import the plan 9 libraries libc (lib9) and libbio into the tree.
remove the dependency on /home/r.
SVN=122482
diff --git a/include/u.h b/include/u.h
new file mode 100644
index 0000000..9b7bccb
--- /dev/null
+++ b/include/u.h
@@ -0,0 +1,208 @@
+/*
+Plan 9 from User Space include/u.h
+http://code.swtch.com/plan9port/src/tip/include/u.h
+
+Copyright 2001-2007 Russ Cox. All Rights Reserved.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+
+#ifndef _U_H_
+#define _U_H_ 1
+#if defined(__cplusplus)
+extern "C" {
+#endif
+
+#define __BSD_VISIBLE 1 /* FreeBSD 5.x */
+#if defined(__sun__)
+# define __EXTENSIONS__ 1 /* SunOS */
+# if defined(__SunOS5_6__) || defined(__SunOS5_7__) || defined(__SunOS5_8__)
+ /* NOT USING #define __MAKECONTEXT_V2_SOURCE 1 / * SunOS */
+# else
+# define __MAKECONTEXT_V2_SOURCE 1
+# endif
+#endif
+#define _BSD_SOURCE 1
+#define _NETBSD_SOURCE 1 /* NetBSD */
+#define _SVID_SOURCE 1
+#if !defined(__APPLE__) && !defined(__OpenBSD__)
+# define _XOPEN_SOURCE 1000
+# define _XOPEN_SOURCE_EXTENDED 1
+#endif
+#if defined(__FreeBSD__)
+# include <sys/cdefs.h>
+ /* for strtoll */
+# undef __ISO_C_VISIBLE
+# define __ISO_C_VISIBLE 1999
+# undef __LONG_LONG_SUPPORTED
+# define __LONG_LONG_SUPPORTED
+#endif
+#define _LARGEFILE64_SOURCE 1
+#define _FILE_OFFSET_BITS 64
+
+#include <inttypes.h>
+
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <fcntl.h>
+#include <assert.h>
+#include <setjmp.h>
+#include <stddef.h>
+#include <math.h>
+#include <ctype.h> /* for tolower */
+
+/*
+ * OS-specific crap
+ */
+#define _NEEDUCHAR 1
+#define _NEEDUSHORT 1
+#define _NEEDUINT 1
+#define _NEEDULONG 1
+
+typedef long p9jmp_buf[sizeof(sigjmp_buf)/sizeof(long)];
+
+#if defined(__linux__)
+# include <sys/types.h>
+# if defined(__Linux26__)
+# include <pthread.h>
+# define PLAN9PORT_USING_PTHREADS 1
+# endif
+# if defined(__USE_MISC)
+# undef _NEEDUSHORT
+# undef _NEEDUINT
+# undef _NEEDULONG
+# endif
+#elif defined(__sun__)
+# include <sys/types.h>
+# include <pthread.h>
+# define PLAN9PORT_USING_PTHREADS 1
+# undef _NEEDUSHORT
+# undef _NEEDUINT
+# undef _NEEDULONG
+# define nil 0 /* no cast to void* */
+#elif defined(__FreeBSD__)
+# include <sys/types.h>
+# include <osreldate.h>
+# if __FreeBSD_version >= 500000
+# define PLAN9PORT_USING_PTHREADS 1
+# include <pthread.h>
+# endif
+# if !defined(_POSIX_SOURCE)
+# undef _NEEDUSHORT
+# undef _NEEDUINT
+# endif
+#elif defined(__APPLE__)
+# include <sys/types.h>
+# include <pthread.h>
+# define PLAN9PORT_USING_PTHREADS 1
+# if __GNUC__ < 4
+# undef _NEEDUSHORT
+# undef _NEEDUINT
+# endif
+# undef _ANSI_SOURCE
+# undef _POSIX_C_SOURCE
+# undef _XOPEN_SOURCE
+# if !defined(NSIG)
+# define NSIG 32
+# endif
+# define _NEEDLL 1
+#elif defined(__NetBSD__)
+# include <sched.h>
+# include <sys/types.h>
+# undef _NEEDUSHORT
+# undef _NEEDUINT
+# undef _NEEDULONG
+#elif defined(__OpenBSD__)
+# include <sys/types.h>
+# undef _NEEDUSHORT
+# undef _NEEDUINT
+# undef _NEEDULONG
+#else
+ /* No idea what system this is -- try some defaults */
+# include <pthread.h>
+# define PLAN9PORT_USING_PTHREADS 1
+#endif
+
+#ifndef O_DIRECT
+#define O_DIRECT 0
+#endif
+
+typedef signed char schar;
+
+#ifdef _NEEDUCHAR
+ typedef unsigned char uchar;
+#endif
+#ifdef _NEEDUSHORT
+ typedef unsigned short ushort;
+#endif
+#ifdef _NEEDUINT
+ typedef unsigned int uint;
+#endif
+#ifdef _NEEDULONG
+ typedef unsigned long ulong;
+#endif
+typedef unsigned long long uvlong;
+typedef long long vlong;
+
+typedef uint64_t u64int;
+typedef int64_t s64int;
+typedef uint8_t u8int;
+typedef int8_t s8int;
+typedef uint16_t u16int;
+typedef int16_t s16int;
+typedef uintptr_t uintptr;
+typedef intptr_t intptr;
+typedef uint32_t u32int;
+typedef int32_t s32int;
+
+#undef _NEEDUCHAR
+#undef _NEEDUSHORT
+#undef _NEEDUINT
+#undef _NEEDULONG
+
+/*
+ * Funny-named symbols to tip off 9l to autolink.
+ */
+#define AUTOLIB(x) static int __p9l_autolib_ ## x = 1;
+#define AUTOFRAMEWORK(x) static int __p9l_autoframework_ ## x = 1;
+
+/*
+ * Gcc is too smart for its own good.
+ */
+#if defined(__GNUC__)
+# undef strcmp /* causes way too many warnings */
+# if __GNUC__ >= 4 || (__GNUC__==3 && !defined(__APPLE_CC__))
+# undef AUTOLIB
+# define AUTOLIB(x) int __p9l_autolib_ ## x __attribute__ ((weak));
+# undef AUTOFRAMEWORK
+# define AUTOFRAMEWORK(x) int __p9l_autoframework_ ## x __attribute__ ((weak));
+# else
+# undef AUTOLIB
+# define AUTOLIB(x) static int __p9l_autolib_ ## x __attribute__ ((unused));
+# undef AUTOFRAMEWORK
+# define AUTOFRAMEWORK(x) static int __p9l_autoframework_ ## x __attribute__ ((unused));
+# endif
+#endif
+
+#if defined(__cplusplus)
+}
+#endif
+#endif
