Require at least CMake 2.8.9.

CMakeLists.txt

@@ -23,7 +23,7 @@
 #   DEALINGS IN THE SOFTWARE.
 #
 
-cmake_minimum_required(VERSION 2.8.8)
+cmake_minimum_required(VERSION 2.8.9)
 project(Magnum)
 
 # Find Corrade first so we can check on the target

README.md

@@ -89,7 +89,7 @@ Minimal dependencies
     >= 3.1. On Windows you can use **MinGW**. GCC 4.6, 4.5, 4.4 and **MSVC**
     2013 support involves some ugly workarounds and thus is available only in
     `compatibility` branch.
-*   **CMake** >= 2.8.8
+*   **CMake** >= 2.8.9
 *   **Corrade** - Plugin management and utility library. You can get it at
     https://github.com/mosra/corrade.
 

doc/building.dox

@@ -37,7 +37,7 @@ Minimal set of tools and libraries required for building is:
     >= 3.1. On Windows you can use **MinGW**. GCC 4.6, 4.5, 4.4 and **MSVC**
     2013 support involves some ugly workarounds and thus is available only in
     `compatibility` branch.
--   **CMake** >= 2.8.8
+-   **CMake** >= 2.8.9
 -   **Corrade** - Plugin management and utility library. See
     @ref building-corrade "Corrade download and installation guide" for more
     information.