How to create directories from makefiles?

Could you help me with the following code I have written?

VPATH= balll mall fall
OBJECTS= objj/goka.o objj/foka.o objj/hoka.o
exec/gola: $(OBJECTS)
    gcc $^  -o  $@  
$(OBJECTS): objj/%.o : %.c
    gcc -c  $<  -o  $@  

What I want to do is: I don't have exec directory and obj directory and I want them to be created during the compiling of the file and save those files in their respective directories. Can I do that? Creating the directory exec and telling the gcc to save the gola target file in exe开发者_如何学Pythonc directory and same with the objective files. Is there any command to deal with it?

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Try order-only prerequisites. (See the make manual).

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Just add mkdir -p dir1 dir2 to the appropriate rule of your makefile, prior to compilation.

Example: (You'll have to modify this for your particular setup)

DIR = obj exec
VPATH= balll mall fall
OBJECTS= objj/goka.o objj/foka.o objj/hoka.o

exec/gola:$(OBJECTS)
    gcc $^  -o  $@  
$(OBJECTS): objj/%.o : %.c
    mkdir -p $(DIR)
    gcc -c  $<  -o  $@