When resolving a line continuation $\<newline>, it normally resolves to
$<space>, then to blank. There is a corner case in make 4.2.1 where it seems
to resolve to the literal $ character instead. I have the following:
> cat tmp.mk
$(info version: $(shell $(MAKE) --version))
$(info TEST: 1$\
2)
$(info TEST: [$(or \
,$\
)])
all:
@echo building $@
> make -f tmp.mk
version: GNU Make 3.81 Copyright (C) 2006 Free Software Foundation, Inc. This
is free software; see the source for copying conditions. There is NO warranty;
not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. This program
built for x86_64-unknown-linux-gnu
TEST: 12
TEST: []
building all
> make2 -f tmp.mk
version: GNU Make 4.2.1 Built for x86_64-pc-linux-gnu Copyright (C) 1988-2016
Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html> This is free software: you are free to
change and redistribute it. There is NO WARRANTY, to the extent permitted by
law.
TEST: 12
TEST: [$]
building all
