From cc2a1759bd54d3322b858b8b7274de838bf8fe12 Mon Sep 17 00:00:00 2001
From: "Reece H. Dunn" <msclrhd@gmail.com>
Date: Wed, 16 Oct 2013 21:02:55 +0100
Subject: [PATCH] autotools: support specifying the Unicode/UCD version

---
 Makefile.am  |  2 +-
 configure.ac | 14 ++++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/Makefile.am b/Makefile.am
index 280bbecd..e823dec9 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -54,7 +54,7 @@ EXTRA_DIST += ChangeLog
 
 ############################# Unicode Character Database ######################
 
-UCD_VERSION=6.2.0
+UCD_VERSION=@UCD_VERSION@
 UCD_ROOTDIR=data/ucd
 
 data/language-subtag-registry:
diff --git a/configure.ac b/configure.ac
index 0df786e3..d40123b0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -19,6 +19,18 @@ AC_PROG_CXX
 AC_PROG_MAKE_SET
 AC_PROG_LIBTOOL
 
+dnl ================================================================
+dnl UCD data configuration.
+dnl ================================================================
+
+AC_ARG_WITH([unicode-version],
+    [AS_HELP_STRING([--unicode-version], [Unicode version to support @<:@default=6.2.0@:>@])],
+    [AS_IF([test x"$withval" != x],
+           [UCD_VERSION="$withval"])],
+    [UCD_VERSION="6.2.0"])
+
+AC_SUBST(UCD_VERSION)
+
 dnl ================================================================
 dnl Generate output.
 dnl ================================================================
@@ -34,4 +46,6 @@ AC_MSG_NOTICE([
 
         Compiler:                      ${CXX}
         Compiler flags:                ${CXXFLAGS}
+
+        Unicode version:               ${UCD_VERSION}
 ])