[Bug testsuite/27476] ACATS: Ada testsuite Bourne shell compatibility problem on hpux

[Arnaud Charlet]

>------ Comment #4 from pinskia at gcc dot gnu dot org  2006-05-08 16:31 -------
> [ "x${main}" != "x" ] should also work and maybe a little more portable.

That's also fine, although overkill these days.

All host OSes supported by GNAT (and more) accept the following simpler
and cleaner syntax:

 if [ "$main" != "" ]; then

or the other way around as needed here:

 if [ "$main" = "" ]; then

Arno