gcc: update gcc 5.x musl patches

This replaces the musl patches for gcc with the versions which are in
gcc trunk.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

SVN-Revision: 46873

15 files changed, 612 insertions, 200 deletions

diff --git a/toolchain/gcc/patches/5.2.0/200-musl_config.patch b/toolchain/gcc/patches/5.2.0/200-musl_config.patch
index c6887a1bff..a2b41b3726 100644
--- a/toolchain/gcc/patches/5.2.0/200-musl_config.patch
+++ b/toolchain/gcc/patches/5.2.0/200-musl_config.patch
@@ -1,3 +1,30 @@
+From: ktkachov <ktkachov@138bc75d-0d04-0410-961f-82ee72b054a4>
+Date: Fri, 8 May 2015 08:25:47 +0000 (+0000)
+Subject: [PATCH 2/13] musl libc config
+X-Git-Url: https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff_plain;h=a9173ceabaf29c16f8ef226fbf98af373a4b2ceb
+
+[PATCH 2/13] musl libc config
+
+2015-05-08  Gregor Richards  <gregor.richards@uwaterloo.ca>
+	    Szabolcs Nagy  <szabolcs.nagy@arm.com>
+
+	* config.gcc (LIBC_MUSL): New tm_defines macro.
+	* config/linux.h (OPTION_MUSL): Define.
+	(MUSL_DYNAMIC_LINKER, MUSL_DYNAMIC_LINKER32,)
+	(MUSL_DYNAMIC_LINKER64, MUSL_DYNAMIC_LINKERX32,)
+	(INCLUDE_DEFAULTS_MUSL_GPP, INCLUDE_DEFAULTS_MUSL_LOCAL,)
+	(INCLUDE_DEFAULTS_MUSL_PREFIX, INCLUDE_DEFAULTS_MUSL_CROSS,)
+	(INCLUDE_DEFAULTS_MUSL_TOOL, INCLUDE_DEFAULTS_MUSL_NATIVE): Define.
+	* config/linux.opt (mmusl): New option.
+	* doc/invoke.texi (GNU/Linux Options): Document -mmusl.
+	* configure.ac (gcc_cv_libc_provides_ssp): Add *-*-musl*.
+	(gcc_cv_target_dl_iterate_phdr): Add *-linux-musl*.
+	* configure: Regenerate.
+
+
+git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@222904 138bc75d-0d04-0410-961f-82ee72b054a4
+---
+
 --- a/gcc/config.gcc
 +++ b/gcc/config.gcc
 @@ -575,7 +575,7 @@ case ${target} in
@@ -34,9 +61,15 @@
  #endif
  
  #define GNU_USER_TARGET_OS_CPP_BUILTINS()			\
-@@ -53,18 +55,21 @@ see the files COPYING3 and COPYING.RUNTI
-    uClibc or Bionic is the default C library and whether
-    -muclibc or -mglibc or -mbionic has been passed to change the default.  */
+@@ -50,21 +52,25 @@ see the files COPYING3 and COPYING.RUNTI
+     } while (0)
+ 
+ /* Determine which dynamic linker to use depending on whether GLIBC or
+-   uClibc or Bionic is the default C library and whether
+-   -muclibc or -mglibc or -mbionic has been passed to change the default.  */
++   uClibc or Bionic or musl is the default C library and whether
++   -muclibc or -mglibc or -mbionic or -mmusl has been passed to change
++   the default.  */
  
 -#define CHOOSE_DYNAMIC_LINKER1(LIBC1, LIBC2, LIBC3, LD1, LD2, LD3)	\
 -  "%{" LIBC2 ":" LD2 ";:%{" LIBC3 ":" LD3 ";:" LD1 "}}"
@@ -64,7 +97,15 @@
  #else
  #error "Unsupported DEFAULT_LIBC"
  #endif /* DEFAULT_LIBC */
-@@ -84,21 +89,92 @@ see the files COPYING3 and COPYING.RUNTI
+@@ -81,24 +87,100 @@ see the files COPYING3 and COPYING.RUNTI
+ #define BIONIC_DYNAMIC_LINKER32 "/system/bin/linker"
+ #define BIONIC_DYNAMIC_LINKER64 "/system/bin/linker64"
+ #define BIONIC_DYNAMIC_LINKERX32 "/system/bin/linkerx32"
++/* Should be redefined for each target that supports musl.  */
++#define MUSL_DYNAMIC_LINKER "/dev/null"
++#define MUSL_DYNAMIC_LINKER32 "/dev/null"
++#define MUSL_DYNAMIC_LINKER64 "/dev/null"
++#define MUSL_DYNAMIC_LINKERX32 "/dev/null"
  
