+ using std::tr1::strtoll;
+diff -Nur gcc-5.3.0.orig/libstdc++-v3/src/c++11/debug.cc gcc-5.3.0/libstdc++-v3/src/c++11/debug.cc
+--- gcc-5.3.0.orig/libstdc++-v3/src/c++11/debug.cc 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.3.0/libstdc++-v3/src/c++11/debug.cc 2015-12-06 09:10:01.395992777 +0100
+@@ -788,7 +788,7 @@
+ int __n __attribute__ ((__unused__)),
+ const char* __fmt, _Tp __s) const throw ()
+ {
+-#ifdef _GLIBCXX_USE_C99
++#if defined(_GLIBCXX_USE_C99) || defined(__UCLIBC__)
+ std::snprintf(__buf, __n, __fmt, __s);
+ #else
+ std::sprintf(__buf, __fmt, __s);
diff --git a/package/gcc/patches/5.3.0/m68k-disable-atomic-uclinux.patch b/package/gcc/patches/5.3.0/m68k-disable-atomic-uclinux.patch
new file mode 100644
index 000000000..4ab553218
--- /dev/null
+++ b/package/gcc/patches/5.3.0/m68k-disable-atomic-uclinux.patch
@@ -0,0 +1,12 @@
+diff -Nur gcc-4.8.3.orig/libgcc/config.host gcc-4.8.3/libgcc/config.host
+--- gcc-4.8.3.orig/libgcc/config.host 2014-03-20 17:12:30.000000000 +0100
++++ gcc-4.8.3/libgcc/config.host 2014-07-26 13:15:06.359463368 +0200
+@@ -689,7 +689,7 @@
+ m68k*-*-openbsd*)
+ ;;
+ m68k-*-uclinux*) # Motorola m68k/ColdFire running uClinux with uClibc
+- tmake_file="$tmake_file m68k/t-floatlib m68k/t-linux"
++ tmake_file="$tmake_file m68k/t-floatlib"
+ md_unwind_header=m68k/linux-unwind.h
+ ;;
+ m68k-*-linux*) # Motorola m68k's running GNU/Linux
diff --git a/package/gcc/patches/5.3.0/tile-fix-libgcc.patch b/package/gcc/patches/5.3.0/tile-fix-libgcc.patch
new file mode 100644
index 000000000..07aa97200
--- /dev/null
+++ b/package/gcc/patches/5.3.0/tile-fix-libgcc.patch
@@ -0,0 +1,41 @@
+diff -Nur gcc-5.2.0.orig/gcc/config/tilegx/linux.h gcc-5.2.0/gcc/config/tilegx/linux.h
+--- gcc-5.2.0.orig/gcc/config/tilegx/linux.h 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.2.0/gcc/config/tilegx/linux.h 2015-12-02 15:13:59.563521746 +0100
+@@ -55,8 +55,6 @@
+ /* For __clear_cache in libgcc2.c. */
+ #ifdef IN_LIBGCC2
+
+-#include <arch/icache.h>
+-
+ /* Use the minimum page size of 4K. Alternatively we can call
+ getpagesize() but it introduces a libc dependence. */
+ #undef CLEAR_INSN_CACHE
+diff -Nur gcc-5.2.0.orig/libgcc/config/tilepro/atomic.h gcc-5.2.0/libgcc/config/tilepro/atomic.h
+--- gcc-5.2.0.orig/libgcc/config/tilepro/atomic.h 2015-01-05 13:33:28.000000000 +0100
++++ gcc-5.2.0/libgcc/config/tilepro/atomic.h 2015-12-02 15:41:08.868942210 +0100
+@@ -46,6 +46,11 @@
+ The "exchange" and "compare and exchange" macros may also take
+ pointer values. We use the pseudo-type "VAL" in the documentation
+ to indicate the use of an appropriate type. */
++
++#ifndef SPR_CMPEXCH_VALUE
++#define SPR_CMPEXCH_VALUE 0x2780
