[gnat] reuse of ASTs already constructed

[Arnaud Charlet]

> --- single/blanks_to_underscores.ali  2012-06-23 18:15:09
> +++ multi/blanks_to_underscores.ali   2012-06-23 19:07:39
> @@ -7,20 +7,17 @@
>  .....
> -X 3 blanks_to_underscores.adb
> +X 1 blanks_to_underscores.adb
> 
> In multi source compilations, main units may get assigned different
> unit numbers than in single source compilations; this is due to the
> reuse of entries in the Lib.Units table.
> 
> Is that tolerable?

You'd need to check whether the IDEs (in particular GPS) will not have
troubles with this.

Arno