Given the following Makefile,
<code>
define newline
endef
define cmd1
thing1
thing2
endef
help:
echo '$(subst $(newline),'$$'\n'',$(cmd1))'
.PHONY: help
</code>
, on an Ubuntu 22.04 system, GNU Make 4.3, Bash 5.1.16(1), and the
Makefile below, "make help" produces the following
<verbatim>
echo ' thing1'$\n'' thing2'
thing1$
thing2
</verbatim>
I believe the output should instead have been:
<verbatim>
echo ' thing1'$\n'' thing2'
thing1
thing2
</verbatim>
And indeed, an an Arch Linux system with the same version of Make and
Bash, it
does.
Furthermore, replacing "$\n" with "$\x0A" produced the following on the
"broken" Ubuntu system:
<verbatim>
echo ' thing1'$\n'' thing2'
thing1$\x0A thing2
</verbatim>
I'm at a loss to explain why the output is different on these two
systems, and
why that extra "$" character appears in the output on the first system,
which
seems even more wrong than the first example.
Can anyone reproduce this, and has anyone got any insights about what
the issue
might be?
--
Yorick