++#endif
++
+ #else
+ /* Atomic instruction macros
+
+@@ -92,13 +97,6 @@
+ compare-and-exchange routine, so may be potentially less efficient. */
+ #endif
+
+-#ifdef __tilegx__
+-#include <arch/spr_def.h>
+-#else
+-#include <asm/unistd.h>
+-#endif
+-
+-
+ /* 32-bit integer compare-and-exchange. */
+ static __inline __attribute__ ((always_inline))
+ int arch_atomic_val_compare_and_exchange_4 (volatile int *mem,
diff --git a/package/gcc/patches/5.3.0/uclibc-cmath-long-double.patch b/package/gcc/patches/5.3.0/uclibc-cmath-long-double.patch
new file mode 100644
index 000000000..9ea5dc38f
--- /dev/null
+++ b/package/gcc/patches/5.3.0/uclibc-cmath-long-double.patch
@@ -0,0 +1,434 @@
+diff -Nur gcc-4.9.2.orig/libstdc++-v3/include/c_global/cmath gcc-4.9.2/libstdc++-v3/include/c_global/cmath
+--- gcc-4.9.2.orig/libstdc++-v3/include/c_global/cmath 2014-01-02 16:30:10.000000000 -0600
++++ gcc-4.9.2/libstdc++-v3/include/c_global/cmath 2015-06-02 20:29:58.615890169 -0500
+@@ -1041,143 +1041,213 @@
+ // functions
+ using ::acosh;
+ using ::acoshf;
++#ifdef __LONG_DOUBLE_128__
+ using ::acoshl;
++#endif
+
+ using ::asinh;
+ using ::asinhf;
++#ifdef __LONG_DOUBLE_128__
+ using ::asinhl;
++#endif
+
+ using ::atanh;
+ using ::atanhf;
++#ifdef __LONG_DOUBLE_128__
+ using ::atanhl;
++#endif
+
+ using ::cbrt;
+ using ::cbrtf;
++#ifdef __LONG_DOUBLE_128__
+ using ::cbrtl;
++#endif
+
+ using ::copysign;
+ using ::copysignf;
++#ifdef __LONG_DOUBLE_128__
+ using ::copysignl;
++#endif
+
+ using ::erf;
+ using ::erff;
++#ifdef __LONG_DOUBLE_128__
+ using ::erfl;
++#endif
+
+ using ::erfc;
+ using ::erfcf;
++#ifdef __LONG_DOUBLE_128__
+ using ::erfcl;
++#endif
+
+ using ::exp2;
+ using ::exp2f;
++#ifdef __LONG_DOUBLE_128__
+ using ::exp2l;
++#endif
+
+ using ::expm1;
+ using ::expm1f;
++#ifdef __LONG_DOUBLE_128__
+ using ::expm1l;
++#endif
+
+ using ::fdim;
+ using ::fdimf;
++#ifdef __LONG_DOUBLE_128__
+ using ::fdiml;
++#endif
+
+ using ::fma;
+ using ::fmaf;
++#ifdef __LONG_DOUBLE_128__
+ using ::fmal;
++#endif
+
+ using ::fmax;
+ using ::fmaxf;
++#ifdef __LONG_DOUBLE_128__
+ using ::fmaxl;
++#endif
+
+ using ::fmin;
+ using ::fminf;
++#ifdef __LONG_DOUBLE_128__
+ using ::fminl;
++#endif
+
+ using ::hypot;
+ using ::hypotf;
++#ifdef __LONG_DOUBLE_128__
+ using ::hypotl;
++#endif
+
+ using ::ilogb;
+ using ::ilogbf;
++#ifdef __LONG_DOUBLE_128__
+ using ::ilogbl;
++#endif
+
+ using ::lgamma;
+ using ::lgammaf;
++#ifdef __LONG_DOUBLE_128__
+ using ::lgammal;
++#endif
+
+ using ::llrint;
+ using ::llrintf;
++#ifdef __LONG_DOUBLE_128__
+ using ::llrintl;
++#endif
+
+ using ::llround;
+ using ::llroundf;
++#ifdef __LONG_DOUBLE_128__
+ using ::llroundl;
++#endif
