Revert "remove config knobs that belong to the nptl branch"

This reverts commit de82658a05de0ace6f3d261dedc358d3a14f3681.

Signed-off-by: Austin Foxley <austinf@cetoncorp.com>

extra/Configs/Config.in

@@ -401,6 +401,7 @@ config LDSO_GNU_HASH_SUPPORT
 
 choice
 	prompt "Thread support"
+	#default UCLIBC_HAS_THREADS_NATIVE if (TARGET_alpha || TARGET_arm || TARGET_i386 || TARGET_mips || TARGET_powerpc || TARGET_sh || TARGET_sh64)
 	default HAS_NO_THREADS
 	help
 	  If you want to compile uClibc with pthread support, then answer Y.
@@ -431,11 +432,41 @@ config LINUXTHREADS_NEW
 	  the latest code from glibc, so it may be the only choice for the
 	  newer ports (like alpha/amd64/64bit arches and hppa).
 
+config UCLIBC_HAS_THREADS_NATIVE
+	bool "Native POSIX Threading (NPTL)"
+	select UCLIBC_HAS_TLS
+	help
+	  If you want to compile uClibc with NPTL support, then answer Y.
+
+	  IMPORTANT NOTE!  NPTL requires a Linux 2.6 kernel, binutils
+	  at least version 2.16 and GCC with at least version 4.1.0. NPTL
+	  will not work with older versions of any above sources. If you
+	  ignore any of these guidelines, you do so at your own risk. Do
+	  not ask for help on any of the development mailing lists.
+
+	  !!!! WARNING !!!! BIG FAT WARNING !!!! REALLY BIG FAT WARNING !!!!
+
+	  This is experimental code and at times it may not even build and
+	  even if it does it might decide to do random damage. This code is
+	  potentially hazardous to your health and sanity. It will remain
+	  that way until further notice at which point this notice will
+	  disappear. Thank you for your support and for not smoking.
+
 endchoice
 
 config UCLIBC_HAS_THREADS
 	def_bool y if !HAS_NO_THREADS
 
+config UCLIBC_HAS_TLS
+	bool "Thread-Local Storage"
+	depends on UCLIBC_HAS_THREADS_NATIVE
+	default n
+	help
+	  If you want to enable TLS support then answer Y.
+	  This is fast an efficient way to store per-thread local data
+	  which is not on stack. It needs __thread support enabled in
+	  gcc.
+
 config PTHREADS_DEBUG_SUPPORT
 	bool "Build pthreads debugging support"
 	default n
@@ -1715,6 +1746,14 @@ config UCLIBC_HAS_GNU_GETOPT
 
 	  Most people will answer Y.
 
+config UCLIBC_HAS_STDIO_FUTEXES
+	bool "Use futexes for multithreaded I/O locking"
+	default n
+	depends on UCLIBC_HAS_THREADS_NATIVE
+	help
+	  If you want to compile uClibc to use futexes for low-level
+	  I/O locking, answer Y.  Otherwise, answer N.
+
 config UCLIBC_HAS_GETOPT_LONG
 	bool "Support getopt_long/getopt_long_only"
 	depends on !UCLIBC_HAS_GNU_GETOPT