compiling without changing main.c

[dcTom]

if the main.c is not changed but the file controller.c has some changing, the makefile is doing nothing,
i always have to change the main.c and save it.
is there a way that the makefile is compiling everything again, although nothing has been changed at main.c?

[T_chan]

Maybe try:

make clean
make

(1st command deletes intermediate objects normally)

[BlueCrab]

If you really want it to recompile main.c even though it hasn't changed, then you probably should be running "make clean" as was said. That said, unless you're doing something like '#include "controller.c"' in main.c, then you shouldn't need to recompile main.c if it hasn't changed...

If you only want it recompiling the file that changed and redoing the linking step, then if you set up dependencies correctly in your Makefile, that should happen already. If you're actually #include'ing the controller.c in main.c, then you can also use dependencies to deal with that in your Makefile (but you really shouldn't be doing that with #include -- that's what the linker is for).