Question

I want to define some macros only for some make targets. eg.

all : process1 process2

prcoess1: process1.c process.h

prcoess2: process2.c process.h

%.o:%.c
        $(CC) $(CCOPTS) -o $@ $<


CCOPTS += -DEXTRA1 
extra1 : clean all


CCOPTS += -DEXTRA2
extra2 : clean all

I want macro EXTRA1 to be defined only when I call make extra1. If I call make I don’t want EXTRA1 to be defined. How do I accomplish this?

Answer 1

extra1 : CCOPTS += -DEXTRA1 
extra1 : clean all

extra2 : CCOPTS += -DEXTRA2
extra2 : clean all

See §6.11 Target-specific Variable Values from the GNU make manual.