Cannot find 'URLRequest' in scope when building with the Static Linux SDK

[barnard-b]

When building a Swift package executable using the Swift 6.0.1 toolchain and matching Static Linux SDK, URLRequest and URLSession cannot be found. import FoundationNetworking prevents those errors, but linking fails with errors such as ld.lld: error: undefined symbol: SSL_get_peer_cert_chain

System info

OS: macOS 14.7
Xcode: 16.0 public release, 15.4
Swift: Apple Swift version 6.0.1 (swift-6.0.1-RELEASE) Target: arm64-apple-macosx14.0
Static Linux SDK: swift-6.0.1-RELEASE_static-linux-0.0.1

Output

Without FoundationNetworking

% xcrun --toolchain swift swift build --swift-sdk x86_64-swift-linux-musl
Building for debugging...
error: cannot find 'URLRequest' in scope
 8 |     static func main() async throws {
 9 |         let swiftDotOrg = URL(string: "https://swift.org")!
10 |         let swift = URLRequest(url: swiftDotOrg)
   |                     `- error: cannot find 'URLRequest' in scope
11 |         let (_, response) = try await URLSession.shared.data(for: swift)
12 |         if let statusCode = (response as? HTTPURLResponse)?.statusCode {

error: type 'URLSession' (aka 'AnyObject') has no member 'shared'
 9 |         let swiftDotOrg = URL(string: "https://swift.org")!
10 |         let swift = URLRequest(url: swiftDotOrg)
11 |         let (_, response) = try await URLSession.shared.data(for: swift)
   |                                                  `- error: type 'URLSession' (aka 'AnyObject') has no member 'shared'
12 |         if let statusCode = (response as? HTTPURLResponse)?.statusCode {
13 |             print("Status: \(statusCode)")


error: value of type 'HTTPURLResponse' (aka 'AnyObject') has no member 'statusCode'
10 |         let swift = URLRequest(url: swiftDotOrg)
11 |         let (_, response) = try await URLSession.shared.data(for: swift)
12 |         if let statusCode = (response as? HTTPURLResponse)?.statusCode {
   |                                                             `- error: value of type 'HTTPURLResponse' (aka 'AnyObject') has no member 'statusCode'
13 |             print("Status: \(statusCode)")
14 |         }

With FoundationNetworking

clang: warning: argument unused during compilation: '-pie' [-Wunused-command-line-argument]
ld.lld: error: undefined symbol: SSL_get_peer_cert_chain
>>> referenced by openssl.c:427 (/home/build-user/source/curl/lib/vtls/openssl.c:427)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a

ld.lld: error: undefined symbol: sk_num
>>> referenced by x509.h:142 (/home/build-user/build/sdk_root/x86_64/usr/include/openssl/x509.h:142)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced by x509.h:130 (/home/build-user/build/sdk_root/x86_64/usr/include/openssl/x509.h:130)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced by x509.h:130 (/home/build-user/build/sdk_root/x86_64/usr/include/openssl/x509.h:130)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced 5 more times

ld.lld: error: undefined symbol: BIO_s_mem
>>> referenced by openssl.c:439 (/home/build-user/source/curl/lib/vtls/openssl.c:439)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced by openssl.c:392 (/home/build-user/source/curl/lib/vtls/openssl.c:392)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced by openssl.c:4221 (/home/build-user/source/curl/lib/vtls/openssl.c:4221)
>>>               openssl.c.o:(ossl_connect_common) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced 2 more times

ld.lld: error: undefined symbol: BIO_new
>>> referenced by openssl.c:439 (/home/build-user/source/curl/lib/vtls/openssl.c:439)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced by openssl.c:392 (/home/build-user/source/curl/lib/vtls/openssl.c:392)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced by openssl.c:1421 (/home/build-user/source/curl/lib/vtls/openssl.c:1421)
>>>               openssl.c.o:(cert_stuff) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced 5 more times

ld.lld: error: undefined symbol: BIO_get_mem_data
>>> referenced by openssl.c:647 (/home/build-user/source/curl/lib/vtls/openssl.c:647)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced by openssl.c:651 (/home/build-user/source/curl/lib/vtls/openssl.c:651)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced by openssl.c:453 (/home/build-user/source/curl/lib/vtls/openssl.c:453)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced 18 more times

ld.lld: error: undefined symbol: BIO_reset
>>> referenced by openssl.c:647 (/home/build-user/source/curl/lib/vtls/openssl.c:647)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced by openssl.c:651 (/home/build-user/source/curl/lib/vtls/openssl.c:651)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced by openssl.c:453 (/home/build-user/source/curl/lib/vtls/openssl.c:453)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced 18 more times

ld.lld: error: undefined symbol: PEM_write_bio_X509
>>> referenced by openssl.c:650 (/home/build-user/source/curl/lib/vtls/openssl.c:650)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a

