Suppress warnings from dependencies with Swift Package Manager

Question

Assuming I have a Package.swift like this below, and SomePackage from the dependencies produces warnings during swift build.

// swift-tools-version:4.0
import PackageDescription

let package = Package(
    name: "my-app",
    dependencies: [
        .package(url: "https://some-package.git", .upToNextMajor(from: "1.0"))
    ],
    targets: [
        .target(name: "Run", dependencies: ["SomePackage"]
    ]
)

How can I suppress those warnings from the dependencies, but keep the ones coming from my code?

I'm using a custom script based on CocoaPods' xcodeproj tool which I run after generating my Xcode project. See: gist.github.com/siemensikkema/57ef1ce3340e32b72dc59e44bc37b477 I adjust it to make exceptions for the frameworks that are generating warnings that I don't care about (in my case when working with Vapor 2). — siemensikkema
– siemensikkema, Commented May 29, 2018 at 14:43

clemens · Accepted Answer · 2020-11-15 09:18:33Z

11

With Swift Tools Version 5 you may define compiler flags in the package file (see https://docs.swift.org/package-manager/PackageDescription/PackageDescription.html#swiftsetting). Here is an example for a Package.swift which suppresses compiler warnings during build:

// swift-tools-version:5.0

import PackageDescription

let package = Package(
    name: "Antlr4",
    products: [
        .library(
            name: "Antlr4",
            targets: ["Antlr4"]),
    ],
    targets: [
        .target(
            name: "Antlr4",
            dependencies: [],
            swiftSettings: [
                .unsafeFlags(["-suppress-warnings"]),
            ]),
        .testTarget(
            name: "Antlr4Tests",
            dependencies: ["Antlr4"]),
    ]
)

To suppress warnings only in foreign code you should split the code into two packages.

answered Nov 15, 2020 at 9:18

clemens

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1 Comment

Konstantinos Nikoloutsos Over a year ago

Tried this one out but didn't work for found 1 file(s) which are unhandled; explicitly declare them as resources or exclude from the target. XCode group those warnings as uncategorized can this be the reason why it doesn't work?

Patrick · Accepted Answer · 2021-10-15 18:57:33Z

7

For Objective-C modules, you can use the following to disable all warnings:

cSettings: [
   .unsafeFlags(["-w"])
]

answered Oct 15, 2021 at 18:57

Patrick

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Comments

Anton K · Accepted Answer · 2017-12-15 10:32:09Z

-4

I don't know how to suppress only dependencies warnings but it is possible to suppress all warnings during build by passing this option: -Xswiftc -suppress-warnings. The call will looks like

swift build -Xswiftc -suppress-warnings

answered Dec 15, 2017 at 10:32

Anton K

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3 Comments

Dannie P Over a year ago

Partway solution, like either get all warnings or get none. Thanks.

William Grand Over a year ago

The question is how to suppress warnings on dependencies. So, the answer is not to suppress all warnings.

Richard Topchii Over a year ago

Actually something I was looking for. What would be the equivalent for xodeubild?

ekreloff · Accepted Answer · 2019-03-25 20:29:36Z

-7

If you are using an Xcode 10 project file:

Click the project file in Xcode
Select the target of your dependency
Go to Build Settings
Search for Swift Compiler - Warnings Policies
Set the Suppress Warnings flags appropriately

edited Mar 25, 2019 at 20:29

answered Aug 25, 2018 at 17:46

ekreloff

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2 Comments

João Vitor Over a year ago

In my opinion this way is the most correct and easy.

William Grand Over a year ago

The question is how to suppress warnings on dependencies. So, the answer is not to suppress all warnings.

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