CODEWITHSUNDEEP
makefile
vdsf
vdsf

Reputation: 1618

Makefile - How to call other makefiles with dependencies

Hey, I have a simple "master" Makefile who simply calls other makefiles. I'm trying to do the following in order to build components in the right order:

LIB_A = folder_a
LIB_B = folder_b
LIB_C = folder_c

MY_TARGETS = $(LIB_A) $(LIB_B) $(LIB_C)

.PHONY: $(LIB_A)
$(LIB_A):
    @$(MAKE) -C $@;

.PHONY: $(LIB_B)
$(LIB_B):
    @$(MAKE) -C $@;

.PHONY: $(LIB_C)
$(LIB_C): $(LIB_A) $(LIB_B)
    @$(MAKE) -C $@;

.PHONY: all 
all: $(MY_TARGETS)

However, when I make, only LIB_A gets built.

(I don't even get a folder_b up-to-date message or whatever).

Any hint ?

Upvotes: 7

Views: 8765

Answers (2)

user2100815
user2100815

Reputation:

You need to make all the default. You can do this in either of these ways:

  • move it to be the first target in the file
  • Add .DEFAULT_GOAL := all

Alternatively, you could run make all instead of just make.

Upvotes: 8

Beta
Beta

Reputation: 99172

Neil Butterworth solved the problem, but you can also make this makefile a little more concise:

LIB_A = folder_a
LIB_B = folder_b
LIB_C = folder_c

MY_TARGETS = $(LIB_A) $(LIB_B) $(LIB_C)

.PHONY: all $(MY_TARGETS)
all: $(MY_TARGETS)

$(MY_TARGETS):
    @$(MAKE) -C $@;

$(LIB_C): $(LIB_A) $(LIB_B)

Upvotes: 8

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