Re: GNU Autoconf test version 2.59d available

[Ralf Wildenhues]

Hello Akim,

* Akim Demaille wrote on Tue, Jun 13, 2006 at 12:14:15PM CEST:
> 
> I would like to suggest embedding a probe in Autoconf's test suite to
> check whether `!' (not as an argument to `test', but as a prefix for
> any command) is portable or not.  The documentation says it is not
> portable, but I haven't seen a machine that doesn't support it.  Yet
> it is very handy in many situations.

$ cat foo.sh
if ! false; then echo yes; fi
$ /bin/sh foo.sh
foo.sh: !: not found
$ config.guess
alphaev67-dec-osf5.1

It also fails with Solaris /bin/sh, as documented in "Limitations of
Builtins".

Cheers,
Ralf