Jim Meyering <jim <at> meyering.net> writes:
> Yes, I noticed that it worked, too.
> Note that "`... "..." ...`" is not portable
> (see Shell Substitutions in "info autoconf").
> I'm not sure about "$(... "..." ...)".
"$(... "..." ...)" is portable, insofar as $() is portable. In other words,
every shell that manages the new style of command substitution manages this
particular syntax ("`""`" is tougher because of the rules on when embedded "
must be escaped, while $() gets rid of those escaping ambiguities). But
autoconf still recommends against $(), since Solaris /bin/sh still doesn't grok
it.
> > I'll also change the first '$((' to '$( (' so
> > that readers aren't confused with arithmetic expansion.
Also documented in the Autoconf portability section.
--
Eric Blake
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