1 files changed, 10 insertions, 1 deletions
diff --git a/Source/cmNinjaTargetGenerator.cxx b/Source/cmNinjaTargetGenerator.cxx
index d406c99..0c7591a 100644
--- a/Source/cmNinjaTargetGenerator.cxx
+++ b/Source/cmNinjaTargetGenerator.cxx
@@ -188,7 +188,16 @@ std::string cmNinjaTargetGenerator::ComputeFlagsForObject(
     }
   }
 
-  std::string flags = this->GetFlags(language, config, filterArch);
+  std::string flags;
+  // explicitly add the explicit language flag before any other flag
+  // this way backwards compatibility with user flags is maintained
+  if (source->GetProperty("LANGUAGE")) {
+    this->LocalGenerator->AppendFeatureOptions(flags, language,
+                                               "EXPLICIT_LANGUAGE");
+    flags += " ";
+  }
+
+  flags += this->GetFlags(language, config, filterArch);
 
   // Add Fortran format flags.
   if (language == "Fortran") {