[cmake] Require CMake 3.1 similar to dune-common 2.6

Otherwise it will lead to CMake warnings and might break code.

[cmake] Require CMake 3.1 similar to dune-common 2.6
539f3328 · Christoph Grüninger · Timo Koch · 9beef0a6 · 539f3328
Commit 539f3328 authored 7 years ago by Christoph Grüninger Committed by Timo Koch 7 years ago
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,7 @@
 project("dumux" C CXX)

 # general stuff
-cmake_minimum_required(VERSION 2.8.12)
+cmake_minimum_required(VERSION 3.1)

 if(NOT (dune-common_DIR
        OR dune-common_ROOT