Issue #1971 - Part 2: Update ICU source to 63.2.

intl/icu/source/common/uposixdefs.h

@@ -1,4 +1,4 @@
-// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// © 2016 and later: Unicode, Inc. and others.
 // License & terms of use: http://www.unicode.org/copyright.html
 /*
 *******************************************************************************
@@ -6,7 +6,7 @@
 *   Corporation and others.  All Rights Reserved.
 *******************************************************************************
 *   file name:  uposixdefs.h
-*   encoding:   US-ASCII
+*   encoding:   UTF-8
 *   tab size:   8 (not used)
 *   indentation:4
 *
@@ -54,22 +54,18 @@
  *
  * z/OS needs this definition for timeval and to get usleep.
  */
-#if !defined(_XOPEN_SOURCE_EXTENDED) && (U_PLATFORM != U_PF_SOLARIS)
+#if !defined(_XOPEN_SOURCE_EXTENDED) && defined(__TOS_MVS__)
 #   define _XOPEN_SOURCE_EXTENDED 1
 #endif
 
-/*
- * There is an issue with turning on _XOPEN_SOURCE_EXTENDED on certain platforms.
- * A compatibility issue exists between turning on _XOPEN_SOURCE_EXTENDED and using
- * standard C++ string class. As a result, standard C++ string class needs to be
- * turned off for the follwing platforms:
- *  -AIX/VACPP
- *  -Solaris/GCC
+/**
+ * Solaris says:
+ *   "...it is invalid to compile an XPG6 or a POSIX.1-2001 application with anything other
+ *   than a c99 or later compiler."
+ * Apparently C++11 is not "or later". Work around this.
  */
-#if (U_PLATFORM == U_PF_AIX && !defined(__GNUC__)) || (U_PLATFORM == U_PF_SOLARIS && defined(__GNUC__))
-#   if _XOPEN_SOURCE_EXTENDED && !defined(U_HAVE_STD_STRING)
-#   define U_HAVE_STD_STRING 0
-#   endif
+#if defined(__cplusplus) && (defined(sun) || defined(__sun)) && !defined (_STDC_C99)
+#   define _STDC_C99
 #endif
 
 #endif  /* __UPOSIXDEFS_H__ */