  #define GNU_USER_DYNAMIC_LINKER						\
    CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER,	\
@@ -163,37 +204,106 @@
     versions, because doing so would require *uclinux* targets to include
 --- a/gcc/config/linux.opt
 +++ b/gcc/config/linux.opt
-@@ -30,3 +30,7 @@ Use GNU C library
+@@ -28,5 +28,9 @@ Target Report RejectNegative Var(linux_l
+ Use GNU C library
+ 
  muclibc
- Target Report RejectNegative Var(linux_libc,LIBC_UCLIBC) Negative(mbionic)
+-Target Report RejectNegative Var(linux_libc,LIBC_UCLIBC) Negative(mbionic)
++Target Report RejectNegative Var(linux_libc,LIBC_UCLIBC) Negative(mmusl)
  Use uClibc C library
 +
 +mmusl
-+Target Report RejectNegative Var(linux_libc,LIBC_MUSL) Negative(mglibc)
++Target Report RejectNegative Var(linux_libc,LIBC_MUSL) Negative(mbionic)
 +Use musl C library
---- a/gcc/ginclude/stddef.h
-+++ b/gcc/ginclude/stddef.h
-@@ -184,6 +184,7 @@ typedef __PTRDIFF_TYPE__ ptrdiff_t;
- #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 @@ typedef __PTRDIFF_TYPE__ ptrdiff_t;
- #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 __SIZE_TYPE__ size_t;
- 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 */
+--- a/gcc/configure
++++ b/gcc/configure
+@@ -27742,6 +27742,9 @@ if test "${gcc_cv_libc_provides_ssp+set}
+ else
+   gcc_cv_libc_provides_ssp=no
+     case "$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.
+@@ -27774,6 +27777,7 @@ fi
+ 	 # <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 "$LINENO" "__stack_chk_fail" "ac_cv_func___stack_chk_fail"
+@@ -27870,6 +27874,9 @@ case "$target" in
+       gcc_cv_target_dl_iterate_phdr=no
+     fi
+     ;;
++  *-linux-musl*)
++    gcc_cv_target_dl_iterate_phdr=yes
++    ;;
+ esac
+ 
+ if test x$gcc_cv_target_dl_iterate_phdr = xyes; then
+--- a/gcc/configure.ac
++++ b/gcc/configure.ac
+@@ -5229,6 +5229,9 @@ AC_CACHE_CHECK(__stack_chk_fail in targe
+       gcc_cv_libc_provides_ssp,
+       [gcc_cv_libc_provides_ssp=no
+     case "$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.
+@@ -5255,6 +5258,7 @@ AC_CACHE_CHECK(__stack_chk_fail in targe
+ 	 # <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],
+@@ -5328,6 +5332,9 @@ case "$target" in
+       gcc_cv_target_dl_iterate_phdr=no
+     fi
+     ;;
++  *-linux-musl*)
++    gcc_cv_target_dl_iterate_phdr=yes
++    ;;
+ esac
+ GCC_TARGET_TEMPLATE([TARGET_DL_ITERATE_PHDR])
+ if test x$gcc_cv_target_dl_iterate_phdr = xyes; then
+--- a/gcc/doc/invoke.texi
++++ b/gcc/doc/invoke.texi
+@@ -667,7 +667,7 @@ Objective-C and Objective-C++ Dialects}.
+ -mcpu=@var{cpu}}
+ 
+ @emph{GNU/Linux Options}
+-@gccoptlist{-mglibc -muclibc -mbionic -mandroid @gol
++@gccoptlist{-mglibc -muclibc -mmusl -mbionic -mandroid @gol
+ -tno-android-cc -tno-android-ld}
+ 
+ @emph{H8/300 Options}
+@@ -15324,13 +15324,19 @@ These @samp{-m} options are defined for
+ @item -mglibc
+ @opindex mglibc
+ Use the GNU C library.  This is the default except
+-on @samp{*-*-linux-*uclibc*} and @samp{*-*-linux-*android*} targets.
++on @samp{*-*-linux-*uclibc*}, @samp{*-*-linux-*musl*} and
++@samp{*-*-linux-*android*} targets.
+ 
+ @item -muclibc
+ @opindex muclibc
+ Use uClibc C library.  This is the default on
+ @samp{*-*-linux-*uclibc*} targets.
+ 
++@item -mmusl
++@opindex mmusl
++Use the musl C library.  This is the default on
++@samp{*-*-linux-*musl*} targets.
++
+ @item -mbionic
+ @opindex mbionic
+ Use Bionic C library.  This is the default on
diff --git a/toolchain/gcc/patches/5.2.0/201-musl_arm.patch b/toolchain/gcc/patches/5.2.0/201-musl_arm.patch
index a0f7577bb7..27a26afc05 100644
--- a/toolchain/gcc/patches/5.2.0/201-musl_arm.patch
+++ b/toolchain/gcc/patches/5.2.0/201-musl_arm.patch
@@ -1,7 +1,9 @@
-From ec39b7c91facdd74fddea95128502c25ec3948a3 Mon Sep 17 00:00:00 2001
 From: ktkachov <ktkachov@138bc75d-0d04-0410-961f-82ee72b054a4>
-Date: Wed, 27 May 2015 13:17:11 +0000
-Subject: [PATCH 11/12] [PATCH 4/13] arm musl support
+Date: Wed, 27 May 2015 13:17:11 +0000 (+0000)
+Subject: [PATCH 4/13] arm musl support
+X-Git-Url: https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff_plain;h=de799bd087ab9a179768fea75bd195a31d3432a4
+
+[PATCH 4/13] arm musl support
 
 On behalf of szabolcs.nagy@arm.com
 
@@ -9,10 +11,9 @@ On behalf of szabolcs.nagy@arm.com
 
 	* config/arm/linux-eabi.h (MUSL_DYNAMIC_LINKER): Define.
 
+
 git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@223749 138bc75d-0d04-0410-961f-82ee72b054a4
 ---
- gcc/config/arm/linux-eabi.h | 17 +++++++++++++++++
- 1 file changed, 17 insertions(+)
 
 --- a/gcc/config/arm/linux-eabi.h
 +++ b/gcc/config/arm/linux-eabi.h
@@ -40,17 +41,3 @@ git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@223749 138bc75d-0d04-0410-961f-8
  /* 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
---- a/libitm/config/arm/hwcap.cc
-+++ b/libitm/config/arm/hwcap.cc
-@@ -40,7 +40,11 @@ int GTM_hwcap HIDDEN = 0
- 
- #ifdef __linux__
- #include <unistd.h>
-+#ifdef __GLIBC__
- #include <sys/fcntl.h>
-+#else
-+#include <fcntl.h>
-+#endif
- #include <elf.h>
- 
- static void __attribute__((constructor))
diff --git a/toolchain/gcc/patches/5.2.0/202-musl_mips.patch b/toolchain/gcc/patches/5.2.0/202-musl_mips.patch
index 07d9c96e1c..816dd8d101 100644
--- a/toolchain/gcc/patches/5.2.0/202-musl_mips.patch
+++ b/toolchain/gcc/patches/5.2.0/202-musl_mips.patch
@@ -1,7 +1,9 @@
-From 8de85695e46ed2bc57c3482b4f995be3a82c405e Mon Sep 17 00:00:00 2001
 From: ktkachov <ktkachov@138bc75d-0d04-0410-961f-82ee72b054a4>
-Date: Fri, 8 May 2015 15:16:50 +0000
-Subject: [PATCH 09/12] [PATCH 6/13] mips musl support
+Date: Fri, 8 May 2015 15:16:50 +0000 (+0000)
+Subject: [PATCH 6/13] mips musl support
+X-Git-Url: https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff_plain;h=2550b6a866c887472b587bef87d433c51cf1ebc8
+
+[PATCH 6/13] mips musl support
 
