iPhone compile for thumb

Question

I\'ve heard it might be a good idea to turn off \"compile for thumb\" in an iPhone target\'s settings to increase performance. I\'m having some trouble finding this setting thou

Answer 1

GCC_THUMB_SUPPORT is the right variable. Just set it to NO to disable THUMB code generation.
A general rule of THUMB is, to disable it if your code is floating point heavy :)
More about that here.

Update:
The advice to compile for the THUMB instruction set is no longer valid (actually since the iPhone 3GS).