From 7ceb9721e35e027a51fa3a6f1e1844048ab2b20d Mon Sep 17 00:00:00 2001
From: wmayer <wmayer@users.sourceforge.net>
Date: Sun, 29 Apr 2018 13:58:38 +0200
Subject: [PATCH] check for minimum Eigen3 version to build flatmesh module

---
 CMakeLists.txt | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index ab0ea3d23a..04a1005e56 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -789,6 +789,12 @@ endif()
                 "=================\n")
     ENDIF(NOT EIGEN3_FOUND)
 
+    if (${EIGEN3_VERSION} VERSION_LESS "3.3.1")
+        message(WARNING "Disable module flatmesh because it requires "
+                        "minimum Eigen3 version 3.3.1 but version ${EIGEN3_VERSION} was found")
+        set (BUILD_FLAT_MESH OFF)
+    endif()
+
 # -------------------------------- Qt --------------------------------
 
     if (NOT BUILD_QT5)