ld.lld: error: undefined symbol: sk_value
>>> referenced by x509.h:142 (/home/build-user/build/sdk_root/x86_64/usr/include/openssl/x509.h:142)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced by x509.h:130 (/home/build-user/build/sdk_root/x86_64/usr/include/openssl/x509.h:130)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced by x509v3.h:206 (/home/build-user/build/sdk_root/x86_64/usr/include/openssl/x509v3.h:206)
>>>               openssl.c.o:(Curl_ossl_verifyhost) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced 1 more times

ld.lld: error: undefined symbol: X509_get_subject_name
>>> referenced by openssl.c:452 (/home/build-user/source/curl/lib/vtls/openssl.c:452)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced by openssl.c:2298 (/home/build-user/source/curl/lib/vtls/openssl.c:2298)
>>>               openssl.c.o:(Curl_ossl_verifyhost) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced by openssl.c:4253 (/home/build-user/source/curl/lib/vtls/openssl.c:4253)
>>>               openssl.c.o:(ossl_connect_common) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a

ld.lld: error: undefined symbol: X509_NAME_print_ex
>>> referenced by openssl.c:452 (/home/build-user/source/curl/lib/vtls/openssl.c:452)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced by openssl.c:455 (/home/build-user/source/curl/lib/vtls/openssl.c:455)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced by openssl.c:1685 (/home/build-user/source/curl/lib/vtls/openssl.c:1685)
>>>               openssl.c.o:(ossl_connect_common) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced 1 more times

ld.lld: error: undefined symbol: X509_get_issuer_name
>>> referenced by openssl.c:455 (/home/build-user/source/curl/lib/vtls/openssl.c:455)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced by openssl.c:4284 (/home/build-user/source/curl/lib/vtls/openssl.c:4284)
>>>               openssl.c.o:(ossl_connect_common) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a

ld.lld: error: undefined symbol: X509_get_version
>>> referenced by openssl.c:458 (/home/build-user/source/curl/lib/vtls/openssl.c:458)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a

ld.lld: error: undefined symbol: BIO_printf
>>> referenced by openssl.c:458 (/home/build-user/source/curl/lib/vtls/openssl.c:458)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced by openssl.c:465 (/home/build-user/source/curl/lib/vtls/openssl.c:465)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced by openssl.c:548 (/home/build-user/source/curl/lib/vtls/openssl.c:548)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced 1 more times

ld.lld: error: undefined symbol: X509_get_serialNumber
>>> referenced by openssl.c:461 (/home/build-user/source/curl/lib/vtls/openssl.c:461)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a

ld.lld: error: undefined symbol: BIO_puts
>>> referenced by openssl.c:463 (/home/build-user/source/curl/lib/vtls/openssl.c:463)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a

ld.lld: error: undefined symbol: X509_get0_signature
>>> referenced by openssl.c:474 (/home/build-user/source/curl/lib/vtls/openssl.c:474)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a

ld.lld: error: undefined symbol: X509_ALGOR_get0
>>> referenced by openssl.c:477 (/home/build-user/source/curl/lib/vtls/openssl.c:477)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a

ld.lld: error: undefined symbol: i2a_ASN1_OBJECT
>>> referenced by openssl.c:478 (/home/build-user/source/curl/lib/vtls/openssl.c:478)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced by openssl.c:486 (/home/build-user/source/curl/lib/vtls/openssl.c:486)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a

ld.lld: error: undefined symbol: X509_get_X509_PUBKEY
>>> referenced by openssl.c:482 (/home/build-user/source/curl/lib/vtls/openssl.c:482)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced by openssl.c:4097 (/home/build-user/source/curl/lib/vtls/openssl.c:4097)
>>>               openssl.c.o:(ossl_connect_common) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a
>>> referenced by openssl.c:4106 (/home/build-user/source/curl/lib/vtls/openssl.c:4106)
>>>               openssl.c.o:(ossl_connect_common) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a

ld.lld: error: undefined symbol: X509_PUBKEY_get0_param
>>> referenced by openssl.c:484 (/home/build-user/source/curl/lib/vtls/openssl.c:484)
>>>               openssl.c.o:(Curl_ossl_certchain) in archive /Users/<username>/Library/org.swift.swiftpm/swift-sdks/swift-6.0.1-RELEASE_static-linux-0.0.1.artifactbundle/swift-6.0.1-RELEASE_static-linux-0.0.1/swift-linux-musl/musl-1.2.5.sdk/x86_64/usr/lib/libcurl.a

ld.lld: error: too many errors emitted, stopping now (use --error-limit=0 to see all errors)
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Package

Package.swift

// swift-tools-version: 6.0

import PackageDescription

let package = Package(
    name: "FoundationTest",
    platforms: [
        .macOS(.v12)
    ],
    targets: [
        .executableTarget(name: "FoundationTest")
    ]
)

Sources/FoundationTest/FoundationTest.swift

import Foundation
#if canImport(Musl)
// Finds `URLSession` and `URLRequest`, linking fails
//import FoundationNetworking
#endif

