Getting the 'sysconfdir'

[Jason Curl]

From previous posts to automake, it appears the best way to manage my 
configuration files is using $(sysconfdir)

So in my configure.ac I have the following that my program can use to 
find out where the configuration directory was configured to pull in the 
default when the user doesn't provide an alternative.

  AC_DEFINE_UNQUOTE(SYSCONFDIR, [$sysconfdir], [Configuration directory])

What doesn't work, $sysconfdir = ${prefix}/etc as default. This means I 
need to recursively substitute until I have a complete path. How can I 
do this?

So I need to figure out how to generate a full path name. It doesn't 
seem desirable to use the path of the program as a base, as 
--sysconfdir= can be independent of --prefix. Further, printing the 
contents of $prefix returns "NONE" instead of what I would have expected 
'/usr/local'. If one is provided then it shows what I expect.

Thanks,
Jason.