VS: Disallow ReferenceOutputAssembly in ProjectReference if not possible

Explicitly turn off `ReferenceOutputAssembly` in `ProjectReference`
elements naming other project files whose types do not produce
assemblies.  We already do this for `C#` but it makes sense for other
languages too.

Fixes: #17906

1 files changed, 21 insertions, 23 deletions

diff --git a/Source/cmVisualStudio10TargetGenerator.cxx b/Source/cmVisualStudio10TargetGenerator.cxx
index 41567a3..114f5ec 100644
--- a/Source/cmVisualStudio10TargetGenerator.cxx
+++ b/Source/cmVisualStudio10TargetGenerator.cxx
@@ -3778,31 +3778,29 @@ void cmVisualStudio10TargetGenerator::WriteProjectReferences(Elem& e0)
     e2.Element("Project", "{" + this->GlobalGenerator->GetGUID(name) + "}");
     e2.Element("Name", name);
     this->WriteDotNetReferenceCustomTags(e2, name);
-    if (this->Managed) {
-      // If the dependency target is not managed (compiled with /clr or
-      // C# target) we cannot reference it and have to set
-      // 'ReferenceOutputAssembly' to false.
-      auto referenceNotManaged =
-        dt->GetManagedType("") < cmGeneratorTarget::ManagedType::Mixed;
-      // Workaround to check for manually set /clr flags.
-      if (referenceNotManaged) {
-        if (const auto* flags = dt->GetProperty("COMPILE_OPTIONS")) {
-          std::string flagsStr = flags;
-          if (flagsStr.find("clr") != std::string::npos) {
-            // There is a warning already issued when building the flags.
-            referenceNotManaged = false;
-          }
+
+    // If the dependency target is not managed (compiled with /clr or
+    // C# target) we cannot reference it and have to set
+    // 'ReferenceOutputAssembly' to false.
+    auto referenceNotManaged =
+      dt->GetManagedType("") < cmGeneratorTarget::ManagedType::Mixed;
+    // Workaround to check for manually set /clr flags.
+    if (referenceNotManaged) {
+      if (const auto* flags = dt->GetProperty("COMPILE_OPTIONS")) {
+        std::string flagsStr = flags;
+        if (flagsStr.find("clr") != std::string::npos) {
+          // There is a warning already issued when building the flags.
+          referenceNotManaged = false;
         }
       }
-      // Workaround for static library C# targets
-      if (referenceNotManaged &&
-          dt->GetType() == cmStateEnums::STATIC_LIBRARY) {
-        referenceNotManaged = !dt->HasLanguage("CSharp", "");
-      }
-      if (referenceNotManaged) {
-        e2.Element("ReferenceOutputAssembly", "false");
-        e2.Element("CopyToOutputDirectory", "Never");
-      }
+    }
+    // Workaround for static library C# targets
+    if (referenceNotManaged && dt->GetType() == cmStateEnums::STATIC_LIBRARY) {
+      referenceNotManaged = !dt->HasLanguage("CSharp", "");
+    }
+    if (referenceNotManaged) {
+      e2.Element("ReferenceOutputAssembly", "false");
+      e2.Element("CopyToOutputDirectory", "Never");
     }
   }
 }