X-Git-Url: https://git.saurik.com/apple/icu.git/blobdiff_plain/4388f060552cc537e71e957d32f35e9d75a61233..0f5d89e82340278ed3d7d50029f37cab2c41a57e:/icuSources/tools/genren/README

diff --git a/icuSources/tools/genren/README b/icuSources/tools/genren/README
index 6f02deff..f4cc4db0 100644
--- a/icuSources/tools/genren/README
+++ b/icuSources/tools/genren/README
@@ -1,3 +1,4 @@
+Copyright (C) 2016 and later: Unicode, Inc. and others. License & terms of use: http://www.unicode.org/copyright.html
 Copyright (c) 2002-2011, International Business Machines Corporation and others. All Rights Reserved.
 The genren.pl script is used to generate source/common/unicode/urename.h header file, which is needed for renaming the ICU exported names. 
 
@@ -8,13 +9,26 @@ It also does not currently work well in an out-of-source situation.
 The following instructions are for Linux version.
 - urename.h file should be generated after implementation is complete for a release.
 - the version number for a release should be set according to the list in source/common/unicode/uvernum.h
-- In this [genren] directory, run 
 
-    "make install-header"
+Before generating urename.h, the layout engine header files must be installed from the harfbuzz project.
+This is prerequisite for the icu layoutex (Paragraph Layout) project, which is subject to renaming.
+(Using the svn command is the simplest way of getting just the files from one subdirectory of the git project.)
+
+    cd icu4c/source
+    svn export https://github.com/behdad/icu-le-hb/trunk/src layout
+
+- Regenerate urename.h
+
+    cd icu4c/source/tools/genren
+    make install-header
 
 - urename.h will be updated in icu/source/common/unicode/urename.h  **in your original source directory**
+- Warnings concerning bad namespace (not 'icu') on UCaseMap can be ignored.
 - Eyeball the new file for errors
 
+    cd icu4c/source
+    svn diff common/unicode/urename.h
+
 - Other make targets here
 
     clean      - cleans out intermediate files