[main] Get Swift-Foundation building against MUSL for Swift Static SDK (swiftlang#848)

* Get FoundationEssentials building

Adding the missing musl imports to get FoundationEssentials building for
the Swift static SDKs again.

Also providing an option to disable building the macros. The macros
aren't necessary for building the library and will not be run as part of
the static SDK. No need to bloat the SDK or build times further. For
Swift 6, the macros should be provided by the toolchain since the
toolchain and SDK are current revlocked due to swiftmodules.

* Get FoundationInternationalization building

Adding the missing Musl imports to get FoundationInternationalization
building for the static SDK.

Author: etcwilde

Sources/FoundationEssentials/Calendar/Calendar.swift

@@ -16,6 +16,8 @@ internal import os
 import Android
 #elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #elseif canImport(CRT)
 import CRT
 #elseif os(WASI)

Sources/FoundationEssentials/Calendar/Calendar_Gregorian.swift

@@ -16,6 +16,8 @@ internal import os
 import Android
 #elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #elseif canImport(CRT)
 import CRT
 #elseif os(WASI)

Sources/FoundationEssentials/Data/Data+Reading.swift

@@ -22,6 +22,8 @@ import Darwin
 import Android
 #elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #elseif os(Windows)
 import CRT
 import WinSDK
@@ -32,7 +34,7 @@ import WASILibc
 func _fgetxattr(_ fd: Int32, _ name: UnsafePointer<CChar>!, _ value: UnsafeMutableRawPointer!, _ size: Int, _ position: UInt32, _ options: Int32) -> Int {
 #if canImport(Darwin)
     return fgetxattr(fd, name, value, size, position, options)
-#elseif canImport(Glibc)
+#elseif canImport(Glibc) || canImport(Musl)
     return fgetxattr(fd, name, value, size)
 #else
     return -1

Sources/FoundationEssentials/Data/Data+Writing.swift

@@ -24,6 +24,8 @@ import Android
 import unistd
 #elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #elseif os(Windows)
 import CRT
 import WinSDK
@@ -632,7 +634,7 @@ private func writeExtendedAttributes(fd: Int32, attributes: [String : Data]) {
             // Returns non-zero on error, but we ignore them
 #if canImport(Darwin)
             _ = fsetxattr(fd, key, valueBuf.baseAddress!, valueBuf.count, 0, 0)
-#elseif canImport(Glibc)
+#elseif canImport(Glibc) || canImport(Musl)
             _ = fsetxattr(fd, key, valueBuf.baseAddress!, valueBuf.count, 0)
 #endif
         }

Sources/FoundationEssentials/Date.swift

@@ -16,6 +16,8 @@ import Darwin
 import Bionic
 #elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #elseif canImport(WinSDK)
 import WinSDK
 #elseif os(WASI)

Sources/FoundationEssentials/Decimal/Decimal+Math.swift

@@ -16,6 +16,8 @@ import Darwin
 import Android
 #elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #elseif canImport(CRT)
 import CRT
 #elseif os(WASI)

Sources/FoundationEssentials/Error/CocoaError+FilePath.swift

@@ -19,6 +19,8 @@ import Darwin
 import Bionic
 #elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #elseif os(Windows)
 import CRT
 import WinSDK

Sources/FoundationEssentials/Error/ErrorCodes+POSIX.swift

@@ -14,6 +14,8 @@
 @preconcurrency import Android
 #elseif canImport(Glibc)
 @preconcurrency import Glibc 
+#elseif canImport(Musl)
+@preconcurrency import Musl
 #elseif canImport(Darwin)
 @preconcurrency import Darwin
 #elseif os(Windows)

Sources/FoundationEssentials/FileManager/FileManager+Basics.swift

@@ -16,6 +16,8 @@ import Darwin
 import Android
 #elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #elseif os(Windows)
 import CRT
 import WinSDK

Sources/FoundationEssentials/FileManager/FileManager+Directories.swift

@@ -23,6 +23,8 @@ import Android
 import unistd
 #elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #elseif os(Windows)
 import CRT
 import WinSDK

