Re: Version number constructed with m4_esyscmd not a literal?

[Gary V. Vaughan]

On 28 Feb 2011, at 06:12, Marko Lindqvist <address@hidden> wrote:

> Freeciv ( http://www.freeciv.org ) configure.ac has AC_INIT like this:
> 
> AC_INIT([freeciv], [m4_esyscmd([./fc_version | tr -d '\n'])])
> 
> 
> This results in warnings from aclocal, autoheader, autoconf and automake:
> configure.ac:5: warning: AC_INIT: not a literal:
> m4_esyscmd([./fc_version | tr -d '\n'])
> 
> Resulting configure seems to work correctly, and it even has correct line
> # Generated by GNU Autoconf 2.68 for freeciv 2.3.99-dev
> in it.
> 
> 
> What is wrong with our AC_INIT? I've seen use of m4_esyscmd
> recommended for similar cases in this list, so I assume it can be
> somehow used without such warning.

Removing the outer quotes will let m4_esyscmd run to completion during
argument collection, and (untested!) avoid the warning:

AC_INIT([freeciv], m4_esyscmd([./fc_version | tr -d '\n']))

Cheers,
-- 
Gary V. Vaughan (gary AT gnu DOT org)