+
+ using ::log1p;
+ using ::log1pf;
++#ifdef __LONG_DOUBLE_128__
+ using ::log1pl;
++#endif
+
+ using ::log2;
+ using ::log2f;
++#ifdef __LONG_DOUBLE_128__
+ using ::log2l;
++#endif
+
+ using ::logb;
+ using ::logbf;
++#ifdef __LONG_DOUBLE_128__
+ using ::logbl;
++#endif
+
+ using ::lrint;
+ using ::lrintf;
++#ifdef __LONG_DOUBLE_128__
+ using ::lrintl;
++#endif
+
+ using ::lround;
+ using ::lroundf;
++#ifdef __LONG_DOUBLE_128__
+ using ::lroundl;
++#endif
+
+ using ::nan;
+ using ::nanf;
++#ifdef __LONG_DOUBLE_128__
+ using ::nanl;
++#endif
+
+ using ::nearbyint;
+ using ::nearbyintf;
++#ifdef __LONG_DOUBLE_128__
+ using ::nearbyintl;
++#endif
+
+ using ::nextafter;
+ using ::nextafterf;
++#ifdef __LONG_DOUBLE_128__
+ using ::nextafterl;
++#endif
+
+ using ::nexttoward;
+ using ::nexttowardf;
++#ifdef __LONG_DOUBLE_128__
+ using ::nexttowardl;
++#endif
+
+ using ::remainder;
+ using ::remainderf;
++#ifdef __LONG_DOUBLE_128__
+ using ::remainderl;
++#endif
+
+ using ::remquo;
+ using ::remquof;
++#ifdef __LONG_DOUBLE_128__
+ using ::remquol;
++#endif
+
+ using ::rint;
+ using ::rintf;
++#ifdef __LONG_DOUBLE_128__
+ using ::rintl;
++#endif
+
+ using ::round;
+ using ::roundf;
++#ifdef __LONG_DOUBLE_128__
+ using ::roundl;
++#endif
+
+ using ::scalbln;
+ using ::scalblnf;
++#ifdef __LONG_DOUBLE_128__
+ using ::scalblnl;
++#endif
+
+ using ::scalbn;
+ using ::scalbnf;
++#ifdef __LONG_DOUBLE_128__
+ using ::scalbnl;
++#endif
+
+ using ::tgamma;
+ using ::tgammaf;
++#ifdef __LONG_DOUBLE_128__
+ using ::tgammal;
++#endif
+
+ using ::trunc;
+ using ::truncf;
++#ifdef __LONG_DOUBLE_128__
+ using ::truncl;
++#endif
+
+ /// Additional overloads.
+ constexpr float
+diff -Nur gcc-4.9.2.orig/libstdc++-v3/include/tr1/cmath gcc-4.9.2/libstdc++-v3/include/tr1/cmath
+--- gcc-4.9.2.orig/libstdc++-v3/include/tr1/cmath 2014-01-02 16:30:10.000000000 -0600
++++ gcc-4.9.2/libstdc++-v3/include/tr1/cmath 2015-06-02 20:29:58.619890102 -0500
+@@ -158,143 +158,213 @@
+ // functions
+ using ::acosh;
+ using ::acoshf;
++#ifdef __LONG_DOUBLE_128__
+ using ::acoshl;
++#endif
+
+ using ::asinh;
+ using ::asinhf;
++#ifdef __LONG_DOUBLE_128__
+ using ::asinhl;
++#endif
+
+ using ::atanh;
+ using ::atanhf;
++#ifdef __LONG_DOUBLE_128__
+ using ::atanhl;
++#endif
+
+ using ::cbrt;
+ using ::cbrtf;
++#ifdef __LONG_DOUBLE_128__
+ using ::cbrtl;
++#endif
+
+ using ::copysign;
+ using ::copysignf;
++#ifdef __LONG_DOUBLE_128__
+ using ::copysignl;
++#endif
+
+ using ::erf;
+ using ::erff;
++#ifdef __LONG_DOUBLE_128__
+ using ::erfl;
++#endif
+
+ using ::erfc;
+ using ::erfcf;
++#ifdef __LONG_DOUBLE_128__
+ using ::erfcl;
++#endif
+
+ using ::exp2;
+ using ::exp2f;
