Re: Warnings on '$\\'

[Alejandro Colomar]

Hi Dmitry,

I've written some test to see what works and what doesn't:

$ cat Makefile 
foo.h: FORCE
        $(file > $@,$(foo))
        @:

single:=\

double:=\\

empty:=

space:= #

define foo
Aa \\
Ba \$(single)
Bb \$(single)\
Bc $(single)\
Bd $(single)$(single)
Ca \$(double)
Cb \$(double)\
Cc $(double)\
Cd $(double)$(double)
Da \$(empty)
Db \$(empty)\
Dc $(empty)\
Ea \$(space)
Eb \$(space)\
Ec $(space)\
F
endef

FORCE:


$ make
$ cat foo.h 
Aa \\
Ba \
Bb \ Bc  Bd 
Ca \\\
Cb \\\ Cc \\ Cd \\\\
Da \
Db \ Dc  Ea \
Eb \ Ec  F


So, the following work:


Ba \$(single)
Da \$(empty)
Ea \$(space)


Of course, $(single) is really empty, since the escape is used to escape
the newline in the definition.  So I would go for \$(empty) or \$(space),
and for simplicity, I'd prefer \$(empty).

Dmitry, why did $\\ work for you ($\ being my $(empty)), and not for me
(as $(empty)\)?

Thanks,
Alex


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