[patch] Check config at app build time

[Jules Bergmann]

This patch adds a app_config() function that returns a string for the 
library's configuration at application build time.  It is identical in 
format to library_config(), which is the library's configuration at 
library build time.

By comparing the output of these two functions, you can check whether 
you're using the same configuration as when the library was originally 
built.  This should be useful for folks using eclipse to make sure 
they've correctly cut-and-pasted the phalanx of options from the 
pkg-config file into eclipse.

Ok to apply?

				-- Jules

-- 
Jules Bergmann
CodeSourcery
jules at codesourcery.com
(650) 331-3385 x705
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