Ninja: Honor the LINK_DEPENDS target property (#14796)

Source/cmNinjaTargetGenerator.cxx

@@ -209,6 +209,15 @@ cmNinjaDeps cmNinjaTargetGenerator::ComputeLinkDeps() const
     result.push_back(this->ConvertToNinjaPath(this->ModuleDefinitionFile));
     }
 
+  // Add user-specified dependencies.
+  if (const char* linkDepends = this->Target->GetProperty("LINK_DEPENDS"))
+    {
+    std::vector<std::string> linkDeps;
+    cmSystemTools::ExpandListArgument(linkDepends, linkDeps);
+    std::transform(linkDeps.begin(), linkDeps.end(),
+                   std::back_inserter(result), MapToNinjaPath());
+    }
+
   return result;
 }
 

Tests/BuildDepends/CMakeLists.txt

@@ -34,7 +34,7 @@ if(WIN32 AND "${CMAKE_CXX_COMPILER_ID}" MATCHES "Intel")
   set(_cmake_options "-DCMAKE_EXE_LINKER_FLAGS=")
 endif()
 
-if("${CMAKE_GENERATOR}" MATCHES "Make")
+if("${CMAKE_GENERATOR}" MATCHES "Make|Ninja")
   set(TEST_LINK_DEPENDS ${BuildDepends_BINARY_DIR}/Project/linkdep.txt)
   file(WRITE ${TEST_LINK_DEPENDS} "1")
 endif()