From 021533bcc19e49cb7f373ed096caa1adfd03b862 Mon Sep 17 00:00:00 2001
From: Simon Evans <si@si.org>
Date: Thu, 17 Jan 2019 18:49:09 +0000
Subject: [PATCH] Add ICU version check to ensure minimum of version 61 is
 used.

---
 CMakeLists.txt                | 6 ++++++
 CoreFoundation/CMakeLists.txt | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3a94e59193..d77e26de0e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,6 +20,12 @@ find_package(CURL REQUIRED)
 find_package(ICU COMPONENTS uc i18n REQUIRED)
 find_package(LibXml2 REQUIRED)
 
+set(ICU_MINIMUM_VERSION 61)
+if(ICU_VERSION VERSION_LESS ${ICU_MINIMUM_VERSION})
+  message(FATAL_ERROR "ICU version ${ICU_VERSION} is less than required version ${ICU_MINIMUM_VERSION}")
+endif()
+
+
 include(SwiftSupport)
 include(GNUInstallDirs)
 include(ExternalProject)
diff --git a/CoreFoundation/CMakeLists.txt b/CoreFoundation/CMakeLists.txt
index 03b1128f97..63ec33d489 100644
--- a/CoreFoundation/CMakeLists.txt
+++ b/CoreFoundation/CMakeLists.txt
@@ -378,6 +378,12 @@ if(NOT CMAKE_SYSTEM_NAME STREQUAL Darwin)
                              PRIVATE
                                ${CURL_INCLUDE_DIRS})
   find_package(ICU COMPONENTS uc i18n REQUIRED)
+
+  set(ICU_MINIMUM_VERSION 61)
+  if(ICU_VERSION VERSION_LESS ${ICU_MINIMUM_VERSION})
+    message(FATAL_ERROR "ICU version ${ICU_VERSION} is less than required version ${ICU_MINIMUM_VERSION}")
+  endif()
+  message(STATUS "ICU_INCLUDE_DIR: ${ICU_INCLUDE_DIR}")
   target_include_directories(CoreFoundation
                              PRIVATE
                                ${ICU_INCLUDE_DIR})