Compilation error with CMake 3.20.* on Ubuntu 18.04

[AntoineGautier]

Running cmake --build . --target install we get

cc1: fatal error: CMakeFiles/lib_obj.dir/algorithmRectangle.c.d: No such file or directory
compilation terminated.
...

This is due to the new flag -MF in the generated build/src/CMakeFiles/lib_obj.dir/build.make:

	@$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --green --progress-dir=/home/agautier/gitrepo/funnel/build/CMakeFiles --progress-num=$(CMAKE_PROGRESS_1) "Building C object src/CMakeFiles/lib_obj.dir/algorithmRectangle.c.o"
	cd /home/agautier/gitrepo/funnel/build/src && /usr/bin/cc $(C_DEFINES) $(C_INCLUDES) $(C_FLAGS) -MD -MT src/CMakeFiles/lib_obj.dir/algorithmRectangle.c.o -MF CMakeFiles/lib_obj.dir/algorithmRectangle.c.o.d -o CMakeFiles/lib_obj.dir/algorithmRectangle.c.o -c /home/agautier/gitrepo/funnel/src/algorithmRectangle.c

as opposed to

	@$(CMAKE_COMMAND) -E cmake_echo_color --switch=$(COLOR) --green --progress-dir=/Users/agautier/gitrepo/funnel/build/CMakeFiles --progress-num=$(CMAKE_PROGRESS_1) "Building C object src/CMakeFiles/lib_obj.dir/algorithmRectangle.c.o"
	cd /Users/agautier/gitrepo/funnel/build/src && /Library/Developer/CommandLineTools/usr/bin/cc $(C_DEFINES) $(C_INCLUDES) $(C_FLAGS) -o CMakeFiles/lib_obj.dir/algorithmRectangle.c.o -c /Users/agautier/gitrepo/funnel/src/algorithmRectangle.c

[AntoineGautier]

Closing as CMake version has been updated to 3.22 via PR #66.