AIX/SOLARIS/CYGWIN: Fix build failure due in PosixTimezoneCache

src/base/platform/platform-posix.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Platform-specific code for POSIX goes here. This is not a platform on its
 // own, but contains the parts which are the same across the POSIX platforms
 // Linux, MacOS, FreeBSD, OpenBSD, NetBSD and QNX.
 
 #include <errno.h>
 #include <limits.h>
@@ skipping 364 matching lines @@
   *secs = static_cast<uint32_t>(usage.ru_utime.tv_sec);
   *usecs = static_cast<uint32_t>(usage.ru_utime.tv_usec);
   return 0;
 }
 
 
 double OS::TimeCurrentMillis() {
   return Time::Now().ToJsTime();
 }
 
+#if !V8_OS_AIX && !V8_OS_SOLARIS && !V8_OS_CYGWIN
 const char* PosixTimezoneCache::LocalTimezone(double time) {
   if (std::isnan(time)) return "";
   time_t tv = static_cast<time_t>(std::floor(time / msPerSecond));
   struct tm tm;
   struct tm* t = localtime_r(&tv, &tm);
   if (!t || !t->tm_zone) return "";
   return t->tm_zone;
 }
 
 double PosixTimezoneCache::LocalTimeOffset() {
   time_t tv = time(NULL);
   struct tm tm;
   struct tm* t = localtime_r(&tv, &tm);
   // tm_gmtoff includes any daylight savings offset, so subtract it.
   return static_cast<double>(t->tm_gmtoff * msPerSecond -
                              (t->tm_isdst > 0 ? 3600 * msPerSecond : 0));
 }
+#endif
 
 double PosixTimezoneCache::DaylightSavingsOffset(double time) {
   if (std::isnan(time)) return std::numeric_limits<double>::quiet_NaN();
   time_t tv = static_cast<time_t>(std::floor(time/msPerSecond));
   struct tm tm;
   struct tm* t = localtime_r(&tv, &tm);
   if (NULL == t) return std::numeric_limits<double>::quiet_NaN();
   return t->tm_isdst > 0 ? 3600 * msPerSecond : 0;
 }
 
@@ skipping 357 matching lines @@
 
 void Thread::SetThreadLocal(LocalStorageKey key, void* value) {
   pthread_key_t pthread_key = LocalKeyToPthreadKey(key);
   int result = pthread_setspecific(pthread_key, value);
   DCHECK_EQ(0, result);
   USE(result);
 }
 
 }  // namespace base
 }  // namespace v8