makefile - how to make clean without any modification? -

i have makefile huge library, when modify files not want compile library , make clean, @ first compile files clean. how can make clean without other modifications?

i have used

.phony: clean force
clean: force
rm *.o rm *.mod force:

i resolve problem using:

ifneq ($(makecmdgoals),clean)
-include $(objs:%.o=%.d)
endif

as zhertal says there's no way know sure without seeing definition of clean rule, @ least. there 2 possibilities this.

the first clean target listing prerequisite causing rebuild. unlikely, i've seen people things before.

the second, , more likely, cause you're using method described in gnu make manual automatically generating prerequisites, add %.d pattern %.o pattern rule , -include .d files. problem here make try make sure makefile date first before running targets, , means trying rebuild included .d files, means recompiling everything.

you have 2 options fix this. first put include line inside conditional doesn't run if make clean, this:

ifeq ($(filter clean,$(makecmdgoals)),)   -include $(objs:%.o=%.d) endif 

of course, have tweaked if have more clean-type rules (distclean etc.)

the other rework way auto-generated makefiles use more modern, advanced method. can find description @ advanced auto-dependencies