Escaping characters in Makefiles 'addprefix'

Question

I have a list of libraries:

lib_paths := dir1 dir2 dir3

that I would like to add to my rpath via

LDFLAGS += (addprefix -Wl,-rpath,$(lib_paths))

Of course, this fails because , is the delimiter to the addprefix function in Makefiles. How can I escape the comma?

Answer 1

You have to put it in a variable. Make will break arguments on commas before it expands them, so:

comma = ,

LDFLAGS += $(addprefix -Wl$(comma)-rpath,$(lib_paths))

Answer 2

Basically -Wl,-rpath is just the short variant of -Xlinker -rpath=:

LDFLAGS += $(addprefix -Xlinker -rpath=,$(lib_paths))