1 files changed, 11 insertions, 0 deletions
diff --git a/Source/cmLocalGenerator.cxx b/Source/cmLocalGenerator.cxx
index 57dabd1..2e40543 100644
--- a/Source/cmLocalGenerator.cxx
+++ b/Source/cmLocalGenerator.cxx
@@ -1564,6 +1564,17 @@ void cmLocalGenerator::AddLanguageFlags(std::string& flags,
   this->AddConfigVariableFlags(flags, cmStrCat("CMAKE_", lang, "_FLAGS"),
                                config);
 
+  if (lang == "Swift") {
+    if (const char* v = target->GetProperty("Swift_LANGUAGE_VERSION")) {
+      if (cmSystemTools::VersionCompare(
+            cmSystemTools::OP_GREATER_EQUAL,
+            this->Makefile->GetDefinition("CMAKE_Swift_COMPILER_VERSION"),
+            "4.2")) {
+        this->AppendFlags(flags, "-swift-version " + std::string(v));
+      }
+    }
+  }
+
   // Add MSVC runtime library flags.  This is activated by the presence
   // of a default selection whether or not it is overridden by a property.
   const char* msvcRuntimeLibraryDefault =