I have a Makefile with a set of booleans which must be used to control the flags for an external application. The problem is that the flag must be passed as a comma-separated string.

Something like this (non-working pseudo code):

WITH_LIST = ""
WITHOUT_LIST = ""

ifeq ($(BOOL_A),y)
    # Append A to list "WITH_LIST"
else
    # Append A to list "WITHOUT_LIST"
endif

ifeq ($(BOOL_B),y)
    # Append B to list "WITH_LIST"
else
    # Append B to list "WITHOUT_LIST"
endif

ifeq ($(BOOL_C),y)
    # Append C to list "WITH_LIST"
else
    # Append C to list "WITHOUT_LIST"
endif

Now assuming BOOL_A == y, BOOL_B == n and BOOL_C == y, I need to run the following command:

./app --with=A,C --with-out=B

How can I generate these string using Gnu Make?

makefile gnu-make
Edit
Report