diff --git a/libc/tzcode/private.h b/libc/tzcode/private.h
index 494e142..1c176e6 100644
--- a/libc/tzcode/private.h
+++ b/libc/tzcode/private.h
@@ -19,13 +19,9 @@
 
 /*
 ** Defaults for preprocessor symbols.
-** You can override these in your C compiler options, e.g. '-DHAVE_ADJTIME=0'.
+** You can override these in your C compiler options, e.g. '-DHAVE_GETTEXT=1'.
 */
 
-#ifndef HAVE_ADJTIME
-#define HAVE_ADJTIME		1
-#endif /* !defined HAVE_ADJTIME */
-
 #ifndef HAVE_GETTEXT
 #define HAVE_GETTEXT		0
 #endif /* !defined HAVE_GETTEXT */
@@ -38,9 +34,9 @@
 #define HAVE_LINK		1
 #endif /* !defined HAVE_LINK */
 
-#ifndef HAVE_SETTIMEOFDAY
-#define HAVE_SETTIMEOFDAY	3
-#endif /* !defined HAVE_SETTIMEOFDAY */
+#ifndef HAVE_STRDUP
+#define HAVE_STRDUP 1
+#endif
 
 #ifndef HAVE_SYMLINK
 #define HAVE_SYMLINK		1
@@ -59,32 +55,61 @@
 #endif /* !defined HAVE_UNISTD_H */
 
 #ifndef HAVE_UTMPX_H
-#define HAVE_UTMPX_H		0
+#define HAVE_UTMPX_H		1
 #endif /* !defined HAVE_UTMPX_H */
 
-#if !defined(__ANDROID__)
-#ifndef LOCALE_HOME
-#define LOCALE_HOME		"/usr/lib/locale"
-#endif /* !defined LOCALE_HOME */
-#endif // __ANDROID__
+#ifndef NETBSD_INSPIRED
+# define NETBSD_INSPIRED 1
+#endif
 
 #if HAVE_INCOMPATIBLE_CTIME_R
 #define asctime_r _incompatible_asctime_r
 #define ctime_r _incompatible_ctime_r
 #endif /* HAVE_INCOMPATIBLE_CTIME_R */
 
+/* Enable tm_gmtoff and tm_zone on GNUish systems.  */
+#define _GNU_SOURCE 1
+/* Fix asctime_r on Solaris 10.  */
+#define _POSIX_PTHREAD_SEMANTICS 1
+/* Enable strtoimax on Solaris 10.  */
+#define __EXTENSIONS__ 1
+
 /*
 ** Nested includes
 */
 
+/* Avoid clashes with NetBSD by renaming NetBSD's declarations.  */
+#define localtime_rz sys_localtime_rz
+#define mktime_z sys_mktime_z
+#define posix2time_z sys_posix2time_z
+#define time2posix_z sys_time2posix_z
+#define timezone_t sys_timezone_t
+#define tzalloc sys_tzalloc
+#define tzfree sys_tzfree
+#include <time.h>
+#undef localtime_rz
+#undef mktime_z
+#undef posix2time_z
+#undef time2posix_z
+#undef timezone_t
+#undef tzalloc
+#undef tzfree
+
 #include "sys/types.h"	/* for time_t */
 #include "stdio.h"
-#include "errno.h"
 #include "string.h"
 #include "limits.h"	/* for CHAR_BIT et al. */
-#include "time.h"
 #include "stdlib.h"
 
+#include "errno.h"
+
+#ifndef ENAMETOOLONG
+# define ENAMETOOLONG EINVAL
+#endif
+#ifndef EOVERFLOW
+# define EOVERFLOW EINVAL
+#endif
+
 #if HAVE_GETTEXT
 #include "libintl.h"
 #endif /* HAVE_GETTEXT */
@@ -104,6 +129,14 @@
 #include "unistd.h"	/* for F_OK, R_OK, and other POSIX goodness */
 #endif /* HAVE_UNISTD_H */
 
+#ifndef HAVE_STRFTIME_L
+# if _POSIX_VERSION < 200809
+#  define HAVE_STRFTIME_L 0
+# else
+#  define HAVE_STRFTIME_L 1
+# endif
+#endif
+
 #ifndef F_OK
 #define F_OK	0
 #endif /* !defined F_OK */
@@ -138,65 +171,98 @@
 # include <inttypes.h>
 #endif
 
