On Tue Sep 10 08:13:36 2013, [email protected] (Paul Smith) wrote:
>
> On Mon, 2013-09-09 at 17:45 -0700, Adam Kellas wrote:
> > I'm having a problem using these two together. There's a program which
> > spits out a series of variable assignments so I need $(shell) to
> > invoke it, but the shell function strips newlines which garbles the
> > result. Example below. Ideas?
> >
> > % cat Makefile
> > $(eval $(shell ./vars.sh))
>
> There's no way to avoid this feature of the shell function. The best I
> can suggest is that you write the output to a temporary file, then
> include that; something like:
>
> TMPFILE := $(shell var=`mktemp /tmp/mk.XXXXXX`; ./vars.sh > $$var; echo
> $$var)
> include $(TMPFILE)
> __d := $(shell rm -f $(TMPFILE))
>
I think I'd usually prefer an explicitly included makefile fragment.
This offers a cleaner syntax and a few more options,
e.g. making generation conditional on the generating script:
include vars.mk
vars.mk: vars.sh
$< > $@ || rm -f $@
--
Reinier Post
http://www.win.tue.nl/~rp/
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