Merge pull request #2921 from scentini/import-glibc

Explicitly import Glibc in files that rely on it

Author: compnerd

Sources/Foundation/Data.swift

@@ -21,6 +21,10 @@ internal func malloc_good_size(_ size: Int) -> Int {
 
 @_implementationOnly import CoreFoundation
 
+#if canImport(Glibc)
+import Glibc
+#endif
+
 internal func __NSDataInvokeDeallocatorUnmap(_ mem: UnsafeMutableRawPointer, _ length: Int) {
 #if os(Windows)
     UnmapViewOfFile(mem)

Sources/Foundation/NSLock.swift

@@ -8,6 +8,11 @@
 //
 
 @_implementationOnly import CoreFoundation
+
+#if canImport(Glibc)
+import Glibc
+#endif
+
 #if os(Windows)
 import WinSDK
 #endif

Sources/Foundation/Thread.swift

@@ -9,6 +9,10 @@
 
 @_implementationOnly import CoreFoundation
 
+#if canImport(Glibc)
+import Glibc
+#endif
+
 // WORKAROUND_SR9811
 #if os(Windows)
 internal typealias _swift_CFThreadRef = HANDLE