To create an umbrella framework you need at least 2 frameworks: Wrapper.framework and Sub.framework. What we want to do is make Sub a sub-framwork of the umbrella Wrapper.

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In the Sub Framework target add the folowing to the “Other Linker Flags” :

-seg1addr 0xXXXXXXXX -umbrella Wrapper

In the Wrapper Framework target add the folowing to the “Other Linker Flags” :

-seg1addr 0xYYYYYYYY -sub_umbrella SUB -framework SUB

Where each ‘X’ and each ‘Y’ is a hex value between 0 and f

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then in the Wrapper Framework target add a new ‘Copy Files Build Phase’ with ‘Frameworks’ as destination. Add Sub.framework to the Copy files list.

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At last you need to add a ‘Shell Script Build Phase’ to the Wrapper target with the following code

cd $BUILD_DIR/Wrapper.framework/ ln -sf ./Versions/Current/Frameworks/

Now first build the Sub.framework then build the Wrapper.framework

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by: General/SimonAndreasMenke

changed A and B to X and Y in the -seg1addr args, I found using A and B confusing, since they were actually valid values as well. –Theo

Yes I thought of it too but i was in class when i was writing it so i didn’t have the time to change it :-) – Simon

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Also, look at http://developer.apple.com/documentation/Performance/Conceptual/General/LaunchTime/Tasks/Prebinding.html for a list of suggested addresses for prebinding. 0xC0000000 to 0xEBFFFFFF seem like good choices, currently, as they are among the recommended third-party code address ranges for pre- and post-10.2 applications. –General/JediKnil

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i’ve encountered some problems with the shell script. so here is the correct one:

cd “$CONFIGURATION_BUILD_DIR/$FULL_PRODUCT_NAME/” ln -sf ./Versions/Current/Frameworks ./Frameworks

– General/SimonAndreasMenke