easy: far easier than gradle and maven, imho even easier than go. Definitely easier than cmake.
- Having to learn weird syntax and constantly look up the reference manual (CMake) - Having to manually add source files (qmake) - Sometimes it just needs a clean and nobody knows why (Visual Studio) - Having to remember to set up debug and release builds and decide your directory layout for everything and figure out what 'a shadow build' is and who gives a crap since it all takes too much HDD space either way (qmake, CMake, make)
Also having tests built-in is really nice. Rust is the only language where I bother writing tests. Everything else makes it too hard, as if entry points into your binary are supposed to be rare and expensive.