 2015-05-08  Gregor Richards  <gregor.richards@uwaterloo.ca>
 	    Szabolcs Nagy  <szabolcs.nagy@arm.com>
@@ -10,10 +12,9 @@ Subject: [PATCH 09/12] [PATCH 6/13] mips musl support
 	(MUSL_DYNAMIC_LINKER64, MUSL_DYNAMIC_LINKERN32): Define.
 	(GNU_USER_DYNAMIC_LINKERN32): Update.
 
+
 git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@222915 138bc75d-0d04-0410-961f-82ee72b054a4
 ---
- gcc/config/mips/linux.h | 8 +++++++-
- 1 file changed, 7 insertions(+), 1 deletion(-)
 
 --- a/gcc/config/mips/linux.h
 +++ b/gcc/config/mips/linux.h
diff --git a/toolchain/gcc/patches/5.2.0/203-musl_powerpc.patch b/toolchain/gcc/patches/5.2.0/203-musl_powerpc.patch
index 925acb333a..8c0a4cc81f 100644
--- a/toolchain/gcc/patches/5.2.0/203-musl_powerpc.patch
+++ b/toolchain/gcc/patches/5.2.0/203-musl_powerpc.patch
@@ -1,24 +1,35 @@
---- a/gcc/config.gcc
-+++ b/gcc/config.gcc
-@@ -2410,6 +2410,10 @@ powerpc*-*-linux*)
- 	    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
+
+gcc/Changelog:
+
+2015-04-24  Gregor Richards  <gregor.richards@uwaterloo.ca>
+	    Szabolcs Nagy  <szabolcs.nagy@arm.com>
+
+	* config.gcc (secure_plt): Add *-linux*-musl*.
+	* config/rs6000/linux64.h (MUSL_DYNAMIC_LINKER32): Define.
+	(MUSL_DYNAMIC_LINKER64): Define.
+	(GNU_USER_DYNAMIC_LINKER32): Update.
+	(GNU_USER_DYNAMIC_LINKER64): Update.
+	(CHOOSE_DYNAMIC_LINKER): Update.
+
+	* config/rs6000/secureplt.h (LINK_SECURE_PLT_DEFAULT_SPEC): Define.
+	* config/rs6000/sysv4.h (GNU_USER_DYNAMIC_LINKER): Update.
+	(MUSL_DYNAMIC_LINKER, MUSL_DYNAMIC_LINKER_E,)
+	(INCLUDE_DEFAULTS_MUSL_GPP, INCLUDE_DEFAULTS_MUSL_LOCAL,)
+	(INCLUDE_DEFAULTS_MUSL_PREFIX, INCLUDE_DEFAULTS_MUSL_CROSS,)
+	(INCLUDE_DEFAULTS_MUSL_TOOL, INCLUDE_DEFAULTS_MUSL_NATIVE): Define.
+	(LINK_SECURE_PLT_DEFAULT_SPEC): Define.
+	(CHOOSE_DYNAMIC_LINKER, LINK_TARGET_SPEC, LINK_OS_LINUX_SPEC): Update.
+
+	* config/rs6000/sysv4le.h (MUSL_DYNAMIC_LINKER_E): Define.
+
 --- a/gcc/config/rs6000/linux64.h
 +++ b/gcc/config/rs6000/linux64.h
 @@ -365,17 +365,21 @@ extern int dot_symbols;
  #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%{msoft-float:-sf}.so.1"
-+#define MUSL_DYNAMIC_LINKER64 "/lib/ld-musl-powerpc64.so.1"
++#define MUSL_DYNAMIC_LINKER32 "/lib/ld-musl-powerpc" MUSL_DYNAMIC_LINKER_E ".so.1"
++#define MUSL_DYNAMIC_LINKER64 "/lib/ld-musl-powerpc64" MUSL_DYNAMIC_LINKER_E ".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 "}}"
@@ -68,11 +79,15 @@
  
  /* Any specific OS flags.  */
  #define LINK_OS_SPEC "\
-@@ -764,15 +768,18 @@ ENDIAN_SELECT(" -mbig", " -mlittle", DEF
+@@ -762,17 +766,22 @@ ENDIAN_SELECT(" -mbig", " -mlittle", DEF
  
+ #define LINK_START_LINUX_SPEC ""
+ 
++#define MUSL_DYNAMIC_LINKER_E ENDIAN_SELECT("","le","")
++
  #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%{msoft-float:-sf}.so.1"
++#define MUSL_DYNAMIC_LINKER "/lib/ld-musl-powerpc" MUSL_DYNAMIC_LINKER_E ".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 "}}"
@@ -90,7 +105,7 @@
  
