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Date:	Tue, 04 May 1999 15:19:58 +0200 (CEST)
From:	"Markus F.X.J. Oberhumer" <markus DOT oberhumer AT jk DOT uni-linz DOT ac DOT at>
To:	djgpp-workers AT delorie DOT com
Subject:	RE: v2.03: wrapping up
Cc:	Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>, Michel AT smr DOT nl
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On 04-May-99 Michel de Ruiter wrote:
> It doesn't *solve* it of course. It's an alternative to @@.
> @ as well as { and } can appear in filenames, same problem
> there.
> 
>> Are you suggesting to say "/dev/env/DJDIR{c:/djgpp}", that is, to use 
>> the string inside the braces as the default value?
> 
> Yes. Are there any drawbacks I am not aware of (of course there are,
> but what are they)?

Two comments on this:

1) /dev/env/DJDIR{c:/djgpp}/bin will get mis-expanded by csh/tcsh

2) the {} looks like a repeat-quantifier in a Perl regexp

Not sure if this is a real problem, but to avoid any possible
future incompatibilities I'd suggest a style that is

1) no glob expression
2) no posix/sed/perl regexp
3) not expanded by any common DOS/Unix shell
4) not expanded by any version of make/dmake/pmake/...
5) not expanded by Automake (Makefile.am -> Makefile.in)
6) not expanded by Autoconf (Makefile.in -> Makefile)
7) is a valid target-filename for make

Actually /dev/env/DJDIR=c:/djgpp=/bin would be nice, but as said
in my previous mail this has the drawback that you cannot assign
a '=' to a shell variable under most DOS shells, and maybe
it also doesn't fulfill 5 & 7 above (not tried).

I still think that /dev/env/DJDIR~c:/djgpp~/bin could work, but we
should definitely do more testing before deciding on this.

Any other suggestions ?

-----   Markus F.X.J. Oberhumer <markus DOT oberhumer AT jk DOT uni-linz DOT ac DOT at>   -----
-----             http://wildsau.idv.uni-linz.ac.at/mfx/               -----
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