Merge pull request #28 from apple/egorzhdan/build-fixes-20230725

🍒[build] Various fixes

Author: egorzhdan

CMakeLists.txt

@@ -6,7 +6,7 @@ if(CMAKE_SYSTEM_NAME STREQUAL Windows)
   option(BUILD_SHARED_LIBS "Build shared libraries by default" YES)
 endif()
 
-set(min_supported_swift_version 5.8)
+set(min_supported_swift_version 5.9)
 if(CMAKE_Swift_COMPILER_VERSION VERSION_LESS "${min_supported_swift_version}")
   message(FATAL_ERROR "Outdated Swift compiler: "
       "Swift ${min_supported_swift_version} or newer is required.")

Sources/LLVM/CMakeLists.txt

@@ -2,7 +2,8 @@ add_library(LLVM_Utils
     LLVM_Utils.swift)
 target_compile_options(LLVM_Utils PUBLIC
     "-emit-module"
-    "-Xfrontend" "-enable-experimental-cxx-interop")
+    "SHELL:-Xcc -std=c++17"
+    "-cxx-interoperability-mode=default")
 target_include_directories(LLVM_Utils PUBLIC
     "${LLVM_MAIN_INCLUDE_DIR}"
     "${LLVM_INCLUDE_DIR}")

Sources/LLVM/LLVM_Utils.swift

@@ -14,7 +14,7 @@
 
 extension String {
   public init(_ stringRef: llvm.StringRef) {
-    self.init(cxxString: stringRef.str())
+    self.init(stringRef.str())
   }
 
   public func withStringRef<Result>(_ body: (llvm.StringRef) -> Result) -> Result {
@@ -34,9 +34,15 @@ extension StaticString {
 }
 
 public func ==(lhs: llvm.StringRef, rhs: StaticString) -> Bool {
+#if $NewCxxMethodSafetyHeuristics
+  let lhsBuffer = UnsafeBufferPointer<UInt8>(
+    start: lhs.bytes_begin(),
+    count: Int(lhs.bytes_end() - lhs.bytes_begin()))
+#else
   let lhsBuffer = UnsafeBufferPointer<UInt8>(
     start: lhs.__bytes_beginUnsafe(),
     count: Int(lhs.__bytes_endUnsafe() - lhs.__bytes_beginUnsafe()))
+#endif
   return rhs.withUTF8Buffer { (rhsBuffer: UnsafeBufferPointer<UInt8>) in
     if lhsBuffer.count != rhsBuffer.count { return false }
     return lhsBuffer.elementsEqual(rhsBuffer, by: ==)