Check value of __clang_major__

Author: grynspan

Sources/Testing/Events/Recorder/Event.HumanReadableOutputRecorder.swift

@@ -8,6 +8,8 @@
 // See https://swift.org/CONTRIBUTORS.txt for Swift project authors
 //
 
+private import _TestingInternals
+
 extension Event {
   /// A type which handles ``Event`` instances and outputs representations of
   /// them as human-readable messages.
@@ -356,6 +358,7 @@ extension Event.HumanReadableOutputRecorder {
 
     case .runStarted:
       var comments = [Comment]()
+      comments.append("Clang Major: \(clangMajor())")
       if verbosity > 0 {
         if let swiftStandardLibraryVersion {
           comments.append("Swift Standard Library Version: \(swiftStandardLibraryVersion)")

Sources/_TestingInternals/Versions.cpp

@@ -14,6 +14,10 @@
 #include <algorithm>
 #include <iterator>
 
+int clangMajor(void) {
+  return __clang_major__;
+}
+
 const char *swt_getTestingLibraryVersion(void) {
 #if defined(SWT_TESTING_LIBRARY_VERSION)
   // The current environment explicitly specifies a version string to return.

Sources/_TestingInternals/include/Versions.h

@@ -30,6 +30,8 @@ static inline uint64_t swt_getSwiftCompilerVersion(void) {
 #endif
 }
 
+SWT_EXTERN int clangMajor(void);
+
 /// Get the human-readable version of the testing library.
 ///
 /// - Returns: A human-readable string describing the version of the testing