Fix ICU time zone support on iOS

public/common/unicode/pmac.h

 /*
 ******************************************************************************
 *
 *   Copyright (C) 1997-2010, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 *
 ******************************************************************************
 *
 * Note: autoconf creates platform.h from platform.h.in at configure time.
 *
@@ skipping 32 matching lines @@
 
 /* Need platform.h when using CYGWINMSVC to get definitions above. Ignore everything else. */
 #ifndef CYGWINMSVC
 
 /** Define the platform we're on. */
 #ifndef U_DARWIN
 #define U_DARWIN
 #endif
 
 #include <AvailabilityMacros.h>
+#include <TargetConditionals.h>
+
+/**
+ * Add a second platform define to handle differences between Mac OS X and iOS
+ */
+#if TARGET_OS_IPHONE
+#ifndef U_IOS
+#define U_IOS
+#endif
+#endif
 
 /**
  * \def U_HAVE_DIRENT_H
  * Define whether dirent.h is available 
  * @internal
  */
 #ifndef U_HAVE_DIRENT_H
 #if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5
 #define U_HAVE_DIRENT_H 0
 #else
@@ skipping 218 matching lines @@
 #define U_HAVE_NL_LANGINFO_CODESET  1
 #endif
 
 #ifndef U_NL_LANGINFO_CODESET
 #define U_NL_LANGINFO_CODESET       CODESET
 #endif
 
 #if 1
 #define U_TZSET         tzset
 #endif
+#ifndef U_IOS
+/* The iOS version of timezone is busted (at least in the simulator, it is
+   never set to anything useful). Leave it undefined to avoid a code path
+   in putil.c. */
 #if MAC_OS_X_VERSION_MIN_REQUIRED < MAC_OS_X_VERSION_10_5
 #define U_TIMEZONE 0
 #else
 #define U_TIMEZONE timezone
 #endif
+#endif  // !U_IOS
 #if 1
 #define U_TZNAME        tzname
 #endif
 
 #define U_HAVE_MMAP     1
 #define U_HAVE_POPEN    1
 
 /** @} */
 
 /*===========================================================================*/
@@ skipping 109 matching lines @@
 /* On the Mac, we define U_WCHAR_IS_UTF32 to treat wchar_t as though it
    contains UTF-32 at all times.  Strictly speaking, that's not entirely
    correct given Mac's libc (__STDC_ISO_10646__ is not defined) , but provided
    that we ignore libc's locale support (by not calling setlocale) and its
    multibyte string support, this should be fine.  Our codebase makes enough
    other assumptions about a UTF-8 locale and UTF-32 wchar_t strings for this
    to make sense. */
 #define U_WCHAR_IS_UTF32
 
 #endif