The default Architecture
settings for OS X projects created in Xcode is Standard Architectures
(which is - iirc - since XCode 5.1 the x86_64
). To build it for 32bit and 64bit you need to check which architecture is listed with the different options for Architecture
. Currently selecting Universal
will build a universal 32bit and 64bit app.
The listed architectures for Standart Architectures
and Universal
could change with future updates of Xcode, if Apple would e.g. start to support another Architecture for their Desktop environment.
For further details about the difference between Valid Architectures
and Architectures
:
What's the difference between “Architectures” and “Valid Architectures” in Xcode Build Settings?