Bartlett Publishing has put together several lists of books available from many various publishers which are essential reading for anyone interested in the topic. Check them out today!
You can view the articles from the blogs which preceded these at the following URLs:
Objective-C PostgreSQL stuff:
gcc -dynamiclib -install_name /usr/local/lib/libfoo.2.dylib -compatibility_version 2.4 -current_version 2.4.5 -o libfoo.2.4.5.dylib source.o code.o
I have also seen the options -undefined suppress -flat_namespace here
Another dylib link
Caution mixing shared and archive libs
Seth Godin - how to run a useless conference