From: Peter Edberg <pedberg@unicode.org>
Date: Wed, 31 Mar 2021 22:29:09 +0000 (-0700)
Subject: ICU-21546 brs 69, add note about genren process
X-Git-Tag: release-69-1~9
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=544d097fa36018bb48ce774464f438b34c482cf0;p=icu

ICU-21546 brs 69, add note about genren process
---

diff --git a/icu4c/source/tools/genren/README b/icu4c/source/tools/genren/README
index e2e13bc3ed1..a18c294136d 100644
--- a/icu4c/source/tools/genren/README
+++ b/icu4c/source/tools/genren/README
@@ -20,6 +20,14 @@ This is prerequisite for the icu layoutex (Paragraph Layout) project, which is s
     cd icu4c/source
     svn export https://github.com/behdad/icu-le-hb/trunk/src layout
 
+(As an alternative to the above handling of layout engine header files, you can do the following:
+1. In the Makefile in this directory, temporarily delete $(LEX) from the list of objects for LIBS
+   before running make install-header
+2. After running make install-header, restore the deleted $(LEX) in the Makefile
+3. Then when comparing the old urename.h to the newly generated one, copy all of the lines beginning
+   "#define pl_" from the old version to the new one.
+ - Peter E)
+
 - Regenerate urename.h
 
     cd icu4c/source/tools/genren