-#ifndef INT_FAST64_MAX
 /* Pre-C99 GCC compilers define __LONG_LONG_MAX__ instead of LLONG_MAX.  */
-#if defined LLONG_MAX || defined __LONG_LONG_MAX__
-typedef long long	int_fast64_t;
+#ifdef __LONG_LONG_MAX__
+# ifndef LLONG_MAX
+#  define LLONG_MAX __LONG_LONG_MAX__
+# endif
+# ifndef LLONG_MIN
+#  define LLONG_MIN (-1 - LLONG_MAX)
+# endif
+#endif
+
+#ifndef INT_FAST64_MAX
 # ifdef LLONG_MAX
+typedef long long	int_fast64_t;
 #  define INT_FAST64_MIN LLONG_MIN
 #  define INT_FAST64_MAX LLONG_MAX
 # else
-#  define INT_FAST64_MIN __LONG_LONG_MIN__
-#  define INT_FAST64_MAX __LONG_LONG_MAX__
-# endif
-# define SCNdFAST64 "lld"
-#else /* ! (defined LLONG_MAX || defined __LONG_LONG_MAX__) */
-#if (LONG_MAX >> 31) < 0xffffffff
+#  if LONG_MAX >> 31 < 0xffffffff
 Please use a compiler that supports a 64-bit integer type (or wider);
 you may need to compile with "-DHAVE_STDINT_H".
-#endif /* (LONG_MAX >> 31) < 0xffffffff */
+#  endif
 typedef long		int_fast64_t;
-# define INT_FAST64_MIN LONG_MIN
-# define INT_FAST64_MAX LONG_MAX
-# define SCNdFAST64 "ld"
-#endif /* ! (defined LLONG_MAX || defined __LONG_LONG_MAX__) */
-#endif /* !defined INT_FAST64_MAX */
+#  define INT_FAST64_MIN LONG_MIN
+#  define INT_FAST64_MAX LONG_MAX
+# endif
+#endif
+
+#ifndef SCNdFAST64
+# if INT_FAST64_MAX == LLONG_MAX
+#  define SCNdFAST64 "lld"
+# else
+#  define SCNdFAST64 "ld"
+# endif
+#endif
 
 #ifndef INT_FAST32_MAX
 # if INT_MAX >> 31 == 0
 typedef long int_fast32_t;
+#  define INT_FAST32_MAX LONG_MAX
+#  define INT_FAST32_MIN LONG_MIN
 # else
 typedef int int_fast32_t;
+#  define INT_FAST32_MAX INT_MAX
+#  define INT_FAST32_MIN INT_MIN
 # endif
 #endif
 
 #ifndef INTMAX_MAX
-# if defined LLONG_MAX || defined __LONG_LONG_MAX__
+# ifdef LLONG_MAX
 typedef long long intmax_t;
 #  define strtoimax strtoll
-#  define PRIdMAX "lld"
-#  ifdef LLONG_MAX
-#   define INTMAX_MAX LLONG_MAX
-#   define INTMAX_MIN LLONG_MIN
-#  else
-#   define INTMAX_MAX __LONG_LONG_MAX__
-#   define INTMAX_MIN __LONG_LONG_MIN__
-#  endif
+#  define INTMAX_MAX LLONG_MAX
+#  define INTMAX_MIN LLONG_MIN
 # else
 typedef long intmax_t;
 #  define strtoimax strtol
-#  define PRIdMAX "ld"
 #  define INTMAX_MAX LONG_MAX
 #  define INTMAX_MIN LONG_MIN
 # endif
 #endif
 
+#ifndef PRIdMAX
+# if INTMAX_MAX == LLONG_MAX
+#  define PRIdMAX "lld"
+# else
+#  define PRIdMAX "ld"
+# endif
+#endif
+
+#ifndef UINT_FAST64_MAX
+# if defined ULLONG_MAX || defined __LONG_LONG_MAX__
+typedef unsigned long long uint_fast64_t;
+# else
+#  if ULONG_MAX >> 31 >> 1 < 0xffffffff
+Please use a compiler that supports a 64-bit integer type (or wider);
+you may need to compile with "-DHAVE_STDINT_H".
+#  endif
+typedef unsigned long	uint_fast64_t;
+# endif
+#endif
+
 #ifndef UINTMAX_MAX
 # if defined ULLONG_MAX || defined __LONG_LONG_MAX__
 typedef unsigned long long uintmax_t;
-#  define PRIuMAX "llu"
 # else
 typedef unsigned long uintmax_t;
+# endif
+#endif
+
+#ifndef PRIuMAX
+# if defined ULLONG_MAX || defined __LONG_LONG_MAX__
+#  define PRIuMAX "llu"
+# else
 #  define PRIuMAX "lu"
 # endif
 #endif
@@ -239,16 +305,6 @@
 */
 
