add the ability to build uClibc-ng toolchain for microblaze (only static binaries are working for now)

target/config/Config.in.cpu

@@ -470,8 +470,10 @@ config ADK_CPU_MIPS64R2
 
 config ADK_CPU_MICROBLAZE
 	bool
+	select ADK_TARGET_WITHOUT_THREADS if ADK_TARGET_LIB_UCLIBC_NG
+	select ADK_TARGET_WITHOUT_CXX if ADK_TARGET_LIB_UCLIBC_NG
 	select ADK_TARGET_WITH_MMU if !ADK_LINUX_UCLINUX
-	select ADK_TARGET_WITH_NPTL if ADK_TARGET_LIBC_GLIBC || ADK_TARGET_LIBC_MUSL
+	select ADK_TARGET_WITH_NPTL if ADK_TARGET_LIB_GLIBC || ADK_TARGET_LIB_MUSL
 
 config ADK_CPU_NIOS2
 	bool

target/microblaze/uclibc-ng.config

@@ -22,7 +22,6 @@ TARGET_microblaze=y
 # TARGET_nios2 is not set
 # TARGET_powerpc is not set
 # TARGET_sh is not set
-# TARGET_sh64 is not set
 # TARGET_sparc is not set
 # TARGET_v850 is not set
 # TARGET_x86_64 is not set
@@ -43,9 +42,9 @@ ARCH_HAS_MMU=y
 ARCH_USE_MMU=y
 UCLIBC_HAS_FLOATS=y
 UCLIBC_HAS_FPU=y
-# DO_C99_MATH is not set
+DO_C99_MATH=y
 # DO_XSI_MATH is not set
-# UCLIBC_HAS_FENV is not set
+UCLIBC_HAS_FENV=y
 KERNEL_HEADERS=""
 HAVE_DOT_CONFIG=y
 
@@ -75,11 +74,11 @@ HAS_NO_THREADS=y
 # UCLIBC_HAS_LINUXTHREADS is not set
 UCLIBC_HAS_SYSLOG=y
 UCLIBC_HAS_LFS=y
-MALLOC=y
-MALLOC_GLIBC_COMPAT=y
 UCLIBC_HAS_OBSTACK=y
 UCLIBC_DYNAMIC_ATEXIT=y
 # COMPAT_ATEXIT is not set
+UCLIBC_HAS_UTMPX=y
+UCLIBC_HAS_UTMP=y
 UCLIBC_SUSV2_LEGACY=y
 UCLIBC_SUSV3_LEGACY=y
 # UCLIBC_SUSV3_LEGACY_MACROS is not set
@@ -159,7 +158,6 @@ UCLIBC_HAS_WCHAR=y
 # UCLIBC_HAS_HEXADECIMAL_FLOATS is not set
 # UCLIBC_HAS_GLIBC_CUSTOM_PRINTF is not set
 UCLIBC_PRINTF_SCANF_POSITIONAL_ARGS=9
-# UCLIBC_HAS_STDIO_BUFSIZ_NONE is not set
 # UCLIBC_HAS_STDIO_BUFSIZ_256 is not set
 # UCLIBC_HAS_STDIO_BUFSIZ_512 is not set
 # UCLIBC_HAS_STDIO_BUFSIZ_1024 is not set
@@ -197,8 +195,6 @@ UCLIBC_HAS_FTW=y
 UCLIBC_HAS_FTS=y
 UCLIBC_HAS_GLOB=y
 UCLIBC_HAS_GNU_GLOB=y
-UCLIBC_HAS_UTMP=y
-UCLIBC_HAS_UTMPX=y
 
 #
 # Library Installation Options

toolchain/gcc/patches/4.9.2/microblaze-uclibc.patch

@@ -0,0 +1,29 @@
+diff -Nur gcc-4.9.2.orig/gcc/config/microblaze/linux.h gcc-4.9.2/gcc/config/microblaze/linux.h
+--- gcc-4.9.2.orig/gcc/config/microblaze/linux.h	2014-01-02 16:23:26.000000000 -0600
++++ gcc-4.9.2/gcc/config/microblaze/linux.h	2015-06-07 09:32:24.621501374 -0500
+@@ -25,10 +25,23 @@
+ #undef TLS_NEEDS_GOT
+ #define TLS_NEEDS_GOT 1
+ 
+-#define DYNAMIC_LINKER "/lib/ld.so.1"
++#define GLIBC_DYNAMIC_LINKER	"/lib/ld-linux.so.2"
++#define UCLIBC_DYNAMIC_LINKER "/lib/ld-uClibc.so.0"
++#if DEFAULT_LIBC == LIBC_UCLIBC
++#define CHOOSE_DYNAMIC_LINKER(G, U) "%{mglibc:" G ";:" U "}"
++#elif DEFAULT_LIBC == LIBC_GLIBC
++#define CHOOSE_DYNAMIC_LINKER(G, U) "%{muclibc:" U ";:" G "}"
++#else
++#error "Unsupported DEFAULT_LIBC"
++#endif
++#define GNU_USER_DYNAMIC_LINKER \
++  CHOOSE_DYNAMIC_LINKER (GLIBC_DYNAMIC_LINKER, UCLIBC_DYNAMIC_LINKER)
++
++#define ELF_DYNAMIC_LINKER	GNU_USER_DYNAMIC_LINKER
++
+ #undef  SUBTARGET_EXTRA_SPECS
+ #define SUBTARGET_EXTRA_SPECS \
+-  { "dynamic_linker", DYNAMIC_LINKER }
++  { "dynamic_linker", ELF_DYNAMIC_LINKER }
+ 
+ #undef LINK_SPEC
+ #define LINK_SPEC "%{shared:-shared} \