Check library information of a dylib file

There is a nifty command called “file” which will give you the architecture and type information about a library file.
Eg.

file /usr/lib/libosg.3.0.1.dylib

Gives me the following information

libosg.3.0.1.dylib: Mach-O 64-bit dynamically linked shared library x86_64

This information is especially useful when searching for explanations to strange Xcode linker errors

Tested on OSX 10.6.8 and file v5.03

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