  #define LINK_OS_LINUX_SPEC "-m elf32ppclinux %{!shared: %{!static: \
    %{rdynamic:-export-dynamic} \
-@@ -895,6 +902,7 @@ ncrtn.o%s"
+@@ -895,6 +904,7 @@ ncrtn.o%s"
    { "link_os_openbsd",		LINK_OS_OPENBSD_SPEC },			\
    { "link_os_default",		LINK_OS_DEFAULT_SPEC },			\
    { "cc1_secure_plt_default",	CC1_SECURE_PLT_DEFAULT_SPEC },		\
@@ -98,3 +113,84 @@
    { "cpp_os_ads",		CPP_OS_ADS_SPEC },			\
    { "cpp_os_yellowknife",	CPP_OS_YELLOWKNIFE_SPEC },		\
    { "cpp_os_mvme",		CPP_OS_MVME_SPEC },			\
+@@ -949,3 +959,72 @@ ncrtn.o%s"
+ /* This target uses the sysv4.opt file.  */
+ #define TARGET_USES_SYSV4_OPT 1
+ 
++/* Include order changes for musl, same as in generic linux.h.  */
++#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
+--- a/gcc/config/rs6000/sysv4le.h
++++ b/gcc/config/rs6000/sysv4le.h
+@@ -35,3 +35,5 @@
+ /* Little-endian PowerPC64 Linux uses the ELF v2 ABI by default.  */
+ #define LINUX64_DEFAULT_ABI_ELFv2
+ 
++#undef MUSL_DYNAMIC_LINKER_E
++#define MUSL_DYNAMIC_LINKER_E ENDIAN_SELECT("","le","le")
diff --git a/toolchain/gcc/patches/5.2.0/204-musl_sh.patch b/toolchain/gcc/patches/5.2.0/204-musl_sh.patch
index dfb5b51746..8c3753d530 100644
--- a/toolchain/gcc/patches/5.2.0/204-musl_sh.patch
+++ b/toolchain/gcc/patches/5.2.0/204-musl_sh.patch
@@ -1,17 +1,39 @@
+gcc/Changelog:
+
+2015-04-27  Gregor Richards  <gregor.richards@uwaterloo.ca>
+	    Szabolcs Nagy  <szabolcs.nagy@arm.com>
+
+	* config/sh/linux.h (MUSL_DYNAMIC_LINKER): Define.
+	(MUSL_DYNAMIC_LINKER_E, MUSL_DYNAMIC_LINKER_FP): Define.
+
 --- a/gcc/config/sh/linux.h
 +++ b/gcc/config/sh/linux.h
-@@ -43,7 +43,14 @@ along with GCC; see the file COPYING3.
+@@ -43,6 +43,28 @@ along with GCC; see the file COPYING3.
  
  #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
  
-+#if TARGET_BIG_ENDIAN_DEFAULT /* BE */
-+#define MUSL_DYNAMIC_LINKER_E "eb"
++#if TARGET_ENDIAN_DEFAULT == MASK_LITTLE_ENDIAN
++#define MUSL_DYNAMIC_LINKER_E "%{mb:eb}"
 +#else
-+#define MUSL_DYNAMIC_LINKER_E
++#define MUSL_DYNAMIC_LINKER_E "%{!ml:eb}"
 +#endif
 +
++#if TARGET_CPU_DEFAULT & ( MASK_HARD_SH2A_DOUBLE | MASK_SH4 )
++/* "-nofpu" if any nofpu option is specified */
++#define MUSL_DYNAMIC_LINKER_FP \
++  "%{m1|m2|m2a-nofpu|m3|m4-nofpu|m4-100-nofpu|m4-200-nofpu|m4-300-nofpu|" \
++  "m4-340|m4-400|m4-500|m4al|m5-32media-nofpu|m5-64media-nofpu|" \
++  "m5-compact-nofpu:-nofpu}"
++#else
++/* "-nofpu" if none of the hard fpu options are specified */
++#define MUSL_DYNAMIC_LINKER_FP \
++  "%{m2a|m4|m4-100|m4-200|m4-300|m4a|m5-32media|m5-64media|m5-compact:;:-nofpu}"
++#endif
++
++#undef MUSL_DYNAMIC_LINKER
++#define MUSL_DYNAMIC_LINKER \
++  "/lib/ld-musl-sh" MUSL_DYNAMIC_LINKER_E MUSL_DYNAMIC_LINKER_FP ".so.1"
++
  #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 --git a/toolchain/gcc/patches/5.2.0/205-musl_x86.patch b/toolchain/gcc/patches/5.2.0/205-musl_x86.patch
index a18bdccb10..8772328d64 100644
--- a/toolchain/gcc/patches/5.2.0/205-musl_x86.patch
+++ b/toolchain/gcc/patches/5.2.0/205-musl_x86.patch
@@ -1,7 +1,9 @@
-From 606b5b76926d42d26c08c7400c38afe07e18e3cd Mon Sep 17 00:00:00 2001
 From: ktkachov <ktkachov@138bc75d-0d04-0410-961f-82ee72b054a4>
-Date: Fri, 15 May 2015 13:20:01 +0000
-Subject: [PATCH 10/12] [PATCH 9/13] x86 musl support
+Date: Fri, 15 May 2015 13:20:01 +0000 (+0000)
+Subject: [PATCH 9/13] x86 musl support
+X-Git-Url: https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff_plain;h=5551c8d927c17f60837f15f8dfe46f945ba3fa9c
+
+[PATCH 9/13] x86 musl support
 
 On behalf of Szabolcs Nagy.
 
@@ -11,11 +13,9 @@ On behalf of Szabolcs Nagy.
 	* config/i386/linux64.h (MUSL_DYNAMIC_LINKER32): Define.
 	(MUSL_DYNAMIC_LINKER64, MUSL_DYNAMIC_LINKERX32): Define.
 
