CMakeLists.txt: bump CMake version to 3.15

This change fixes the following warning on the latest CMake versions:

CMake Deprecation Warning at CMakeLists.txt:1 (cmake_minimum_required):
  Compatibility with CMake < 3.10 will be removed from a future version
  of CMake.

  Update the VERSION argument <min> value.  Or, use the <min>...<max>
  syntax to tell CMake that the project requires at least <min> but has been
  updated to work with policies introduced by <max> or earlier.

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 949cbf4..90a1b6d 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.5 FATAL_ERROR)
+cmake_minimum_required(VERSION 3.15 FATAL_ERROR)
 
 message(STATUS "CMake version: ${CMAKE_VERSION}")