From the CMake documentation of the FILE command:
"We do not recommend using GLOB to collect a list of source files from your
source tree. If no CMakeLists.txt file changes when a source is added or
removed then the generated build system cannot know when to ask CMake to
regenerate."
(based on commit [12390] - f123635)
Signed-off-by: DasBlub <DasBlub@gmail.com>