How can I build the Universal Binary version of Coin

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How can I build the Universal Binary version of Coin?

To build the Universal Binary version of Coin (or SoQt, simage, SmallChange) pass the --enable-universal flag to configure. This should work both on PowerPC and Intel systems. (However, please note the issue related to building on PPC below.)

Note that in order to be able to create Universal Binaries, all libraries and frameworks that you link against must also be Universal. So e.g. to be able to create a UB version of SoQt, you'll also need a UB version of Coin and Qt.