++#ifdef __LONG_DOUBLE_128__
+ using ::exp2l;
++#endif
+
+ using ::expm1;
+ using ::expm1f;
++#ifdef __LONG_DOUBLE_128__
+ using ::expm1l;
++#endif
+
+ using ::fdim;
+ using ::fdimf;
++#ifdef __LONG_DOUBLE_128__
+ using ::fdiml;
++#endif
+
+ using ::fma;
+ using ::fmaf;
++#ifdef __LONG_DOUBLE_128__
+ using ::fmal;
++#endif
+
+ using ::fmax;
+ using ::fmaxf;
++#ifdef __LONG_DOUBLE_128__
+ using ::fmaxl;
++#endif
+
+ using ::fmin;
+ using ::fminf;
++#ifdef __LONG_DOUBLE_128__
+ using ::fminl;
++#endif
+
+ using ::hypot;
+ using ::hypotf;
++#ifdef __LONG_DOUBLE_128__
+ using ::hypotl;
++#endif
+
+ using ::ilogb;
+ using ::ilogbf;
++#ifdef __LONG_DOUBLE_128__
+ using ::ilogbl;
++#endif
+
+ using ::lgamma;
+ using ::lgammaf;
++#ifdef __LONG_DOUBLE_128__
+ using ::lgammal;
++#endif
+
+ using ::llrint;
+ using ::llrintf;
++#ifdef __LONG_DOUBLE_128__
+ using ::llrintl;
++#endif
+
+ using ::llround;
+ using ::llroundf;
++#ifdef __LONG_DOUBLE_128__
+ using ::llroundl;
++#endif
+
+ using ::log1p;
+ using ::log1pf;
++#ifdef __LONG_DOUBLE_128__
+ using ::log1pl;
++#endif
+
+ using ::log2;
+ using ::log2f;
++#ifdef __LONG_DOUBLE_128__
+ using ::log2l;
++#endif
+
+ using ::logb;
+ using ::logbf;
++#ifdef __LONG_DOUBLE_128__
+ using ::logbl;
++#endif
+
+ using ::lrint;
+ using ::lrintf;
++#ifdef __LONG_DOUBLE_128__
+ using ::lrintl;
++#endif
+
+ using ::lround;
+ using ::lroundf;
++#ifdef __LONG_DOUBLE_128__
+ using ::lroundl;
++#endif
+
+ using ::nan;
+ using ::nanf;
++#ifdef __LONG_DOUBLE_128__
+ using ::nanl;
++#endif
+
+ using ::nearbyint;
+ using ::nearbyintf;
++#ifdef __LONG_DOUBLE_128__
+ using ::nearbyintl;
++#endif
+
+ using ::nextafter;
+ using ::nextafterf;
++#ifdef __LONG_DOUBLE_128__
+ using ::nextafterl;
++#endif
+
+ using ::nexttoward;
+ using ::nexttowardf;
++#ifdef __LONG_DOUBLE_128__
+ using ::nexttowardl;
++#endif
+
+ using ::remainder;
+ using ::remainderf;
++#ifdef __LONG_DOUBLE_128__
+ using ::remainderl;
++#endif
+
+ using ::remquo;
+ using ::remquof;
++#ifdef __LONG_DOUBLE_128__
+ using ::remquol;
++#endif
+
+ using ::rint;
+ using ::rintf;
++#ifdef __LONG_DOUBLE_128__
+ using ::rintl;
++#endif
+
+ using ::round;
+ using ::roundf;
++#ifdef __LONG_DOUBLE_128__
+ using ::roundl;
++#endif
+
+ using ::scalbln;
+ using ::scalblnf;
++#ifdef __LONG_DOUBLE_128__
+ using ::scalblnl;
++#endif
+
+ using ::scalbn;
+ using ::scalbnf;
++#ifdef __LONG_DOUBLE_128__
+ using ::scalbnl;
++#endif
+
+ using ::tgamma;
+ using ::tgammaf;
++#ifdef __LONG_DOUBLE_128__
+ using ::tgammal;
++#endif
+
+ using ::trunc;
+ using ::truncf;
++#ifdef __LONG_DOUBLE_128__
+ using ::truncl;
++#endif
+
+ #endif
+
--
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