Re: Prefer AM_CPPFLAGS to @CPPFLAGS@

[Eric Blake]

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According to Stepan Kasal on 6/11/2007 4:47 AM:
> Hello Ralf,
> 
> On Sun, Jun 10, 2007 at 09:13:14AM +0200, Ralf Wildenhues wrote:
>>> -CPPFLAGS = -DDATADIR='"$(datadir)"' @@CPPFLAGS@@
>>> +AM_CPPFLAGS = -DDATADIR='"$(datadir)"'
>> Why not show both (the non-Automake case is useful and conveys
>> additional information)?
> 
> A nice idea, but:
> 
> It would make the node too complex.
> The node "19.5 How Do I `#define' Installation Directories?" is in
> the FAQ section, so people might expect it is short.

True, but AM_CPPFLAGS is not provided by autoconf, and autoconf can be run
independently of automake.  I think we should either provide both
examples, or at least provide a clear disclaimer that this example only
works if you also use Automake, along with a pointer to somewhere else in
the manual on how to do it when avoiding automake.

- --
Don't work too hard, make some time for fun as well!

Eric Blake             address@hidden
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