Sets the build directory for CMake projects to be the "build" directory below where CMakeLists.txt is

set-cmake-build-dir.el

(add-hook 'c++-mode-hook
          (lambda ()
            (if (not (boundp 'cmake-ide-build-dir))
                (let* ((cmake-lists (locate-dominating-file default-directory "CMakeLists.txt"))
                   (cmake-build (concat cmake-lists "build")))
                  (if (and cmake-lists (file-exists-p cmake-build))
                      (progn
                        (setq cmake-ide-build-dir cmake-build)
                        (global-set-key (kbd "s-.") 'cmake-ide-compile)))))))