Revert "Merge pull request #64312 from gwynne/patch-2"

This reverts commit 1b64e76, reversing
changes made to 5ef25e7.

Author: MaxDesiatov

lib/DriverTool/autolink_extract_main.cpp

@@ -243,50 +243,16 @@ int autolink_extract_main(ArrayRef<const char *> Args, const char *Argv0,
   std::vector<std::string> LinkerFlags;
 
   // Keep track of whether we've already added the common
-  // Swift libraries that usually have autolink directives
-  // in most object files
-
-  std::vector<std::string> SwiftRuntimeLibsOrdered = {
-      // Common Swift runtime libs
-      "-lswiftSwiftOnoneSupport",
-      "-lswiftCore",
-      "-lswift_Concurrency",
-      "-lswift_StringProcessing",
-      "-lswift_RegexBuilder",
-      "-lswift_RegexParser",
-      "-lswift_Backtracing",
-      "-lswiftGlibc",
-      "-lBlocksRuntime",
-      // Dispatch-specific Swift runtime libs
-      "-ldispatch",
-      "-lDispatchStubs",
-      "-lswiftDispatch",
-      // CoreFoundation and Foundation Swift runtime libs
-      "-lCoreFoundation",
-      "-lFoundation",
-      "-lFoundationNetworking",
-      "-lFoundationXML",
-      // Foundation support libs
-      "-lcurl",
-      "-lxml2",
-      "-luuid",
-      // XCTest runtime libs (must be first due to http://github.com/apple/swift-corelibs-xctest/issues/432)
-      "-lXCTest",
-      // ICU Swift runtime libs
-      "-licui18nswift",
-      "-licuucswift",
-      "-licudataswift",
-      // Common-use ordering-agnostic Linux system libs
-      "-lm",
-      "-lpthread",
-      "-lutil",
-      "-ldl",
-      "-lz",
+  // Swift libraries that ususally have autolink directives
+  // in most object fiels
+  std::unordered_map<std::string, bool> SwiftRuntimeLibraries = {
+      {"-lswiftSwiftOnoneSupport", false},
+      {"-lswiftCore", false},
+      {"-lswift_Concurrency", false},
+      {"-lswift_StringProcessing", false},
+      {"-lswift_RegexParser", false},
+      {"-lswift_Backtracing", false},
   };
-  std::unordered_map<std::string, bool> SwiftRuntimeLibraries;
-  for (const auto &RuntimeLib : SwiftRuntimeLibsOrdered) {
-    SwiftRuntimeLibraries[RuntimeLib] = false;
-  }
 
   // Extract the linker flags from the objects.
   for (const auto &BinaryFileName : Invocation.getInputFilenames()) {
@@ -323,11 +289,9 @@ int autolink_extract_main(ArrayRef<const char *> Args, const char *Argv0,
     OutOS << Flag << '\n';
   }
 
-  for (const auto &RuntimeLib : SwiftRuntimeLibsOrdered) {
-    auto entry = SwiftRuntimeLibraries.find(RuntimeLib);
-    if (entry != SwiftRuntimeLibraries.end() && entry->second) {
-      OutOS << entry->first << '\n';
-    }
+  for (const auto &RuntimeLib : SwiftRuntimeLibraries) {
+    if (RuntimeLib.second)
+      OutOS << RuntimeLib.first << '\n';
   }