+
 git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@223218 138bc75d-0d04-0410-961f-82ee72b054a4
 ---
- gcc/config/i386/linux.h   | 3 +++
- gcc/config/i386/linux64.h | 7 +++++++
- 2 files changed, 10 insertions(+)
 
 --- a/gcc/config/i386/linux.h
 +++ b/gcc/config/i386/linux.h
@@ -39,34 +39,3 @@ git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@223218 138bc75d-0d04-0410-961f-8
 +#define MUSL_DYNAMIC_LINKER64 "/lib/ld-musl-x86_64.so.1"
 +#undef MUSL_DYNAMIC_LINKERX32
 +#define MUSL_DYNAMIC_LINKERX32 "/lib/ld-musl-x32.so.1"
---- a/libitm/config/linux/x86/tls.h
-+++ b/libitm/config/linux/x86/tls.h
-@@ -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 @@ static inline void set_abi_disp(struct a
- 
- } // namespace GTM
- #endif /* >= GLIBC 2.10 */
-+#endif
- 
- #endif // LIBITM_X86_TLS_H
diff --git a/toolchain/gcc/patches/5.2.0/206-musl_aarch64.patch b/toolchain/gcc/patches/5.2.0/206-musl_aarch64.patch
index c62ff51f75..6925a026e7 100644
--- a/toolchain/gcc/patches/5.2.0/206-musl_aarch64.patch
+++ b/toolchain/gcc/patches/5.2.0/206-musl_aarch64.patch
@@ -1,7 +1,9 @@
-From 3640f7722df1c5e39d1d4980e3dd51fbda45912c Mon Sep 17 00:00:00 2001
 From: jgreenhalgh <jgreenhalgh@138bc75d-0d04-0410-961f-82ee72b054a4>
-Date: Wed, 27 May 2015 16:46:39 +0000
-Subject: [PATCH 12/12] [PATCH 3/13] aarch64 musl support
+Date: Wed, 27 May 2015 16:46:39 +0000 (+0000)
+Subject: [PATCH 3/13] aarch64 musl support
+X-Git-Url: https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff_plain;h=b3ff21cf0531be91bc3fb8200296a7633090ec78
+
+[PATCH 3/13] aarch64 musl support
 
 gcc/Changelog:
 
@@ -10,10 +12,10 @@ gcc/Changelog:
 
 	* config/aarch64/aarch64-linux.h (MUSL_DYNAMIC_LINKER): Define.
 
+
+
 git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@223766 138bc75d-0d04-0410-961f-82ee72b054a4
 ---
- gcc/config/aarch64/aarch64-linux.h | 3 +++
- 1 file changed, 3 insertions(+)
 
