Change Details

CXX_STANDARD is only available since 3.1. $ git show 913394af2: cmTarget: Add CXX_STANDARD and CXX_EXTENSION... $ git tag --contains 205215fb8 | head -n: v3.1.0 3.1 also has CMakePackageConfigHelpers (available since 3.0), allowing to drop ECMPackageConfigHelpers (it actually fixes a CMake warning when requiring >=3.0). Furthermore move cmake_minimum_required(VERSION 3.1 FATAL_ERROR) to the top of CMakeLists.txt like suggested by CMake's documentation.

CXX_STANDARD is only available since 3.1. $ git show 913394af2: cmTarget: Add CXX_STANDARD and CXX_EXTENSION... $ git tag --contains 913394af2 | head -n: v3.1.0 3.1 also has CMakePackageConfigHelpers (available since 3.0), allowing to drop ECMPackageConfigHelpers (it actually fixes a CMake warning when requiring >=3.0). Furthermore move cmake_minimum_required(VERSION 3.1 FATAL_ERROR) to the top of CMakeLists.txt like suggested by CMake's documentation.

CXX_STANDARD is only available since 3.1. $ git show 913394af2: cmTarget: Add CXX_STANDARD and CXX_EXTENSION... $ git tag --contains 205215fb8913394af2 | head -n: v3.1.0 3.1 also has CMakePackageConfigHelpers (available since 3.0), allowing to drop ECMPackageConfigHelpers (it actually fixes a CMake warning when requiring >=3.0). Furthermore move cmake_minimum_required(VERSION 3.1 FATAL_ERROR) to the top of CMakeLists.txt like suggested by CMake's documentation.