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Comment by tom_ | Hacker News Reader

It looks like it doesn't deal with C/C++/etc. header files?

Yeah, you have to run GCC with `-MMD -MP` so you get .d files along with your .o files. Then in my own Makefile I have:

    include $(shell find $(BUILD_DIR) -type f -name '\*.d')

so that make will check for header file changes.

Alternative way without shelling out:

   SRC = $(wildcard src/\*.c)
   OBJ = $(SRC:.c=.o)
   SDEPS = $(SRC:.c=.d)
   EXE = myapp
   INC = include
   CFLAGS ?= -Os -MMD -MP
   LDFLAGS ?=
   %.o: %.c $(INC) Makefile
        $(CC) $(CFLAGS) -c $< -o $@
   $(EXE): $(OBJ)
        $(LD) $^ $(LDFLAGS) -o $@
   # near the bottom of your Makefile
   -include $(SDEPS)

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