Sources/FoundationEssentials/FileManager/FileManager+Files.swift

@@ -23,6 +23,9 @@ import posix_filesystem
 #elseif canImport(Glibc)
 import Glibc
 internal import _FoundationCShims
+#elseif canImport(Musl)
+import Musl
+internal import _FoundationCShims
 #elseif os(Windows)
 import CRT
 import WinSDK

Sources/FoundationEssentials/FileManager/FileManager+SymbolicLinks.swift

@@ -17,6 +17,8 @@ import Android
 import unistd
 #elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #elseif os(Windows)
 import CRT
 import WinSDK

Sources/FoundationEssentials/FileManager/FileManager+Utilities.swift

@@ -28,6 +28,9 @@ import Android
 #elseif canImport(Glibc)
 import Glibc
 internal import _FoundationCShims
+#elseif canImport(Musl)
+import Musl
+internal import _FoundationCShims
 #elseif os(Windows)
 import CRT
 import WinSDK

Sources/FoundationEssentials/FileManager/FileOperations+Enumeration.swift

@@ -115,6 +115,8 @@ import posix_filesystem.dirent
 #elseif canImport(Glibc)
 import Glibc
 internal import _FoundationCShims
+#elseif canImport(Musl)
+import Musl
 #elseif os(WASI)
 import WASILibc
 internal import _FoundationCShims
@@ -326,7 +328,7 @@ extension Sequence<_FTSSequence.Element> {
 struct _POSIXDirectoryContentsSequence: Sequence {
     #if canImport(Darwin)
     typealias DirectoryEntryPtr = UnsafeMutablePointer<DIR>
-    #elseif os(Android) || canImport(Glibc) || os(WASI)
+    #elseif os(Android) || canImport(Glibc) || canImport(Musl) || os(WASI)
     typealias DirectoryEntryPtr = OpaquePointer
     #endif
 

Sources/FoundationEssentials/FileManager/FileOperations.swift

@@ -16,6 +16,8 @@ import Darwin
 import Android
 #elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #elseif os(Windows)
 import CRT
 import WinSDK

Sources/FoundationEssentials/Formatting/BinaryInteger+NumericStringRepresentation.swift

@@ -16,6 +16,8 @@ import Darwin
 import Android
 #elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #elseif os(Windows)
 import CRT
 #elseif os(WASI)

Sources/FoundationEssentials/LockedState.swift

@@ -19,6 +19,8 @@ internal import C.os.lock
 import Bionic
 #elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #elseif canImport(WinSDK)
 import WinSDK
 #endif
@@ -29,7 +31,7 @@ package struct LockedState<State> {
     private struct _Lock {
 #if canImport(os)
         typealias Primitive = os_unfair_lock
-#elseif os(Android) || canImport(Glibc)
+#elseif os(Android) || canImport(Glibc) || canImport(Musl)
         typealias Primitive = pthread_mutex_t
 #elseif canImport(WinSDK)
         typealias Primitive = SRWLOCK

Sources/FoundationEssentials/Platform.swift

@@ -35,6 +35,9 @@ fileprivate let _pageSize: Int = Int(getpagesize())
 #elseif canImport(Glibc)
 import Glibc
 fileprivate let _pageSize: Int = Int(getpagesize())
+#elseif canImport(Musl)
+import Musl
+fileprivate let _pageSize: Int = Int(getpagesize())
 #elseif canImport(C)
 fileprivate let _pageSize: Int = Int(getpagesize())
 #endif // canImport(Darwin)

Sources/FoundationEssentials/ProcessInfo/ProcessInfo.swift

@@ -19,6 +19,8 @@ import Bionic
 import unistd
 #elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #elseif os(Windows)
 import WinSDK
 #elseif os(WASI)
@@ -163,7 +165,7 @@ final class _ProcessInfo: Sendable {
     }
 
     var userName: String {
-#if canImport(Darwin) || os(Android) || canImport(Glibc)
+#if canImport(Darwin) || os(Android) || canImport(Glibc) || canImport(Musl)
         // Darwin and Linux
         let (euid, _) = Platform.getUGIDs()
         if let upwd = getpwuid(euid),
@@ -201,7 +203,7 @@ final class _ProcessInfo: Sendable {
 #if os(Android) && (arch(i386) || arch(arm))
         // On LP32 Android, pw_gecos doesn't exist and is presumed to be NULL.
         return ""
-#elseif canImport(Darwin) || os(Android) || canImport(Glibc)
+#elseif canImport(Darwin) || os(Android) || canImport(Glibc) || canImport(Musl)
         let (euid, _) = Platform.getUGIDs()
         if let upwd = getpwuid(euid),
            let fullname = upwd.pointee.pw_gecos {

