Re: [exim] Idea: Predefined macros

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Author: Philip Hazel
To: exim-users
CC: Magnus Holmgren
Subject: Re: [exim] Idea: Predefined macros
On Wed, 2 May 2007, Tony Finch wrote:

> On Wed, 25 Apr 2007, Magnus Holmgren wrote:
> > What do you think about having certain predefined macros available? One such
> > macro could be CONFDIR, and I can also imagine macros that are defined
> > according to which features are compiled in.
> >
> > The point of these macros would be enabling the writing of more reusable
> > configuration files/snippets, and for the macros being macros is so they can
> > be used .include and .ifdef directives, and also in settings that aren't
> > expanded.
> Sounds useful, especially for packagers like Debian.

Does anybody care about performance any more?

If you have a pile of macros defined, Exim is going to scan each config
line for those macros every time it reads the config, which is something
that it does often.

Philip Hazel            University of Cambridge Computing Service
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