 /*
-** Some time.h implementations don't declare asctime_r.
-** Others might define it as a macro.
-** Fix the former without affecting the latter.
-*/
-
-#ifndef asctime_r
-extern char *	asctime_r(struct tm const *, char *);
-#endif
-
-/*
 ** Compile with -Dtime_tz=T to build the tz package with a private
 ** time_t type equivalent to T rather than the system-supplied time_t.
 ** This debugging feature can test unusual design decisions
@@ -256,7 +312,11 @@
 ** typical platforms.
 */
 #ifdef time_tz
+# ifdef LOCALTIME_IMPLEMENTATION
 static time_t sys_time(time_t *x) { return time(x); }
+# endif
+
+typedef time_tz tz_time_t;
 
 # undef  ctime
 # define ctime tz_ctime
@@ -272,14 +332,40 @@
 # define localtime tz_localtime
 # undef  localtime_r
 # define localtime_r tz_localtime_r
+# undef  localtime_rz
+# define localtime_rz tz_localtime_rz
 # undef  mktime
 # define mktime tz_mktime
+# undef  mktime_z
+# define mktime_z tz_mktime_z
+# undef  offtime
+# define offtime tz_offtime
+# undef  posix2time
+# define posix2time tz_posix2time
+# undef  posix2time_z
+# define posix2time_z tz_posix2time_z
 # undef  time
 # define time tz_time
+# undef  time2posix
+# define time2posix tz_time2posix
+# undef  time2posix_z
+# define time2posix_z tz_time2posix_z
 # undef  time_t
 # define time_t tz_time_t
-
-typedef time_tz time_t;
+# undef  timegm
+# define timegm tz_timegm
+# undef  timelocal
+# define timelocal tz_timelocal
+# undef  timeoff
+# define timeoff tz_timeoff
+# undef  tzalloc
+# define tzalloc tz_tzalloc
+# undef  tzfree
+# define tzfree tz_tzfree
+# undef  tzset
+# define tzset tz_tzset
+# undef  tzsetwall
+# define tzsetwall tz_tzsetwall
 
 char *ctime(time_t const *);
 char *ctime_r(time_t const *, char *);
@@ -289,36 +375,111 @@
 struct tm *localtime(time_t const *);
 struct tm *localtime_r(time_t const *restrict, struct tm *restrict);
 time_t mktime(struct tm *);
-
-static time_t
-time(time_t *p)
-{
-	time_t r = sys_time(0);
-	if (p)
-		*p = r;
-	return r;
-}
+time_t time(time_t *);
+void tzset(void);
 #endif
 
 /*
-** Private function declarations.
+** Some time.h implementations don't declare asctime_r.
+** Others might define it as a macro.
+** Fix the former without affecting the latter.
+** Similarly for timezone, daylight, and altzone.
 */
 
-char *		icatalloc(char * old, const char * new);
-char *		icpyalloc(const char * string);
-const char *	scheck(const char * string, const char * format);
+#ifndef asctime_r
+extern char *	asctime_r(struct tm const *restrict, char *restrict);
+#endif
+
+#ifdef USG_COMPAT
+# ifndef timezone
+extern long timezone;
+# endif
+# ifndef daylight
+extern int daylight;
+# endif
+#endif
+#if defined ALTZONE && !defined altzone
+extern long altzone;
+#endif
+
+/*
+** The STD_INSPIRED functions are similar, but most also need
+** declarations if time_tz is defined.
+*/
+
+#ifdef STD_INSPIRED
+# if !defined tzsetwall || defined time_tz
+void tzsetwall(void);
+# endif
+# if !defined offtime || defined time_tz
+struct tm *offtime(time_t const *, long);
+# endif
+# if !defined timegm || defined time_tz
+time_t timegm(struct tm *);
+# endif
+# if !defined timelocal || defined time_tz
+time_t timelocal(struct tm *);
+# endif
+# if !defined timeoff || defined time_tz
+time_t timeoff(struct tm *, long);
+# endif
+# if !defined time2posix || defined time_tz
+time_t time2posix(time_t);
+# endif
+# if !defined posix2time || defined time_tz
+time_t posix2time(time_t);
+# endif
+#endif
+
+/* Infer TM_ZONE on systems where this information is known, but suppress
+   guessing if NO_TM_ZONE is defined.  Similarly for TM_GMTOFF.  */
+#if (defined __GLIBC__ \
+     || defined __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__ \
+     || (defined __APPLE__ && defined __MACH__))
+# if !defined TM_GMTOFF && !defined NO_TM_GMTOFF
+#  define TM_GMTOFF tm_gmtoff
+# endif
+# if !defined TM_ZONE && !defined NO_TM_ZONE
+#  define TM_ZONE tm_zone
+# endif
+#endif
+
+/*
+** Define functions that are ABI compatible with NetBSD but have
+** better prototypes.  NetBSD 6.1.4 defines a pointer type timezone_t
+** and labors under the misconception that 'const timezone_t' is a
+** pointer to a constant.  This use of 'const' is ineffective, so it
+** is not done here.  What we call 'struct state' NetBSD calls
+** 'struct __state', but this is a private name so it doesn't matter.
+*/
+#if NETBSD_INSPIRED
+typedef struct state *timezone_t;
+struct tm *localtime_rz(timezone_t restrict, time_t const *restrict,
+			struct tm *restrict);
+time_t mktime_z(timezone_t restrict, struct tm *restrict);
+timezone_t tzalloc(char const *);
+void tzfree(timezone_t);
+# ifdef STD_INSPIRED
+#  if !defined posix2time_z || defined time_tz
+time_t posix2time_z(timezone_t, time_t) ATTRIBUTE_PURE;
+#  endif
+#  if !defined time2posix_z || defined time_tz
+time_t time2posix_z(timezone_t, time_t) ATTRIBUTE_PURE;
+#  endif
+# endif
+#endif
 
