Update minimum CMake version to 3.6

We can't really claim to work with cmake 2.8 any more, since we no longer have machines that use such an old version, so update to match the oldest version we use.
salilab · Nov 12, 2024 · 05b6e7d · 05b6e7d
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diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8.12...3.6.0)
+cmake_minimum_required(VERSION 3.6.0)
 
 project(IMP)
 

diff --git a/doc/manual/installation.md b/doc/manual/installation.md
@@ -36,7 +36,7 @@ In order to build %IMP from source, you will need:
 
 - A C++ compiler that supports the C++11 standard, such as gcc, clang,
   or Microsoft Visual Studio 2017 or later.
-- [CMake](https://cmake.org) (2.8.12 or later; 3.14 or later is recommended)
+- [CMake](https://cmake.org) (3.6 or later; 3.14 or later is recommended)
 - [Boost](https://www.boost.org) (1.53 or later; Boost.Iostreams must be built
   with its [zlib filter enabled](https://www.boost.org/doc/libs/1_67_0/libs/iostreams/doc/installation.html))
 - [Eigen](https://eigen.tuxfamily.org/) (3.0 or later)