maybe ot: make vs nmake

[Massimiliano Cialdi]

I need to write a makefile, for microsoft nmake, with some string function.

for example with gnu make I write:

comma:= ,
empty:=
space:= $(empty) $(empty)
foo:= a    \
        b \
        c
bar:= $(subst $(space),$(comma),$(strip $(foo)))

How can I write it in nmake (if it is possible)?

thanks