 --- a/gcc/config/aarch64/aarch64-linux.h
 +++ b/gcc/config/aarch64/aarch64-linux.h
diff --git a/toolchain/gcc/patches/5.2.0/207-musl_fixincludes.patch b/toolchain/gcc/patches/5.2.0/207-musl_fixincludes.patch
index e6fa47f7e6..0ff33d39d8 100644
--- a/toolchain/gcc/patches/5.2.0/207-musl_fixincludes.patch
+++ b/toolchain/gcc/patches/5.2.0/207-musl_fixincludes.patch
@@ -1,3 +1,21 @@
+From: ktkachov <ktkachov@138bc75d-0d04-0410-961f-82ee72b054a4>
+Date: Wed, 22 Apr 2015 14:18:16 +0000 (+0000)
+Subject: fixincludes update for musl support
+X-Git-Url: https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff_plain;h=2dc727de2e87c2756a514cbb43cea23c99deaa3d
+
+fixincludes update for musl support
+
+On behalf of Szabolcs.Nagy@arm.com
+
+2015-04-22  Gregor Richards  <gregor.richards@uwaterloo.ca>
+
+	* mkfixinc.sh: Add *-musl* with no fixes.
+
+
+
+git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@222327 138bc75d-0d04-0410-961f-82ee72b054a4
+---
+
 --- a/fixincludes/mkfixinc.sh
 +++ b/fixincludes/mkfixinc.sh
 @@ -19,7 +19,8 @@ case $machine in
diff --git a/toolchain/gcc/patches/5.2.0/208-musl_gomp.patch b/toolchain/gcc/patches/5.2.0/208-musl_gomp.patch
deleted file mode 100644
index b15403b66f..0000000000
--- a/toolchain/gcc/patches/5.2.0/208-musl_gomp.patch
+++ /dev/null
@@ -1,11 +0,0 @@
---- a/libgomp/config/posix/time.c
-+++ b/libgomp/config/posix/time.c
-@@ -29,6 +29,8 @@
-    The following implementation uses the most simple POSIX routines.
-    If present, POSIX 4 clocks should be used instead.  */
- 
-+#define _POSIX_C_SOURCE 199309L /* for clocks */
-+
- #include "libgomp.h"
- #include <unistd.h>
- #if TIME_WITH_SYS_TIME
diff --git a/toolchain/gcc/patches/5.2.0/209-musl_libstdc++.patch b/toolchain/gcc/patches/5.2.0/209-musl_libstdc++.patch
index 2c8f6365ee..861bc76dc7 100644
--- a/toolchain/gcc/patches/5.2.0/209-musl_libstdc++.patch
+++ b/toolchain/gcc/patches/5.2.0/209-musl_libstdc++.patch
@@ -1,26 +1,72 @@
+From: ktkachov <ktkachov@138bc75d-0d04-0410-961f-82ee72b054a4>
+Date: Wed, 22 Apr 2015 14:24:11 +0000 (+0000)
+Subject: libstdc++, libgfortran gthr workaround for musl
+X-Git-Url: https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff_plain;h=1e5f711c11cb80ce609db9e9c1d8b2da0f7b5b61
+
+libstdc++, libgfortran gthr workaround for musl
+
+On behalf of szabolcs.nagy@arm.com
+
+[libstdc++-v3/]
+2015-04-22  Szabolcs Nagy  <szabolcs.nagy@arm.com>
+
+	* config/os/generic/os_defines.h (_GLIBCXX_GTHREAD_USE_WEAK): Define.
+	* configure.host (os_include_dir): Set to "os/generic" for linux-musl*.
+
+[libgfortran/]
+2015-04-22  Szabolcs Nagy  <szabolcs.nagy@arm.com>
+
+	* acinclude.m4 (GTHREAD_USE_WEAK): Define as 0 for *-*-musl*.
+	* configure: Regenerate.
+
+
+
+git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@222329 138bc75d-0d04-0410-961f-82ee72b054a4
+---
+
+--- a/libgfortran/acinclude.m4
++++ b/libgfortran/acinclude.m4
+@@ -100,7 +100,7 @@ void foo (void);
+ 	      [Define to 1 if the target supports #pragma weak])
+   fi
+   case "$host" in
+-    *-*-darwin* | *-*-hpux* | *-*-cygwin* | *-*-mingw* )
++    *-*-darwin* | *-*-hpux* | *-*-cygwin* | *-*-mingw* | *-*-musl* )
+       AC_DEFINE(GTHREAD_USE_WEAK, 0,
+ 		[Define to 0 if the target shouldn't use #pragma weak])
+       ;;
+--- a/libgfortran/configure
++++ b/libgfortran/configure
+@@ -26447,7 +26447,7 @@ $as_echo "#define SUPPORTS_WEAK 1" >>con
+ 
+   fi
+   case "$host" in
+-    *-*-darwin* | *-*-hpux* | *-*-cygwin* | *-*-mingw* )
++    *-*-darwin* | *-*-hpux* | *-*-cygwin* | *-*-mingw* | *-*-musl* )
+ 
+ $as_echo "#define GTHREAD_USE_WEAK 0" >>confdefs.h
+ 
+--- a/libstdc++-v3/config/os/generic/os_defines.h
++++ b/libstdc++-v3/config/os/generic/os_defines.h
+@@ -33,4 +33,9 @@
+ // System-specific #define, typedefs, corrections, etc, go here.  This
+ // file will come before all others.
+ 
++// Disable the weak reference logic in gthr.h for os/generic because it
++// is broken on every platform unless there is implementation specific
++// workaround in gthr-posix.h and at link-time for static linking.
++#define _GLIBCXX_GTHREAD_USE_WEAK 0
++
+ #endif
 --- a/libstdc++-v3/configure.host
 +++ b/libstdc++-v3/configure.host
-@@ -274,6 +274,13 @@ case "${host_os}" in
+@@ -273,6 +273,9 @@ case "${host_os}" in
+   freebsd*)
      os_include_dir="os/bsd/freebsd"
      ;;
++  linux-musl*)
++    os_include_dir="os/generic"
++    ;;
    gnu* | linux* | kfreebsd*-gnu | knetbsd*-gnu)
-+    # check for musl by target
-+    case "${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 @@ case "${host_os}" in
-       os_include_dir="os/gnu-linux"
-     fi
-     ;;
-+
-+    esac
-+    ;;
-   hpux*)
-     os_include_dir="os/hpux"
-     ;;
diff --git a/toolchain/gcc/patches/5.2.0/240-musl-libitm-fixes.patch b/toolchain/gcc/patches/5.2.0/240-musl-libitm-fixes.patch
new file mode 100644
index 0000000000..533cb68499
--- /dev/null
+++ b/toolchain/gcc/patches/5.2.0/240-musl-libitm-fixes.patch
@@ -0,0 +1,61 @@
+From: ktkachov <ktkachov@138bc75d-0d04-0410-961f-82ee72b054a4>
+Date: Wed, 22 Apr 2015 14:11:25 +0000 (+0000)
+Subject: libitm fixes for musl support
+X-Git-Url: https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff_plain;h=e53a4d49c3d03ab8eaddb073cf972c1c46d75338
+
+libitm fixes for musl support
+
+On behalf of Szabolcs.Nagy@arm.com
+
+2015-04-22  Gregor Richards  <gregor.richards@uwaterloo.ca>
+
+       * config/arm/hwcap.cc: Use fcntl.h instead of sys/fcntl.h.
+       * config/linux/x86/tls.h: Only use __GLIBC_PREREQ if defined.
+
+
+
+git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@222325 138bc75d-0d04-0410-961f-82ee72b054a4
+---
+
+--- a/libitm/config/arm/hwcap.cc
++++ b/libitm/config/arm/hwcap.cc
+@@ -40,7 +40,7 @@ int GTM_hwcap HIDDEN = 0
+ 
+ #ifdef __linux__
+ #include <unistd.h>
+-#include <sys/fcntl.h>
++#include <fcntl.h>
+ #include <elf.h>
+ 
+ static void __attribute__((constructor))
+--- a/libitm/config/linux/x86/tls.h
++++ b/libitm/config/linux/x86/tls.h
+@@ -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 @@ static inline void set_abi_disp(struct a
+ 
+ } // namespace GTM
+ #endif /* >= GLIBC 2.10 */
++#endif
+ 
+ #endif // LIBITM_X86_TLS_H
diff --git a/toolchain/gcc/patches/5.2.0/250-add-musl.patch b/toolchain/gcc/patches/5.2.0/250-add-musl.patch
new file mode 100644
index 0000000000..8cbeddea33
--- /dev/null
+++ b/toolchain/gcc/patches/5.2.0/250-add-musl.patch
@@ -0,0 +1,120 @@
