Where can I find a comprehensive list of Swift compiler flags with documentation?

1oo7 · 2021-09-25T19:31:57.702Z

Where can I find a comprehensive list of Swift compiler flags with documentation?

I am trying to figure out what options I can set on a per-file basis in Xcode using the "Compiler Flags" field in the Compile Sources build phase:

Screen Shot 2021-09-25 at 12.30.011066×328 54.4 KB

Ever since Xcode 13, I keep getting build errors that such-and-such file was modified during the build, which is expected since these files are generated by a build script in a prior build phase.

So I would like to disable that particular error on these files. How can I do so?

Or is this just a known bug in Xcode 13?

Thanks.

byaruhaf · 2021-09-25T19:50:23.739Z

Check out XcodeBuildSettings.com for a complete reference of every build setting supported for the latest version of Xcode.

1oo7 · 2021-09-25T20:19:07.716Z

But which one of those settings can be used in this field? How do I know if that's a comprehensive list?

Surely there is some official documentation somewhere about this?

Perhaps the omniscient @xwu might know?

wowbagger · 2021-09-26T08:54:54.591Z

I don't know if they are comprehensive, but maybe swiftc --help-hidden and swiftc -frontend --help-hidden could help?

1oo7 · 2022-05-05T16:32:57.430Z

Answering my own question:

github.com

apple/swift/blob/main/include/swift/Option/FrontendOptions.td

//===--- FrontendOptions.td - Options for swift -frontend -----------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2018 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
//
//  This file defines the options accepted by swift -frontend.
//
//===----------------------------------------------------------------------===//

let Flags = [FrontendOption, NoDriverOption] in {

def triple : Separate<["-"], "triple">, Alias<target>;

This file has been truncated. show original

and

github.com

apple/swift/blob/main/include/swift/Option/Options.td

//===--- Options.td - Options for swift driver ----------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2020 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
//
//  This file defines the options accepted by the swift driver.
//
//===----------------------------------------------------------------------===//

// Include the common option parsing interfaces.
include "llvm/Option/OptParser.td"

/////////

This file has been truncated. show original