Question

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 ?

Answer 1

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.