+From: ktkachov <ktkachov@138bc75d-0d04-0410-961f-82ee72b054a4>
+Date: Fri, 8 May 2015 08:30:40 +0000 (+0000)
+Subject: [PATCH 0/13] Add musl support to GCC
+X-Git-Url: https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff_plain;h=f2d678afa5b8385d763b93772d73d6bf80a9739e
+
+[PATCH 0/13] Add musl support to GCC
+
+2015-05-08  Szabolcs Nagy  <szabolcs.nagy@arm.com>
+
+	* config/glibc-stdint.h (OPTION_MUSL): Define.
+	(INT_FAST16_TYPE, INT_FAST32_TYPE, UINT_FAST16_TYPE, UINT_FAST32_TYPE):
+	Change the definition based on OPTION_MUSL for 64 bit targets.
+	* config/linux.h (OPTION_MUSL): Redefine.
+	* config/alpha/linux.h (OPTION_MUSL): Redefine.
+	* config/rs6000/linux.h (OPTION_MUSL): Redefine.
+	* config/rs6000/linux64.h (OPTION_MUSL): Redefine.
+
+
+git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@222905 138bc75d-0d04-0410-961f-82ee72b054a4
+---
+
+--- a/gcc/config/alpha/linux.h
++++ b/gcc/config/alpha/linux.h
+@@ -61,10 +61,14 @@ along with GCC; see the file COPYING3.
+ #define OPTION_GLIBC  (DEFAULT_LIBC == LIBC_GLIBC)
+ #define OPTION_UCLIBC (DEFAULT_LIBC == LIBC_UCLIBC)
+ #define OPTION_BIONIC (DEFAULT_LIBC == LIBC_BIONIC)
++#undef OPTION_MUSL
++#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)
++#undef OPTION_MUSL
++#define OPTION_MUSL   (linux_libc == LIBC_MUSL)
+ #endif
+ 
+ /* Determine what functions are present at the runtime;
+--- a/gcc/config/glibc-stdint.h
++++ b/gcc/config/glibc-stdint.h
+@@ -22,6 +22,12 @@ a copy of the GCC Runtime Library Except
+ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+ <http://www.gnu.org/licenses/>.  */
+ 
++/* Systems using musl libc should use this header and make sure
++   OPTION_MUSL is defined correctly before using the TYPE macros. */
++#ifndef OPTION_MUSL
++#define OPTION_MUSL 0
++#endif
++
+ #define SIG_ATOMIC_TYPE "int"
+ 
+ #define INT8_TYPE "signed char"
+@@ -43,12 +49,12 @@ see the files COPYING3 and COPYING.RUNTI
+ #define UINT_LEAST64_TYPE (LONG_TYPE_SIZE == 64 ? "long unsigned int" : "long long unsigned int")
+ 
+ #define INT_FAST8_TYPE "signed char"
+-#define INT_FAST16_TYPE (LONG_TYPE_SIZE == 64 ? "long int" : "int")
+-#define INT_FAST32_TYPE (LONG_TYPE_SIZE == 64 ? "long int" : "int")
++#define INT_FAST16_TYPE (LONG_TYPE_SIZE == 64 && !OPTION_MUSL ? "long int" : "int")
++#define INT_FAST32_TYPE (LONG_TYPE_SIZE == 64 && !OPTION_MUSL ? "long int" : "int")
+ #define INT_FAST64_TYPE (LONG_TYPE_SIZE == 64 ? "long int" : "long long int")
+ #define UINT_FAST8_TYPE "unsigned char"
+-#define UINT_FAST16_TYPE (LONG_TYPE_SIZE == 64 ? "long unsigned int" : "unsigned int")
+-#define UINT_FAST32_TYPE (LONG_TYPE_SIZE == 64 ? "long unsigned int" : "unsigned int")
++#define UINT_FAST16_TYPE (LONG_TYPE_SIZE == 64 && !OPTION_MUSL ? "long unsigned int" : "unsigned int")
++#define UINT_FAST32_TYPE (LONG_TYPE_SIZE == 64 && !OPTION_MUSL ? "long unsigned int" : "unsigned int")
+ #define UINT_FAST64_TYPE (LONG_TYPE_SIZE == 64 ? "long unsigned int" : "long long unsigned int")
+ 
+ #define INTPTR_TYPE (LONG_TYPE_SIZE == 64 ? "long int" : "int")
+--- a/gcc/config/linux.h
++++ b/gcc/config/linux.h
+@@ -32,11 +32,13 @@ see the files COPYING3 and COPYING.RUNTI
+ #define OPTION_GLIBC  (DEFAULT_LIBC == LIBC_GLIBC)
+ #define OPTION_UCLIBC (DEFAULT_LIBC == LIBC_UCLIBC)
+ #define OPTION_BIONIC (DEFAULT_LIBC == LIBC_BIONIC)
++#undef OPTION_MUSL
+ #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)
++#undef OPTION_MUSL
+ #define OPTION_MUSL   (linux_libc == LIBC_MUSL)
+ #endif
+ 
+--- a/gcc/config/rs6000/linux.h
++++ b/gcc/config/rs6000/linux.h
+@@ -30,10 +30,14 @@
+ #define OPTION_GLIBC  (DEFAULT_LIBC == LIBC_GLIBC)
+ #define OPTION_UCLIBC (DEFAULT_LIBC == LIBC_UCLIBC)
+ #define OPTION_BIONIC (DEFAULT_LIBC == LIBC_BIONIC)
++#undef OPTION_MUSL
++#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)
++#undef OPTION_MUSL
++#define OPTION_MUSL   (linux_libc == LIBC_MUSL)
+ #endif
+ 
+ /* Determine what functions are present at the runtime;
+--- a/gcc/config/rs6000/linux64.h
++++ b/gcc/config/rs6000/linux64.h
+@@ -299,10 +299,14 @@ extern int dot_symbols;
+ #define OPTION_GLIBC  (DEFAULT_LIBC == LIBC_GLIBC)
+ #define OPTION_UCLIBC (DEFAULT_LIBC == LIBC_UCLIBC)
+ #define OPTION_BIONIC (DEFAULT_LIBC == LIBC_BIONIC)
++#undef OPTION_MUSL
++#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)
++#undef OPTION_MUSL
++#define OPTION_MUSL   (linux_libc == LIBC_MUSL)
+ #endif
+ 
+ /* Determine what functions are present at the runtime;
diff --git a/toolchain/gcc/patches/5.2.0/260-musl-add-unwind-fix.patch b/toolchain/gcc/patches/5.2.0/260-musl-add-unwind-fix.patch
new file mode 100644
index 0000000000..a3b83e2074
--- /dev/null
+++ b/toolchain/gcc/patches/5.2.0/260-musl-add-unwind-fix.patch
@@ -0,0 +1,34 @@
+From: ktkachov <ktkachov@138bc75d-0d04-0410-961f-82ee72b054a4>
+Date: Wed, 22 Apr 2015 14:20:01 +0000 (+0000)
+Subject: unwind fix for musl
+X-Git-Url: https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff_plain;h=a2e31d0681d8a47389b8a3552622fbd9827bcef4
+
+unwind fix for musl
+
+On behalf of szabolcs.nagy@arm.com
+
+2015-04-22  Gregor Richards  <gregor.richards@uwaterloo.ca>
+	    Szabolcs Nagy  <szabolcs.nagy@arm.com>
+
+	* unwind-dw2-fde-dip.c (USE_PT_GNU_EH_FRAME): Define it on
+	Linux if target provides dl_iterate_phdr.
+
+
+git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@222328 138bc75d-0d04-0410-961f-82ee72b054a4
+---
+
+--- a/libgcc/unwind-dw2-fde-dip.c
++++ b/libgcc/unwind-dw2-fde-dip.c
+@@ -59,6 +59,12 @@
+ 
+ #if !defined(inhibit_libc) && defined(HAVE_LD_EH_FRAME_HDR) \
+     && defined(TARGET_DL_ITERATE_PHDR) \
++    && defined(__linux__)
++# define USE_PT_GNU_EH_FRAME
++#endif
++
++#if !defined(inhibit_libc) && defined(HAVE_LD_EH_FRAME_HDR) \
++    && defined(TARGET_DL_ITERATE_PHDR) \
+     && (defined(__DragonFly__) || defined(__FreeBSD__))
+ # define ElfW __ElfN
+ # define USE_PT_GNU_EH_FRAME
diff --git a/toolchain/gcc/patches/5.2.0/850-use_shared_libgcc.patch b/toolchain/gcc/patches/5.2.0/850-use_shared_libgcc.patch
index d7ba9627aa..5818cf4da0 100644
--- a/toolchain/gcc/patches/5.2.0/850-use_shared_libgcc.patch
+++ b/toolchain/gcc/patches/5.2.0/850-use_shared_libgcc.patch
@@ -13,7 +13,7 @@
     is used.  */
 --- a/gcc/config/linux.h
 +++ b/gcc/config/linux.h
-@@ -51,6 +51,10 @@ see the files COPYING3 and COPYING.RUNTI
+@@ -53,6 +53,10 @@ see the files COPYING3 and COPYING.RUNTI
  	builtin_assert ("system=posix");			\
      } while (0)
  
