CMake output/build directory

Question

I\'m pretty new to CMake, and read a few tutorials on how to use it, and wrote some complicated 50 lines of CMake script in order to make a program for 3 different compilers

Answer 1

Turning my comment into an answer:

In case anyone did what I did, which was start by putting all the build files in the source directory:

cd src
cmake .

cmake will put a bunch of build files and cache files (CMakeCache.txt, CMakeFiles, cmake_install.cmake, etc) in the src dir.

To change to an out of source build, I had to remove all of those files. Then I could do what @Angew recommended in his answer:

mkdir -p src/build
cd src/build
cmake ..