@main
struct App {
    static func main() async throws {
        let swiftDotOrg = URL(string: "https://swift.org")!
        let swift = URLRequest(url: swiftDotOrg)
        let (_, response) = try await URLSession.shared.data(for: swift)
        if let statusCode = (response as? HTTPURLResponse)?.statusCode {
            print("Status: \(statusCode)")
        }
    }
}

[jmschonfeld]

You'll need an import FoundationNetworking since that's the module that contains URLSession/URLRequest, but the linking failure sounds like a bug to me. I'm going to transfer this over to the swift-corelibs-foundation repo where FoundationNetworking lives

[jmschonfeld]

@jrflat do you know if the curl lib that we build on Linux is supposed to reference these seemingly OpenSSL symbols? I see in the normal build we have self.cmake_options.define('CMAKE_USE_OPENSSL', 'NO') set, so I'm wondering if maybe the Static SDK build (which I believe uses an entirely separate build script) is missing some options to exclude the use of these symbols? If it is expected that we'd have them, then we're likely missing an auto link flag in the FoundationNetworking build to indicate the library that needs to be linked that contains the symbols.

[jmschonfeld]

Indeed, I think these parameters for the Static SDK build:

https://github.com/swiftlang/swift-docker/blob/38e4244ebab3d6a4e702fb30449827d6c28ee1fd/swift-ci/sdks/static-linux/scripts/build.sh#L617-L623

Look like they're missing quite a few flags from the normal build:

https://github.com/swiftlang/swift/blob/106e05f5496f7efc464e23ad07062d218379eaae/utils/swift_build_support/swift_build_support/products/curl.py#L90-L118

@etcwilde were these extra flags intentionally omitted?

[barnard-b]

You'll need an import FoundationNetworking since that's the module that contains URLSession/URLRequest...

Oh ok, I thought that had changed with the new Foundation.

[jrflat]

@jrflat do you know if the curl lib that we build on Linux is supposed to reference these seemingly OpenSSL symbols? I see in the normal build we have self.cmake_options.define('CMAKE_USE_OPENSSL', 'NO') set, so I'm wondering if maybe the Static SDK build (which I believe uses an entirely separate build script) is missing some options to exclude the use of these symbols?

I think the curl lib we build doesn't reference those OpenSSL symbols. But this also requires both CMAKE_USE_OPENSSL=NO and CMAKE_USE_LIBSSH2=NO since otherwise libcurl depends on libssh2 which references OpenSSL.

[etcwilde]

SSL should be available in the musl SDK since it includes BoringSSL, which that copy of curl should be getting compiled against.

https://github.com/swiftlang/swift-docker/blob/38e4244ebab3d6a4e702fb30449827d6c28ee1fd/swift-ci/sdks/static-linux/scripts/build.sh#L595-L611

I don't believe SSL or SSH support are enabled for the copy of curl in the Windows Swift SDKs though either, so we may be able to disable that functionality.

@al45tair, ideas on this?

[IlyaGulya]

Having same issue while trying to compile application which uses FoundationNetworking
Swift SDK: swift-6.0.1-RELEASE_static-linux-0.0.1
Building on Macbook M3 Pro, macOS 15

command I'm using to build:

xcrun --toolchain swift swift build -c release --swift-sdk aarch64-swift-linux-musl

Here's logs:
https://gist.github.com/IlyaGulya/37369cc4299008fd8b548f43d3efcb1a

Repo where you can reproduce the issue: https://github.com/IlyaGulya/figma-export

[IlyaGulya]

FYI, I managed to compile by adding some linker flags:

xcrun --toolchain swift swift build -c release --swift-sdk aarch64-swift-linux-musl -Xlinker -lz -Xlinker -licuuc -Xlinker -licudata -Xlinker -lssl -Xlinker -lcrypto

[ffried]

Passing linker flag provided by @IlyaGulya in the CLI works only if the package does not use build tool plugins. Otherwise building the build tool plugin fails.
However, you can also specify those on the targets that use FoundationNetworking:

linkerSettings: [
    .linkedLibrary("crypto"),
    .linkedLibrary("icudata"),
    .linkedLibrary("icuuc"),
    .linkedLibrary("ssl"),
    .linkedLibrary("z"),
]

With that, you can even limit this to Linux:

linkerSettings: [
    .linkedLibrary("crypto", .when(platforms: [.linux])),
    .linkedLibrary("icudata", .when(platforms: [.linux])),
    .linkedLibrary("icuuc", .when(platforms: [.linux])),
    .linkedLibrary("ssl", .when(platforms: [.linux])),
    .linkedLibrary("z", .when(platforms: [.linux])),
]

[al45tair]

I would have expected these to be pulled in via autolinking, but maybe they aren't being. I note that the static-executable-args.lnk file for Linux does include references to icudata and icuuc (unlike the one for the Static SDK), but it doesn't include crypto, ssl or z — though maybe that's because FoundationNetworking wouldn't be statically linked there.

[al45tair]

Looks like some autolink arguments went missing in the Foundation re-core. (I'm just testing a fix and then I'll raise a PR.)