@@ -22,8 +22,8 @@
 +#endif
 +
  /* Determine which dynamic linker to use depending on whether GLIBC or
-    uClibc or Bionic is the default C library and whether
-    -muclibc or -mglibc or -mbionic has been passed to change the default.  */
+    uClibc or Bionic or musl is the default C library and whether
+    -muclibc or -mglibc or -mbionic or -mmusl has been passed to change
 --- a/libgcc/mkmap-symver.awk
 +++ b/libgcc/mkmap-symver.awk
 @@ -132,5 +132,5 @@ function output(lib) {
@@ -35,7 +35,7 @@
  }
 --- a/gcc/config/rs6000/linux.h
 +++ b/gcc/config/rs6000/linux.h
-@@ -56,6 +56,9 @@
+@@ -60,6 +60,9 @@
  #undef	CPP_OS_DEFAULT_SPEC
  #define CPP_OS_DEFAULT_SPEC "%(cpp_os_linux)"
  
diff --git a/toolchain/gcc/patches/5.2.0/860-use_eh_frame.patch b/toolchain/gcc/patches/5.2.0/860-use_eh_frame.patch
deleted file mode 100644
index 4586349537..0000000000
--- a/toolchain/gcc/patches/5.2.0/860-use_eh_frame.patch
+++ /dev/null
@@ -1,43 +0,0 @@
---- a/libgcc/unwind-dw2-fde-dip.c
-+++ b/libgcc/unwind-dw2-fde-dip.c
-@@ -46,34 +46,13 @@
- #include "unwind-compat.h"
- #include "gthr.h"
- 
--#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)))
--# define USE_PT_GNU_EH_FRAME
--#endif
--
--#if !defined(inhibit_libc) && defined(HAVE_LD_EH_FRAME_HDR) \
--    && defined(__BIONIC__)
--# define USE_PT_GNU_EH_FRAME
--#endif
--
--#if !defined(inhibit_libc) && defined(HAVE_LD_EH_FRAME_HDR) \
--    && defined(TARGET_DL_ITERATE_PHDR) \
--    && (defined(__DragonFly__) || defined(__FreeBSD__))
--# define ElfW __ElfN
--# define USE_PT_GNU_EH_FRAME
--#endif
--
--#if !defined(inhibit_libc) && defined(HAVE_LD_EH_FRAME_HDR) \
--    && defined(__OpenBSD__)
--# define ElfW(type) Elf_##type
--# define USE_PT_GNU_EH_FRAME
--#endif
--
--#if !defined(inhibit_libc) && defined(HAVE_LD_EH_FRAME_HDR) \
--    && defined(TARGET_DL_ITERATE_PHDR) \
--    && defined(__sun__) && defined(__svr4__)
-+#if !defined(inhibit_libc) && defined(HAVE_LD_EH_FRAME_HDR)
- # define USE_PT_GNU_EH_FRAME
-+# ifdef __OpenBSD__
-+#  define ElfW(type) Elf_##type
-+# elif defined(__FreeBSD__) && __FreeBSD__ >= 7
-+#  define ElfW __ElfN
-+# endif
- #endif
- 
- #if defined(USE_PT_GNU_EH_FRAME)