Using a precompiled library on iPhone?

I am trying to make use of a c++ package in an iPhone app. Anyone have experience with doing this? I don't even know where to start. I assume there are steps I need to follow in xcode for it to build the package along with my project and then properly link it. How does this all work if there are specific makefiles in the package?
The packages I am attempting to use:
http://sites.google.com/site/ocropus
http://code.google.com/p/tesseract-ocr/
Any help would be much appreciated.

Two things:
First, the makefile issue. There are multiple ways of handling makefile-based projects in xcode:
http://developer.apple.com/documentation/Porting/Conceptual/PortingUnix/preparin g/chapter3_section4.html
Second, how to handle the code: do you want to have it compiled with your project and linked in as obj files, or do you want to have it linked in as a monolithic static lib? I've done the former easily, but for some reason couldn't actually do the latter. If your issue is with linking in an ARM-compiled static lib, then I can't help you there as I have that exact problem. As a workaround, just compile everything with your project.

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I like that I would be able to maintain my iPhoto library data for Faces and Places in Aperture, but am concerned that when the iPhoto library is "upgraded" for Aperture, and I decide I don't really need that program, the upgraded library won't work with iPhoto anymore.
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Like iphoto, Aperture can use the "single file library" or it can use a Referenced Library (just like iphoto can). Note that using a Referenced Library offers not a whit more in terms of features or capabilities. It's file storage plain and simple. Nothing more.
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But you my see Aperture or Lightroom struggles
Regards
TD

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Using a precompiled library on iPhone?

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