On 2014-10-27 Eric Blake <ebl...@redhat.com> wrote: > On 10/27/2014 11:11 AM, Nick Bowler wrote: > > On 2014-10-26 22:15 +0200, fr33domlover wrote: > >> I'm a bit confused about all the expressive features and ways to use > >> makefile variables, so just to be sure - > >> > >> http://www.gnu.org/software/make/manual/html_node/Substitution-Refs.html > >> > >> Are these uses of variables portable, or should a portable Makefile.am use > >> only the plain $(var) form without the tricks? > > > > The first form of expansion on that page, $(var:.a=.b), should be OK. > > They are standard in POSIX and work on all make implementations that I > > know of. > > > > The version with % characters is not portable. > > That said, POSIX is hoping to standardize it in the next few years: > > http://austingroupbugs.net/view.php?id=519 >
Hmmm I was sure it's portable because `make distcheck` doesn't complain about the %s, and I'm using -Werror and -Wall automake flags. How bad is it? I suppose it's not specific to just GNU make alone?
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