ICU-12895 ICU4C Readme, mention C++11, utf-8 source files and UChar being char16_t.
X-SVN-Rev: 39633
diff --git a/icu4c/readme.html b/icu4c/readme.html
index 5ec7201..f7843f4 100644
--- a/icu4c/readme.html
+++ b/icu4c/readme.html
@@ -246,10 +246,19 @@
For more news about this release, as well as late-breaking news, see the
<a href="http://site.icu-project.org/download/57">ICU download page</a>.</p>
+ <h3>New for 59 Milestone 1</h3>
+ <ul>
+ <li>Compiler support for C++11 is required for building the ICU libraries.</li>
+ <li>All source files are UTF-8 encoded. On platforms where the native charset is not UTF-8,
+ including Windows, check the settings of your editor before working with the source.</li>
+ <li>The type of UChar is char16_t, on all platforms. This is no longer configurable.
+ This change may affect Windows code with assumptions that UChar was wchar_t, and thus
+ type compatible with other Windows code expecting wchar_t strings.</li>
+ </ul>
+
<h3>Upcoming changes</h3>
<p>Please note the following changes planned for an upcoming ICU4C release (likely ICU 59):</p>
<ul>
- <li>Compiler support for C++11 will be required.</li>
<li>Support for Windows XP will be removed.</li>
</ul>