 /*
 ** Finally, some convenience items.
 */
 
-#ifndef TRUE
-#define TRUE	1
-#endif /* !defined TRUE */
-
-#ifndef FALSE
-#define FALSE	0
-#endif /* !defined FALSE */
+#if __STDC_VERSION__ < 199901
+# define true 1
+# define false 0
+# define bool int
+#else
+# include <stdbool.h>
+#endif
 
 #ifndef TYPE_BIT
 #define TYPE_BIT(type)	(sizeof (type) * CHAR_BIT)
@@ -330,14 +491,14 @@
 
 #define TWOS_COMPLEMENT(t) ((t) ~ (t) 0 < 0)
 
-  /* Max and min values of the integer type T, of which only the bottom
-   *    B bits are used, and where the highest-order used bit is considered
-   *       to be a sign bit if T is signed.  */
-#define MAXVAL(t, b)            \
-      ((t) (((t) 1 << ((b) - 1 - TYPE_SIGNED(t)))     \
-          - 1 + ((t) 1 << ((b) - 1 - TYPE_SIGNED(t)))))
-#define MINVAL(t, b)            \
-      ((t) (TYPE_SIGNED(t) ? - TWOS_COMPLEMENT(t) - MAXVAL(t, b) : 0))
+/* Max and min values of the integer type T, of which only the bottom
+   B bits are used, and where the highest-order used bit is considered
+   to be a sign bit if T is signed.  */
+#define MAXVAL(t, b)						\
+  ((t) (((t) 1 << ((b) - 1 - TYPE_SIGNED(t)))			\
+	- 1 + ((t) 1 << ((b) - 1 - TYPE_SIGNED(t)))))
+#define MINVAL(t, b)						\
+  ((t) (TYPE_SIGNED(t) ? - TWOS_COMPLEMENT(t) - MAXVAL(t, b) : 0))
 
 /* The minimum and maximum finite time values.  This assumes no padding.  */
 static time_t const time_t_min = MINVAL(time_t, TYPE_BIT(time_t));
@@ -365,6 +526,10 @@
 # define INITIALIZE(x)
 #endif
 
+#ifndef UNINIT_TRAP
+# define UNINIT_TRAP 0
+#endif
+
 /*
 ** For the benefit of GNU folk...
 ** '_(MSGID)' uses the current locale's message library string for MSGID.
@@ -379,7 +544,7 @@
 #endif /* !HAVE_GETTEXT */
 #endif /* !defined _ */
 
-#if !defined TZ_DOMAIN && defined TZ_DOMAINDIR
+#if !defined TZ_DOMAIN && defined HAVE_GETTEXT
 # define TZ_DOMAIN "tz"
 #endif
 
@@ -410,8 +575,4 @@
 #define SECSPERREPEAT_BITS	34	/* ceil(log2(SECSPERREPEAT)) */
 #endif /* !defined SECSPERREPEAT_BITS */
 
-/*
-** UNIX was a registered trademark of The Open Group in 2003.
-*/
-
 #endif /* !defined PRIVATE_H */