cmake for CentOS-7 is 2.8.11, and it fails event with the basic oneline
CMakeLists.txt (even if I export CMAKE_MAKE_PROGRAM=/.../ninja-1.7.1/ninja):
Right, so clearly not an IMP issue.
RFE for IMP CMakeLists.txt:
cmake_minimum_required(VERSION 2.8.3) -> cmake_minimum_required(VERSION 3.0) ?
IMP *doesn't* require cmake 3 - you already demonstrated that it works
just fine with cmake 2 if you use make rather than ninja. (And in fact
we also use cmake 2.8 with ninja all the time.)