iPhone Development

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Building Objective-C static libraries with categories

I just came across the usage of Linker flag -all_load and -ObjC

Basically, this is used in situations where you build a static library with Categories. When this static library is linked with the actual implemenation / application that use this library, -ObjC linker flag would inform the compiler to load all the Objective C classes implementation.

However, since there is a linker bug that prevents -ObjC from loading objects files from static libraries that contain only categories, we should use -all_load or -force_Load Linker flags.

For More Details. See Apple Technical QA QA1490


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