Sources/FoundationEssentials/PropertyList/OpenStepPlist.swift

@@ -16,6 +16,8 @@ import Darwin
 import Bionic
 #elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #elseif os(WASI)
 import WASILibc
 #endif

Sources/FoundationEssentials/String/String+Path.swift

@@ -16,6 +16,8 @@ internal import os
 import Android
 #elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #elseif os(Windows)
 import WinSDK
 #elseif os(WASI)

Sources/FoundationEssentials/TimeZone/TimeZone_Cache.swift

@@ -16,6 +16,8 @@ import Darwin
 import unistd
 #elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #elseif canImport(ucrt)
 import ucrt
 #endif

Sources/FoundationEssentials/_ThreadLocal.swift

@@ -15,6 +15,8 @@ import Darwin
 import Bionic
 #elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #elseif canImport(WinSDK)
 import WinSDK
 #elseif canImport(threads_h)
@@ -24,7 +26,7 @@ internal import threads
 #endif
 
 struct _ThreadLocal {
-#if canImport(Darwin) || os(Android) || canImport(Glibc)
+#if canImport(Darwin) || os(Android) || canImport(Glibc) || canImport(Musl)
     fileprivate typealias PlatformKey = pthread_key_t
 #elseif USE_TSS
     fileprivate typealias PlatformKey = tss_t
@@ -38,7 +40,7 @@ struct _ThreadLocal {
         fileprivate let key: PlatformKey
 
         init() {
-#if canImport(Darwin) || os(Android) || canImport(Glibc)
+#if canImport(Darwin) || os(Android) || canImport(Glibc) || canImport(Musl)
             var key = PlatformKey()
             pthread_key_create(&key, nil)
             self.key = key
@@ -56,7 +58,7 @@ struct _ThreadLocal {
 
     private static subscript(_ key: PlatformKey) -> UnsafeMutableRawPointer? {
         get {
-#if canImport(Darwin) || os(Android) || canImport(Glibc)
+#if canImport(Darwin) || os(Android) || canImport(Glibc) || canImport(Musl)
             pthread_getspecific(key)
 #elseif USE_TSS
             tss_get(key)
@@ -68,7 +70,7 @@ struct _ThreadLocal {
         }
 
         set {
-#if canImport(Darwin) || os(Android) || canImport(Glibc)
+#if canImport(Darwin) || os(Android) || canImport(Glibc) || canImport(Musl)
             pthread_setspecific(key, newValue)
 #elseif USE_TSS
             tss_set(key, newValue)

Sources/FoundationInternationalization/Calendar/Calendar_ICU.swift

@@ -18,6 +18,8 @@ import FoundationEssentials
 import Android
 #elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #elseif canImport(CRT)
 import CRT
 #elseif canImport(Darwin)

Sources/FoundationInternationalization/Date+ICU.swift

@@ -19,6 +19,8 @@ internal import _FoundationICU
 import Android
 #elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #elseif canImport(Darwin)
 import Darwin
 #endif

Sources/FoundationInternationalization/Formatting/Date/ICUDateFormatter.swift

@@ -22,6 +22,8 @@ import Darwin
 import Android
 #elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #endif
 
 typealias UChar = UInt16

Sources/FoundationInternationalization/Formatting/Duration+Formatting.swift

@@ -20,6 +20,8 @@ import Darwin
 import Android
 #elseif canImport(Glibc)
 import Glibc
+#elseif canImport(Musl)
+import Musl
 #elseif os(Windows)
 import CRT
 #elseif os(WASI)