The headers in this directory are for compiling on Mac OS X 10.4 and newer.
The Mac OS X 10.4 and subsequent releases include the ICU binary, but not ICU headers.

For other platforms, installed ICU headers should be used rather than these.
They are specific to the Mac OS X platform.

The headers here are from ICU version 55.1 downloaded from the ICU project.
http://site.icu-project.org/download/55#TOC-ICU4C-Download

The following changes are needed again if you update the files:
utypes.h:62 U_SHOW_CPLUSPLUS_API 0
uconfig.h:90 U_DISABLE_RENAMING 1