Build rules for Swift source files

Question

Xcode supports custom Build Rules for different source files. I am particularly interested in Swift build rule.

What should be correct script to compile the sources and what to specify in Output Files ?

Please, answer the question if you did have experience with that.

Answer 1

Swift files are compiled with swiftc implicitly, as well as Obj-C with clang . Afaik it's not possible to substitute that call with a Build Rule, as you also would need to pass tons of arguments for the optimizer, libraries for linker etc The output of source code compilation is object files (*.o), which are then linked together to form a resulting binary.

You can read about this process here and here .